CN113445944A - Pollution-free sand-proof production-increasing method for oil well - Google Patents
Pollution-free sand-proof production-increasing method for oil well Download PDFInfo
- Publication number
- CN113445944A CN113445944A CN202110710700.XA CN202110710700A CN113445944A CN 113445944 A CN113445944 A CN 113445944A CN 202110710700 A CN202110710700 A CN 202110710700A CN 113445944 A CN113445944 A CN 113445944A
- Authority
- CN
- China
- Prior art keywords
- well
- sand
- sand control
- oil
- production
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000003129 oil well Substances 0.000 title claims abstract description 25
- 239000004576 sand Substances 0.000 claims abstract description 120
- 238000010276 construction Methods 0.000 claims abstract description 53
- 238000004519 manufacturing process Methods 0.000 claims abstract description 46
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 44
- 239000012530 fluid Substances 0.000 claims abstract description 38
- 238000005406 washing Methods 0.000 claims abstract description 27
- 238000007790 scraping Methods 0.000 claims abstract description 15
- 238000006073 displacement reaction Methods 0.000 claims abstract description 12
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- 239000004927 clay Substances 0.000 claims abstract description 4
- 239000003607 modifier Substances 0.000 claims abstract description 4
- 238000011010 flushing procedure Methods 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 230000002579 anti-swelling effect Effects 0.000 claims description 14
- 238000005516 engineering process Methods 0.000 claims description 8
- 238000001125 extrusion Methods 0.000 claims description 7
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 6
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 6
- 239000001110 calcium chloride Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 6
- 241000710124 Human rhinovirus A2 Species 0.000 claims description 5
- 239000000700 radioactive tracer Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 238000005345 coagulation Methods 0.000 claims description 3
- 230000015271 coagulation Effects 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 230000000638 stimulation Effects 0.000 claims 4
- 230000002265 prevention Effects 0.000 abstract description 11
- 230000035699 permeability Effects 0.000 abstract description 3
- 238000007596 consolidation process Methods 0.000 abstract description 2
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 238000012856 packing Methods 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 239000003381 stabilizer Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 40
- 239000000126 substance Substances 0.000 description 4
- 239000003208 petroleum Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 244000147058 Derris elliptica Species 0.000 description 1
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical compound C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 description 1
- 241000219000 Populus Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 125000001453 quaternary ammonium group Chemical class 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000011800 void material Substances 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- 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
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/068—Arrangements for treating drilling fluids outside the borehole using chemical treatment
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Lubricants (AREA)
Abstract
The invention discloses a pollution-free sand control production increasing method for an oil well, which is realized by construction preparation, sand control construction operation and production recovery construction operation in sequence; the construction preparation steps sequentially comprise well washing and killing, primary production pipe column pulling, sand washing pipe string descending, casing breakage prevention determination, well dredging, scraping and other stratum packing; the sand prevention construction operation comprises the steps of firstly preparing a pre-solution, a treating solution and a displacing solution by adopting a sand prevention agent compounded by a sand potential modifier and a clay stabilizer; then forward extruding the pad fluid, forward extruding treatment fluid and forward extruding displacement fluid into the well in sequence, closing the well for 48 hours, and then pulling out and injecting the sand control pipe column; the production construction operation comprises the steps of taking out the isolated sand-proof pipe string, completing the well and recovering the normal production operation; the pollution-free sand prevention and yield increase method for the oil well consolidates sand grains by means of Coulomb force among the sand grains, realizes pollution-free sand consolidation on a reservoir on the premise of ensuring the permeability of the reservoir, realizes sand prevention and yield increase, has no hidden danger of environmental pollution, and has a long effective period.
Description
Technical Field
The invention relates to the technical field of oil field well repair, in particular to a pollution-free sand control production increasing method for an oil well.
Background
In part of oil wells, because the stratum cementation degree is poor and the exploitation strength is overlarge, reservoir rock is loosened and broken, and stratum sand production is initiated. Formation sand production may result in: the method comprises the steps of firstly, oil layer burying by sand, production reduction, service life shortening due to sand rubbing of underground equipment, oil well overhaul due to sand pipe column burying, stratum void collapse and oil well scrapping. The sand control technology adopted in the oil extraction industry at present comprises two types of mechanical sand control and chemical sand control; wherein, the mechanical sand control method is simple, the construction cost is low, but the production of stratum sand can not be prevented; the chemical reconstruction borehole wall sand control can be used for various reservoirs, has good effect on fine silt, but has high cost, short validity period and obvious reduction of permeability; the reconstructed well wall chemical sand control is to use a binder to consolidate a sand production layer, can fundamentally treat sand production, and is the main research direction of the prior sand control technology.
Disclosure of Invention
The invention aims to provide a pollution-free sand control and yield increase method for an oil well aiming at sand control and yield increase of a sand producing oil well.
The technical scheme of the invention is as follows:
a pollution-free sand control production increasing method for an oil well comprises the following specific construction steps:
step S1, construction preparation:
s101, preparing a well flushing fluid, heating to 70-75 ℃, and flushing the well in a reverse well flushing mode of entering from an oil sleeve annulus and returning from an oil pipe; after the well washing is finished, calcium chloride well killing fluid is prepared according to the formation pressure to complete well killing;
s102, extracting an original production string from the well, wherein the original production string comprises a sucker rod string and an oil pipe string;
s103, putting the sand washing pipe string, and pulling out the sand washing pipe string after sand washing reaches the geological and engineering design depth;
s104, ensuring the damage-free position of the casing by using a tracer leakage finding technology:
s105, connecting the drift size gauge with the oil pipe to form a drift tubular column, and putting the drift tubular column into the well to drift; when the drifting exceeds the construction well section, normal-temperature calcium chloride well killing fluid used in the step S101 and having 2-3 times of well bore volume is used as well flushing fluid, and well flushing is carried out in a forward well flushing mode of entering from an oil pipe and returning from an oil sleeve annulus;
s106, connecting the scraper with an oil pipe to form a scraping pipe column, putting the scraping pipe column into a well, scraping a well section to be constructed for 12-15 times, and then washing the well by adopting normal-temperature well killing fluid which is 2-3 times of the volume of the well shaft and is used in the step S101 in a forward well washing mode of entering from an oil sleeve annulus and returning from the oil pipe;
s107, assembling and isolating the sand control pipe string and putting the sand control pipe string into a well, and independently isolating a production zone with serious sand production so as to perform sand control construction;
s2, sand control construction operation: firstly, preparing a pre-solution, a treating solution and a displacing solution by using the sand control agent in the step S201; then forward extruding the preposed liquid wells for 3-7 m in sequence towards the underground3The forward extrusion treatment liquid is 40-80 m3Positive extrusion of 4-8 m of displacement liquid3Closing the well for 48 h; wherein the highest pump pressure is less than or equal to 30.0MPa, and the highest discharge capacity is less than or equal to 600L/min; after the construction is finished, the sand control pipe column is taken out and injected, and the sand control construction is finished;
s3, production and construction operation: and (5) unsealing the packer and taking out the isolated sand-proof pipe string, and recovering normal production operation after the pipe string combination well completion is put into the packer according to the engineering design.
Further, in step S101, the well-flushing fluid passes through the jointAdding 1 wt.% of HRV-2 viscosity reducer into treated oil field deoiling produced water, and uniformly mixing to obtain the oil field deoiling produced water; the dosage of the composition is 50-60 m3。
Further, the used states of the drift size gauge and the scraper are observed after the steps S105 and S106, so as to judge whether the casing meets the requirements of the next construction.
Further, before the sand control construction operation of step S2, a compatibility test is performed on the sand control agent, which includes the steps of: firstly, taking 100mL of well killing fluid in a well, then fully and uniformly mixing the well killing fluid with 100mL of sand control agent aqueous solution in a plastic or glass container with the volume of 300-500 mL, standing for 15min at normal temperature, and observing the reaction condition; if no reaction coagulation or precipitation phenomenon exists after standing for 15min, the sand control agent is proved to meet the compatibility requirement.
Further, in step S2, the sand control agent is compounded by the sand potential modifier and the clay anti-swelling agent.
Further, in step S2, the pad fluid is prepared by adding 1 part by weight of sand control agent and 0.2 part by weight of anti-swelling agent to 100 parts by weight of clear water and mixing; the treating fluid is prepared by adding 5 parts by weight of sand control agent and 0.2 part by weight of anti-swelling agent into every 100 parts by weight of clear water and mixing; the displacement liquid is prepared by adding 1 weight part of sand control agent and 0.2 weight part of anti-swelling agent into every 100 weight parts of clear water and mixing.
Further, in the normal production process in the step S3, the liquid collecting strength is controlled to be less than or equal to 1.2m per meter of daily liquid collecting amount corresponding to the thickness of the pay zone3。
Compared with the prior art, the pollution-free sand control production increasing method for the oil well changes the traditional sand control mechanism, sand grains are consolidated by means of Coulomb force among the sand grains without depending on a binder, pollution-free sand consolidation of a reservoir is realized on the premise of ensuring the permeability of the reservoir, sand control production increase is further realized, no excessive sand control agent needs to be washed out after sand control operation, construction is simple, potential hazards of environmental pollution are avoided, and the effective period is long.
Detailed Description
The present invention will be further described with reference to the following examples, which are not intended to limit the invention in any way. In the following examples, commercially available products were used for each apparatus or chemical used in each application step.
Example 1
The oil well sand prevention production increasing method is adopted to carry out production increasing construction on Zhao 57-43X wells (the outer diameter of the well casing is 139.7 mm). The main problem with this well is that the production zone is heavily sanded, resulting in the well not producing properly; by using the original water plugging construction method, the success rate of primary water plugging is low due to reverse discharge of a damaged position; based on the method, the specific construction steps for the oil well sand prevention production increase method are as follows:
step S1, a construction preparation, which is sequentially completed by the following steps:
s101, well washing and killing operation:
(1) well washing operation: taking 50-60 m of treated oilfield deoiled produced water3Adding 1 wt.% of HRV-2 viscosity reducer, stirring and mixing uniformly to prepare a well-flushing fluid; heating the well-flushing fluid to 70-75 ℃, and flushing the well in a reverse well-flushing mode of entering from the annular space of the oil sleeve and returning from the oil pipe;
the pump pressure of the well-flushing pump truck is controlled to be less than or equal to 15.0MPa, the discharge capacity is gradually increased from 0L/min, and the maximum discharge capacity is controlled to be less than or equal to 300L/min based on the outer diameter of the casing pipe being 139.7 mm;
HRV-2 viscosity-lowering agent was manufactured by Xin Shu chemical Co., Ltd, Ciji; the performance of the HRV-2 thick oil viscosity reducer is described in detail in the section of No. 18, No. 3 of petroleum drilling and production technology of 1996 by Poplar and people;
(2) well killing operation: after the well washing operation is finished, configuring a calcium chloride well killing hydraulic well according to the formation pressure;
s102, extracting an original production string from the well, wherein the original production string comprises a sucker rod string and an oil pipe string;
s103, sand washing operation: putting the sand washing pipe string, and taking out the sand washing pipe string after sand washing is carried out to the geological and engineering design depth; specifically, the sand washing pipe column is composed of a nib with the diameter of 73mm and an external thickened oil pipe with the diameter of 73mm connected to the top end of the nib, and the length of the sand washing pipe column meets the requirement that the bottom end of the nib reaches the position of a sand surface;
s104, tracer leakage finding:
determining the position of the casing without damage by using a tracer leakage finding technology; wherein, the tracer leakage finding method is the prior art, which is specifically written in Tantana et al, published in 1991 by Petroleum industry Press as application of well logging data in oil and gas field development; if the sleeve is damaged, the damaged position is firstly plugged, and the subsequent steps are carried out after the sleeve is qualified through pressure test;
s105, well flushing:
connecting a thickened oil pipe with the diameter of 73mm to the top end of the drift size gauge with the outer diameter of 118mm in a threaded manner to form a drift tubular column, and performing drift construction; after the successful drifting exceeds the construction well section, normal-temperature calcium chloride well killing fluid used in the step S101 and having 2-3 times of well bore volume is adopted as well flushing fluid, and well flushing is carried out in a forward well flushing mode of entering from an oil pipe and returning from an oil sleeve annulus; after the well washing is finished, pulling out the drifting tubular column, and checking the condition of the drifting gauge to judge whether the casing meets the next construction requirement; in this step, since the specific construction method of the well-flushing is well known to those skilled in the art, it will not be described in detail herein.
S106, scraping and washing the well:
connecting a thickened oil pipe with the diameter of 73mm to the top end of the GX-140T type scraper in a threaded manner to form a scraping pipe column, and performing scraping construction; in the scraping construction process, scraping a construction well section for 12-15 times by adopting a scraping pipe column, and then washing the well by adopting normal-temperature well killing fluid which is 2-3 times of the volume of the shaft and is used in the step S101 in a forward well washing mode of entering from an oil sleeve annulus and returning from an oil pipe; after the well washing is finished, the scraping pipe column is lifted out, and the abrasion condition of the scraper is checked to judge whether the casing meets the next construction requirement;
wherein, the GX-140T type scraper is a common well repairing operation tool for the oil field sold in the market, and the performance and the using method of the scraper are described in detail in a 'thick oil cold production method at the edge of the oil reservoir structure of the North China oil field' published in the 3 rd month in 2017, 39 nd volume 2 < petroleum drilling and production technology >; in addition, the specific construction of scraping the well-flushing is well known to those skilled in the art and will not be described in detail herein.
S107, isolating the sand producing zone from other producing zones:
the assembly and isolation sand control pipe string is composed of an oil pipe hanger, an external thickened oil pipe with the diameter of 73mm, a variable buckle, a flat oil pipe nipple with the diameter of 73mm, a Y211-114 packer, an external thickened oil pipe with the diameter of 73mm and a bell mouth which are sequentially connected from top to bottom; during operation, a lifting short section with the length of 1.5m and the diameter of 73mm is connected to the top end of the oil pipe hanger through threads, an oil well operation device is adopted to lift and isolate the sand control pipe string for 1.4m, then the sand control pipe string is slowly lowered to the underground, the packer is subjected to setting through pressurization of 70KN, meanwhile, the oil pipe hanger is set, a top jackscrew is arranged to ensure that the setting is qualified, and an oil tree with the pressure bearing capacity not less than 35MPa is installed;
the specific setting construction method of the packer is well known by the technical personnel in the field, and the specific construction method of qualified setting of the setting oil pipe hanger and the top jackscrew is recorded in the application of wellhead integrity technology in Luima oil field published in the 2 nd volume of No. 6 unconventional oil and gas in 12 months in 2015, so the method is well known by the technical personnel in the field and is not detailed here.
Step S2, sand control construction operation:
s201, testing compatibility:
taking 100mL of well killing fluid in a well, fully and uniformly mixing the well killing fluid with 100mL of sand control agent in a plastic or glass container with the volume of 300-500 mL, standing for 15min at normal temperature, and observing the reaction condition; if no reaction coagulation or precipitation phenomenon exists after standing for 15min, the sand control agent is proved to meet the compatibility requirement; wherein, the sand control agent is prepared by adding 1 weight part of sand control agent and 0.2 weight part of anti-swelling agent into every 100 weight parts of clear water and mixing; specifically, the sand control agent adopts CF-1 type sand particle potential modifier produced by Shanghai Longjun scientific and technical limited company, and the anti-swelling agent adopts quaternary ammonium salt-II type clay anti-swelling agent produced by Zhejiang kente catalytic material limited company;
s202, injecting a sand control agent:
firstly, adopting the sand control agent in the step S201 to prepare a pad fluid, a treatment fluid and a displacement fluid; specifically, the pad fluid is added into every 100 weight parts of clear waterAdding 1 part by weight of sand control agent and 0.2 part by weight of anti-swelling agent, and mixing and preparing; the treating fluid is prepared by adding 5 weight parts of sand control agent and 0.2 weight part of anti-swelling agent into every 100 weight parts of clear water and mixing; the displacement liquid is prepared by adding 1 weight part of sand control agent and 0.2 weight part of anti-swelling agent into every 100 weight parts of clear water and mixing; then, the pressure was sequentially pumped down to the well at 3MPa and 0.2m3Permin displacement forward extrusion preposed liquid well 5m30.5m at a pump pressure of 10MPa3Permin displacement positive extrusion treatment liquid 60m30.6m at a pump pressure of 10MPa3Displacement of 6m displacement liquid for positive extrusion per min3Then closing the well for 48 h; the preparation method and the injection construction method of the sand control agent are well known to those skilled in the art, and therefore, the details thereof are not described herein.
S203, after the construction in the step S202 is completed, the sand control pipe column is taken out and injected, and the sand control construction is completed.
Step S3, production construction operation: slowly lifting the pipe string for 1.4m to unseal the packer and taking out the isolated sand-prevention pipe string; after the pipe column combination completion is put down according to the engineering design, the production is recovered; wherein, in the production process, the liquid collecting strength is controlled to be 1.2m per meter of daily liquid collecting amount corresponding to the thickness of the producing zone3So as to prolong the effective period of sand control.
Through the oil well sand prevention and yield increase construction process, the Zhao 57-43X well sand prevention and yield increase effect is good, the daily yield before the construction is zero, and the daily yield of crude oil after the sand prevention construction is 6.9 tons.
Example 2
The oil well sand control production increase method of the embodiment 1 is simultaneously applied to sand control construction of an oil well with serious sand production in other six production zones on site; through the construction, the sand prevention success rate of the oil well is 100%, and the average daily oil increment is 5.2 tons.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A pollution-free sand control production increasing method for an oil well is characterized by comprising the following specific construction steps:
step S1, construction preparation:
s101, preparing a well flushing fluid, heating to 70-75 ℃, and flushing the well in a reverse well flushing mode of entering from an oil sleeve annulus and returning from an oil pipe; after the well washing is finished, calcium chloride well killing fluid is prepared according to the formation pressure to complete well killing;
s102, extracting an original production string from the well, wherein the original production string comprises a sucker rod string and an oil pipe string;
s103, putting the sand washing pipe string, and pulling out the sand washing pipe string after sand washing reaches the geological and engineering design depth;
s104, ensuring the damage-free position of the casing by using a tracer leakage finding technology:
s105, connecting the drift size gauge with the oil pipe to form a drift tubular column, and putting the drift tubular column into the well to drift; when the drifting exceeds the construction well section, normal-temperature calcium chloride well killing fluid used in the step S101 and having 2-3 times of well bore volume is used as well flushing fluid, and well flushing is carried out in a forward well flushing mode of entering from an oil pipe and returning from an oil sleeve annulus;
s106, connecting the scraper with an oil pipe to form a scraping pipe column, putting the scraping pipe column into a well, scraping the well section to be constructed for 12-15 times, and then adopting the normal-temperature well killing fluid which is 2-3 times of the volume of the well shaft and is used in the step S101 to wash the well in a forward well washing mode of entering from the annular space of the oil sleeve and returning from the oil pipe;
s107, assembling and isolating the sand control pipe string and putting the sand control pipe string into a well, and independently isolating a production zone with serious sand production so as to perform sand control construction;
s2, sand control construction operation: firstly, adopting the sand control agent in the step S201 to prepare a pad fluid, a treatment fluid and a displacement fluid; then, forward extruding the preposed liquid wells for 3-7 m in sequence towards the underground3The forward extrusion treatment liquid is 40-80 m3Positive extrusion of 4-8 m of displacement liquid3Closing the well for 48 h; wherein the highest pump pressure is limited to 30.0MPa, and the highest discharge capacity is 600L/min; and (5) after the construction is finished, taking out and injecting the sand control pipe column, and finishing the sand control construction.
S3, production and construction operation: and (5) unsealing the packer and taking out the isolated sand-proof pipe string, and recovering normal production operation after the pipe string combination well completion is put into the packer according to the engineering design.
2. The pollution-free sand control production increase method for the oil well according to claim 1, wherein in step S101, the flushing fluid is prepared by adding 1 wt.% of HRV-2 viscosity reducer into the treated oil field deoiled produced water and mixing uniformly; the dosage of the composition is 50-60 m3。
3. The method of claim 1, wherein the post-use status of the drift gauge and the scraper is observed after steps S105 and S106 to determine whether the casing meets the next construction requirement.
4. The pollution-free sand control stimulation method for the oil well according to the claim 1, wherein the compatibility test of the sand control agent is performed before the sand control construction operation of the step S2, and the steps are as follows: firstly, taking 100mL of well killing fluid in a well, then fully and uniformly mixing the well killing fluid with 100mL of sand control agent aqueous solution in a plastic or glass container with the volume of 300-500 mL, standing for 15min at normal temperature, and observing the reaction condition; if no reaction coagulation or precipitation phenomenon exists after standing for 15min, the sand control agent is proved to meet the compatibility requirement.
5. The method of uncontaminated sand control stimulation of an oil well according to claim 1, wherein in step S2 the sand control agent is formulated from a sand potential modifier and a clay anti-swelling agent.
6. The pollution-free sand control stimulation method for oil wells according to claim 1, wherein in step S2, the pad fluid is prepared by adding 1 part by weight of sand control agent and 0.2 part by weight of anti-swelling agent to 100 parts by weight of clear water and mixing; the treating fluid is prepared by adding 5 weight parts of sand control agent and 0.2 weight part of anti-swelling agent into every 100 weight parts of clear water and mixing; the displacement liquid is prepared by adding 1 weight part of sand control agent and 0.2 weight part of anti-swelling agent into every 100 weight parts of clear water and mixing.
7. The method of uncontaminated sand control stimulation of an oil well of claim 1, which isCharacterized in that in the normal production process in the step S3, the liquid collecting strength is controlled to be less than or equal to 1.2m per meter of daily liquid collecting amount corresponding to the thickness of the producing zone3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110710700.XA CN113445944B (en) | 2021-06-25 | 2021-06-25 | Pollution-free sand prevention and yield increase method for oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110710700.XA CN113445944B (en) | 2021-06-25 | 2021-06-25 | Pollution-free sand prevention and yield increase method for oil well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113445944A true CN113445944A (en) | 2021-09-28 |
| CN113445944B CN113445944B (en) | 2023-07-14 |
Family
ID=77812769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110710700.XA Active CN113445944B (en) | 2021-06-25 | 2021-06-25 | Pollution-free sand prevention and yield increase method for oil well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113445944B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133389A (en) * | 1995-10-18 | 1996-10-16 | 辽河石油勘探局钻采工艺研究院 | Artificial well-wall sand-proof technology for steam-injection thermal-recovery well of viscous crude oil |
| CN1472418A (en) * | 2003-06-26 | 2004-02-04 | 辽宁天意实业股份有限公司 | High-temperature high-pressure artifical sandproof well wall and construction technology thereof |
| US20100096130A1 (en) * | 2008-10-20 | 2010-04-22 | Mehmet Parlar | Toe-to-heel gravel packing methods |
| CN201671623U (en) * | 2010-05-18 | 2010-12-15 | 中国石油天然气股份有限公司 | Pipe column for leakage finding and separate mining of horizontal well |
| US20110000668A1 (en) * | 2009-07-06 | 2011-01-06 | Tunget Bruce A | Through tubing cable rotary system |
| CN102330545A (en) * | 2011-10-17 | 2012-01-25 | 中国石油天然气股份有限公司 | Sand prevention method for heavy oil reservoir oil well |
| CN103013485A (en) * | 2012-12-12 | 2013-04-03 | 中国石油天然气股份有限公司 | Modified resin sand consolidation agent and preparation method and application thereof |
| CN103899286A (en) * | 2012-12-28 | 2014-07-02 | 中国石油天然气股份有限公司 | Method for cold production of thick oil at edge of oil reservoir structure |
| CN106677729A (en) * | 2016-07-13 | 2017-05-17 | 克拉玛依市泰英科技有限责任公司 | Slurry solid-fluid recovery integrated processing device system |
| CN109869121A (en) * | 2019-03-18 | 2019-06-11 | 中国石油化工股份有限公司 | The mechanical sand control technique of small casing pipe well |
-
2021
- 2021-06-25 CN CN202110710700.XA patent/CN113445944B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133389A (en) * | 1995-10-18 | 1996-10-16 | 辽河石油勘探局钻采工艺研究院 | Artificial well-wall sand-proof technology for steam-injection thermal-recovery well of viscous crude oil |
| CN1472418A (en) * | 2003-06-26 | 2004-02-04 | 辽宁天意实业股份有限公司 | High-temperature high-pressure artifical sandproof well wall and construction technology thereof |
| US20100096130A1 (en) * | 2008-10-20 | 2010-04-22 | Mehmet Parlar | Toe-to-heel gravel packing methods |
| US20110000668A1 (en) * | 2009-07-06 | 2011-01-06 | Tunget Bruce A | Through tubing cable rotary system |
| CN201671623U (en) * | 2010-05-18 | 2010-12-15 | 中国石油天然气股份有限公司 | Pipe column for leakage finding and separate mining of horizontal well |
| CN102330545A (en) * | 2011-10-17 | 2012-01-25 | 中国石油天然气股份有限公司 | Sand prevention method for heavy oil reservoir oil well |
| CN103013485A (en) * | 2012-12-12 | 2013-04-03 | 中国石油天然气股份有限公司 | Modified resin sand consolidation agent and preparation method and application thereof |
| CN103899286A (en) * | 2012-12-28 | 2014-07-02 | 中国石油天然气股份有限公司 | Method for cold production of thick oil at edge of oil reservoir structure |
| CN106677729A (en) * | 2016-07-13 | 2017-05-17 | 克拉玛依市泰英科技有限责任公司 | Slurry solid-fluid recovery integrated processing device system |
| CN109869121A (en) * | 2019-03-18 | 2019-06-11 | 中国石油化工股份有限公司 | The mechanical sand control technique of small casing pipe well |
Non-Patent Citations (6)
| Title |
|---|
| 丁海涛等: "化学防砂工艺在临盘油田的应用与发展", 《内蒙古石油化工》 * |
| 丁海涛等: "化学防砂工艺在临盘油田的应用与发展", 《内蒙古石油化工》, 30 September 2012 (2012-09-30) * |
| 付亚荣等: "斜井分层采油与防砂联作工艺技术", 《石油矿场机械》 * |
| 付亚荣等: "斜井分层采油与防砂联作工艺技术", 《石油矿场机械》, 25 July 2018 (2018-07-25) * |
| 程亮等: "抑水防砂工艺在跃进二号油田的先导性试验", 《化学工程与装备》 * |
| 程亮等: "抑水防砂工艺在跃进二号油田的先导性试验", 《化学工程与装备》, 15 October 2016 (2016-10-15) * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113445944B (en) | 2023-07-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109763804B (en) | Staged temporary plugging fracturing method for horizontal well | |
| CN110130867B (en) | Staged multi-cluster fracturing method for slim-hole sidetracking horizontal well | |
| CN108166944B (en) | Repairing method of damaged casing in oil and gas well and rapid fluid loss plugging slurry | |
| CN111255428B (en) | Casing horizontal well shaft reconstruction repeated fracturing method | |
| CN114836184B (en) | Degradable temporary plugging agent for offshore large-leakage oil-water well workover and use method thereof | |
| CN106894783B (en) | Method for drilling and milling plug of coiled tubing | |
| CN111927384A (en) | High-strength pure liquid plugging agent plugging process for plugging leaking layer and water plugging | |
| CN103899244A (en) | Method for repairing damaged drilled hole for in-situ leaching uranium mining through a plurality of layers of expanding materials | |
| CN112343560A (en) | Fracturing and sand prevention combined process method for exploiting low-permeability reservoir natural gas hydrate | |
| CN110529089B (en) | Repeated fracturing method for open hole horizontal well | |
| CN109209299B (en) | Method for manufacturing artificial well wall by saturated filling of cemented gravel around well hole | |
| CN112360368B (en) | Oil well water plugging method | |
| CN106761548A (en) | Method for injecting plugging agent into thick oil layer to plug strong water washing strip by fracturing | |
| CN112431579B (en) | Preset small-diameter pipe internal fracturing device and method for side drilling well and small-hole well | |
| CN207131369U (en) | A kind of anti-channeling layer cementing unit | |
| CN113445944B (en) | Pollution-free sand prevention and yield increase method for oil well | |
| CN204041042U (en) | A kind of coiled tubing drag fracturing tubing string | |
| CN1133389A (en) | Artificial well-wall sand-proof technology for steam-injection thermal-recovery well of viscous crude oil | |
| CN112253074B (en) | Method for improving bridge plug pumping efficiency by deep horizontal well fracturing | |
| CN106639969A (en) | Plugging method for perforating well section of slim hole sidetracked well | |
| CN111594126A (en) | Sand-filling layered fracturing method for coiled tubing | |
| CN207131368U (en) | One kind packing bridge blinding bunch tube | |
| CN111963124B (en) | Method for increasing production by asynchronous driving and production through energy supplementing between horizontal well joints | |
| CN112696178A (en) | Sand prevention and precipitation method for high-water-content oil well | |
| CN108412442A (en) | A kind of disposable casing perforation completion mode |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |