CN112322262A - Anti-drag anti-sticking drilling fluid and preparation method thereof - Google Patents
Anti-drag anti-sticking drilling fluid and preparation method thereof Download PDFInfo
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- 238000005553 drilling Methods 0.000 title claims abstract description 188
- 239000012530 fluid Substances 0.000 title claims abstract description 149
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 153
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 28
- 239000003831 antifriction material Substances 0.000 claims abstract description 25
- 239000000706 filtrate Substances 0.000 claims abstract description 25
- 230000001050 lubricating effect Effects 0.000 claims abstract description 24
- 239000004094 surface-active agent Substances 0.000 claims abstract description 21
- 239000004927 clay Substances 0.000 claims abstract description 20
- 239000003513 alkali Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000011259 mixed solution Substances 0.000 claims description 154
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 38
- 239000000314 lubricant Substances 0.000 claims description 30
- 239000002002 slurry Substances 0.000 claims description 22
- 239000002689 soil Substances 0.000 claims description 22
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 20
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 19
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 14
- 235000019738 Limestone Nutrition 0.000 claims description 12
- 239000006028 limestone Substances 0.000 claims description 12
- 229920000642 polymer Polymers 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 12
- 239000002253 acid Substances 0.000 claims description 10
- 239000000654 additive Substances 0.000 claims description 10
- 230000000996 additive effect Effects 0.000 claims description 10
- 239000010426 asphalt Substances 0.000 claims description 9
- 239000000440 bentonite Substances 0.000 claims description 9
- 229910000278 bentonite Inorganic materials 0.000 claims description 9
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 9
- 239000002480 mineral oil Substances 0.000 claims description 8
- 235000010446 mineral oil Nutrition 0.000 claims description 8
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 8
- 239000008158 vegetable oil Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 7
- 239000003995 emulsifying agent Substances 0.000 claims description 7
- 239000010439 graphite Substances 0.000 claims description 7
- 229910002804 graphite Inorganic materials 0.000 claims description 7
- 239000003077 lignite Substances 0.000 claims description 7
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 7
- 239000011324 bead Substances 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 3
- 230000001603 reducing effect Effects 0.000 abstract description 30
- 230000009286 beneficial effect Effects 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 4
- 239000003345 natural gas Substances 0.000 abstract description 2
- 239000003209 petroleum derivative Substances 0.000 abstract description 2
- 239000004576 sand Substances 0.000 description 11
- 238000001914 filtration Methods 0.000 description 8
- 230000002829 reductive effect Effects 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000005457 optimization Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 150000005846 sugar alcohols Polymers 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- QXJJQWWVWRCVQT-UHFFFAOYSA-K calcium;sodium;phosphate Chemical compound [Na+].[Ca+2].[O-]P([O-])([O-])=O QXJJQWWVWRCVQT-UHFFFAOYSA-K 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000011085 pressure filtration Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
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Classifications
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- 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
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
- C09K8/24—Polymers
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- 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
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
-
- 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
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/20—Natural organic compounds or derivatives thereof, e.g. polysaccharides or lignin derivatives
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- 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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
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- 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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
- C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
- C09K8/48—Density increasing or weighting additives
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- 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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
- C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
- C09K8/487—Fluid loss control additives; Additives for reducing or preventing circulation loss
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- 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
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- 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
- C09K2208/34—Lubricant additives
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Lubricants (AREA)
Abstract
The invention relates to the technical field of petroleum and natural gas drilling, in particular to a drag-reducing and anti-sticking drilling fluid and a preparation method thereof, wherein the raw materials of the drag-reducing and anti-sticking drilling fluid comprise a clay material, an alkali material, a filtrate reducer material, an anti-collapse material, a lubricating material, an anti-friction material, a surfactant material, a plugging material and a weighting material, and the preparation method comprises the following steps: sequentially adding a clay material, an alkali material, a filtrate reducer material, an anti-collapse material, a lubricating material, an anti-friction material, a surfactant material, a plugging material and a weighting material into clear water to prepare the anti-drag anti-seize drilling fluid. The preparation method is simple and convenient, the raw materials are easy to obtain, and the obtained anti-drag and anti-sticking drilling fluid can resist the drill sticking accident which may occur in the drilling process, has the temperature resistance of 180 ℃, has good lubricating property and higher plugging and fluid loss reducing effects, is beneficial to reducing friction and resistance, is beneficial to preventing the drill sticking and reducing the accident, is beneficial to improving the drilling speed, and is further beneficial to reducing the cost.
Description
Technical Field
The invention relates to the technical field of petroleum and natural gas drilling, in particular to a drag-reducing anti-sticking drilling fluid and a preparation method thereof.
Background
The drilling tool can be classified into differential pressure drilling tool (adhesion drilling tool), sand setting drilling tool, sand bridge drilling tool, well collapse drilling tool, reducing drilling tool, electric measurement drilling tool, falling object drilling tool and the like, and most drilling fluids have direct relation.
Differential sticking is most common. During drilling, when a section of drilling tool is in contact with the wall of a stratum well, the drilling tool is pressed and adhered to the wall of the well under the action of the pressure difference between the pressure in the well and the pressure in the stratum, and the drilling tool cannot move, namely, the drilling sticking occurs. The larger the pressure difference between the pressure in the well and the formation pressure is, the larger the adhesion force is, the larger the contact area between the drilling tool and the well wall is, the larger the adhesion force is, the larger the friction coefficient between the drilling tool and the well wall is, and the larger the adhesion force is, the longer the static time of the drilling tool on the well wall is, the more the drilling sticking is easy to occur. The probability of differential pressure sticking is higher in the directional well and the horizontal well. The drilling fluid is adjusted before entering the easily collapsed stratum, plugging treatment agents such as asphalt and the like are supplemented, the plugging capability of the drilling fluid on stratum bedding and microcracks is improved, and the entering of filtrate into the stratum is reduced. The dosage of the anti-sloughing treating agent is increased, and the anti-sloughing capability of the drilling fluid is improved. And selecting proper drilling fluid density according to the adjacent well information and pressure prediction, wherein the drilling fluid density is required to be greater than the stratum collapse pressure, so that the well wall is in a mechanical stable state. The filtration loss, especially the filtration loss under high temperature and high pressure, is strictly controlled, so that the filtrate is prevented from entering the stratum, and the hydration collapse is caused. A drilling fluid system with good compatibility with stratum is selected, so that good drilling fluid performance is maintained, and the mud cake has proper filtration loss, is thin and tough and has a lower mud cake friction coefficient; the content of harmful solid phase in the drilling fluid is reduced, the content of drilling cuttings in mud cakes is reduced, and the permeability of the mud cakes is reduced; adding a lubricant according to the requirement to improve the lubricity of the drilling fluid and mud cakes; once differential pressure sticking occurs, the drilling fluid can be treated by reducing the density of the drilling fluid, soaking and releasing the drilling fluid and passing clean water.
The sand setting drill sticking, when drilling fast or well flushing is not good, the annular space gathers and has a large amount of drill cuttings, if at this moment the drilling fluid viscosity, shear force are too low again, and suspension effect is not good, stops the pump suddenly in the drilling process, can have a large amount of drill cuttings to subside relatively fast, buries the drilling tool, causes the drill sticking. In addition, when a single joint or a stand column is connected, a large amount of drill cuttings settle to the bottom of the well, and the drill is lowered too fast to insert settled sand, so that drill clamping is caused. The sand bridge stuck drill, the easily collapsed stratum and the hard and soft stratum overlapped and interacted well diameter mutation well section (the sugarcoated haw well hole) often form a sand bridge at the transition position of the large and small well holes, and the sand bridge can be inserted into the following drilling too hard to cause the stuck drill. The good rheological property and the capability of carrying and suspending drill cuttings of the drilling fluid are maintained; reasonable annular hydraulic parameters (discharge capacity and upward return speed), effective work of the solid control equipment, timely removal of drill cuttings, guarantee of shaft and shaft bottom cleaning, and control of drilling speed; avoid the drill bit fixed point long-time circulation, form "big belly" or "sugarcoated haw" well hole. Once the sand setting or the sand bridge is stuck, the pump is strictly prohibited from being started with large displacement, or the drilling tool is rotated under hard pressure or forcibly under hard pressure by blind lifting, so that the sand setting and the sand bridge are squeezed more tightly, and even leakage and collapse are further caused.
The well collapse stuck drill is a drill stuck caused by sudden well collapse in the drilling process. Sudden well collapse may be due to a section of unstable borehole wall, or to a squeezing or pumping pressure agitation caused by the drilling tool being lifted or lowered too quickly and violently, or to a violent impact against the borehole wall. The collapsed mass is then large. The drilling tool is suddenly dropped due to more quantity, and the drilling tool is clamped. It features quick and sudden generation, difficult pump opening and blocked drilling tool. The well collapse prevention stuck drill is mainly used for improving the stability of a well wall, controlling the density of drilling fluid properly, increasing the dosage of an anti-collapse treatment agent in an easily-formed stratum section and improving the anti-collapse capability of a system.
The drilling fluid performance has a large relationship with electrical measurements. The drilling fluid has good performance, and the formed mud cake is compact, thin and tough, thereby being beneficial to the electric measurement; the drilling fluid has good lubricity, so that the friction force of the electrical measuring instrument on a well wall is reduced, and the lowering and lifting of the electrical measuring instrument are facilitated; the drilling fluid has low filtration loss, a weak thick mud cake is not easy to form in a sandstone well section with good permeability, the friction force cannot be increased, and meanwhile, the drilling fluid is good, so that the stability of a well wall can be ensured, and the probability of forming a sugarcoated haw well hole is reduced. The stratum which is easy to collapse is easy to form a big-belly borehole, so that an electrical logging instrument cannot be smoothly put into the borehole; the diameter-reducing stratum causes the borehole to become small, and the electrical measuring instrument is stopped when being lowered to the positions and is lifted up to meet the card; in the electrical measurement process of some relatively soft stratums, the cable is easy to pull out of the groove, and the key groove is deep after a long time, so that the cable is easy to clamp.
Drilling fluid lubricants and drag reducing agents can generally be classified into two broad categories, namely liquid and solid. The former such as mineral oil, vegetable oil, surfactant, etc.; such as graphite, plastic spheres, glass spheres, and the like. In recent years, inert solid lubricants are the fastest-developing drilling fluid lubricant varieties, and extreme pressure lubricants and environmentally-friendly nontoxic lubricants which play a role under high load are mainly developed in liquid lubricants; the amount of the asphalt lubricant used is reduced year by year for environmental protection reasons.
The lubricant or the drag reducer can be used independently to achieve the effects of improving mud cakes, reducing friction, reducing resistance, improving lubricity, improving stability of a well wall and the like, the application methods are large in difference and limited in effect aiming at different conditions, and other processors are required to be used in a matched mode, so that the overall performance of the drilling fluid is optimized, and the purposes of reducing drag, reducing friction and preventing blockage are achieved.
Disclosure of Invention
The invention provides a drag-reducing anti-sticking drilling fluid and a preparation method thereof, overcomes the defects of the prior art, and can effectively solve the problems of insufficient and thick mud cakes, large friction, high resistance, poor lubricity and poor well wall stability of the existing drilling fluid.
One of the technical schemes of the invention is realized by the following measures: the drilling fluid comprises, by mass, 2-6 parts of clay material, 1-2 parts of alkali material, 10-20 parts of filtrate reducer material, 2-6 parts of anti-collapse material, 2-6 parts of lubricating material, 1-4 parts of antifriction material, 0.5-1 part of surfactant material, 2-6 parts of plugging material and 12-70 parts of weighting material, and is prepared by the following method: firstly, adding a required amount of clay material into clear water to prepare soil slurry; secondly, adding required amount of alkali materials into the soil slurry to prepare a first mixed solution; thirdly, adding a required amount of fluid loss additive material into the first mixed solution to prepare a second mixed solution; fourthly, adding a required amount of anti-collapse material into the second mixed solution to prepare a third mixed solution; fifthly, adding a required amount of lubricating material into the third mixed solution to prepare a fourth mixed solution; sixthly, adding the required amount of antifriction material into the fourth mixed solution to prepare a fifth mixed solution; step seven, adding a required amount of surfactant material into the fifth mixed solution to prepare a sixth mixed solution; eighthly, adding a required amount of plugging material into the sixth mixed solution to prepare a seventh mixed solution; and step nine, adding a required amount of weighting material into the seventh mixed solution to prepare the anti-drag anti-seize drilling fluid.
The following is a further optimization or/and improvement of one of the above-mentioned technical solutions of the invention:
the clay material is bentonite for drilling fluid; or/and the alkali material is more than one of sodium carbonate and sodium hydroxide; or/and the filtrate reducer material is more than one of a sulfonated filtrate reducer for drilling fluid and a lignite filtrate reducer for drilling fluid; or/and the anti-collapse material is more than one of polymer anti-collapse agents for drilling fluid and asphalt anti-collapse agents for drilling fluid; or/and the lubricating material is more than one of mineral oil type lubricant for drilling fluid and vegetable oil type lubricant for drilling fluid; or/and the antifriction material is more than one of a high-efficiency antifriction agent for drilling fluid, graphite for drilling fluid and floating bead inert solid lubricant; or/and the surfactant material is more than one of emulsifier for drilling fluid and polymer alcohol for drilling fluid; or/and the plugging material is superfine calcium carbonate; or/and the weighting material is more than one of barite powder and limestone powder.
The granularity of the superfine calcium carbonate is 600 meshes to 2000 meshes.
The superfine calcium carbonate is soaked in 15 wt% hydrochloric acid at 30 deg.c for 24 hr to reach acid dissolving rate over 95 wt%.
The limestone powder is soaked in 15 wt% hydrochloric acid at 30 ℃ for 24h, and the acid solubility is more than 95 wt%.
The second technical scheme of the invention is realized by the following measures: a preparation method of the anti-drag anti-seize drilling fluid is prepared according to the following steps: firstly, adding a required amount of clay material into clear water to prepare soil slurry; secondly, adding required amount of alkali materials into the soil slurry to prepare a first mixed solution; thirdly, adding a required amount of fluid loss additive material into the first mixed solution to prepare a second mixed solution; fourthly, adding a required amount of anti-collapse material into the second mixed solution to prepare a third mixed solution; fifthly, adding a required amount of lubricating material into the third mixed solution to prepare a fourth mixed solution; sixthly, adding the required amount of antifriction material into the fourth mixed solution to prepare a fifth mixed solution; step seven, adding a required amount of surfactant material into the fifth mixed solution to prepare a sixth mixed solution; eighthly, adding a required amount of plugging material into the sixth mixed solution to prepare a seventh mixed solution; and step nine, adding a required amount of weighting material into the seventh mixed solution to prepare the anti-drag anti-seize drilling fluid.
The following is further optimization or/and improvement of the second technical scheme of the invention:
the clay material is bentonite for drilling fluid; or/and the alkali material is more than one of sodium carbonate and sodium hydroxide; or/and the filtrate reducer material is more than one of a sulfonated filtrate reducer for drilling fluid and a lignite filtrate reducer for drilling fluid; or/and the anti-collapse material is more than one of polymer anti-collapse agents for drilling fluid and asphalt anti-collapse agents for drilling fluid; or/and the lubricating material is more than one of mineral oil type lubricant for drilling fluid and vegetable oil type lubricant for drilling fluid; or/and the antifriction material is more than one of a high-efficiency antifriction agent for drilling fluid, graphite for drilling fluid and floating bead inert solid lubricant; or/and the surfactant material is more than one of emulsifier for drilling fluid and polymer alcohol for drilling fluid; or/and the plugging material is superfine calcium carbonate; or/and the weighting material is more than one of barite powder and limestone powder.
The granularity of the superfine calcium carbonate is 600 meshes to 2000 meshes.
The superfine calcium carbonate is soaked in 15 wt% hydrochloric acid at 30 deg.c for 24 hr to reach acid dissolving rate over 95 wt%.
The limestone powder is soaked in 15 wt% hydrochloric acid at 30 ℃ for 24h, and the acid solubility is more than 95 wt%.
The preparation method is simple and convenient, the raw materials are easy to obtain, and the obtained anti-drag and anti-sticking drilling fluid can resist the drill sticking accident which may occur in the drilling process, has the temperature resistance of 180 ℃, has good lubricating property and higher plugging and fluid loss reducing effects, is beneficial to reducing friction and resistance, is beneficial to preventing the drill sticking and reducing the accident, is beneficial to improving the drilling speed, and is further beneficial to reducing the cost.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention. The various chemical reagents and chemicals mentioned in the present invention are all well known and commonly used in the art, unless otherwise specified.
The invention is further described below with reference to the following examples:
example 1: the anti-drag anti-seize drilling fluid comprises, by mass, 2-6 parts of clay material, 1-2 parts of alkali material, 10-20 parts of filtrate reducer material, 2-6 parts of anti-collapse material, 2-6 parts of lubricating material, 1-4 parts of antifriction material, 0.5-1 part of surfactant material, 2-6 parts of plugging material and 12-70 parts of weighting material, and is prepared according to the following method: firstly, adding a required amount of clay material into clear water to prepare soil slurry; secondly, adding required amount of alkali materials into the soil slurry to prepare a first mixed solution; thirdly, adding a required amount of fluid loss additive material into the first mixed solution to prepare a second mixed solution; fourthly, adding a required amount of anti-collapse material into the second mixed solution to prepare a third mixed solution; fifthly, adding a required amount of lubricating material into the third mixed solution to prepare a fourth mixed solution; sixthly, adding the required amount of antifriction material into the fourth mixed solution to prepare a fifth mixed solution; step seven, adding a required amount of surfactant material into the fifth mixed solution to prepare a sixth mixed solution; eighthly, adding a required amount of plugging material into the sixth mixed solution to prepare a seventh mixed solution; and step nine, adding a required amount of weighting material into the seventh mixed solution to prepare the anti-drag anti-seize drilling fluid.
The drag-reducing anti-sticking drilling fluid product disclosed by the invention can resist the temperature of 180 ℃, has the effects of reducing friction, reducing resistance, improving lubricity and preventing sticking, and can be used in high-temperature deep well water-based drilling fluid.
In the invention, the clay material is mainly used for providing viscosity and shearing force, ensuring rock carrying and suspension capacity, forming mud cakes and reducing filtration loss; the alkali material is mainly used for adjusting the pH value of the drilling fluid to promote the performance of the anti-drag anti-seize drilling fluid, promote clay dispersion and improve mud cakes; the fluid loss additive material is mainly used for reducing the fluid loss and improving mud cakes; the anti-collapse material is mainly used for inhibiting and plugging, stabilizing a well wall, improving mud cakes and reducing the filtration loss; the lubricating material is mainly used for reducing friction and resistance and improving the extreme pressure lubricating performance under high load; the antifriction material is mainly used for reducing friction, reducing resistance and improving drilling speed; the surfactant material is mainly used for improving the stability of the drilling fluid, promoting the performance of the lubricant and the antifriction agent, improving mud cakes and reducing the filtration loss; the plugging material is mainly used for improving mud cakes and reducing the filtration loss; the weighting material is mainly used for ensuring the density of the drilling fluid and preventing well collapse and differential pressure drill sticking. The above materials are all known or commercially available products.
Example 2: the anti-drag anti-seize drilling fluid comprises, by mass, 2 parts or 6 parts of clay materials, 1 part or 2 parts of alkali materials, 10 parts or 20 parts of filtrate reducer materials, 2 parts or 6 parts of anti-collapse materials, 2 parts or 6 parts of lubricating materials, 1 part or 4 parts of anti-friction materials, 0.5 part or 1 part of surfactant materials, 2 parts or 6 parts of plugging materials and 12 parts or 70 parts of weighting materials, and is prepared by the following method: firstly, adding a required amount of clay material into clear water to prepare soil slurry; secondly, adding required amount of alkali materials into the soil slurry to prepare a first mixed solution; thirdly, adding a required amount of fluid loss additive material into the first mixed solution to prepare a second mixed solution; fourthly, adding a required amount of anti-collapse material into the second mixed solution to prepare a third mixed solution; fifthly, adding a required amount of lubricating material into the third mixed solution to prepare a fourth mixed solution; sixthly, adding the required amount of antifriction material into the fourth mixed solution to prepare a fifth mixed solution; step seven, adding a required amount of surfactant material into the fifth mixed solution to prepare a sixth mixed solution; eighthly, adding a required amount of plugging material into the sixth mixed solution to prepare a seventh mixed solution; and step nine, adding a required amount of weighting material into the seventh mixed solution to prepare the anti-drag anti-seize drilling fluid.
Example 3: as the optimization of the embodiment, the clay material is bentonite for drilling fluid; or/and the alkali material is more than one of sodium carbonate and sodium hydroxide; or/and the filtrate reducer material is more than one of a sulfonated filtrate reducer for drilling fluid and a lignite filtrate reducer for drilling fluid; or/and the anti-collapse material is more than one of polymer anti-collapse agents for drilling fluid and asphalt anti-collapse agents for drilling fluid; or/and the lubricating material is more than one of mineral oil type lubricant for drilling fluid and vegetable oil type lubricant for drilling fluid; or/and the antifriction material is more than one of a high-efficiency antifriction agent for drilling fluid, graphite for drilling fluid and floating bead inert solid lubricant; or/and the surfactant material is more than one of emulsifier for drilling fluid and polymer alcohol for drilling fluid; or/and the plugging material is superfine calcium carbonate; or/and the weighting material is more than one of barite powder and limestone powder.
Example 4: as optimization of the above embodiment, the ultrafine calcium carbonate particle size is 600 mesh to 2000 mesh.
Example 5: as optimization of the above embodiment, the superfine calcium carbonate is soaked in 15 wt% hydrochloric acid at 30 ℃ for 24h, and the acid solubility is more than 95 wt%.
Example 6: as optimization of the above embodiment, the limestone powder is soaked in 15 wt% hydrochloric acid at 30 ℃ for 24h, and the acid solubility is more than 95 wt%.
Example 7: the preparation method of the anti-drag anti-seize drilling fluid is prepared according to the following steps: firstly, adding a required amount of clay material into clear water to prepare soil slurry; secondly, adding required amount of alkali materials into the soil slurry to prepare a first mixed solution; thirdly, adding a required amount of fluid loss additive material into the first mixed solution to prepare a second mixed solution; fourthly, adding a required amount of anti-collapse material into the second mixed solution to prepare a third mixed solution; fifthly, adding a required amount of lubricating material into the third mixed solution to prepare a fourth mixed solution; sixthly, adding the required amount of antifriction material into the fourth mixed solution to prepare a fifth mixed solution; step seven, adding a required amount of surfactant material into the fifth mixed solution to prepare a sixth mixed solution; eighthly, adding a required amount of plugging material into the sixth mixed solution to prepare a seventh mixed solution; and step nine, adding a required amount of weighting material into the seventh mixed solution to prepare the anti-drag anti-seize drilling fluid.
Example 8: the anti-drag anti-seize drilling fluid is prepared by the following method: firstly, adding 60g of bentonite into clear water to prepare soil slurry; secondly, adding 15g of sodium carbonate into the soil slurry to prepare a first mixed solution; step three, adding 150g of sulfonated fluid loss additive for drilling fluid into the first mixed solution to prepare a second mixed solution; fourthly, adding 30g of polymer anti-sloughing agent for drilling fluid into the second mixed solution to prepare a third mixed solution; fifthly, adding 20g of mineral oil lubricant for drilling fluid into the third mixed solution to prepare a fourth mixed solution; sixthly, adding 10g of the high-efficiency friction reducer for the drilling fluid into the fourth mixed solution to prepare a fifth mixed solution; seventhly, adding 5g of emulsifier for drilling fluid into the fifth mixed solution to prepare a sixth mixed solution; eighthly, adding 30g of superfine calcium carbonate into the sixth mixed solution to prepare a seventh mixed solution; and ninth, adding 360g of barite powder into the seventh mixed solution to prepare the drag-reducing and anti-sticking drilling fluid.
Example 9: the anti-drag anti-seize drilling fluid is prepared by the following method: firstly, adding 50g of bentonite into clear water to prepare soil slurry; secondly, adding 15g of sodium hydroxide into the soil slurry to prepare a first mixed solution; step three, adding 150g of lignite filtrate reducer for drilling fluid into the first mixed solution to prepare a second mixed solution; fourthly, adding 30g of asphalt anti-sloughing agent for drilling fluid into the second mixed solution to prepare a third mixed solution; fifthly, adding 30g of vegetable oil lubricant for drilling fluid into the third mixed solution to prepare a fourth mixed solution; sixthly, adding 20g of graphite for drilling fluid into the fourth mixed solution to prepare a fifth mixed solution; seventhly, adding 5g of polyalcohol for drilling fluid into the fifth mixed solution to prepare a sixth mixed solution; eighthly, adding 30g of superfine calcium carbonate into the sixth mixed solution to prepare a seventh mixed solution; and step nine, adding 600g of limestone powder into the seventh mixed solution to prepare the drag-reducing anti-sticking drilling fluid.
Example 10: the anti-drag anti-seize drilling fluid is prepared by the following method: firstly, adding 50g of bentonite into clear water to prepare soil slurry; secondly, adding 10g of sodium carbonate into the soil slurry to prepare a first mixed solution; step three, adding 200g of sulfonated fluid loss additive for drilling fluid into the first mixed solution to prepare a second mixed solution; fourthly, adding 50g of polymer anti-sloughing agent for drilling fluid into the second mixed solution to prepare a third mixed solution; fifthly, adding 40g of mineral oil lubricant for drilling fluid into the third mixed solution to prepare a fourth mixed solution; sixthly, adding 30g of the high-efficiency friction reducer for the drilling fluid into the fourth mixed solution to prepare a fifth mixed solution; seventhly, adding 10g of emulsifier for drilling fluid into the fifth mixed solution to prepare a sixth mixed solution; eighthly, adding 50g of superfine calcium carbonate into the sixth mixed solution to prepare a seventh mixed solution; and ninthly, adding 970g of barite powder into the seventh mixed solution to prepare the drag-reducing and anti-sticking drilling fluid.
Example 11: the anti-drag anti-seize drilling fluid is prepared by the following method: firstly, adding 40g of bentonite into clear water to prepare soil slurry; secondly, adding 11g of sodium hydroxide into the soil slurry to prepare a first mixed solution; step three, adding 200g of lignite filtrate reducer for drilling fluid into the first mixed solution to prepare a second mixed solution; fourthly, adding 50g of asphalt anti-sloughing agent for drilling fluid into the second mixed solution to prepare a third mixed solution; fifthly, adding 50g of vegetable oil lubricant for drilling fluid into the third mixed solution to prepare a fourth mixed solution; sixthly, adding 40g of floating bead inert solid lubricant into the fourth mixed solution to prepare a fifth mixed solution; seventhly, adding 10g of polyalcohol for drilling fluid into the fifth mixed solution to prepare a sixth mixed solution; eighthly, adding 50g of superfine calcium carbonate into the sixth mixed solution to prepare a seventh mixed solution; and ninthly, adding 1400g of limestone powder into the seventh mixed solution to prepare the drag-reducing and anti-sticking drilling fluid.
The drag-reducing and anti-sticking drilling fluids obtained according to the embodiments 8 to 11 are subjected to thermal rolling aging for 16 hours at the temperatures of 120 ℃, 140 ℃, 160 ℃ and 180 ℃, performance tests are carried out, the density, the low-temperature and low-pressure filtration loss, the mud cake thickness, the mud cake viscosity coefficient, the extreme pressure lubrication performance and the anti-wear pressure are measured, and the test results are shown in table 1, wherein samples of blank 1, blank 2, blank 3 and blank 4 in table 1 are drilling fluid samples corresponding to the embodiment 8, the embodiment 9, the embodiment 10 and the embodiment 11 without adding a lubricant, a friction reducer and a surfactant. As can be seen from the data in Table 1, under the conditions of the same density and aging temperature, the mud cake viscosity coefficient and the extreme pressure lubrication coefficient of the samples in the examples are lower, the anti-wear pressure is higher, the effects of obviously reducing friction, reducing resistance and improving lubricity are achieved, the aging temperature is as high as 180 ℃, and the drilling fluid can still be controlled to keep better lubricating property.
In conclusion, the preparation method is simple and convenient, the raw materials are easy to obtain, and the obtained anti-drag and anti-sticking drilling fluid can resist temperature of 180 ℃ aiming at possible sticking accidents in the drilling process, has good lubricating property and higher plugging and fluid loss reducing effects, is beneficial to reducing friction and resistance, is beneficial to preventing sticking and reducing accidents, is beneficial to improving the drilling speed and further is beneficial to reducing the cost.
The technical characteristics form an embodiment of the invention, which has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (10)
1. The drag-reduction anti-sticking drilling fluid is characterized by comprising, by mass, 2 to 6 parts of clay material, 1 to 2 parts of alkali material, 10 to 20 parts of filtrate reducer material, 2 to 6 parts of anti-collapse material, 2 to 6 parts of lubricating material, 1 to 4 parts of antifriction material, 0.5 to 1 part of surfactant material, 2 to 6 parts of plugging material and 12 to 70 parts of weighting material, and the drilling fluid is prepared by the following method: firstly, adding a required amount of clay material into clear water to prepare soil slurry; secondly, adding required amount of alkali materials into the soil slurry to prepare a first mixed solution; thirdly, adding a required amount of fluid loss additive material into the first mixed solution to prepare a second mixed solution; fourthly, adding a required amount of anti-collapse material into the second mixed solution to prepare a third mixed solution; fifthly, adding a required amount of lubricating material into the third mixed solution to prepare a fourth mixed solution; sixthly, adding the required amount of antifriction material into the fourth mixed solution to prepare a fifth mixed solution; step seven, adding a required amount of surfactant material into the fifth mixed solution to prepare a sixth mixed solution; eighthly, adding a required amount of plugging material into the sixth mixed solution to prepare a seventh mixed solution; and step nine, adding a required amount of weighting material into the seventh mixed solution to prepare the anti-drag anti-seize drilling fluid.
2. The drag-reducing and anti-seize drilling fluid according to claim 1, characterized in that the clay material is bentonite for drilling fluid; or/and the alkali material is more than one of sodium carbonate and sodium hydroxide; or/and the filtrate reducer material is more than one of a sulfonated filtrate reducer for drilling fluid and a lignite filtrate reducer for drilling fluid; or/and the anti-collapse material is more than one of polymer anti-collapse agents for drilling fluid and asphalt anti-collapse agents for drilling fluid; or/and the lubricating material is more than one of mineral oil type lubricant for drilling fluid and vegetable oil type lubricant for drilling fluid; or/and the antifriction material is more than one of a high-efficiency antifriction agent for drilling fluid, graphite for drilling fluid and floating bead inert solid lubricant; or/and the surfactant material is more than one of emulsifier for drilling fluid and polymer alcohol for drilling fluid; or/and the plugging material is superfine calcium carbonate; or/and the weighting material is more than one of barite powder and limestone powder.
3. The drag-reducing anti-seize drilling fluid according to claim 2, characterized in that the ultrafine calcium carbonate particle size is 600 to 2000 mesh.
4. The drag-reducing anti-seize drilling fluid according to claim 2 or 3, characterized in that the ultrafine calcium carbonate is soaked with 15% wt hydrochloric acid at 30 ℃ for 24h, and the acid solubility is more than 95% wt.
5. The drag-reducing and anti-seize drilling fluid according to claim 2, 3 or 4, characterized in that limestone powder is soaked with 15% wt hydrochloric acid at 30 ℃ for 24h, and the acid solubility is more than 95% wt.
6. The preparation method of the drag-reducing and anti-sticking drilling fluid according to claim 1, which is characterized by comprising the following steps: firstly, adding a required amount of clay material into clear water to prepare soil slurry; secondly, adding required amount of alkali materials into the soil slurry to prepare a first mixed solution; thirdly, adding a required amount of fluid loss additive material into the first mixed solution to prepare a second mixed solution; fourthly, adding a required amount of anti-collapse material into the second mixed solution to prepare a third mixed solution; fifthly, adding a required amount of lubricating material into the third mixed solution to prepare a fourth mixed solution; sixthly, adding the required amount of antifriction material into the fourth mixed solution to prepare a fifth mixed solution; step seven, adding a required amount of surfactant material into the fifth mixed solution to prepare a sixth mixed solution; eighthly, adding a required amount of plugging material into the sixth mixed solution to prepare a seventh mixed solution; and step nine, adding a required amount of weighting material into the seventh mixed solution to prepare the anti-drag anti-seize drilling fluid.
7. The preparation method of the drag-reducing and anti-sticking drilling fluid according to claim 6, characterized in that the clay material is bentonite for drilling fluid; or/and the alkali material is more than one of sodium carbonate and sodium hydroxide; or/and the filtrate reducer material is more than one of a sulfonated filtrate reducer for drilling fluid and a lignite filtrate reducer for drilling fluid; or/and the anti-collapse material is more than one of polymer anti-collapse agents for drilling fluid and asphalt anti-collapse agents for drilling fluid; or/and the lubricating material is more than one of mineral oil type lubricant for drilling fluid and vegetable oil type lubricant for drilling fluid; or/and the antifriction material is more than one of a high-efficiency antifriction agent for drilling fluid, graphite for drilling fluid and floating bead inert solid lubricant; or/and the surfactant material is more than one of emulsifier for drilling fluid and polymer alcohol for drilling fluid; or/and the plugging material is superfine calcium carbonate; or/and the weighting material is more than one of barite powder and limestone powder.
8. The preparation method of the drag-reducing and anti-seizing drilling fluid according to claim 7, wherein the particle size of the ultrafine calcium carbonate is 600 to 2000 meshes.
9. The preparation method of the drag-reducing and anti-sticking drilling fluid according to claim 7 or 8, characterized in that the ultrafine calcium carbonate is soaked with 15% wt hydrochloric acid at 30 ℃ for 24h, and the acid solubility is more than 95% wt.
10. The preparation method of the drag-reducing and anti-sticking drilling fluid according to claim 7, 8 or 9, characterized in that limestone powder is soaked with 15% wt hydrochloric acid at 30 ℃ for 24h, and the acid solubility is more than 95% wt.
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