CN112576227A - Long-acting augmented injection method for water injection well of ultra-low permeability reservoir - Google Patents
Long-acting augmented injection method for water injection well of ultra-low permeability reservoir Download PDFInfo
- Publication number
- CN112576227A CN112576227A CN202011345171.XA CN202011345171A CN112576227A CN 112576227 A CN112576227 A CN 112576227A CN 202011345171 A CN202011345171 A CN 202011345171A CN 112576227 A CN112576227 A CN 112576227A
- Authority
- CN
- China
- Prior art keywords
- water
- water injection
- injection well
- pressure
- ultra
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002347 injection Methods 0.000 title claims abstract description 149
- 239000007924 injection Substances 0.000 title claims abstract description 149
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 112
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000035699 permeability Effects 0.000 title claims abstract description 22
- 230000003190 augmentative effect Effects 0.000 title claims abstract description 19
- 239000003814 drug Substances 0.000 claims abstract description 68
- 239000002270 dispersing agent Substances 0.000 claims abstract description 12
- 239000002738 chelating agent Substances 0.000 claims abstract description 11
- 239000002280 amphoteric surfactant Substances 0.000 claims abstract description 10
- 239000002904 solvent Substances 0.000 claims abstract description 8
- 239000000080 wetting agent Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 239000007864 aqueous solution Substances 0.000 claims description 18
- PEDCQBHIVMGVHV-UHFFFAOYSA-N glycerol group Chemical group OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 12
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 claims description 11
- KWIUHFFTVRNATP-UHFFFAOYSA-O N,N,N-trimethylglycinium Chemical compound C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 claims description 11
- 229960003237 betaine Drugs 0.000 claims description 11
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 8
- -1 octadecyl propyl Chemical group 0.000 claims description 8
- 239000004094 surface-active agent Substances 0.000 claims description 8
- 239000004480 active ingredient Substances 0.000 claims description 5
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 claims description 4
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical group OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 claims description 4
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical group CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 claims description 4
- 229920000570 polyether Polymers 0.000 claims description 4
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 4
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 4
- 229920002503 polyoxyethylene-polyoxypropylene Polymers 0.000 claims description 4
- 230000002950 deficient Effects 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 229940079593 drug Drugs 0.000 claims description 3
- 238000009424 underpinning Methods 0.000 claims description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 15
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 8
- 238000011161 development Methods 0.000 abstract description 8
- 238000012360 testing method Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 4
- 239000002332 oil field water Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000005303 weighing Methods 0.000 description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 239000009096 changqing Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000003381 solubilizing effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- 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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
-
- 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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
-
- 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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/588—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific polymers
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
The invention relates to the technical field of oilfield water injection development, in particular to a long-acting augmented injection method for a water injection well of an ultra-low permeability reservoir, which adopts a local pressurization augmented injection mode to ensure that water is injected into a water injection well which is still ineffective after multiple measures are implemented, and then adds a comprehensive pressure control medicament according to the pressure rise amplitude of the water injection well to ensure that the water injection well can stably inject water for a long time. The invention also provides the raw material composition of the comprehensive pressure control medicament, which comprises 10 percent of amphoteric surfactant, 12 percent to 15 percent of stripping dispersant, 20 percent to 24 percent of chelating agent, 15 percent to 18 percent of wetting agent, 8 percent to 12 percent of solubilizer and the raw material compositionThe balance being water. Under the addition concentration of 0.2%, the performance of the medicament test is as follows: the pH value is 6.0, the calcium carbonate scale stripping rate is 88.7 percent, the surface tension is 25.2N/mN, and the interfacial tension is 3.5 multiplied by 10‑2N/mN, the corrosion rate is only 0.049 mm/year. The method is better applied to the field and is an effective means for solving the problem of ineffective wells with multiple measures in the ultra-low permeability reservoir.
Description
Technical Field
The invention relates to the technical field of oilfield flooding development, in particular to a long-acting injection increasing method for an ultra-low permeability reservoir water injection well.
Background
The Changqing oil field belongs to low-porosity and low-permeability characteristics, along with continuous development, a reservoir development object is gradually changed from a low-permeability reservoir to an ultra-low-permeability reservoir, the development difficulty is gradually increased, more than 90% of development modes are water injection development, the water injection has the problem of insufficient injection, and the main reasons are caused by factors such as poor reservoir physical property, scaling in a near wellbore zone, incompatibility of injected water and formation water and the like. The method is characterized in that measures are taken to increase injection aiming at the problem of insufficient injection of a water well, the main injection increasing mode mainly comprises acidification as a main measure and acid fracturing and fracturing measures as an auxiliary measure, but the effect on part of blocks is not obvious, the problems of short effective period and low effective rate of the measures exist, and the reservoir layer has secondary damage. Meanwhile, the cost of the injection increasing measure is high, and the damage to the reservoir is large after multiple measures are taken, so that the efficient development of the oil reservoir is not facilitated. The difficulty in treating the ineffective water short injection well with the increased injection by multiple measures is high, the production yield of surrounding oil wells is influenced, the treatment cost is high, and the effective period is shorter and shorter along with the increase of the times of the measures.
Therefore, in order to solve the problem of ineffective short injection wells in multiple measures and injection increase in the prior art, the invention provides a long-acting injection increase method for an ultra-low permeability reservoir water injection well.
Disclosure of Invention
The invention overcomes the defects of the prior art, provides a long-acting injection increasing method for an ultra-low permeability reservoir water injection well, and particularly increases the pressure of the incoming water through a pressurizing device to ensure that the water well can inject the water, and adds a comprehensive pressure control medicament in different ways according to different conditions of each well to achieve the purpose of stably injecting the water into the water injection well for a long time.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
a long-acting augmented injection method for water injection well of ultra-low permeability reservoir includes the following steps
S001, selecting a short water injection well which is subjected to multiple times of measures before multiple openings and is still under-injected;
s002, injecting water into the water-deficient injection well, pressurizing the water injected by the water injection by adopting a pressurizing device, and adding a comprehensive pressure control medicament;
s003, according to the pressure rise range of the under-injection well, proportioning the comprehensive pressure control medicament aqueous solution with the required concentration, injecting the aqueous solution mixed with the comprehensive pressure control medicament after pressurization into the selected under-injection well, wherein the injection displacement of the pressurization device is 100m3D to 300m3And d, the supercharging amplitude is less than or equal to 10 MPa.
Further, for the water-poor injection well with the early-stage pressure-rise amplitude of less than 2MPa in the S003, continuously adding a comprehensive pressure-control agent aqueous solution with the mass concentration of 0.1% for 6 months; for the under-injection well with the pressure rise amplitude of 2MPa to 4MPa, pulse type comprehensive pressure control medicament aqueous solution with the mass concentration of 0.2 percent is selected for 1 to 2 months; for the under-injection well with the pressure rise amplitude of more than 4MPa, the comprehensive pressure control medicament aqueous solution with the mass concentration of 0.3 percent is added for one time for 1 month.
Further, in the step S003, when the injection displacement of the supercharging device is changed from 100m3D to 300m3And when the pressure is/d, the number of the injected underpinning wells is 3-7.
Furthermore, the pressurizing device comprises a centrifugal pressurizing water injection pump and a dosing device, the centrifugal pressurizing water injection pump and the dosing device are integrally skid-mounted on the same skid seat, and a water outlet pipeline of the centrifugal pressurizing water injection pump and a drug outlet pipeline of the dosing device are converged and then are led into the undercjection well.
Furthermore, the centrifugal booster water injection pump adopts a centrifugal booster water injection pump with the inlet pressure of 15-20 MPa, the outlet pressure of 25-30 MPa, the medium temperature of less than or equal to 80 ℃, the power voltage of 380 +/-5% V and the frequency of 50 Hz.
Further, charge device for adding the medicinal cupping, be provided with stirred tank, the jar body, pressure sensor in adding the medicinal cupping, the play medicine mouth of adding the medicinal cupping is provided with the diaphragm measurement plunger pump that is used for controlling comprehensive accuse pressure medicament addition volume, add the concentration ratio of adding comprehensive accuse pressure medicament according to needs at first and add required comprehensive accuse pressure medicament volume and add into adding the medicinal cupping, diaphragm metering pump control adds the medicine flow, synthesize accuse pressure medicament and mix at the export of centrifugal pressure boost water injection pump with the injected water after the pressure boost, along with pouring into the single well of short notes in the water distribution room, guarantee the water injection well can stabilize the water injection for a long time through adding for a long time.
Further, the raw materials of the comprehensive pressure control medicament in the S002 comprise, by mass percent of 100%, 10% of amphoteric surfactant, 12% to 15% of stripping dispersant, 20% to 24% of chelating agent, 15% to 18% of wetting agent, 8% to 12% of solubilizer and the balance of water.
Further, the amphoteric surfactant is mainly a betaine surfactant, the betaine surfactant is octadecyl propyl hydroxysultaine, and the effective content of the betaine is 40%.
Furthermore, the stripping dispersant is polyamino polyether methylene phosphonic acid, and the content of the effective component of the stripping dispersant is 60%.
Further, the chelating agent is nitrilotriacetic acid, and the content of the effective component of the chelating agent is 99%.
Further, the wetting agent is glycerol polyoxyethylene ether GE-8, the content of the effective component is 99%, and the hydroxyl value is 350-420.
Furthermore, the solubilizer is nonylphenol polyoxyethylene polyoxypropylene ether NPE-108, the content of active ingredients is 99%, and the HLB value is 10-11.
The invention has the beneficial effects that:
compared with the prior art, when multiple injection wells are subjected to multiple times of measures before selection, a plurality of under-injection wells which are closely spaced are selected, and then a pressurizing device is adopted to uniformly pressurize the incoming water and add a comprehensive pressure control medicament; finally, injecting the water mixed with the comprehensive pressure control medicament after pressurization into the selected multi-hole underinjection well, wherein the injection displacement of the pressurization device is controlled to be 100m3D to 300m3During injection, 3-7 under-injection wells can be managed generally, the maximum pressure increase amplitude can reach 10MPa, secondary pressure increase is carried out on high-pressure incoming water through a centrifugal pressure-increasing water injection pump in the method, the pressure increase amplitude is controllable and adjustable, stable adding concentration of added comprehensive medicaments is guaranteed, the centrifugal pressure-increasing water injection pump is adopted, operation is stable, maintenance workload is small, the centrifugal pressure-increasing water injection pump and a medicament adding device are integrally skid-mounted on the same skid seat and operate in a split mode, field installation is easy, operation is simple and convenient, overall operation is convenient, the adding concentration of the adopted comprehensive pressure-controlling medicaments is low, and the situation that the pressure of the under-injection wells is not greatly increased in the long-term water injection process can be guaranteed.
Detailed Description
The following will describe a scheme of the long-acting augmented injection method for an injection well of an ultra-low permeability reservoir provided by the embodiment of the invention in detail through several specific embodiments.
Example 1:
a long-acting augmented injection method for water injection well of ultra-low permeability reservoir includes the following steps
S001, selecting a short water injection well which is subjected to multiple times of measures before multiple openings and is still under-injected;
s002, injecting water into the water-deficient injection well, pressurizing the water injected by the water injection by adopting a pressurizing device, and adding a comprehensive pressure control medicament;
s003, according to the pressure rise range of the under-injection well, proportioning the comprehensive pressure control medicament aqueous solution with the required concentration, injecting the aqueous solution mixed with the comprehensive pressure control medicament after pressurization into the selected under-injection well, wherein the injection displacement of the pressurization device is 100m3D to 300m3And d, the supercharging amplitude is less than or equal to 10 MPa.
Further, for the water-poor injection well with the early-stage pressure-rise amplitude of less than 2MPa in the S003, continuously adding a comprehensive pressure-control agent aqueous solution with the mass concentration of 0.1% for 6 months; for the under-injection well with the pressure rise amplitude of 2MPa to 4MPa, pulse type comprehensive pressure control medicament aqueous solution with the mass concentration of 0.2 percent is selected for 1 to 2 months; for the under-injection well with the pressure rise amplitude of more than 4MPa, the comprehensive pressure control medicament aqueous solution with the mass concentration of 0.3 percent is added for one time for 1 month.
Further, in the step S003, when the injection displacement of the supercharging device is changed from 100m3D to 300m3And when the pressure is/d, the number of the injected underpinning wells is 3-7.
When multiple injection wells are selected and increased by adopting multiple times of measures before injection, a plurality of under-injection wells which are closely spaced are selected, and then a pressurizing device is adopted to uniformly pressurize the incoming water and add comprehensive pressure control medicaments; finally, injecting the water mixed with the comprehensive pressure control medicament after pressurization into the selected multi-hole underinjection well, wherein the injection displacement of the pressurization device is controlled by 100m3D to 300m3When the pressure is increased to 5 times, the effect after the injection is increased is the best.
According to the pressure-boosting amplitude of the early-stage under-injection well, the invention also determines the adding modes of the concentration ratio of the three comprehensive pressure-control medicaments, and selects and continuously adds the comprehensive pressure-control medicament aqueous solution with the mass concentration of 0.1 percent for 6 months for the under-injection well with the early-stage pressure-boosting amplitude of less than 2 MPa; for the under-injection well with the pressure rise amplitude of 2MPa to 4MPa, pulse type comprehensive pressure control medicament aqueous solution with the mass concentration of 0.2 percent is selected for 1 to 2 months; for the under-injection well with the boosting amplitude of more than 4MPa, the comprehensive pressure control medicament aqueous solution with the mass concentration of 0.3 percent is added for 1 month at one time, so that different comprehensive pressure control medicament concentration adding modes are selected according to different boosting amplitudes of the wellhead of the early-stage injection well, and the purpose of stably injecting water into the under-injection well for a long time is further ensured.
Example 2:
furthermore, the pressurizing device comprises a centrifugal pressurizing water injection pump and a dosing device, the centrifugal pressurizing water injection pump and the dosing device are integrally skid-mounted on the same skid seat, and a water outlet pipeline of the centrifugal pressurizing water injection pump and a drug outlet pipeline of the dosing device are converged and then are led into the under-injection well.
Furthermore, the centrifugal booster water injection pump adopts a centrifugal booster water injection pump with the inlet pressure of 15-20 MPa, the outlet pressure of 25-30 MPa, the medium temperature of less than or equal to 80 ℃, the power voltage of 380 +/-5% V and the frequency of 50 Hz.
Further, charge device for adding the medicinal cupping, be provided with stirred tank, the jar body, pressure sensor in adding the medicinal cupping, the medicine outlet of adding the medicinal cupping is provided with the diaphragm measurement plunger pump that is used for controlling comprehensive accuse pressure medicament addition volume, add the volume of required comprehensive accuse pressure medicament into adding the medicinal cupping according to the required concentration ratio of throwing comprehensive accuse pressure medicament at first during the medicine, diaphragm metering pump control adds the medicine flow, synthesize accuse pressure medicament and mix at the export of centrifugal pressure boost water injection pump with the injected water after the pressure boost, pour into the single well of short notes along with the water distribution room, throw and ensure that the water injection well can stabilize the water injection for a long time through for a long time. The centrifugal booster water injection pump is used for carrying out secondary pressure increase on high-pressure incoming water, the pressure increase amplitude is controllable and adjustable, and the stable adding concentration of the added comprehensive medicament is ensured.
In the above embodiment, the pressurizing capacity is 10MPa, and the daily rated water injection amount is 150m3The booster pump is characterized in that a centrifugal booster water injection pump is adopted, the inlet pressure is 15-20 MPa, the outlet pressure is 25-30 MPa, the medium temperature is less than or equal to 80 ℃, the power voltage is 380 +/-5% V, and the frequency is 50Hz, the booster pump is stable to operate and small in maintenance workload, the centrifugal booster water injection pump and a dosing device are integrally skid-mounted on the same skid seat and are operated in a split mode, the booster pump is easy to install on site and convenient to operate, the dosing device is a dosing tank, a 1-party dosing tank is usually adopted, a stirring kettle, a tank body and a pressure sensor are arranged in the dosing tank, a motor of the stirring kettle is a motor with the rotating speed of 60r/min, and the motor can adjust the rotating speed by using a frequency converter according to the use condition.
The rotating speed of the motor of the stirring kettle in the embodiment is 60r/min, the rotating speed can be adjusted by using a frequency converter according to the use condition, the flow of a diaphragm metering plunger pump is 100L/h, the power is 5.5kW, the lift is 30MPa, the efficiency is 86% ", and the adding amount of the comprehensive medicament can be adjusted according to different concentrations of the comprehensive medicament to be added, so that the comprehensive medicament and water added by a centrifugal booster water injection pump are mixed to reach the required concentration.
Example 3:
further, the raw materials of the comprehensive pressure control medicament in the S002 comprise, by mass percent of 100%, 10% of amphoteric surfactant, 12% to 15% of stripping dispersant, 20% to 24% of chelating agent, 15% to 18% of wetting agent, 8% to 12% of solubilizer and the balance of water.
Furthermore, the amphoteric surfactant is mainly a betaine surfactant, the betaine surfactant is octadecyl propyl hydroxysulfobetaine, and the effective content of the betaine is 40%.
Furthermore, the stripping dispersant is polyamino polyether methylene phosphonic acid, and the content of the effective component of the stripping dispersant is 60%.
Further, the chelating agent is nitrilotriacetic acid, and the content of the effective component of the chelating agent is 99%.
Further, the wetting agent is glycerol polyoxyethylene ether GE-8, the content of the effective component is 99%, and the hydroxyl value is 350-420.
Furthermore, the solubilizer is nonylphenol polyoxyethylene polyoxypropylene ether NPE-108, the content of active ingredients is 99%, and the HLB value is 10-11.
In the above embodiment, the amphoteric surfactant is mainly a betaine surfactant, the betaine surfactant is octadecyl propyl hydroxysultaine, the effective content of the betaine is 40%, the amphoteric surfactant has good cleaning, foaming and conditioning effects, and the amphoteric surfactant has good compatibility with anionic, cationic and nonionic surfactants. And soaking, permeating and stripping the crude oil in the oil-containing slurry to improve the recovery ratio of the third recovery.
The stripping dispersant is polyamino polyether methylene phosphonic acid, the content of active ingredients of the stripping dispersant is 60%, and the molecular weight is about 500. Scale crystals formed by dispersing inorganic scales such as calcium carbonate, calcium sulfate and the like can be stripped.
The chelating agent is nitrilotriacetic acid with the molecular weight of 191 and the content of 99 percent, can quickly form a stable complex with calcium, magnesium, barium, strontium and other ions in the injected water, effectively eliminates a blockage formed by carbonate and sulfate in a stratum, and achieves the purposes of removing the blockage of a near-wellbore area and preventing secondary precipitation.
The wetting agent is glycerol polyoxyethylene ether GE-8, the content is 99%, the hydroxyl value is 350-420, and the foam stabilizing, wetting, penetrating, lubricating, solubilizing and moisturizing capabilities are excellent.
The solubilizer is nonylphenol polyoxyethylene polyoxypropylene ether NPE-108, has the content of 99 percent and the HLB value of 10-11, has good emulsifying, cleaning and penetrating abilities and good low-temperature fluidity, and can effectively improve the solubility of the organic plug in water.
The test performance of the comprehensive pressure control medicament disclosed by the invention is as follows under the condition that the adding mass concentration of the comprehensive pressure control medicament is 0.1 percent: the pH value is 6.5, the calcium carbonate scale stripping rate is 86.2 percent, the surface tension is 26.7N/mN, and the interfacial tension is 7.8 multiplied by 10-2N/mN, the corrosion rate is only 0.047 mm/year.
The test performance of the comprehensive pressure control medicament disclosed by the invention is as follows under the condition that the adding mass concentration of the comprehensive pressure control medicament is 0.2 percent: the pH value is 6.0, the calcium carbonate scale stripping rate is 88.7 percent, the surface tension is 25.2N/mN, and the interfacial tension is 3.5 multiplied by 10-2N/mN, the corrosion rate is only 0.049 mm/year.
The test performance of the comprehensive pressure control medicament disclosed by the invention is as follows under the condition that the adding mass concentration of the comprehensive pressure control medicament is 0.3 percent: the pH value is 5.5, the calcium carbonate scale stripping rate is 90.3 percent, the surface tension is 24.8N/mN, and the interfacial tension is 8.4 multiplied by 10-3N/mN, the corrosion rate is only 0.052 mm/year.
The method for measuring the peeling rate of the calcium carbonate scale comprises the following steps:
accurately weighing 0.1 g of scale sample component in a 250mL triangular flask with a plug, recording the mass as m1, sequentially adding 1.00g of test sample and 100g of water, stirring uniformly, placing in a water bath kettle at 60 ℃, placing for 24h, after the reaction is finished, filtering the solution by using medium-speed quantitative filter paper, recording the mass as m0 by using the medium-speed quantitative filter paper (weighing after drying and drying, and accurately reaching 0.0001g), placing the filter residue and the filter paper in a 105 ℃ oven, taking out after 2h, placing in a dryer, weighing after 30min, and recording the mass as m 2;
the formula for calculating the stripping rate of the calcium carbonate scale is as follows:
in the formula: c-calcium carbonate scale peeling rate,%;
m1-mass of scale sample before test, g;
m0-filter paper mass, g;
m2mass of filter residue and filter paper after test, g.
Example 4:
taking the highland Luo A block as an example, an insufficient injection well with 2 ports of length 8 oil reservoirs at a well site is subjected to increased injection by 2 times and 3 times of measures respectively, and 100m is used at the well site in 5 months in 20183D supercharging device, after using, the average daily injection of the two wells is increased by 15m3And d, the injection allocation requirements are met, but tracking finds that the average pressure of the wellhead rises by 1.5MPa after 3 months. The comprehensive pressure control agent in the invention is added from 8 months in 2018, the adding concentration is 0.2%, the adding is continued for 3 months, from 12 months in 2019, the oil pressure at the well heads of the two water injection wells is found to be reduced by 0.9MPa on average, the water injection pressure of the two water injection wells is not increased after the adding of the agent is stopped, and the purpose of stable water injection for a long time is achieved.
While the embodiments of the present invention have been described in detail, the present invention is not limited to the embodiments described above, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and the scope of the present invention is within the scope of the claims.
Claims (12)
1. A long-acting augmented injection method for an ultra-low permeability reservoir water injection well is characterized by comprising the following steps: comprises the following steps
S001, selecting a short water injection well which is subjected to multiple times of measures before multiple openings and is still under-injected;
s002, injecting water into the water-deficient injection well, pressurizing the water injected by the water injection by adopting a pressurizing device, and adding a comprehensive pressure control medicament;
s003, according to the pressure rise range of the under-injection well, proportioning the comprehensive pressure control medicament aqueous solution with the required concentration, injecting the aqueous solution mixed with the comprehensive pressure control medicament after pressurization into the selected under-injection well, wherein the injection displacement of the pressurization device is 100m3D to 300m3And d, the supercharging amplitude is less than or equal to 10 MPa.
2. The long-acting augmented injection method for the water injection well of the ultra-low permeability reservoir as claimed in claim 1, characterized in that: in the S003, for the under-injection well with the early stage pressure rise amplitude of less than 2MPa, continuously adding a comprehensive pressure control medicament aqueous solution with the mass concentration of 0.1% for 6 months; for the under-injection well with the pressure rise amplitude of 2MPa to 4MPa, pulse type comprehensive pressure control medicament aqueous solution with the mass concentration of 0.2 percent is selected for 1 to 2 months; for the under-injection well with the pressure rise amplitude of more than 4MPa, the comprehensive pressure control medicament aqueous solution with the mass concentration of 0.3 percent is added for one time for 1 month.
3. The long-acting augmented injection method for the water injection well of the ultra-low permeability reservoir as claimed in claim 1, characterized in that: in S003, the injection displacement of the supercharging device is controlled by 100m3D to 300m3And when the pressure is/d, the number of the injected underpinning wells is 3-7.
4. The long-acting augmented injection method for the water injection well of the ultra-low permeability reservoir as claimed in claim 1 or 3, characterized in that: the pressurizing device comprises a centrifugal pressurizing water injection pump and a dosing device, the centrifugal pressurizing water injection pump and the dosing device are integrally skid-mounted on the same skid seat, and a water outlet pipeline of the centrifugal pressurizing water injection pump and a drug outlet pipeline of the dosing device are converged and then are led into the under-injection well.
5. The long-acting augmented injection method for the water injection well of the ultra-low permeability reservoir as claimed in claim 4, characterized in that: the centrifugal booster water injection pump is a centrifugal booster water injection pump with the inlet pressure of 15-20 MPa, the outlet pressure of 25-30 MPa, the medium temperature of less than or equal to 80 ℃, the power supply voltage of 380 +/-5% V and the frequency of 50 Hz.
6. The long-acting augmented injection method for the water injection well of the ultra-low permeability reservoir as claimed in claim 4, characterized in that: the charge device for adding the medicinal cupping, be provided with stirred tank in the medicinal cupping, a jar body, pressure sensor, the play medicine mouth that adds the medicinal cupping is provided with the diaphragm measurement plunger pump that is used for controlling comprehensive accuse pressure medicament addition volume, at first add the concentration ratio of comprehensive accuse pressure medicament according to needs and add the volume of required comprehensive accuse pressure medicament and add the medicinal cupping during the medicine adding, the diaphragm measurement pump control adds the medicine flow, synthesize accuse pressure medicament and mix at the export of centrifugal pressure boost water injection pump and the injected water after the pressure boost, pour into the single well of short notes in the water distribution room along with, it can stabilize the water injection for a long time to add the water injection well through throwing for a long time.
7. The long-acting augmented injection method for the water injection well of the ultra-low permeability reservoir as claimed in claim 1, characterized in that: the comprehensive pressure control medicament in the S002 comprises, by mass percent 100%, 10% of amphoteric surfactant, 12% to 15% of stripping dispersant, 20% to 24% of chelating agent, 15% to 18% of wetting agent, 8% to 12% of solubilizer and the balance of water.
8. The long-acting augmented injection method for the water injection well of the ultra-low permeability reservoir as claimed in claim 7, characterized in that: the amphoteric surfactant is mainly a betaine surfactant which is octadecyl propyl hydroxysulfobetaine, and the effective content of the betaine surfactant is 40%.
9. The long-acting augmented injection method for the water injection well of the ultra-low permeability reservoir as claimed in claim 7, characterized in that: the stripping dispersant is polyamino polyether methylene phosphonic acid, and the content of active ingredients of the stripping dispersant is 60%.
10. The long-acting augmented injection method for the water injection well of the ultra-low permeability reservoir as claimed in claim 7, characterized in that: the chelating agent is nitrilotriacetic acid, and the content of the effective component of the chelating agent is 99%.
11. The long-acting augmented injection method for the water injection well of the ultra-low permeability reservoir as claimed in claim 7, characterized in that: the wetting agent is glycerol polyoxyethylene ether GE-8, the content of the effective component is 99%, and the hydroxyl value is 350-420.
12. The long-acting augmented injection method for the water injection well of the ultra-low permeability reservoir as claimed in claim 7, characterized in that: the solubilizer is nonylphenol polyoxyethylene polyoxypropylene ether NPE-108, the content of active ingredients is 99%, and the HLB value is 10-11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011345171.XA CN112576227A (en) | 2020-11-26 | 2020-11-26 | Long-acting augmented injection method for water injection well of ultra-low permeability reservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011345171.XA CN112576227A (en) | 2020-11-26 | 2020-11-26 | Long-acting augmented injection method for water injection well of ultra-low permeability reservoir |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112576227A true CN112576227A (en) | 2021-03-30 |
Family
ID=75123829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011345171.XA Pending CN112576227A (en) | 2020-11-26 | 2020-11-26 | Long-acting augmented injection method for water injection well of ultra-low permeability reservoir |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112576227A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104632152A (en) * | 2014-12-15 | 2015-05-20 | 中国石油天然气股份有限公司 | Injection increasing and pressure reducing system and method for water injection well of ultra-low permeability oil field |
| CN106833580A (en) * | 2016-12-29 | 2017-06-13 | 中国石油天然气股份有限公司 | Pressure-reducing and injection-increasing scale inhibitor for low-permeability water injection well and preparation method thereof |
| CN108559473A (en) * | 2018-05-15 | 2018-09-21 | 大庆华理生物技术有限公司 | A kind of increasing injection agent of water injection well containing biosurfactant |
| CN110700804A (en) * | 2019-10-09 | 2020-01-17 | 中国石油天然气股份有限公司 | Method for adding antihypertensive and augmented injection medicament |
| CN111961456A (en) * | 2020-08-19 | 2020-11-20 | 中国石油天然气股份有限公司 | Chelating injection-increasing agent for water injection well and preparation method thereof |
-
2020
- 2020-11-26 CN CN202011345171.XA patent/CN112576227A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104632152A (en) * | 2014-12-15 | 2015-05-20 | 中国石油天然气股份有限公司 | Injection increasing and pressure reducing system and method for water injection well of ultra-low permeability oil field |
| CN106833580A (en) * | 2016-12-29 | 2017-06-13 | 中国石油天然气股份有限公司 | Pressure-reducing and injection-increasing scale inhibitor for low-permeability water injection well and preparation method thereof |
| CN108559473A (en) * | 2018-05-15 | 2018-09-21 | 大庆华理生物技术有限公司 | A kind of increasing injection agent of water injection well containing biosurfactant |
| CN110700804A (en) * | 2019-10-09 | 2020-01-17 | 中国石油天然气股份有限公司 | Method for adding antihypertensive and augmented injection medicament |
| CN111961456A (en) * | 2020-08-19 | 2020-11-20 | 中国石油天然气股份有限公司 | Chelating injection-increasing agent for water injection well and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 王尔珍: "长庆姬塬油田长效在线增注技术现场应用", 《油田化学》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107365576B (en) | For hypotonic or Oil in Super-low Permeability oil reservoir CO2The fluidity control system of the displacement of reservoir oil and application | |
| CN102423655B (en) | Large-flow fracturing fluid preparation system and method | |
| CN106089175A (en) | A kind of discharge capacity self adaptation mixing device and control method | |
| CN101328798A (en) | Method for exploiting thick oil | |
| CN105273703B (en) | Oil field anti-corrosion anti-scale wax control is dehydrated the defeated composite drug of viscosity reduction room temperature collection | |
| CN104109518A (en) | Oil displacement composition used for low permeability oil reservoirs, and preparation method thereof | |
| CN106520103B (en) | Scale remover for long-acting pressure reduction and injection increase of water injection well and preparation method thereof | |
| CN105683330A (en) | Carbonate-based slurry fracturing with solid acid for unconventional reservoir | |
| CN100516164C (en) | High-temperature high-salt resistant nano emulsion viscosity-reducing agent | |
| CN116200183A (en) | High-efficiency variable-viscosity fracturing fluid for deep coal bed gas development and integrated construction method | |
| RU2436941C1 (en) | Procedure for control over water flood of non-uniform reservoir | |
| CN103911139B (en) | Capsule parcel solid hydrochloric acid preparation method | |
| CN110054727A (en) | A kind of preparation method and device of polyacrylamide nano microballoon | |
| CN112576227A (en) | Long-acting augmented injection method for water injection well of ultra-low permeability reservoir | |
| CN114752366A (en) | Biological surfactant plugging-removing injection-increasing agent and application system | |
| RU2418156C1 (en) | Development method of non-homogeneous oil formation | |
| CN110358519A (en) | A kind of preparation method of low residue salt tolerant fracturing fluid | |
| CN112961662A (en) | Wetting reversal agent, wetting reversal liquid and pressure flooding water injection method | |
| CN107143318A (en) | Single pump individual well two-stage concentration allotment weak base ternary injection device and its application method | |
| CN107218009A (en) | A kind of low-permeability sandstone oil reservoir chromium aluminium ion compounding profile control agent and its application method | |
| CN107365572A (en) | A kind of double slug profile control agents of Fracture with low permeability oil deposit deep part and its application method | |
| CN116948079A (en) | Drag reducer for shale gas reservoir fracturing and preparation method thereof | |
| CN107353930A (en) | A kind of sulfur elimination and preparation method thereof | |
| RU2321733C1 (en) | Method to control injection well injectivity profile | |
| CN108854608A (en) | Nitrogen sealed polymer dissolving device and its prepared polymer mother liquor method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210330 |