CN104533369B - Method for relieving barite blockage of oil gas well - Google Patents
Method for relieving barite blockage of oil gas well Download PDFInfo
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- CN104533369B CN104533369B CN201410631164.4A CN201410631164A CN104533369B CN 104533369 B CN104533369 B CN 104533369B CN 201410631164 A CN201410631164 A CN 201410631164A CN 104533369 B CN104533369 B CN 104533369B
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- barite
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- working solution
- relieving
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- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 title claims abstract description 49
- 239000010428 baryte Substances 0.000 title claims abstract description 49
- 229910052601 baryte Inorganic materials 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000012224 working solution Substances 0.000 claims abstract description 26
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 14
- 239000002253 acid Substances 0.000 claims abstract description 9
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 9
- 239000011780 sodium chloride Substances 0.000 claims abstract description 7
- YIOJGTBNHQAVBO-UHFFFAOYSA-N dimethyl-bis(prop-2-enyl)azanium Chemical class C=CC[N+](C)(C)CC=C YIOJGTBNHQAVBO-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000002791 soaking Methods 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 230000007797 corrosion Effects 0.000 claims description 9
- 238000005260 corrosion Methods 0.000 claims description 9
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 8
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 6
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 claims description 6
- 159000000000 sodium salts Chemical class 0.000 claims description 6
- 238000001802 infusion Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N toluene Substances CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims description 2
- 238000002513 implantation Methods 0.000 claims description 2
- QLNJFJADRCOGBJ-UHFFFAOYSA-N propionamide Chemical compound CCC(N)=O QLNJFJADRCOGBJ-UHFFFAOYSA-N 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims 1
- PYGSKMBEVAICCR-UHFFFAOYSA-N hexa-1,5-diene Chemical group C=CCCC=C PYGSKMBEVAICCR-UHFFFAOYSA-N 0.000 claims 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract description 13
- ZDYVRSLAEXCVBX-UHFFFAOYSA-N pyridinium p-toluenesulfonate Chemical compound C1=CC=[NH+]C=C1.CC1=CC=C(S([O-])(=O)=O)C=C1 ZDYVRSLAEXCVBX-UHFFFAOYSA-N 0.000 abstract description 3
- 230000008439 repair process Effects 0.000 abstract 1
- SUAMAHKUSIHRMR-UHFFFAOYSA-M sodium;2-oxobutanoate Chemical compound [Na+].CCC(=O)C([O-])=O SUAMAHKUSIHRMR-UHFFFAOYSA-M 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 description 12
- 239000012530 fluid Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 5
- -1 It is embodied in: 1 Chemical compound 0.000 description 4
- 239000002270 dispersing agent Substances 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 239000007790 solid phase Substances 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- IGFHQQFPSIBGKE-UHFFFAOYSA-N 4-nonylphenol Chemical compound CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 description 2
- DLFVBJFMPXGRIB-UHFFFAOYSA-N Acetamide Chemical compound CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Natural products OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 239000002798 polar solvent Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OSNIIMCBVLBNGS-UHFFFAOYSA-N 1-(1,3-benzodioxol-5-yl)-2-(dimethylamino)propan-1-one Chemical compound CN(C)C(C)C(=O)C1=CC=C2OCOC2=C1 OSNIIMCBVLBNGS-UHFFFAOYSA-N 0.000 description 1
- YEYKMVJDLWJFOA-UHFFFAOYSA-N 2-propoxyethanol Chemical compound CCCOCCO YEYKMVJDLWJFOA-UHFFFAOYSA-N 0.000 description 1
- PXRKCOCTEMYUEG-UHFFFAOYSA-N 5-aminoisoindole-1,3-dione Chemical compound NC1=CC=C2C(=O)NC(=O)C2=C1 PXRKCOCTEMYUEG-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 229960000583 acetic acid Drugs 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 150000001361 allenes Chemical class 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- KVBCYCWRDBDGBG-UHFFFAOYSA-N azane;dihydrofluoride Chemical compound [NH4+].F.[F-] KVBCYCWRDBDGBG-UHFFFAOYSA-N 0.000 description 1
- DTPCFIHYWYONMD-UHFFFAOYSA-N decaethylene glycol Polymers OCCOCCOCCOCCOCCOCCOCCOCCOCCOCCO DTPCFIHYWYONMD-UHFFFAOYSA-N 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012362 glacial acetic acid Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004530 micro-emulsion Substances 0.000 description 1
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000003921 particle size analysis Methods 0.000 description 1
- DPBLXKKOBLCELK-UHFFFAOYSA-N pentan-1-amine Chemical compound CCCCCN DPBLXKKOBLCELK-UHFFFAOYSA-N 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 150000003738 xylenes Chemical class 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Lubricants (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention relates to a method for relieving barite blockage of an oil gas well. The method for relieving the barite blockage of the oil gas well includes steps that (1) preparing working solution, wherein the working solution includes 1-1.2% of nitrilortiacetic acid, 1-1.2% of pyridinium toluene-4-sulphonate, 0.3-0.8% of 2-ketobutyric acid sodium salt, 1-1.5% of sodium chloride, 1-1.2% of chlorinated poly dimethyl diallyl ammonium and 0.1-0.2% of polyacrylamide by weight; (2) opening the well for gushing, calculating original capacity, and recording an oil pressure observed before relieving the blockage; (3) filling the working solution of the step (1) for dispersing and corroding the barite from an oil pipe under a high pressure according to the flow rate of 2-4 cubic meters per minute, adding 200 to 300 cubic meters, closing the well, soaking and reacting for 4 hours at 100 to 160 degrees centigrade, and filling the working solution under open cracks; (4) opening the well for gushing, flowing back, and calculating the capacity after relieving the blockage. The method for relieving the barite blockage is capable of relieving the pollution of the barite to the near bore zones in the oil gas well drilling, completion and repair process and recovering a target oil gas layer leakage channel through corroding and dispersing the barite.
Description
This application is to release Oil/gas Well barite obstruction method and the divisional application of working solution used, former Shen
Please applying date 2013-12-24, original applying number: 2013107222906, invention and created name: release Oil/gas Well
Barite obstruction method and the working solution used.
Technical field
The invention belongs to energy industry, oil-gas field development field, for well production increment, especially a kind of releasing
Oil/gas Well barite obstruction method and the working solution used.
Background technology
Along with marine and land oilfield prospecting developing develop in depth, deep-well, ultradeep well probing quantity increases,
High density heavy weight additive is increasingly made an addition in drilling fluid by universal, but the addition of heavy weight additive makes mud solid phase contain
Amount increases, and causes occurring heavy weight additive sedimentation to invade in drilling process, causes stratum solid phase blocking, even serious shadow
Ring oil well output.
Barite is solid phase weighting material common in drilling fluid, and reservoir is easily damaged by barite, mainly
It is embodied in: 1, Severe blockage seepage flow duct, pollutes stratum, affect yield and recovery ratio；2, cause and misdeem
By mistake, it is impossible to identification of hydrocarbon layer；3, extremely difficult releasing, uses general acid washing method to remove.
Being always a difficult problem in industry for the releasing of above-mentioned barite, existing acid washing method can not reach to remove
Purpose, this problems demand solves.
According to retrieval, finding following patent documentation, specific disclosure is as follows:
1, a kind of barite reclaimed in weighted drilling fluid get rid of the system of useless solid phase
(CN200710098877.9), including: prime centrifuge and rear class centrifuge, pending drilling fluid is through front
Level centrifuge is by brilliant for weight, and after stone is separated, the drilling fluid being separated barite again will through rear class centrifuge
Cutting grain is separated, and the drilling fluid obtained mixes with the barite being previously separated out.This invention is by one
Two desk centrifuges are connected in series together, process drilling fluid in two steps, solve simultaneously by the system of set organic connections
Weighted drilling fluid of having determined process in barite high efficiency separation, barite reclaim dispersion, prevent barite precipitation,
Improve the problems such as weighted drilling fluid treatment effeciency, while reclaiming most of barites, most of rock of having drained
Bits granule, greatly reduces the consumption of barite, had both saved cost, and also protected environment.
2, a kind of Wellbore of Gas Wells de-plugging agent (CN102746838A), by being weight percentage: ether compound:
5～25%；Dispersant: 0.5～10%；Abluent: 1～10%；Chelating agen: 0.5～5%, nitrogenous class
Polar solvent: surplus；Described nitrogenous class polar solvent is selected from DMF, N, N dimethyl
One of acetamide, N-Methyl pyrrolidone；Described ether compound be glycol-ether, ethylene glycol-propyl ether,
One of ethylene glycol-ether or carbitol；Described dispersant is kerosene, water, surfactant, helps surface
The middle microemulsion phase type dispersant that activating agent is mixed to form, in dispersant, particle size analysis is 20～100nm；Described
Abluent is one of allene diamidogen, acetonitrile, amylamine；Described chelating agen is one of sodium citrate, EDTA.
3, a kind of oil reservoir de-plugging agent (CN102775975A), including A agent, B agent, A agent weight percent
Ratio 25～35%；The percentage by weight 65～75% of B agent；Each component percentage by weight sum is absolutely；
A agent each component percentage by weight is: oil mixed xylenes: 45～50%；Nonylphenol polyoxyethylenes (4)
Ether (OP-4): 1～2%；Remaining is No. 0 diesel oil；A agent each component percentage by weight sum is absolutely；
B agent each component percentage by weight is: glacial acetic acid or sulfamic acid: 6～10%；Ammonium acid fluoride: 2～2.5%；
Ammonium chloride: 2%；Citric acid: 1～2%；Corrosion inhibiter 7801:1.5～2%；The tert-butyl alcohol: 3～5%；Pungent
Base phenol polyoxyethylene (10) ether (OP-10): 0.5～1%；Remaining is water；B agent each component percentage by weight
Sum is absolutely.
Above-mentioned patent does not has to solve for the blockage problem of barite, different from present invention theme,
Technical scheme is different, it is thus achieved that technique effect different.
Summary of the invention
It is an object of the invention to provide a kind of Oil/gas Well barite obstruction method that releases, the blocking of this releasing barite
Method can pass through corrosion, dispersion barite, releases the barite pollution near wellbore zone in Oil/gas Well drilling process,
Recover purpose oil reservoir air infiltration circulation road.
The technical scheme that the present invention realizes purpose is as follows:
A kind of releasing Oil/gas Well barite obstruction method, step is as follows:
(1) configuration barite de-plugging working solution: its composition and weight percent concentration be: nitrilotriacetic acid
1.0-1.2%, 4-toluene sulfonic acide pyridine 1.0-1.2%, 2-butanone acid sodium-salt 0.3-0.8%, sodium chloride 1.0-1.5%,
Polychloride dimethyldiallylammonium 1.0-1.2% and polyacrylamide 0.1-0.2%；
(2) drive a well open flow, asks for the information such as original production capacity, the oil pressure observed before record de-plugging and oil and gas production；
The most at elevated pressures, from oil pipe implantation step (1) in there is dispersion, the working solution of corrosion barite,
Infusion flow is 2-4m3/ min, adds 200m3-300m3, closing well soaks reaction 4 hours, soaking temperature
100-160 DEG C, under conditions of fracture open, inject barite de-plugging working solution；
(4) drive a well control open flow, the row of returning, and asks for production capacity after de-plugging.
And, working solution de-plugging construction infusion condition requires to make formation fracture fully open.
And, described working solution is weight percentage: nitrilotriacetic acid 1.0%, 4-toluene sulfonic acide pyridine 1.0%,
2-butanone acid sodium-salt 0.5%, sodium chloride 1.0%, polychloride dimethyldiallylammonium 1.0% and polyacrylamide
0.1%.
And, described polyacrylamide is the poly-propionic acid amide. of straight chain..
The innovative point of the present invention have following some:
1, the present invention uses releasing barite obstruction method can pass through corrosion, dispersion barite, releases Oil/gas Well
In drilling process, barite is in the pollution of near wellbore zone, recovers purpose oil reservoir air infiltration circulation road.
2, this method can process the barite in stratum effectively, releases the barite blocking to stratum, effectively
Ground improves the seepage environment on stratum, finally makes Oil/gas Well oil and gas production be increased.
3, the present invention uses brand-new dispersion, the working solution of corrosion barite, and working solution can be by crack
Barite corrosion, then oil in release bottom, improves the yield of oil.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further described, and following embodiment is illustrative, is not to limit
Property, it is impossible to limit protection scope of the present invention with following embodiment.
All substances of the present invention are commercially available.
Embodiment 1
A kind of releasing Oil/gas Well barite obstruction method, step is as follows:
(1) configure working solution: its composition and weight percent concentration be: nitrilotriacetic acid (NTA) 1.0%, 4-methyl
Benzenesulfonic acid pyridine 1.0%, 2-butanone acid sodium-salt 0.5%, sodium chloride 1.0%, polychloride dimethyldiallylammonium
(PDDA) 1.0%, polyacrylamide 0.1%；
(2) drive a well open flow, asks for original production capacity, the oil pressure observed before record de-plugging；
After note: record oil pressure is easy to after de-plugging construct, with de-plugging, production capacity contrasts, evaluation plugging removal effect.
The most at elevated pressures, there is dispersion, the working solution of corrosion barite, flow in injecting (1) from oil pipe
For 2-4m3/ min, adds 200m3-300m3, closing well soaks and reacts 4 hours, soaking temperature 100-160 DEG C,
Working solution is injected under conditions of fracture open；
The pressure used generally greater than is drilled well bottom pressure, and the most slightly above fracture open pressure, exceeds about
3-5MPa, the general 90-110MPa of bottom pressure.
Inject working solution at elevated pressures, primarily to inject work under the conditions of intrinsic fracture opens as far as possible
Liquid, allows de-plugging agent primarily enter in contaminated intrinsic fracture so that it is to be fully contacted with barite, work progress
Parameter during the middle precise amounts needing admission squeezing working solution and squeezing, including: pump pressure, discharge capacity,
Beginning and ending time, abnormal conditions etc., the well head pressure change during the reaction of accurate recording closing well, well opening time, oil
Casing pressure change, abnormal conditions etc..
(4) drive a well control open flow, the row of returning, and asks for production capacity after de-plugging, carries out plugging removal effect evaluation, through present treatment
After, production capacity improves 100%.
How to judge plugging removal effect:
Such as: observe oil pressure before de-plugging, if oil pressure is within 10MPa, after de-plugging, become more than 10MPa,
After de-plugging, yield increases than yield before de-plugging, de-plugging success.
Embodiment 2
A kind of releasing Oil/gas Well barite obstruction method, step is as follows:
(1) configure working solution: its composition and weight percent concentration be: nitrilotriacetic acid (NTA) 1.0%, 4-methyl
Benzenesulfonic acid pyridine 1.0%, 2-butanone acid sodium-salt 0.5%, sodium chloride 1.0%, polychloride dimethyldiallylammonium
1.0%, linear polyacrylamide 0.1%；
(2) drive a well open flow, asks for original production capacity, the oil pressure observed before record de-plugging；
After note: record oil pressure is easy to after de-plugging construct, with de-plugging, production capacity contrasts, evaluation plugging removal effect.
The most at elevated pressures, there is dispersion, the working solution of corrosion barite, flow in injecting (1) from oil pipe
For 2-4m3/ min, adds 200m3-300m3, closing well soaks and reacts 4 hours, soaking temperature 100-160 DEG C,
Working solution is injected under conditions of fracture open；
The pressure used generally greater than is drilled well bottom pressure, and the most slightly above fracture open pressure, exceeds about
3-5MPa, the general 90-110MPa of bottom pressure.
(4) drive a well control open flow, the row of returning, and asks for production capacity after de-plugging, carries out plugging removal effect evaluation, through present treatment
After, production capacity improves 200%.
Claims (4)
1. one kind releases Oil/gas Well barite obstruction method, it is characterised in that: step is as follows:
(1) configuration barite de-plugging working solution: its composition and weight percent concentration be: nitrilotriacetic acid 1.0-1.2%,
4-toluene sulfonic acide pyridine 1.0-1.2%, 2-butanone acid sodium-salt 0.3-0.8%, sodium chloride 1.0-1.5%, polychloride two
Methyl diallyl ammonium 1.0-1.2% and polyacrylamide 0.1-0.2%；
(2) drive a well open flow, asks for original production capacity, the oil pressure observed before record de-plugging and oil and gas production information；
The most at elevated pressures, from oil pipe implantation step (1) in there is dispersion, the working solution of corrosion barite,
Infusion flow is 2-4m3/ min, adds 200m3-300m3, closing well soaks reaction 4 hours, soaking temperature
100-160 DEG C, under conditions of fracture open, inject barite de-plugging working solution；
(4) drive a well control open flow, the row of returning, and asks for production capacity after de-plugging.
Releasing Oil/gas Well barite obstruction method the most according to claim 1, it is characterised in that: work
Lyolysis stifled construction infusion condition requires to make formation fracture fully open.
Releasing Oil/gas Well barite obstruction method the most according to claim 1, it is characterised in that: described
Working solution is weight percentage: nitrilotriacetic acid 1.0%, 4-toluene sulfonic acide pyridine 1.0%, 2-butanone acid sodium-salt
0.5%, sodium chloride 1.0%, polychloride dimethyldiallylammonium 1.0% and polyacrylamide 0.1%.
Releasing Oil/gas Well barite obstruction method the most according to claim 1, it is characterised in that: described
Polyacrylamide is the poly-propionic acid amide. of straight chain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410631164.4A CN104533369B (en) | 2013-12-24 | 2013-12-24 | Method for relieving barite blockage of oil gas well |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310722290.6A CN103670360B (en) | 2013-12-24 | 2013-12-24 | Working solution for removing oil-gas well barite blocking |
| CN201410631164.4A CN104533369B (en) | 2013-12-24 | 2013-12-24 | Method for relieving barite blockage of oil gas well |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310722290.6A Division CN103670360B (en) | 2013-12-24 | 2013-12-24 | Working solution for removing oil-gas well barite blocking |
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| Publication Number | Publication Date |
|---|---|
| CN104533369A CN104533369A (en) | 2015-04-22 |
| CN104533369B true CN104533369B (en) | 2017-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410631164.4A Active CN104533369B (en) | 2013-12-24 | 2013-12-24 | Method for relieving barite blockage of oil gas well |
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| CN114837619B (en) * | 2021-02-01 | 2024-04-30 | 中国石油天然气股份有限公司 | Method and device for removing blockage of gas well |
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| CN102278092A (en) * | 2011-07-12 | 2011-12-14 | 西安石油大学 | Biological enzyme blocking removal process for blocking of inorganic scaling contained in strata |
| CN102337111A (en) * | 2011-07-12 | 2012-02-01 | 西安石油大学 | Bio-enzyme blockage removal production promoter and application thereof |
| CN102746838A (en) * | 2011-04-22 | 2012-10-24 | 中国石油天然气股份有限公司 | Blocking remover of gas well shaft |
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| RU2095546C1 (en) * | 1997-02-18 | 1997-11-10 | Закрытое акционерное общество "Нефть Заволжья" | Method for treatment of wells |
| CN101418680A (en) * | 2007-10-23 | 2009-04-29 | 王长俊 | Gas lift unblocking technology by chemical method |
| CN102746838A (en) * | 2011-04-22 | 2012-10-24 | 中国石油天然气股份有限公司 | Blocking remover of gas well shaft |
| CN102278092A (en) * | 2011-07-12 | 2011-12-14 | 西安石油大学 | Biological enzyme blocking removal process for blocking of inorganic scaling contained in strata |
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