CN115141616A - Pickling stuck releasing agent, preparation method thereof and pickling stuck releasing method - Google Patents
Pickling stuck releasing agent, preparation method thereof and pickling stuck releasing method Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000005554 pickling Methods 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 139
- 239000002002 slurry Substances 0.000 claims abstract description 74
- 239000002253 acid Substances 0.000 claims abstract description 64
- 238000002791 soaking Methods 0.000 claims abstract description 64
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000012530 fluid Substances 0.000 claims abstract description 37
- 239000003112 inhibitor Substances 0.000 claims abstract description 35
- 238000005260 corrosion Methods 0.000 claims abstract description 19
- 230000007797 corrosion Effects 0.000 claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052742 iron Inorganic materials 0.000 claims abstract description 18
- 239000003381 stabilizer Substances 0.000 claims abstract description 18
- 238000005553 drilling Methods 0.000 claims description 213
- 239000003921 oil Substances 0.000 claims description 48
- 150000003839 salts Chemical class 0.000 claims description 42
- 229920000642 polymer Polymers 0.000 claims description 39
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 33
- 239000007787 solid Substances 0.000 claims description 30
- 239000000314 lubricant Substances 0.000 claims description 25
- 239000000654 additive Substances 0.000 claims description 23
- 230000000996 additive effect Effects 0.000 claims description 23
- 239000010687 lubricating oil Substances 0.000 claims description 23
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 22
- NYRAVIYBIHCEGB-UHFFFAOYSA-N [K].[Ca] Chemical compound [K].[Ca] NYRAVIYBIHCEGB-UHFFFAOYSA-N 0.000 claims description 17
- 239000011248 coating agent Substances 0.000 claims description 17
- 239000000440 bentonite Substances 0.000 claims description 16
- 229910000278 bentonite Inorganic materials 0.000 claims description 16
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 16
- -1 iron ion Chemical class 0.000 claims description 16
- 235000021110 pickles Nutrition 0.000 claims description 16
- 239000000126 substance Substances 0.000 claims description 16
- 238000002347 injection Methods 0.000 claims description 14
- 239000007924 injection Substances 0.000 claims description 14
- 239000010428 baryte Substances 0.000 claims description 13
- 229910052601 baryte Inorganic materials 0.000 claims description 13
- 239000000243 solution Substances 0.000 claims description 13
- 125000006850 spacer group Chemical group 0.000 claims description 13
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 12
- 239000010426 asphalt Substances 0.000 claims description 11
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 11
- 150000005846 sugar alcohols Polymers 0.000 claims description 11
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 10
- 229920001285 xanthan gum Polymers 0.000 claims description 10
- 239000000230 xanthan gum Substances 0.000 claims description 10
- 229940082509 xanthan gum Drugs 0.000 claims description 10
- 235000010493 xanthan gum Nutrition 0.000 claims description 10
- 150000001412 amines Chemical class 0.000 claims description 7
- 229920002635 polyurethane Polymers 0.000 claims description 7
- 239000004814 polyurethane Substances 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- NWGKJDSIEKMTRX-AAZCQSIUSA-N Sorbitan monooleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O NWGKJDSIEKMTRX-AAZCQSIUSA-N 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 235000006408 oxalic acid Nutrition 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 4
- 238000004904 shortening Methods 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 description 27
- 229910000831 Steel Inorganic materials 0.000 description 25
- 239000010959 steel Substances 0.000 description 25
- 239000007788 liquid Substances 0.000 description 21
- 238000005086 pumping Methods 0.000 description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 12
- 238000002955 isolation Methods 0.000 description 10
- 239000011734 sodium Substances 0.000 description 9
- 230000003068 static effect Effects 0.000 description 9
- 239000004115 Sodium Silicate Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 8
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 8
- 229910052911 sodium silicate Inorganic materials 0.000 description 8
- 239000003208 petroleum Substances 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 241000196324 Embryophyta Species 0.000 description 6
- 229920000768 polyamine Polymers 0.000 description 6
- 239000002283 diesel fuel Substances 0.000 description 5
- 230000000149 penetrating effect Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 240000006891 Artemisia vulgaris Species 0.000 description 2
- 235000003261 Artemisia vulgaris Nutrition 0.000 description 2
- 238000003776 cleavage reaction Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 229910000833 kovar Inorganic materials 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000007017 scission Effects 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 241001291562 Martes pennanti Species 0.000 description 1
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/02—Spotting, i.e. using additives for releasing a stuck drill
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Marine Sciences & Fisheries (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Lubricants (AREA)
Abstract
The invention provides a pickling and unfreezing agent, a preparation method thereof and a pickling and unfreezing method, wherein the pickling and unfreezing agent comprises hydrochloric acid, a corrosion inhibitor, HF acid, an iron ion stabilizer, white oil and water; wherein, the mass volume percentage concentrations of the hydrochloric acid, the corrosion inhibitor, the HF acid, the iron ion stabilizer, the white oil and the water are respectively 15-20%, 1.5-3%, 3-5%, 1-2%, 5-10% and 70-80%. The invention also provides a pickling and unfreezing method, which comprises the following steps: and sequentially injecting the pad fluid, the above-mentioned acid-soaking stuck-releasing agent, the post-pad fluid and the replacement slurry into the well in which stuck drill occurs. Compared with the prior art, the method for releasing the stuck by the acid soaking has the advantages of simple process, small using amount of the acid soaking stuck-releasing agent, capability of greatly reducing economic loss, shortening the construction time for releasing the stuck and improving the success rate of releasing the stuck, and no pollution to the environment.
Description
Technical Field
The invention relates to a pickling and unfreezing agent, a preparation method thereof and a pickling and unfreezing method, and belongs to the technical field of petroleum drilling.
Background
Oil wells drilled by the Ma 18 well regions of the quasi-Geer basin mugwort lake oil field are mostly horizontal wells, the well depth is generally designed to be 5000-6000m, and the horizontal section length is 800-2000m. The well body structure is three open wells: one-way phi 381.0mm multiplied by 500m, two-way phi 241.3mm multiplied by 3150m, three-way phi 165.1mm multiplied by well completion depth. In the third-opening project, rotary guide or screw rod orientation and composite drilling are adopted. The main strata of drilling encounter are upper gram group, lower gram group and Baikou spring group. The drilling fluid system is a high-density potassium-calcium based polyurethane organic salt system, and the designed density interval is 1.60-1.75g/cm 3 Wherein the high-density calcium potassium based polyamino organic salt system comprises the following components in percentage by mass and volume: 4% bentonite, 0.2% Na 2 CO 3 0.3% NaOH, 0.6% medium molecular polymer fluid loss additive, 0.6% high molecular polymer coating agent, 7% KCl, 1% amine-based inhibitor, 10% organic salt, 0.2-0.5% CaO, 2-3% natural asphalt powder, 1-2% ultrafine calcium carbonate, 2% polyalcohol, 1-2% liquid lubricant, 1-2% solid lubricant, 2% plugging while drilling agent, barite and water. After three openings, directional deflecting and horizontal section adjusting tracks are drilled, and mud cakes are easy to adhere to stuck drill bits. The reason is that: the upper group and the lower group of the gram are gray mudstone sandstone and brown mudstone interbedded layers, and the Baikou spring group of the target layer is mainly gray fluorescent glutenite and sometimes encounters long-section brown mudstone. Once the low-density solid phase and sand content in the high-density slurry are too high, if the lubricating property does not reach the standard, the solid control equipment is not well used, and pressure supporting and drill sticking are easy to happen. The brown mudstone has extremely strong water sensitivity, once the drilling fluid has insufficient inhibition, the physical support is insufficient, the mud easily collapses and falls into blocks under the ground stress after being drilled, and the mud is easy to deform and reduce the diameter after absorbing water and expanding. Meanwhile, because brown mudstone has extremely strong dispersibility and is easy to disperse ultra-fine particles below 2 microns, mud is polluted, a virtual thick mud cake is formed on a well wall, the prolonged friction resistance is increased, the viscosity of the mud cake is increased, the rotary conduction stick-slip value is increased, or a PDC screw is seriously supported and pressed in a directional manner, so that drilling cannot be performed, or even drilling jamming occurs.
Once sticking stuck and brown mudstone reduced stuck bits occur in this area, the stuck bits are generally stuck by an oil-based stuck freeing agent, but the oil-based stuck freeing agent has the following disadvantages:
1. the soaking time is long, generally 8-12h, if the card is not released after 48h, the card needs to be replaced again and then soaked again, sometimes two or more times of soaking are needed, and the construction period is long;
2. although the soaking is carried out for a plurality of times, the success rate is lower and is only 50 percent;
3. the oil-based stuck freeing agent has high cost, and once stuck can not be cleared, the period is delayed and the economic loss is huge.
Therefore, providing a novel pickle acid unfreezing agent, a preparation method thereof and a pickle acid unfreezing method becomes a technical problem to be solved in the field.
Disclosure of Invention
In order to solve the above disadvantages and shortcomings, it is an object of the present invention to provide an acid pickle stuck releasing agent.
The invention also aims to provide a preparation method of the acid soaking and unfreezing agent.
Still another object of the present invention is to provide a method for the cleavage of cards with the use of the above-mentioned pickle-acid cleavage agent.
In order to achieve the above objects, in one aspect, the present invention provides a pakcid-releasing agent, wherein the pakcid-releasing agent comprises hydrochloric acid, a corrosion inhibitor, HF acid, an iron ion stabilizer, white oil and water;
wherein, the mass volume percentage concentrations of the hydrochloric acid, the corrosion inhibitor, the HF acid, the iron ion stabilizer, the white oil and the water are respectively 15-20%, 1.5-3%, 3-5%, 1-2%, 5-10% and 70-80%. The sum of the mass volume percentage concentration of each component in the acid soaking and stuck releasing agent is 100 percent.
As a specific embodiment of the above-mentioned acid-soaking stuck releasing agent of the present invention, the mass volume percentage concentrations of the hydrochloric acid, the corrosion inhibitor, the HF acid, the iron ion stabilizer, the white oil and the water are 15%, 1.5%, 3%, 1%, 5% and 74.5%, respectively.
As a specific embodiment of the above-mentioned acid-soaking stuck-releasing agent, the corrosion inhibitor includes span 80 and graphite powder.
As a specific embodiment of the above-mentioned acid-soaking and stuck-releasing agent of the present invention, the mass volume percentage concentrations of the span 80 and the graphite powder are 1% and 0.5%, respectively.
As a specific embodiment of the above-mentioned acid-soaking and stuck-releasing agent of the present invention, wherein the iron ion stabilizer comprises oxalic acid.
As a specific embodiment of the above-mentioned acid-soaking and stuck-releasing agent of the present invention, the mass percentage concentration of the hydrochloric acid is 5-20%. In the field operation process, commercially available concentrated hydrochloric acid with the mass percent concentration of 30-36% can be diluted to obtain hydrochloric acid with the mass percent concentration of 5-20%.
In a specific embodiment of the above-mentioned acid pickle stuck remover, the concentration of HF acid is 40% by mass.
As a specific embodiment of the above-mentioned acid-soaking stuck-releasing agent of the present invention, wherein the density of the acid-soaking stuck-releasing agent is 1.05-1.18g/cm 3 . The density of the pickle unfreezing agent can be adjusted by the using amount of barite powder contained in the pickle unfreezing agent.
In another aspect, the present invention also provides a preparation method of the above-mentioned pickle unfreezing agent, wherein the preparation method comprises:
at normal temperature and under the stirring condition, hydrochloric acid, a corrosion inhibitor, HF acid and an iron ion stabilizer are uniformly mixed in water, and white oil is added to obtain the acid-soaking stuck remover.
In another aspect, the present invention also provides a method for releasing the stuck sodium silicate, wherein the method for releasing the stuck sodium silicate comprises:
and sequentially injecting the pad fluid, the acid soaking stuck-releasing agent, the post fluid and the replacement slurry into the well with stuck drill.
As a specific embodiment of the above method for acid soaking and unfreezing of the card, the method further includes: and (3) injecting an oil-based stuck freeing agent into the well with stuck drill bits for freeing stuck drill bits, and if stuck drill bits cannot be cleared after the oil-based stuck freeing agent is repeatedly injected for 2-10 times (preferably for 2-5 times), sequentially injecting the pad fluid, the acid-soaking stuck freeing agent, the post fluid and the slurry replacement into the well with stuck drill bits. The repeatedly injected oil-based stuck freeing agent can be completely the same in composition or different in composition, and can be reasonably adjusted according to the actual working conditions on site.
As a specific embodiment of the above-mentioned acid soaking and unfreezing method, the oil-based unfreezing agent comprises 15-20% of solid unfreezing agent RH, 60-70% of diesel oil, 5-10% of fast penetrating agent (fast T) and 10-20% of water in percentage by mass and volume. Wherein, the solid releasing agent RH and the fast penetrating agent (fast T) are both purchased from Oze worker Ma Dow liability company of Clarity City.
In an embodiment of the method for releasing the stuck sodium silicate by using the bubble acid, the oil-based releasing agent comprises 75% of diesel oil, 20% of fast T penetrant and 5% of lubricant by mass volume percentage concentration. The fast T penetrant is a fast penetrant (fast T) and is available from Oze Gomao Limited liability company, clarity, inc. The oil-based stuck freeing agent with the components is an oil-based stuck freeing agent which is fast and convenient to prepare and is adopted for shortening the handling time of stuck accidents on site.
In a specific embodiment of the above-mentioned method for releasing the pickled dicarback by using the pickling solution, the number of times of repeatedly injecting the pickling solution into the dicarback is 2-3 times. If the acid-soaking stuck releasing agent cannot be released after being repeatedly injected for 2-3 times, the acid-soaking stuck releasing agent cannot be continuously injected, and engineering measures such as explosion buckle releasing and the like are required to be adopted to continuously release the stuck object.
In an embodiment of the above-mentioned method for releasing the stuck substance by acid soaking, when the acid soaking and releasing agent is repeatedly injected, the previously injected acid soaking and releasing agent is replaced and then the next injection of the acid soaking and releasing agent is performed. In some embodiments of the invention, the slurry may be used to replace the previously injected effervescent stuck releasing agent before the next injection of the effervescent stuck releasing agent.
In the invention, after the acid-soaking stuck freeing agent is injected into a well in which stuck drilling occurs, the torque of the drilling tool can be properly adjusted, and the movable drilling tool is lifted up or lowered down to a certain hanging weight to assist in realizing stuck freeing. In addition, the method does not make specific requirements on how to adjust the torque value when the torque of the drilling tool is adjusted, and can be reasonably adjusted according to actual working conditions on site.
In a specific embodiment of the above method for releasing the stuck sodium silicate in the invention, the stuck sodium silicate is injected into the well in which the stuck sodium silicate is generated within 72 hours of the well in which the stuck sodium silicate is generated to release the stuck sodium silicate.
As a specific embodiment of the above-mentioned acid-soaking stuck-releasing method, the injection amount of the acid-soaking stuck-releasing agent is 6-12m 3 。
In one embodiment of the method for acid-soaking and unfreezing of the present invention, the injection amount of the pad fluid is 2-5m 3 The injection amount of the postposition liquid is 2-5m 3 . In addition, the injection amount of the replacement slurry needs to be calculated on site according to the structure of the well body on site and the specific pump displacement used.
As a specific embodiment of the acid-soaking and stuck-releasing method, the pre-liquid and the post-liquid are both isolation liquids, and the isolation liquids comprise, by mass volume percentage concentration, 4-5% of sakaguchi slurry, 0.3-0.6% of xanthan gum, barite powder and water, wherein the usage amount of the barite powder is used for adjusting the density of the isolation liquids to 1.30-1.75g/m 3 The standard is.
As a specific embodiment of the acid-soaking stuck freeing method, the pre-solution and the post-solution are both isolation solutions, and comprise 4% of sakaguchi slurry, 0.5% of xanthan gum, barite powder and water by mass volume percentage concentration, wherein the dosage of the barite powder is used for adjusting the density of the isolation solution to 1.30-1.75g/m 3 The standard is.
As a specific embodiment of the above-mentioned acid-soaking and stuck-freeing method, the slurry substitute is high-density potassium-calcium-based polyurethane organic salt system slurry with a density of 1.60-1.75g/cm 3 And the viscosity of the Marshall funnel is 60-70s, wherein the high-density potassium-calcium based polyurethane organic salt system slurry comprises the following components in percentage by mass and volume: 2-5% of bentonite and 0.2-0.3% of Na 2 CO 3 0.3-0.8% of NaOH, 0.6-1.5% of medium molecular polymerThe material fluid loss additive, 0.3-0.8% of high molecular polymer coating agent, 7-8% of KCl, 0.5-1% of amine inhibitor, 10-20% of organic salt, 0.2-0.5% of CaO, 2-3% of natural asphalt powder, 1-2% of superfine calcium carbonate, 0.5-2% of polyalcohol, 1-2% of liquid lubricant, 1-2% of solid lubricant, 2-5% of plugging agent while drilling, barite and water;
preferably, the high-density kalium-calcium based polyamino organic salt system slurry comprises, in mass volume percentage concentration: 4% of bentonite and 0.2% of Na 2 CO 3 0.3 percent of NaOH, 0.6 percent of medium molecular polymer fluid loss additive, 0.6 percent of high molecular polymer coating agent, 7 percent of KCl, 1 percent of amino inhibitor, 10 percent of organic salt, 0.2 to 0.5 percent of CaO, 2 to 3 percent of natural asphalt powder, 1 to 2 percent of superfine calcium carbonate, 2 percent of polyalcohol, 1 to 2 percent of liquid lubricant, 1 to 2 percent of solid lubricant, 2 percent of while-drilling plugging agent, barite and water.
In the invention, all the components used in the slurry replacement are conventional substances and can be obtained commercially. For example, in some embodiments of the present invention, the organic salt and the polymeric alcohol can be organic salt Weigh1 and polymeric alcohol PPGS-1, respectively, both available from Beijing Peucangjia technology development, inc.; the high molecular polymer coating agent can be PMHA-II produced by Clarity friend chemical plant; the amino inhibitor can be polyamine SMJA-1 for drilling fluid produced by Shandong Ke Runda Petroleum science and technology Limited; the medium molecular polymer fluid loss additive, the liquid lubricant, the solid lubricant and the plugging agent while drilling can be respectively medium molecular polymer fluid loss additive SP-8, liquid lubricant LU-99, solid lubricant LU-66 and plugging agent while drilling TP-2, all of which are purchased from Oze Korea company of Claritie City.
As a specific embodiment of the above-mentioned method for releasing stuck by using acid soaking, the well in which stuck drilling occurs includes a vertical well in which stuck drilling occurs, a directional well with a large inclination, a horizontal well with a large displacement, or the like.
In the present invention, the "mass-volume percentage concentration" refers to a ratio of the mass of a component contained in a target product to the total volume of the target product. For example, the mass volume percentage concentration of the component A of 30% in the target product means that the mass of the component A is 30g in 100mL of the target product. Of course, the volume unit and the mass unit in the invention are not limited to mL and g, and can be adjusted according to the actual working condition on site, but the volume unit and the mass unit used for the same target product need to be kept consistent.
Compared with the prior art, the beneficial technical effects which can be achieved by the invention comprise:
1. the method for releasing the stuck by the acid soaking is simple in process, the using amount of the acid soaking stuck-releasing agent is small, and the single injection amount is only 6-12m 3 ；
2. The method for releasing the stuck substance by using the acid soaking has short construction time, and the stuck substance can be released only by pumping the acid soaking and releasing agent for 1-8 hours under general conditions;
3. compared with an oil-based stuck freeing agent, the acid-soaked stuck freeing agent provided by the invention has high stuck freeing success rate, stuck freeing can be realized by injecting the acid-soaked stuck freeing agent in time within 72 hours, and the stuck freeing rate is 100%;
4. the acid soaking stuck releasing method provided by the invention effectively avoids huge economic loss caused by that a rotary guide tool or an LWD screw rod directional tool sinks and buries the rotary guide tool and the LWD screw rod directional tool after engineering measures such as explosion thread loosening, milling and salvaging are still not effective under the condition that the oil soaking stuck releasing agent is ineffective;
5. compared with an oil-based stuck freeing agent, when the acid-soaking stuck freeing agent is used for freeing stuck materials, acid liquor can completely permeate into a stratum due to strong corrosion after acid-soaking stuck freeing, and the environment is not polluted.
Detailed Description
It is noted that the term "comprises" and any variations thereof in the description and claims of the present invention is intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The "ranges" disclosed herein are given as lower and upper limits. There may be one or more lower limits, and one or more upper limits, respectively. The given range is defined by the selection of a lower limit and an upper limit. The selected lower and upper limits define the boundaries of the particular range. All ranges defined in this manner are combinable, i.e., any lower limit can be combined with any upper limit to form a range. For example, ranges of 60-120 and 80-110 are listed for particular parameters, with the understanding that ranges of 60-110 and 80-120 are also contemplated. Further, if the minimum range values listed are 1 and 2 and the maximum range values listed are 3,4, and 5, then the following ranges are all contemplated: 1-3, 1-4, 1-5, 2-3, 2-4 and 2-5.
In the present invention, unless otherwise stated, the numerical range "a-b" represents a shorthand representation of any combination of real numbers between a and b, where a and b are both real numbers. For example, a numerical range of "0 to 5" indicates that all real numbers between "0 to 5" have been listed throughout this disclosure, and "0 to 5" is only a shorthand representation of the combination of these numbers.
In the present invention, all embodiments and preferred embodiments mentioned in the present invention can be combined with each other to form a new technical solution, unless otherwise specified.
In the present invention, all the technical features mentioned in the present invention and preferred features may be combined with each other to form a new technical solution, if not specifically stated.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying tables and examples. The following described embodiments are some, but not all embodiments of the present invention, and are merely illustrative of the present invention and should not be construed as limiting the scope of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
The embodiment provides an acid soaking stuck-releasing agent, wherein the acid soaking stuck-releasing agent comprises 15% of hydrochloric acid, 1.5% of corrosion inhibitor, 3% of HF acid, 1% of iron ion stabilizer, 5% of white oil and 74.5% of water in percentage by mass and volume;
wherein the corrosion inhibitor comprises 1% of span 80 and 0.5% of graphite powder by mass volume percentage concentration;
the iron ion stabilizer is oxalic acid;
the mass percentage concentration of the hydrochloric acid is 20%;
the mass percentage concentration of the HF acid is 40%;
the acid-soaking stuck releasing agent is obtained by uniformly mixing hydrochloric acid, a corrosion inhibitor, HF and an iron ion stabilizer in water in a stirring tank at normal temperature under the stirring condition and then adding white oil;
the density of the acid-soaking stuck-releasing agent provided by the embodiment is 1.09g/cm 3 。
Example 2
The embodiment provides a pickling and unfreezing agent, wherein the pickling and unfreezing agent comprises 15% of hydrochloric acid, 1.5% of corrosion inhibitor, 3% of HF acid, 1% of iron ion stabilizer, 5% of white oil and 74.5% of water in percentage by mass and volume;
wherein the corrosion inhibitor comprises 1% of span 80 and 0.5% of graphite powder by mass volume percentage concentration;
the iron ion stabilizer is oxalic acid;
the mass percentage concentration of the hydrochloric acid is 15%;
the mass percentage concentration of the HF acid is 40%;
the acid-soaking and stuck-releasing agent is obtained by uniformly mixing hydrochloric acid, a corrosion inhibitor, HF and an iron ion stabilizer in water in a stirring tank under the conditions of normal temperature and stirring and then adding white oil;
this example showsThe density of the provided pickle acid stuck-releasing agent is 1.05g/cm 3 。
Example 3
The embodiment provides a method for releasing stuck by using the acid-soaking stuck-releasing agent provided in the embodiment 1, which is implemented by aiming at a MaHW6475 well drilled in a Ma18 well of a Mar oil field in a Kueer basin ai lake, and comprises the following steps:
the basic situation and the complicated occurrence process of the production wells MaHW6475 are shown in the following table 1.
TABLE 1
Aiming at the problem of sticking the card in the MaHW6475 well of the oil production well, the embodiment adopts acid soaking to release the card for treatment, and the detailed treatment process comprises the following steps:
connecting a top drive pump at 20 days 11/27 in 2020, normally pumping, setting the torque to be 18 KN.M, lifting 120T with a knob without twisting, lowering to the original suspension weight of 110T, and releasing the torque; setting the torque to be 25 KN.M without twisting off, lifting up 120T with the torque, lowering to the original hanging weight, releasing the torque, lifting up 160T without twisting off, setting the torque to be 30 KN.M again without twisting off, lifting up 120T with the torque, lowering to the original hanging weight, releasing the torque, connecting a drill rod and setting the torque to be 35 KN.M, lifting up 120T with the torque, pressing down to 60T without twisting off, releasing the torque, and lifting up to 180T without twisting off.
And then, establishing measures, planning acid soaking, organizing construction measures during the stuck freeing agent: reducing the discharge capacity to 10L/L, carrying out torque 30 KN.M per hour, pressing down the movable drilling tool, lowering the movable drilling tool for 10T each time, standing for 10min, lowering the movable drilling tool for 40T at the lowest, releasing the torque after half hour, hanging the movable drilling tool for 150T at the maximum, standing for 10min, lowering the movable drilling tool for 80T, lifting the movable drilling tool for 140T, standing for 10min, lowering the movable drilling tool for 90T, lifting the movable drilling tool for 130T, standing for 10min, and lowering the movable drilling tool for 100T. Lifting to the original hanging weight, adding a torque of 30KN & M, pressing down with the torque, and repeating the operation. By year 2020, 11, 28, 8. 18/11/28/2020, i.e. the pickle spotting stuck release agent provided in example 1, to the well, to completion of the 19,
the operation of injecting the foaming acid stuck freeing agent specifically comprises the following steps:
sequentially injecting a pad fluid of 1.6m 3 And acid-soaking stuck-releasing agent 7.5m 3 Postliquid 1.7m 3 And replacing pulp by 22m 3 ，
Wherein the front liquid and the back liquid are both isolation liquids, and the isolation liquids comprise 4 percent of sakaguchi pulp, 0.5 percent of xanthan gum, barite powder and water according to mass volume percentage concentration, wherein the dosage of the barite powder is used for adjusting the density of the isolation liquids to 1.75g/m 3 The method comprises the following steps of (1) taking;
the slurry is high-density potassium-calcium based polyurethane organic salt system slurry, and the designed density interval is 1.65-1.75g/cm 3 And the viscosity of the Marshall funnel is 60-70s, wherein the high-density potassium-calcium based polyamino organic salt system slurry comprises the following components in percentage by mass and volume: 4% of bentonite and 0.2% of Na 2 CO 3 0.3 percent of NaOH, 0.6 percent of medium molecular polymer fluid loss additive, 0.6 percent of high molecular polymer coating agent, 7 percent of KCl, 1 percent of amine inhibitor, 10 percent of organic salt, 0.2 to 0.5 percent of CaO, 2 to 3 percent of natural asphalt powder, 1 to 2 percent of superfine calcium carbonate, 2 percent of polyalcohol, 1 to 2 percent of liquid lubricant, 1 to 2 percent of solid lubricant, 2 percent of plugging agent while drilling, barite and water.
In the present example, each component used in the slurry was a conventional substance and was commercially available. For example, the organic salt and the polymeric alcohol can be respectively organic salt Weigh1 and polymeric alcohol PPGS-1, both of which are available from Beijing Peucan Kaoka technical development Co., ltd; the high molecular polymer coating agent can be PMHA-II produced by Clarity friend chemical plant; the amino inhibitor can be polyamine SMJA-1 for drilling fluid produced by Shandong Ke Runda Petroleum science and technology Limited; the medium molecular polymer fluid loss additive, the liquid lubricant, the solid lubricant and the plugging agent while drilling can be respectively medium molecular polymer fluid loss additive SP-8, liquid lubricant LU-99, solid lubricant LU-66 and plugging agent while drilling TP-2, all of which are purchased from Oze Korea company of Claritie;
and (4) to 20, lifting to the original hanging weight, adding a torque of 32KN & M, suddenly releasing the torque, releasing the drilling tool from stuck, and completing the operation of injecting the pickling and stuck releasing agent into the drilling tool from the 40.
Well leakage is treated by 29 days 8 after 11 months in 2020 (after the drilling tool is unlocked, the pump is started at 6L/S, leakage is 1 m) 3 When the liquid level of the well head is not seen, the pump is started and the suspension tank of the grouting pump is 3.6m 3 The ground slurry is fully filled, the outlet flow is small, and 20m of the plugging slurry is prepared to reach 21 3 The mass volume percentage concentration of the plugging agent while drilling is 10 percent, and the intermittent hanging tank added plugging slurry is used for realizing the accumulative slurry filling of 12.3m 3 Pumping the slurry into a pump with a pump opening ratio of 6L/S to stop leakage and pumping the slurry into a pump with a pump opening ratio of 3.2m 3 Returning the outlet, and if the outlet is lost, the normal circulation cannot be established, and drilling by opening a pump and reaming;
and 8, 11, 29, 00, reaming to 4400 meters, and accumulating lost drilling fluid of 42m 3 ；
Wherein the composition of the ground slurry is the same as that of the high-density potassium-calcium-based polyamino organic salt system slurry;
the plugging slurry comprises the following components in percentage by mass and volume: 4% of bentonite, 0.2% of Na 2 CO 3 0.3 percent of NaOH, 0.6 percent of medium molecular polymer fluid loss additive, 0.6 percent of high molecular polymer coating agent, 7 percent of KCl, 1 percent of amine inhibitor, 10 percent of organic salt, 0.2 to 0.5 percent of CaO, 2 to 3 percent of natural asphalt powder, 1 to 2 percent of superfine calcium carbonate, 2 percent of polyalcohol, 1 to 2 percent of liquid lubricant, 1 to 2 percent of solid lubricant, 10 percent of plugging agent while drilling, barite and water.
In the present embodiment, each component used in the leakage blocking slurry is a conventional substance, and can be obtained commercially. For example, the organic salt and the polymeric alcohol can be respectively organic salt Weigh1 and polymeric alcohol PPGS-1, both of which are available from Beijing Pekan Kaokai technology development Co., ltd; the high molecular polymer coating agent can be PMHA-II produced by Clarity friend chemical plant; the amino inhibitor can be polyamine SMJA-1 for drilling fluid produced by Shandong Ke Runda Petroleum science and technology Limited; the medium molecular polymer fluid loss additive, the liquid lubricant, the solid lubricant and the plugging while drilling agent can be respectively medium molecular polymer fluid loss additive SP-8, liquid lubricant LU-99, solid lubricant LU-66 and plugging while drilling agent TP-2, all of which are purchased from Oze worker Ma Duty company, clarity City).
In this embodiment, the complexity loss time is 36h.
Example 4
The embodiment provides a method for releasing the oil well MaHW6296 well drilled by aiming at a Mar 18 well region in a Kuermbasin mugwort lake oil field, which is realized by using the acid-soaking stuck-releasing agent provided in the embodiment 1 and the embodiment 2, and comprises the following steps:
the basic situation and the complex generation process of the MaHW6296 well are shown in the following table 2.
TABLE 2
Aiming at the problems of drill sticking and drill breakage of a MaHW6296 well in a production well, the embodiment adopts acid soaking to release the drill sticking, and the detailed treatment process comprises the following steps:
and in 2020, 6, 26, 22 3 The top drive stops working suddenly in the running process (when the top drive stops working, the torque is 17.3KN · m, the pump pressure is unchanged, and is still 26 MPa), the rotating speed of the drilling machine is adjusted to 0, the drilling machine is lifted up to 120T, the drilling machine is placed under the condition of clamping and is placed to the original hanging weight of 100T, the top drive is operated immediately, the rotating speed is set to 30r/min, the hole is cut back, and the top drive does not react. The site is immediately reported to the project department of Mar lake, and 23In the mode, the drilling tool is lifted to the maximum of 150T of the hanging weight, and is lowered to the original hanging weight of 100T, and the discharge capacity is 16.3L/s. Gradually lifting up to the hanging weight of 190T by the indication of the post-Mar lake project department, and lowering to the hanging weight of 40T, wherein different lifting and lowering instructions are executed, lifting and lowering are invalid, different pump stroke cycles are invalid, the processing is complicated to 8 days 8 of 6 months and 27 days of 2020, and the cycle is completed, and the movable drilling tool waits for further measures of the project department.
In 2020, 6 months and 28 days 00 3 Oil-based stuck freeing agent with Ma' S funnel viscosity of 120S (8 m) 3 1, the well cementation pump truck is 0.5m in length 3 The oil-based stuck freeing agent is pumped in by the delivery rate of 8m per minute 3 And after the stuck freeing agent is pumped in the step 1 3 The pumping density of the pump at the discharge rate of/min is 1.65g/cm 3 Spacer fluid 3m of Ma' S funnel viscosity 65S 3 (the concentration of the mass volume percent of the isolation solution comprises 4 percent of sakaguchi slurry, 0.5 percent of xanthan gum, barite powder and water, and the density of the isolation solution is 1.75g/m 3 ) 1, 50 at 0.7m 3 Min displacement pump-in oil-based stuck freeing agent 18.5m 3 And 6m of annular oil-based stuck freeing agent 3 The oil-based stuck freeing agent in the drilling tool is 2m 3 And stopping the pump, moving the drilling tool up and down every 30min, starting the pump and jacking once every 120min, and stopping the pump when slurry returns. And (3) lifting the drilling tool at the speed of 11, lifting the drilling tool at different time intervals of 160-200T, lowering the drilling tool until different time intervals of 60-80T are reached, lifting and lowering the drilling tool are ineffective, lifting the drilling tool until the original hanging weight (100T) is lifted to 12, taking slips, removing the top drive, rotating the rotary table to 35 circles, enabling the torque to reach 25KN m, waiting for 30min, and not releasing the slips. And releasing the torque, lifting the suspended weight to 160T on the top-connected drive movable drilling tool, and lowering the suspended weight to 80T. And (4) jacking once every 120min to obtain the finished product after pulp returning. And (3) 15 days to 28, detaching the top drive, connecting a cement head, starting a pump, and jacking once every 120min until slurry returns.
And (3) after 8, 8 at 29 th 6 th 21 st.
And lifting the original hanging weight by 100T, releasing the torque of the drilling tool to 0, setting the torque to 30 KN.m, rotating for 40 circles, holding the torque for 5 minutes, then putting the drilling tool to the hanging weight for 30T, not releasing the clamping, lifting the drilling tool to the original hanging weight of 100T, and putting the drilling tool to the hanging weight for 30T. And (4) when the stuck object is not released, lifting the drilling tool to 120T of the suspended weight, and lowering the drilling tool to 30T of the suspended weight, wherein when the stuck object is not released, the drilling tool is released to 17.
And immediately releasing the torque, lifting the drilling tool to the hanging weight of 180T, lowering the drilling tool to the hanging weight of 30T, lifting the drilling tool to the original hanging weight of 100T, and lowering the drilling tool to the hanging weight of 60T without releasing the clamp.
Lifting the drilling tool 200T until 10 is not unlocked, lowering the drilling tool to the original hanging weight of 100T, rotating the top drive by 42 circles until the torque reaches 32KN · m, lowering the drilling tool to the hanging weight of 30T, and releasing the torque to 0 without unlocking. And establishing circulation by later establishing measures, re-injecting the oil-based stuck freeing agent, starting a pump for circulation, performing small-displacement circulation, gradually increasing the displacement to 10L/s and pumping the oil-based stuck freeing agent at the pressure of 14MPa, and increasing the displacement to 16L/s and pumping the oil-based stuck freeing agent at the pressure of 25MPa after circulating for 90 minutes, wherein the drilling tool is moved in the period.
And (3) circulating the movable drilling tool to 21, setting the top drive torque to 35KN m, lifting the drilling tool to the original hanging weight, rotating for 46 circles, holding the torque for 5 minutes, then descending the hanging weight for 30T, and circulating the movable drilling tool.
Wherein the oil-based stuck freeing agent comprises 18 percent of solid stuck freeing agent RH, 63 percent of diesel oil, 7 percent of rapid penetration agent (rapid T) and 12 percent of water in percentage by mass and volume, and the density of the oil-based stuck freeing agent is 1.60g/cm by adjusting the adding amount of the barite 3 . Wherein, the solid stuck freeing agent RH and the fast penetrating agent (fast T) are both purchased from Oze Kovar, inc. of Clarity.
6/2020, 30/30, 00, with a pumping density of 1.56g/cm 3 The March funnel viscosity is 124S, the oil-based stuck freeing agent is used at 33, the slurry is replaced at 19, the oil-based stuck freeing agent well section is estimated to be 3244-4979m (the open hole section is completely sealed), 7.5 parts are reserved in the drilling tool, the drilling tool is used once in 2-3 hours, and the pump is stopped when the slurry is returned from the outlet;
wherein the slurry is high-density potassium-calcium based polyurethane organic salt system slurry, and the designed density interval is 1.65-1.75g/cm 3 And the viscosity of the Marshall funnel is 60-70s, wherein the high-density potassium-calcium based polyurethane organic salt system slurry comprises the following components in percentage by mass and volume: 4 percent of bentonite,0.2% of Na 2 CO 3 0.3 percent of NaOH, 0.6 percent of medium molecular polymer fluid loss additive, 0.6 percent of high molecular polymer coating agent, 7 percent of KCl, 1 percent of amine inhibitor, 10 percent of organic salt, 0.2 to 0.5 percent of CaO, 2 to 3 percent of natural asphalt powder, 1 to 2 percent of superfine calcium carbonate, 2 percent of polyalcohol, 1 to 2 percent of liquid lubricant, 1 to 2 percent of solid lubricant, 2 percent of plugging agent while drilling, barite and water.
In the present example, each component used in the slurry was a conventional substance and was commercially available. For example, the organic salt and the polymeric alcohol can be respectively organic salt Weigh1 and polymeric alcohol PPGS-1, both of which are available from Beijing Peucan Kaoka technical development Co., ltd; the high molecular polymer coating agent can be PMHA-II produced by Clarity friend chemical plant; the amino inhibitor can be polyamine SMJA-1 for drilling fluid produced by Shandong Ke Runda Petroleum science and technology Limited; the medium molecular polymer fluid loss additive, the liquid lubricant, the solid lubricant and the plugging agent while drilling can be respectively medium molecular polymer fluid loss additive SP-8, liquid lubricant LU-99, solid lubricant LU-66 and plugging agent while drilling TP-2, all of which are purchased from Oze Korea company of Claritie City.
7, setting the top drive torque to be 20KN m, lifting a drilling tool to the original hanging weight of 100T, turning the top drive for 30 circles, setting the torque to be 20KN m, lowering the drilling tool to the hanging weight of 30T without releasing the clamping, lifting the drilling tool to the hanging weight of 130T, lowering the drilling tool to the hanging weight of 30T, pressing down and standing still (the drilling tool is not released by multiple times of moving), lifting the drilling tool to the hanging weight of 100T, releasing the torque to 0, and moving the drilling tool.
10, lifting the drilling tool to 180T of the hanging weight, lowering the drilling tool to 100T of the original hanging weight, setting the torque of the top drive to 25KN · m, rotating the top drive for 36 circles until the torque reaches 25KN · m, lowering the drilling tool to 40T of the hanging weight without releasing the clamping, and pressing down and standing.
12, lifting the drilling tool to the suspended weight of 100T, releasing the torque, lifting the drilling tool to 160T, and lowering the drilling tool to the suspended weight of 40T, wherein the drilling tool is not unlocked and is moved.
13, lifting the steel pipe 20 to 100T of the suspended weight, lifting the steel pipe to 180T again, lowering the steel pipe to 100T, setting the torque to 25KN · m, rotating the steel pipe for 35 circles, setting the torque to 25KN · m, lowering the steel pipe to 40T of the suspended weight, and pressing the steel pipe to be static.
14, lifting the drilling tool 100T, releasing the torque, lifting 180T, pressing down 40T, setting the torque to be 30KN m, lifting to the suspended weight 100T, jacking and rotating for 42 circles, lifting to 110T, lowering to 40T without releasing the clamping, lifting the drilling tool to the suspended weight 100T, releasing the torque, lowering to 40T, and pressing down and standing still.
15. Then the bottle is lifted up by 180T and is lowered to 40T. And lifting and lowering the movable drilling tool, and adding torque and pressing to be static. Repeated every 1h.
Setting the top drive torque to 20KN m, lifting a drilling tool to 100T of the original hanging weight, turning the top drive for 30 circles, enabling the torque to reach 20KN m, lowering the drilling tool to 30T of the hanging weight without releasing the clamping, lifting the drilling tool to 150T of the hanging weight, lowering the drilling tool to 40T of the hanging weight, pressing down and standing still (the drilling tool is not released by moving for multiple times), lifting the drilling tool to 100T of the hanging weight, and releasing the torque to 0 and moving the drilling tool by using the following steps of (8).
11, lifting the drilling tool to 180T of the hanging weight, lowering the drilling tool to 100T of the original hanging weight, setting the torque of the top drive to 25KN · m, rotating the top drive for 36 circles until the torque reaches 25KN · m, lowering the drilling tool to 40T of the hanging weight without releasing the clamping, and pressing down and standing the drilling tool.
12, lifting the drilling tool to the suspended weight of 100T, releasing the torque, lifting the drilling tool to 160T, and lowering the drilling tool to the suspended weight of 40T, wherein the drilling tool is not unlocked and is moved.
13, lifting the steel pipe 20 to 100T of the suspended weight, lifting the steel pipe to 180T again, lowering the steel pipe to 100T, setting the torque to 25KN · m, rotating the steel pipe for 35 circles, setting the torque to 25KN · m, lowering the steel pipe to 40T of the suspended weight, and pressing the steel pipe to be static.
14, lifting the drilling tool 100T, releasing the torque, lifting 170T, pressing down 50T, setting the torque to be 30KN m, lifting to the suspended weight 100T, jacking and rotating for 42 circles, lifting to 110T, lowering to 40T without releasing the clamping, lifting the drilling tool to the suspended weight 100T, releasing the torque, lowering to 40T, and pressing down and standing still.
And continuously executing the measures, lifting and lowering the movable drilling tool, and adding torque and pressing to be static. Repeated every 1h.
Repeating the technical measures at an interval of 1h after 7 months, 2 days and 8 days in 2020. And (4) continuing to move the drilling tool up and down, wherein the foam oil-based stuck freeing agent is used as a main material.
Wherein, the oil-based stuck freeing agent comprises 18 percent of solid stuck freeing agent RH, 63 percent of diesel oil, 7 percent of rapid penetrating agent (rapid T) and 12 percent of water in percentage by mass and volume, and the density of the oil-based stuck freeing agent is 1.56g/cm by adjusting the adding amount of barite 3 . Wherein, the solid stuck freeing agent RH and the fast penetrating agent (fast T) are both purchased from Oze Kovar, inc. of Clarity.
And 12, 7, month 2, lifting 30 to the original hanging weight of 100T, releasing the torque to 0, lifting a drilling tool to 204T, lowering to 60T, lifting to 210T, lowering to the hanging weight of 40T, lifting the drilling tool to the hanging weight of 220T, standing for 2min, lowering to the original hanging weight of 100T, setting the torque to 35KN · m, rotating a top driver for 50 circles, setting the torque to 35KN · m, lowering to the hanging weight of 40T, standing for 1h, and not unfreezing.
13, lifting a drilling tool to a suspended weight of 100T, releasing the torque to 0, lifting to a suspended weight of 144T, lowering to a suspended weight of 40T, lifting the drilling tool to a suspended weight of 100T, setting the torque to 25KN · m, carrying out top drive rotation for 34 circles, enabling the torque to reach 25KN · m, lowering the drilling tool to a suspended weight of 40T, pressing down and standing without releasing the drilling tool.
15, lifting the drilling tool to the hanging weight of 100T, releasing the torque to 0, and moving the drilling tool.
17, lifting the drilling tool to 180T of the hanging weight, lowering the drilling tool to 100T of the original hanging weight, setting the torque of the top drive to 25KN · m, rotating the top drive for 36 circles until the torque reaches 25KN · m, lowering the drilling tool to 40T of the hanging weight without releasing the clamping, and pressing down and standing.
18.
19, lifting the steel pipe 50 to 100T of the suspended weight, lifting the steel pipe to 180T again, lowering the steel pipe to 100T, setting the torque to 25KN · m, rotating for 35 circles, setting the torque to 25KN · m, lowering the steel pipe to 40T of the suspended weight, and pressing and standing the steel pipe.
21.
The measures are implemented according to the following steps of 2020, 7, 3 and 00, a drilling tool is moved, the drilling tool is pressed downwards with torque, the pressing is static, and the interval is 1h.
9, lifting the steel pipe to an original hanging weight of 100T, releasing the torque to 0, lifting a drilling tool to 160T, lifting the steel pipe to 60T, lifting the steel pipe to 180T, lowering the steel pipe to a hanging weight of 40T, lifting the drilling tool to a hanging weight of 170T, standing for 2min, lowering the steel pipe to the original hanging weight of 100T, setting the torque to 25KN · m, rotating the top to drive the steel pipe for 35 circles, setting the torque to 25KN · m, lowering the steel pipe to the hanging weight of 40T, standing for 1h, and not releasing the stuck steel pipe.
10, lifting a drilling tool to a suspended weight of 100T, releasing the torque to 0, lifting to a suspended weight of 150T, lowering to a suspended weight of 40T, lifting the drilling tool to a suspended weight of 100T, setting the torque to 25KN · m, carrying out top drive rotation for 34 circles, enabling the torque to reach 25KN · m, lowering the drilling tool to a suspended weight of 40T, pressing down and standing without releasing the clamping.
11, lifting the drilling tool to the hanging weight of 100T, releasing the torque to 0, and moving the drilling tool.
Lifting to the original hanging weight of 100T at 16:00, and pumping by a slurry pump to obtain the slurry with the density of 1.62g/cm 3 A fore liquid with a Makino funnel viscosity of 115S (the fore liquid is a spacer liquid and comprises 4 percent of bentonite slurry, 0.5 percent of xanthan gum, barite powder and water according to mass volume percentage concentration, wherein the dosage of the barite powder is used for adjusting the density of the spacer liquid to 1.62g/m 3 Standard) 3m 3 The discharge capacity is 10L/s, the pump pressure is 6MPa, and then the pump is converted into a pump truck with the pump pressure of 0.5m 3 The pumping density of the pump at the discharge rate of/min is 0.89g/cm 3 10.8m of simple oil-based stuck freeing agent (which comprises 75 percent of diesel oil, 20 percent of fast T penetrant and 5 percent of lubricant in percentage by mass and volume) 3 Then the density is pumped by a slurry pump to be 1.62g/cm 3 Ma' S funnel viscosity is 2m of substituted thick liquid of 115S 3 And the early-stage discharge capacity is 13L/s, the later-stage discharge capacity is gradually increased to 17L/s, the pump pressure is 29.5MPa, and when the slurry replacement is finished by 17Twisting down, pressing down and standing (moving the drilling tool for multiple times during the period);
the slurry substitute is high-density potassium-calcium based polyamino organic salt system slurry, wherein the high-density potassium-calcium based polyamino organic salt system slurry comprises the following components in percentage by mass and volume: 4% of bentonite and 0.2% of Na 2 CO 3 0.3 percent of NaOH, 0.6 percent of medium molecular polymer fluid loss additive, 0.6 percent of high molecular polymer coating agent, 7 percent of KCl, 1 percent of amino inhibitor, 10 percent of organic salt, 0.2 to 0.5 percent of CaO, 2 to 3 percent of natural asphalt powder, 1 to 2 percent of superfine calcium carbonate, 2 percent of polyalcohol, 1 to 2 percent of liquid lubricant, 1 to 2 percent of solid lubricant, 2 percent of while-drilling plugging agent, barite and water.
In the present example, each component used in the slurry was a conventional substance and was commercially available. For example, the organic salt and the polymeric alcohol can be respectively organic salt Weigh1 and polymeric alcohol PPGS-1, both of which are available from Beijing Peucan Kaoka technical development Co., ltd; the high molecular polymer coating agent can be PMHA-II produced by Clarity friend chemical plant; the amino inhibitor can be polyamine SMJA-1 for drilling fluid produced by Shandong Ke Runda Petroleum science and technology Limited; the medium molecular polymer fluid loss additive, the liquid lubricant, the solid lubricant and the plugging agent while drilling can be respectively medium molecular polymer fluid loss additive SP-8, liquid lubricant LU-99, solid lubricant LU-66 and plugging agent while drilling TP-2, all of which are purchased from Oze Korea company of Claritie City.
And (3) lowering the suspended weight to the original suspended weight of 100T at the speed of 23, lifting a drilling tool to a lower drill of 204T, lifting the drilling tool to 215T, lifting the drilling tool to 225T, lowering the drilling tool to 80T, lifting the drilling tool to 230T, lowering the drilling tool to 100T, setting the torque to 35KN m, enabling the torque to reach 35KN m, lowering the suspended weight to 80T, standing and pressing down without releasing the stuck weight.
And 7, month, 4, day, 8 00.
Circulating to 17 3 And the Ma funnel is a pad fluid with the viscosity of 200S (the pad fluid is a spacer fluid and is measured by mass volume percentage concentration meter)Comprising 4% bentonite slurry, 0.5% xanthan gum, barite powder and water, wherein the barite powder is used in an amount to adjust the density of the spacer fluid to 1.62g/m 3 To give standard) 3m 3 After the pumping, the well cementation pump truck is changed to be used at 0.5m 3 The pumping density of the pump per minute is 1.05g/cm 3 EXAMPLE 2 Pickling stuck remover 8m 3 And then, 20, pumping the mixture into a density of 1.62g/cm by using a slurry pump 3 A postposition liquid with a Ma funnel viscosity of 200S (the postposition liquid is a spacer liquid and comprises 4 percent of bentonite slurry, 0.5 percent of xanthan gum, barite powder and water according to mass volume percentage concentration, wherein the dosage of the barite powder is used for adjusting the density of the spacer liquid to 1.62g/m 3 To give standard) 2m 3 The density of the subsequent replacement is 1.62g/cm 3 Slurry with a Ma funnel viscosity of 70S of 22.2m 3 And the displacement is 16L/s, the pump pressure is 25MPa, and when the displacement is finished to 19 3 6m in the annulus 3 Moving the drilling tool;
the slurry substitute is high-density potassium-calcium based polyamino organic salt system slurry, wherein the high-density potassium-calcium based polyamino organic salt system slurry comprises the following components in percentage by mass and volume: 4% of bentonite and 0.2% of Na 2 CO 3 0.3 percent of NaOH, 0.6 percent of medium molecular polymer fluid loss additive, 0.6 percent of high molecular polymer coating agent, 7 percent of KCl, 1 percent of amino inhibitor, 10 percent of organic salt, 0.2 to 0.5 percent of CaO, 2 to 3 percent of natural asphalt powder, 1 to 2 percent of superfine calcium carbonate, 2 percent of polyalcohol, 1 to 2 percent of liquid lubricant, 1 to 2 percent of solid lubricant, 2 percent of while-drilling plugging agent, barite and water.
In the present example, each component used in the slurry replacement was a conventional substance and was commercially available. For example, the organic salt and the polymeric alcohol can be respectively organic salt Weigh1 and polymeric alcohol PPGS-1, both of which are available from Beijing Peucan Kaoka technical development Co., ltd; the high molecular polymer coating agent can be PMHA-II produced by Clarity friend chemical plant; the amino inhibitor can be polyamine SMJA-1 for drilling fluid produced by Shandong Ke Runda Petroleum science and technology Limited; the medium molecular polymer fluid loss additive, the liquid lubricant, the solid lubricant and the plugging agent while drilling can be respectively medium molecular polymer fluid loss additive SP-8, liquid lubricant LU-99, solid lubricant LU-66 and plugging agent while drilling TP-2, all of which are purchased from Oze Korea company of Claritie City.
19, lifting the drilling tool to 180T of the hanging weight, lowering the drilling tool to 100T of the original hanging weight, setting the torque of the top drive to 25KN · m, rotating the top drive for 36 circles until the torque reaches 25KN · m, lowering the drilling tool to 40T of the hanging weight without releasing the clamping, and pressing down and standing.
20, lifting the drilling tool to the suspended weight of 100T, releasing the torque, lifting the drilling tool to 200T, and lowering the drilling tool to the suspended weight of 40T without releasing the drilling tool and moving the drilling tool.
20.
21.
21. And (3) lifting a drilling tool to the suspended weight of 100T, releasing the torque, lifting the drilling tool by 180T, lowering the drilling tool to the suspended weight of 100T, lifting the drilling tool to 190T, lowering the drilling tool to the suspended weight of 100T, lifting the drilling tool by 200T, and lowering the drilling tool to the suspended weight of 100T without releasing the clamping. Setting the torque to be 30KN m, rotating for 42 circles, setting the torque to be 30KN m, lowering to the suspended weight of 40T, and standing still (moving the drilling tool in the period).
By 2020, 7/5 am 2.
3, lifting the drilling tool to 200T, lowering the drilling tool to 100T, setting the torque to 25KN · m, rotating for 28.5 circles, enabling the torque to reach 25KN · m, and lowering the drilling tool to the suspended weight80T, the cycle is started. Using a slurry (i.e., the density shown in Table 2 is 1.65 g/cm) 3 Slurry with a mag funnel viscosity of 63S) was used for the first injection, and then the next injection of the foamy acid stuck remover was performed.
And 7, month, 6, day 8 and 00 in 2020, circulating, moving the drilling tool, treating the slurry and adjusting the performance of the slurry.
In this embodiment, the reason why the first injection of the acid-soaking stuck-releasing agent does not achieve stuck releasing may include: 1. the stuck point is not calculated accurately; 2. not accurately replacing the drilling section with the stuck well; 3. the amount of HF added to the pickle liquor may be insufficient.
7, 7 and 8, 00 cycles in 2020, and moves the drilling tool, processes the slurry, adjusts the slurry performance, organizes the stuck freeing agent to prepare a fifth time of soaking the stuck freeing agent, and executes related measures.
8 3 The pumping density at the discharge/min is 1.35g/cm 3 A pad fluid (the pad fluid is a spacer fluid and comprises 4 percent of bentonite slurry, 0.5 percent of xanthan gum, barite powder and water according to mass volume percentage concentration, wherein the dosage of the barite powder is used for adjusting the density of the spacer fluid to 1.35g/m 3 To give standard) 3m 3 To 9.40 and again at 0.5m 3 The pumping density of the pump at the output displacement per minute is 1.09g/cm 3 Acid soak stuck-releasing agent 12m provided in example 1 3 Then at 0.5m 3 The pumping density at the discharge/min is 1.35g/cm 3 A post-fluid (the post-fluid is a spacer fluid and comprises 4 percent of bentonite slurry, 0.5 percent of xanthan gum, barite powder and water by mass volume percentage concentration, wherein the dosage of the barite powder is used for adjusting the density of the spacer fluid to 1.35g/m 3 To) 2m 3 And, starting to replace the slurry by the slurry pump at 0.8m in the condition of 11 3 The discharge capacity per min, the pump pressure of 24MPa and the pump density of 1.62g/cm 3 20.5m of drilling fluid with 70S of March funnel viscosity 3 And finishing slurry replacement by 20 parts in the sequence from 12. Acid soaking stuck releasing agent 4m in drilling tool 3 Annular acid-soaking stuck-releasing agent 8m 3 Moving the drilling tool;
the slurry substitute is high-density calcium-potassium-based polyamino organic salt system slurry, wherein the high-density calcium-potassium-based polyamino organic salt system slurry comprises the following components in percentage by mass and volume: 4% of bentonite,0.2％Na 2 CO 3 0.3% NaOH, 0.6% medium molecular polymer fluid loss additive, 0.6% high molecular polymer coating agent, 7% KCl, 1% amine-based inhibitor, 10% organic salt, 0.2-0.5% CaO, 2-3% natural asphalt powder, 1-2% ultrafine calcium carbonate, 2% polyalcohol, 1-2% liquid lubricant, 1-2% solid lubricant, 2% plugging agent while drilling, barite and water.
12, lifting a drilling tool to 180T of the suspended weight, lowering the drilling tool to 40T, lifting the drilling tool to 190T of the suspended weight, lowering the drilling tool to 45T of the suspended weight, lifting the drilling tool to 100T of the suspended weight, setting the top drive torque to 25 KN.m, driving the top to rotate for 34 circles, enabling the torque to reach 25 KN.m, lowering the drilling tool to 40T of the suspended weight, pressing the drilling tool to be static without releasing the clamping (the drilling tool is moved for a plurality of times during the period, and the drilling tool with the torque is pressed to be static without releasing the clamping).
14, lifting a drilling tool to a suspended weight of 100T, lowering the drilling tool to a suspended weight of 50T, lifting the drilling tool to a suspended weight of 180T, lowering the drilling tool to a suspended weight of 40T, lifting the drilling tool to a suspended weight of 200T, lowering the drilling tool to a suspended weight of 50T, pressing down and standing still without releasing the drilling tool, lifting the drilling tool to a suspended weight of 220T, standing for 3min, and lowering the drilling tool to a suspended weight of 40T without releasing the drilling tool. And (3) lifting the drilling tool to 100T of the hanging weight, setting top drive torque of 35 KN.m, carrying out top drive rotation for 50 circles until the torque reaches 35 KN.m, lowering the drilling tool to 40T of the hanging weight, and pressing the drilling tool to be static without releasing the clamping (the drilling tool is moved for multiple times during the period, and is pressed to be static with the torque without releasing the clamping).
And lifting the drilling tool to the hanging weight 190T, lowering to 80T, lifting the drilling tool to the hanging weight 205T, lowering to the hanging weight 60T, and lifting the drilling tool to the hanging weight 210T (moving the drilling tool in the period) in the speed of 16.
And (3) lowering the drilling tool to the suspended weight of 100T at the speed of 16, setting the top drive torque to be 35KN · m, carrying out top drive rotation for 50 circles until the torque reaches 35KN · m, lowering the drilling tool to the suspended weight of 60T, and pressing down and standing still.
And 16, observing that the drilling tool rotates for 5 circles, the hanging weight rises to 70T, then lifting the drilling tool to 100T, the drilling tool rotates normally, the torque drops, the drilling tool returns to normal, the complexity is relieved, a cycle is established, and preparation before tripping is carried out.
In summary, in the present embodiment, sticking occurs from drilling at 22/21/26/4979 m in 2020 to 8/7/6/00 treatment of the stuck bit operation, the cumulative time is 9 days and 10 hours, and after the oil-based stuck release agent fails to release stuck for many times in the period, the acid-based stuck release agent is injected for the second time at 40/7/8/7/2020, and the stuck bit is released only for 8 hours at 16/pm.
It should be understood that the above description is only exemplary of the invention, and is not intended to limit the scope of the invention, so that the replacement of equivalent elements or equivalent changes and modifications made in the present invention should be included within the scope of the present invention. In addition, the technical features and the technical inventions of the present invention, the technical features and the technical inventions, and the technical inventions can be freely combined and used.
Claims (10)
1. The pickling stuck releasing agent is characterized by comprising hydrochloric acid, a corrosion inhibitor, HF acid, an iron ion stabilizer, white oil and water;
wherein, the mass volume percentage concentrations of the hydrochloric acid, the corrosion inhibitor, the HF acid, the iron ion stabilizer, the white oil and the water are respectively 15-20%, 1.5-3%, 3-5%, 1-2%, 5-10% and 70-80%.
2. The pickle stuck freeing agent as claimed in claim 1, wherein the concentrations of hydrochloric acid, corrosion inhibitor, HF acid, iron ion stabilizer, white oil and water are 15%, 1.5%, 3%, 1%, 5% and 74.5% by mass/volume, respectively.
3. The pickle acid stuck freeing agent according to claim 1 or 2, wherein the corrosion inhibitor comprises span 80 and graphite powder;
preferably, the mass volume percentage concentration of the span 80 and the graphite powder is 1% and 0.5%, respectively;
also preferably, the iron ion stabilizer comprises oxalic acid;
also preferably, the mass percentage concentration of the hydrochloric acid is 5-20%;
also preferably, the HF acid concentration is 40% by mass;
also preferably, the density of the acid-soaking stuck-releasing agent is 1.05-1.18g/cm 3 。
4. A process for the preparation of the pakcet stuck remover according to any one of claims 1 to 3, characterized by comprising:
at normal temperature and under the stirring condition, hydrochloric acid, a corrosion inhibitor, HF acid and an iron ion stabilizer are uniformly mixed in water, and white oil is added to obtain the acid-soaking stuck remover.
5. A method for releasing the stuck substance by using the acid soaking, which is characterized by comprising the following steps:
sequentially injecting a pad fluid, the acid-soaking stuck-releasing agent as defined in any one of claims 1-3, a post fluid and a slurry substitute into a well in which stuck drill occurs;
preferably, the sticking well comprises a sticking vertical well, a high inclination directional well or a high displacement horizontal well.
6. The acid pickle stuck freeing method of claim 5, further comprising: injecting an oil-based stuck freeing agent into the well with stuck drill to free the stuck drill, and if the oil-based stuck freeing agent cannot be freed from the stuck drill after repeated injection for 2-10 times, then sequentially injecting a pad fluid, the acid soaking stuck freeing agent as claimed in any one of claims 1-3, a post fluid and a replacement slurry into the well with stuck drill.
7. The pickle acid stuck freeing method according to claim 5 or 6, wherein the number of times of the pickle acid stuck freeing agent repeated injection is 2-3 times;
preferably, within 72 hours of the well being stuck, injecting the pickle acid stuck freeing agent into the well being stuck for freeing;
it is also preferable that, when the injection of the bubble acid stuck remover is repeated, the previously injected bubble acid stuck remover is replaced and then the next injection of the bubble acid stuck remover is performed.
8. The method as claimed in claim 5 or 6, wherein the amount of the pickled stuck freeing agent is 6-12m 3 。
9. The acid-soaking stuck-freeing process according to claim 5 or 6, wherein the pre-solution and the post-solution are both spacer fluids, and comprise, by mass volume percentage concentration, 4-5% of sakaguchi slurry, 0.3-0.6% of xanthan gum, barite powder and water, wherein the dosage of the barite powder is used for adjusting the density of the spacer fluid to 1.30-1.75g/m 3 The standard is.
10. The acid soaking stuck freeing method of claim 5 or 6, wherein the slurry substitute is high density potassium calcium based polyurethane organic salt system slurry with the density of 1.60-1.75g/cm 3 And the viscosity of the Marshall funnel is 60-70s, wherein the high-density potassium-calcium based polyamino organic salt system slurry comprises the following components in percentage by mass and volume: 2-5% of bentonite and 0.2-0.3% of Na 2 CO 3 0.3-0.8% of NaOH, 0.6-1.5% of medium molecular polymer fluid loss additive, 0.3-0.8% of high molecular polymer coating agent, 7-8% of KCl, 0.5-1% of amine inhibitor, 10-20% of organic salt, 0.2-0.5% of CaO, 2-3% of natural asphalt powder, 1-2% of superfine calcium carbonate, 0.5-2% of polyalcohol, 1-2% of liquid lubricant, 1-2% of solid lubricant, 2-5% of plugging agent while drilling, barite and water;
preferably, the high-density kalium-calcium based polyamino organic salt system slurry comprises, in mass volume percentage concentration: 4% of bentonite and 0.2% of Na 2 CO 3 0.3 percent of NaOH, 0.6 percent of medium molecular polymer fluid loss additive, 0.6 percent of high molecular polymer coating agent, 7 percent of KCl, 1 percent of amino inhibitor, 10 percent of organic salt, 0.2 to 0.5 percent of CaO, 2 to 3 percent of natural asphalt powder, 1 to 2 percent of superfine calcium carbonate, 2 percent of polyalcohol, 1 to 2 percent of liquid lubricant, 1 to 2 percent of solid lubricant, 2 percent of while-drilling plugging agent, barite and water.
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