CN103740353B - A kind of composite blockage relieving agent and tight sandstone reservoir fracturing production horizontal well composite blockage relieving method - Google Patents
A kind of composite blockage relieving agent and tight sandstone reservoir fracturing production horizontal well composite blockage relieving method Download PDFInfo
- Publication number
- CN103740353B CN103740353B CN201310689357.0A CN201310689357A CN103740353B CN 103740353 B CN103740353 B CN 103740353B CN 201310689357 A CN201310689357 A CN 201310689357A CN 103740353 B CN103740353 B CN 103740353B
- Authority
- CN
- China
- Prior art keywords
- fluid
- well
- water
- acid
- composite blockage
- 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.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
-
- 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
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing, limiting or eliminating the deposition of paraffins or like substances
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/32—Anticorrosion additives
Abstract
The invention discloses a kind of composite blockage relieving agent and tight sandstone reservoir fracturing production horizontal well composite blockage relieving method, this composite blockage relieving agent comprises pre-process liquid, main treatment solution, active blockages relieving fluid and subsequent fluid; Pre-process liquid is made up of organic acid, mineral acid, stablizer, oxygenant, sequestrant, inhibiter, polyol ethers, water; Main treatment solution is made up of organic acid, mineral acid, stablizer, oxygenant, fluorocarbon surfactant, water; Active blockages relieving fluid is made up of zwitterionics, stablizer, water; Subsequent fluid is water.Composite blockage relieving agent of the present invention, the releasing to conventional colloid, bituminous matter and inorganic solid phase particle plugging can not only be realized, and can targetedly solution dewater lock, emulsification of crude oil injury, there is retardative property advantage that is good, that effectively prevent the secondary sedimentation such as precipitation of iron ions and acid sludge generation from polluting simultaneously, efficient solution is except the nearly well of horizontal well and deep reservoir pollution, recover oil well productivity, greatly improve oil recovery factor.
Description
Technical field
The invention belongs to oilfield exploitation technical field, be specifically related to a kind of composite blockage relieving agent, also relate to a kind of tight sandstone reservoir fracturing production horizontal well composite blockage relieving method simultaneously.
Background technology
Sandstone Gas Reservoir has the feature that rate of permeation is low, pore throat is narrow and microfracture is comparatively grown, and in drilling process, drilling fluid is easily missed; The mode adopting staged fracturing of horizontal well to go into operation, also certainly will have large quantity of fluid to enter stratum; In operation process, reservoir is very easily subject to the injury of the external fluid that is incompatible, and simultaneously due to the impact of the factor such as temperature, pressure, easily causes wax, colloid, bituminous matter to deposit in immediate vicinity of wellbore, forms organic plugging; Contain inorganic or Organic Solid-Phase particle in a large number in working fluid, these particles enter stratum, cause borehole or the blocking of duct, stratum; Working fluid and resident fluid are incompatible, and make crude oil generation emulsification, change profit surface, interfacial tension, cause wettability reversal, and then cause water phase permeability to improve and permeability to oil reduction.Oil well productivity all can be caused to decline for these problems or oil well water production rate increases, oil offtake reduces.In the face of these problems, single cleanup additive or unblocking agent only can solve colloid, bituminous matter blocking or inorganic solid phase particle plugging, can not solve the other problemses such as water lock, emulsification, Assessment of Organic Pollution simultaneously, thus can not meet the requirement of use.
Tight sandstone reservoir due to its reservoir properties poor, adopt straight well exploitation show the problems such as single well productivity is low, production rate decline is fast.Along with the progress of horizontal well drilling and fracturing technique, staged fracturing of horizontal well technology has become the important means of exploitation tight sandstone reservoir, but due in operation process, a large amount of foreign liquid and reservoir directly contact and in fracturing process, liquid channelling all can cause reservoir pollution, cause production capacity to reduce.And reservoir suffers to pollute the effective control measures of rear shortage.Such as, the long 8 reservoir mean permeabilities 0.4 × 10 in oil field, Red River belonging to the branch office of China Petrochemical Industry North China
-3μm
2average pore 10.8%, for typical Sandstone Gas Reservoir, this oil field initial stage adopts straight well development mode, average individual well day, produce oil was lower than 1t, major part oil well belongs to low yield inefficient well, staged fracturing of horizontal well technology within 2010, is adopted to develop afterwards, average day at horizontal well initial stage, produce oil was greater than 8t, achieve good development effectiveness, but along with horizontal well scale development, occurred a collection of bore meet display good but after going into operation low yield poor efficiency and the condition of production good but alter by offset well pressure the well that rear output sharply declines.A large amount of appearance of these wells have become one of principal contradiction of restriction horizontal well development tight sandstone reservoir.Therefore, seek a kind of construct simple, low cost, suitable effective administering method, will directly have influence on the development effectiveness of tight sandstone reservoir horizontal well, raising oil recovery is had great significance.
Summary of the invention
The object of this invention is to provide a kind of composite blockage relieving agent, solve the problem that existing single unblocking agent can not meet service requirements.
Second object of the present invention is to provide a kind of tight sandstone reservoir fracturing production horizontal well composite blockage relieving method using above-mentioned composite blockage relieving agent.
In order to realize above object, the technical solution adopted in the present invention is: a kind of composite blockage relieving agent, comprises pre-process liquid, main treatment solution, active blockages relieving fluid and subsequent fluid;
Described pre-process liquid is made up of the component of following weight percent: organic acid 3.0% ~ 5.0%, mineral acid 6.0% ~ 10.0%, stablizer 2.0% ~ 5.0%, oxygenant 0.01% ~ 0.02%, sequestrant 0.5% ~ 2.0%, inhibiter 0.8% ~ 1.2%, polyol ethers 0.5% ~ 2.0%, and surplus is water;
Described main treatment solution is made up of the component of following weight percent: organic acid 1.0% ~ 3.0%, mineral acid 3.0% ~ 7.0%, stablizer 2.0% ~ 3.0%, oxygenant 0.01% ~ 0.02%, fluorocarbon surfactant 0.01% ~ 0.08%, and surplus is water;
Described active blockages relieving fluid is made up of the component of following weight percent: zwitterionics 1.0% ~ 3.0%, stablizer 2.0% ~ 3.0%, and surplus is water;
Described subsequent fluid is water;
Water in described pre-process liquid, main treatment solution, active blockages relieving fluid and the volume ratio of subsequent fluid are 35 ~ 50:80 ~ 90:110 ~ 120:20 ~ 30.
Described organic acid is acetic acid.
Described mineral acid is hydrochloric acid and hydrofluoric acid; In described pre-process liquid, the massfraction of hydrochloric acid is 3.0% ~ 5.0%, and the massfraction of hydrofluoric acid is 3.0% ~ 5.0%; In described main treatment solution, the massfraction of hydrochloric acid is 2.0% ~ 5.0%, and the massfraction of hydrofluoric acid is 1.0% ~ 2.0%.
Described stablizer is Repone K; Described oxygenant is ammonium persulphate.
Described fluorocarbon surfactant is both sexes fluorocarbon surfactant.
Described sequestrant is ethylenediamine tetraacetic acid (EDTA).
Described inhibiter is butynediol and alkylphenol polyoxyethylene; In described pre-process liquid, the massfraction of butynediol is 0.6% ~ 1%, and the massfraction of described alkylphenol polyoxyethylene is 0.2%.
Described polyol ethers is propylene glycol monomethyl ether.
Described zwitterionics is empgen BB.
Use a tight sandstone reservoir fracturing production horizontal well composite blockage relieving method for above-mentioned composite blockage relieving agent, comprise the following steps:
1) in well, flow string is proposed, under enter de-plugging operating tool string, dress well head;
2) adopt the mode of just squeezing, successively pre-process liquid, main treatment solution, active blockages relieving fluid, subsequent fluid are clamp-oned in well;
3), after closing well reaction 12 ~ 48h, open head valve, bleed off pressure;
4) in well, de-plugging operating tool string is tripped out.
Composite blockage relieving agent of the present invention, comprises pre-process liquid, main treatment solution, active blockages relieving fluid and subsequent fluid, wherein:
Pre-process liquid is the composite according to a certain percentage and composite treating agent using clear water to dilute of organic acid, mineral acid, stablizer, oxygenant, sequestrant, inhibiter and polyol ethers, well can remove the organic and inorganic blocking of horizontal section near wellbore and fracturing fluid pollution;
Main treatment solution is the composite according to a certain percentage and composite treating agent using clear water to dilute of organic acid, mineral acid, stablizer, oxygenant and tensio-active agent, well can remove the inner organic and inorganic blocking of reservoir, fracturing fluid pollution and solution and to dewater lock; There is the fluorocarbon surfactant of ultralow surface and interface tension force, well can remove the milk sap that working fluid and crude oil are formed, remove the blocking of organic deposition, reduce and return row pressure power, improve permeability to oil, recover oil well output;
Active blockages relieving fluid is the composite according to a certain percentage and composite treating agent using clear water to dilute of tensio-active agent and stablizer, there is the zwitterionics of ultralow surface and interface tension force, the milk sap that can remove and prevent working fluid and crude oil from being formed, prevent secondary pollution, effectively reduce and return row pressure power, improve permeability to oil, recover oil well output;
Subsequent fluid is clear water, and the object of injected clear water ensures that composite blockage relieving liquid fully enters oil reservoir deep, improves the validity of de-plugging.
Composite blockage relieving agent of the present invention, comprise pre-process liquid, main treatment solution, active blockages relieving fluid and subsequent fluid, the releasing to conventional colloid, bituminous matter and inorganic solid phase particle plugging can not only be realized, and can targetedly solution dewater lock, emulsification of crude oil injury, there is the advantage that retardative property is good, can effectively prevent the secondary sedimentation such as precipitation of iron ions and acid sludge generation from polluting simultaneously, efficient solution is except the nearly well of horizontal well and deep reservoir pollution, greatly improve oil recovery factor, be suitable for the releasing of ultralow permeable reservoir staged fracturing operation horizontal well reservoir pollution.
Tight sandstone reservoir fracturing production horizontal well composite blockage relieving method of the present invention, consider tight sandstone reservoir fracturing production horizontal well drilling, pressure break, pressure is altered and reservoir temperature, the pollution that pressure change causes reservoir, optimization of C/C composites, pointed use comprises pre-process liquid, main treatment solution, the composite blockage relieving agent of active blockages relieving fluid and subsequent fluid, adopt the mode that segmentation is injected, remove nearly well reservoir and deep reservoir water lock, emulsification of crude oil, the inorganic solid phase particle plugging on Assessment of Organic Pollution and stratum, in de-plugging process, effectively protect reservoir simultaneously, prevent secondary pollution, thus achieve releasing reservoir pollution efficiently, reduce horizontal well moisture, improve the object of per-well production, recover oil well productivity, the method is the stable yields of the tight sandstone reservoir adopting the mode of staged fracturing of horizontal well to develop and improves recovery ratio and provide strong technical guarantee, technique is simple, easy to operate, is applicable to applying.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated.
Embodiment 1
The composite blockage relieving agent of the present embodiment, comprises pre-process liquid, main treatment solution, active blockages relieving fluid and subsequent fluid;
Described pre-process liquid is made up of the component of following weight percent: acetic acid 3.0%, hydrochloric acid 3.0%, hydrofluoric acid 3.0%, Repone K 2.0%, ammonium persulphate 0.01%, ethylenediamine tetraacetic acid (EDTA) 0.5%, butynediol 0.6%, alkylphenol polyoxyethylene 0.2%, propylene glycol monomethyl ether 0.5%, and surplus is water; Water in pre-process liquid is 50m
3;
Described main treatment solution is made up of the component of following weight percent: acetic acid 1.0%, hydrochloric acid 2.0%, hydrofluoric acid 1.0%, Repone K 2.0%, ammonium persulphate 0.01%, both sexes fluorocarbon surfactant 0.01%, and surplus is water; Water in main treatment solution is 90m
3;
Described active blockages relieving fluid is made up of the component of following weight percent: empgen BB 1.0%, Repone K 2.0%, and surplus is water; Water in active blockages relieving fluid is 120m
3;
Described subsequent fluid is water, measures as 20m
3.
The tight sandstone reservoir fracturing production horizontal well composite blockage relieving method of the use composite blockage relieving agent of the present embodiment, comprises the following steps:
1) in well, flow string is proposed, under enter tieback sealing+
tieback oil pipe is to hanger position (1936.44m), and tieback is qualified, fills 350 type well heads,
annulus test between oil pipe and 7in sleeve pipe is to 5MPa, and it is qualified that pressure drop in 5 minutes is less than 0.5MPa; Connect surface pipeline, well head and surface pipeline pressure testing 25MPa, it is qualified that pressure drop in 15 minutes is less than 0.5MPa;
2) adopt the mode of just squeezing, successively pre-process liquid, main treatment solution, active blockages relieving fluid, subsequent fluid are clamp-oned in well;
3), after closing well reaction 24h, slowly open head valve, bleed off pressure;
4) in well, trip out de-plugging operating tool string, lower flow string is produced.
Embodiment 2
The composite blockage relieving agent of the present embodiment, comprises pre-process liquid, main treatment solution, active blockages relieving fluid and subsequent fluid;
Described pre-process liquid is made up of the component of following weight percent: acetic acid 5.0%, hydrochloric acid 5.0%, hydrofluoric acid 5.0%, Repone K 5.0%, ammonium persulphate 0.02%, ethylenediamine tetraacetic acid (EDTA) 2.0%, butynediol 1.0%, alkylphenol polyoxyethylene 0.2%, propylene glycol monomethyl ether 2.0%, and surplus is water; Water in pre-process liquid is 35m
3;
Described main treatment solution is made up of the component of following weight percent: acetic acid 3.0%, hydrochloric acid 5.0%, hydrofluoric acid 2.0%, Repone K 3.0%, ammonium persulphate 0.02%, both sexes fluorocarbon surfactant 0.08%, and surplus is water; Water in main treatment solution is 80m
3;
Described active blockages relieving fluid is made up of the component of following weight percent: empgen BB 3.0%, Repone K 3.0%, and surplus is water; Water in active blockages relieving fluid is 120m
3;
Described subsequent fluid is water, measures as 20m
3.
The tight sandstone reservoir fracturing production horizontal well composite blockage relieving method of the use composite blockage relieving agent of the present embodiment, comprises the following steps:
1) in well, flow string is proposed, under enter tieback sealing+
tieback oil pipe is to hanger position (1977.97m), and tieback is qualified, fills 350 type well heads,
annulus test between oil pipe and 7in sleeve pipe is to 5MPa, and it is qualified that pressure drop in 5 minutes is less than 0.5MPa; Connect surface pipeline, well head and surface pipeline pressure testing 25MPa, it is qualified that pressure drop in 15 minutes is less than 0.5MPa;
2) adopt the mode of just squeezing, successively pre-process liquid, main treatment solution, active blockages relieving fluid, subsequent fluid are clamp-oned in well;
3), after closing well reaction 24h, slowly open head valve, bleed off pressure;
4) in well, trip out de-plugging operating tool string, lower flow string is produced.
Embodiment 3
The composite blockage relieving agent of the present embodiment, comprises pre-process liquid, main treatment solution, active blockages relieving fluid and subsequent fluid;
Described pre-process liquid is made up of the component of following weight percent: acetic acid 4.0%, hydrochloric acid 4.0%, hydrofluoric acid 4.0%, Repone K 3.5%, ammonium persulphate 0.02%, ethylenediamine tetraacetic acid (EDTA) 1.2%, butynediol 0.8%, alkylphenol polyoxyethylene 0.2%, propylene glycol monomethyl ether 1.2%, and surplus is water; Water in pre-process liquid is 40m
3;
Described main treatment solution is made up of the component of following weight percent: acetic acid 2.0%, hydrochloric acid 3.5%, hydrofluoric acid 1.5%, Repone K 2.5%, ammonium persulphate 0.01%, both sexes fluorocarbon surfactant 0.05%, and surplus is water; Water in main treatment solution is 85m
3;
Described active blockages relieving fluid is made up of the component of following weight percent: empgen BB 1.5%, Repone K 2.5%, and surplus is water; Water in active blockages relieving fluid is 115m
3;
Described subsequent fluid is water, measures as 20m
3.
The tight sandstone reservoir fracturing production horizontal well composite blockage relieving method of the use composite blockage relieving agent of the present embodiment, comprises the following steps:
1) in well, flow string is proposed, under enter tieback sealing+
tieback oil pipe is to hanger position (1965.12m), and tieback is qualified, fills 350 type well heads,
annulus test between oil pipe and 7in sleeve pipe is to 5MPa, and it is qualified that pressure drop in 5 minutes is less than 0.5MPa; Connect surface pipeline, well head and surface pipeline pressure testing 25MPa, it is qualified that pressure drop in 15 minutes is less than 0.5MPa;
2) adopt the mode of just squeezing, successively pre-process liquid, main treatment solution, active blockages relieving fluid, subsequent fluid are clamp-oned in well;
3), after closing well reaction 24h, slowly open head valve, bleed off pressure; 4) in well, trip out de-plugging operating tool string, lower flow string is produced.
Claims (2)
1. a composite blockage relieving agent, is characterized in that: comprise pre-process liquid, main treatment solution, active blockages relieving fluid and subsequent fluid;
Described pre-process liquid is made up of the component of following weight percent: organic acid 3.0% ~ 5.0%, mineral acid 6.0% ~ 10.0%, stablizer 2.0% ~ 5.0%, oxygenant 0.01% ~ 0.02%, sequestrant 0.5% ~ 2.0%, inhibiter 0.8% ~ 1.2%, polyol ethers 0.5% ~ 2.0%, and surplus is water;
Described main treatment solution is made up of the component of following weight percent: organic acid 1.0% ~ 3.0%, mineral acid 3.0% ~ 7.0%, stablizer 2.0% ~ 3.0%, oxygenant 0.01% ~ 0.02%, fluorocarbon surfactant 0.01% ~ 0.08%, and surplus is water;
Described active blockages relieving fluid is made up of the component of following weight percent: zwitterionics 1.0% ~ 3.0%, stablizer 2.0% ~ 3.0%, and surplus is water;
Described subsequent fluid is water;
Water in described pre-process liquid, main treatment solution, active blockages relieving fluid and the volume ratio of subsequent fluid are 35 ~ 50:80 ~ 90:110 ~ 120:20 ~ 30;
Wherein, described organic acid is acetic acid;
Described mineral acid is hydrochloric acid and hydrofluoric acid; In described pre-process liquid, the massfraction of hydrochloric acid is 3.0% ~ 5.0%, and the massfraction of hydrofluoric acid is 3.0% ~ 5.0%; In described main treatment solution, the massfraction of hydrochloric acid is 2.0% ~ 5.0%, and the massfraction of hydrofluoric acid is 1.0% ~ 2.0%;
Described stablizer is Repone K; Described oxygenant is ammonium persulphate;
Described sequestrant is ethylenediamine tetraacetic acid (EDTA);
Described fluorocarbon surfactant is both sexes fluorocarbon surfactant;
Described inhibiter is butynediol and alkylphenol polyoxyethylene; In described pre-process liquid, the massfraction of butynediol is 0.6% ~ 1.0%, and the massfraction of described alkylphenol polyoxyethylene is 0.2%;
Described polyol ethers is propylene glycol monomethyl ether;
Described zwitterionics is empgen BB.
2. use a tight sandstone reservoir fracturing production horizontal well composite blockage relieving method for composite blockage relieving agent as claimed in claim 1, it is characterized in that: comprise the following steps:
1) in well, flow string is proposed, under enter de-plugging operating tool string, dress well head;
2) adopt the mode of just squeezing, successively pre-process liquid, main treatment solution, active blockages relieving fluid, subsequent fluid are clamp-oned in well;
3), after closing well reaction 12 ~ 48h, open head valve, bleed off pressure;
4) in well, de-plugging operating tool string is tripped out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310689357.0A CN103740353B (en) | 2013-12-16 | 2013-12-16 | A kind of composite blockage relieving agent and tight sandstone reservoir fracturing production horizontal well composite blockage relieving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310689357.0A CN103740353B (en) | 2013-12-16 | 2013-12-16 | A kind of composite blockage relieving agent and tight sandstone reservoir fracturing production horizontal well composite blockage relieving method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103740353A CN103740353A (en) | 2014-04-23 |
| CN103740353B true CN103740353B (en) | 2016-02-03 |
Family
ID=50497422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310689357.0A Active CN103740353B (en) | 2013-12-16 | 2013-12-16 | A kind of composite blockage relieving agent and tight sandstone reservoir fracturing production horizontal well composite blockage relieving method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103740353B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106893569A (en) * | 2017-03-01 | 2017-06-27 | 徐小虎 | A kind of pit shaft de-plugging agent for repairing gas well reservoir permeability |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105647497A (en) * | 2014-11-10 | 2016-06-08 | 中国石油化工股份有限公司 | Blockage relieving system and method suitable for oil well composite damages |
| CN105754569B (en) * | 2014-12-16 | 2018-09-04 | 中国石油天然气股份有限公司 | A kind of low-permeability oil deposit water injection well pretreating agent and preparation method thereof |
| CN104612650B (en) * | 2014-12-31 | 2017-07-07 | 中国石油天然气股份有限公司 | For the oxidisability Compound-acid deep acidification method for removing blockage of water filling well acidizing de-plugging |
| CN104830298B (en) * | 2015-04-03 | 2017-11-10 | 湖北汉科新技术股份有限公司 | A kind of water-base emulsion composite blockage relieving agent |
| CN105419760B (en) * | 2015-12-09 | 2018-03-09 | 中国石油天然气股份有限公司 | A kind of polynary Synergistic type de-plugging agent |
| CN106367054B (en) * | 2016-07-29 | 2019-09-24 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of Xie Shui lock agent and preparation method |
| CN106868491B (en) * | 2016-12-26 | 2019-02-01 | 安徽宝恒新材料科技有限公司 | A method of enhancing steel surface snearing performance |
| CN107142095B (en) * | 2017-05-17 | 2020-04-24 | 成都百联油田技术服务有限公司 | Blocking remover and preparation method thereof |
| CN108343398B (en) * | 2017-11-27 | 2023-02-28 | 中国石油天然气股份有限公司 | Oil well scale prevention method |
| CN108278098A (en) * | 2018-01-05 | 2018-07-13 | 中国石油天然气股份有限公司 | A kind of gas field pit shaft method for removing blockage |
| CN108865093B (en) * | 2018-05-23 | 2021-04-06 | 克拉玛依市红都有限责任公司 | Infiltration-increasing blockage removing fluid for uranium mine and using method and application thereof |
| CN108822819A (en) * | 2018-06-14 | 2018-11-16 | 兰州凯宏中原石油科技有限公司 | A kind of super low percolation oilfield oil-water well combined removing plug by acid liquid |
| CN109083621A (en) * | 2018-07-28 | 2018-12-25 | 中国石油天然气股份有限公司 | A kind of horizontal well coiled tubing composite blockage relieving method |
| CN109181669A (en) * | 2018-10-18 | 2019-01-11 | 陕西新奥石油工程有限公司 | A kind of mating medicament and technique releasing reservoir water lock, blocking |
| CN111502598A (en) * | 2019-01-31 | 2020-08-07 | 中国石油天然气股份有限公司 | Acidification blockage removing method |
| CN112111258B (en) * | 2019-06-19 | 2022-12-06 | 中国石油化工股份有限公司 | Water-lock injury blocking remover, use method thereof and water-lock injury acidizing fluid |
| CN111303857B (en) * | 2020-03-09 | 2021-07-27 | 西安均德石油工程技术有限公司 | Microemulsion single-step acid for oil well and preparation method and application thereof |
| CN113494272A (en) * | 2020-03-18 | 2021-10-12 | 中国石油天然气股份有限公司 | Composite blockage removing method and device for high-pressure gas well |
| CN111997576A (en) * | 2020-09-01 | 2020-11-27 | 山东青洁能环保有限公司 | Supermolecule microcosmic blockage removing method for stratum reconstruction of oil and gas field |
| CN112228008A (en) * | 2020-10-17 | 2021-01-15 | 濮阳市华瑞通能源工程技术有限公司 | Oil well blockage removing method for seriously-scaled shaft |
| CN114854384A (en) * | 2021-02-03 | 2022-08-05 | 中国石油天然气股份有限公司 | Blocking remover system and blocking removing method |
| CN115873572A (en) * | 2022-12-10 | 2023-03-31 | 庆阳华宇石油工程技术有限公司 | Deep penetration cleaning retarding acid deblocking agent and acidification deblocking method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1483920A (en) * | 2002-09-17 | 2004-03-24 | 张学锋 | Agent for acidizing sandstone oil reservoir |
| CN101037933A (en) * | 2007-03-31 | 2007-09-19 | 中国石油大学(华东) | Scale and corrosion inhibition method combining chemical huff and puff with water-shutoff |
| CN101608110A (en) * | 2009-07-16 | 2009-12-23 | 西安晶达化工有限公司 | A kind of composite blockage relieving agent and using method thereof |
| CN101955770A (en) * | 2010-05-14 | 2011-01-26 | 北京奥凯立科技发展股份有限公司 | Main acid for oil well drilling and multi-hydrogen acid acidulating system with main acid |
| CN102828734A (en) * | 2012-09-13 | 2012-12-19 | 西南石油大学 | Offshore oilfield water injection well online one-step-process acidification technology |
| CN103343675A (en) * | 2013-07-18 | 2013-10-09 | 中国海洋石油总公司 | Compound plug removal technological method for offshore oil field injection well |
-
2013
- 2013-12-16 CN CN201310689357.0A patent/CN103740353B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1483920A (en) * | 2002-09-17 | 2004-03-24 | 张学锋 | Agent for acidizing sandstone oil reservoir |
| CN101037933A (en) * | 2007-03-31 | 2007-09-19 | 中国石油大学(华东) | Scale and corrosion inhibition method combining chemical huff and puff with water-shutoff |
| CN101608110A (en) * | 2009-07-16 | 2009-12-23 | 西安晶达化工有限公司 | A kind of composite blockage relieving agent and using method thereof |
| CN101955770A (en) * | 2010-05-14 | 2011-01-26 | 北京奥凯立科技发展股份有限公司 | Main acid for oil well drilling and multi-hydrogen acid acidulating system with main acid |
| CN102828734A (en) * | 2012-09-13 | 2012-12-19 | 西南石油大学 | Offshore oilfield water injection well online one-step-process acidification technology |
| CN103343675A (en) * | 2013-07-18 | 2013-10-09 | 中国海洋石油总公司 | Compound plug removal technological method for offshore oil field injection well |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106893569A (en) * | 2017-03-01 | 2017-06-27 | 徐小虎 | A kind of pit shaft de-plugging agent for repairing gas well reservoir permeability |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103740353A (en) | 2014-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103740353B (en) | A kind of composite blockage relieving agent and tight sandstone reservoir fracturing production horizontal well composite blockage relieving method | |
| CN107255027B (en) | Compound modification method for carbonate rock reservoir | |
| CN102828734B (en) | Offshore oilfield water injection well online one-step-process acidification technology | |
| CN100516457C (en) | Chemical pulse compound unplugging method | |
| CN105255466A (en) | Slow blockage removing agent for oil well and blockage removing method | |
| CN106566511B (en) | A kind of surfactant micellar oil displacement agent | |
| CN107575183B (en) | Process is made in a kind of tune-uncoupling for water injection well | |
| CN102587873B (en) | Carbon oxide huff-n-puff, water control and oil increment method for horizontal well | |
| CN101353958A (en) | Acid fracturing process of oil gas well mining temperature control various mucic acid | |
| US11174425B2 (en) | Carbonate reservoir filtration-loss self-reducing acid | |
| CN101158280A (en) | Oil well high water-bearing layer pressure blocking method | |
| CN100549126C (en) | Preposition acid solution and preposition sour sandfrac method | |
| CN108822819A (en) | A kind of super low percolation oilfield oil-water well combined removing plug by acid liquid | |
| CN103937475A (en) | Carbon dioxide acidification blocking remover and process of not reversely discharging raffinate after acidification | |
| CN108049855A (en) | A kind of MH acid construction technology suitable for sandstone reservoir transformation | |
| CN104762072A (en) | Penetrating selective plugging agent and preparation method and application method thereof | |
| CN104265254A (en) | Oil production technological method for multi-stage plug injection of oil-soluble viscosity reducer and liquid CO2 in deep super-heavy oil | |
| CN106837284A (en) | A kind of pressure break connection of handling up for improving Recovery Factor of Low-Permeability Reservoirs makees method | |
| CN104695895A (en) | Plugging method integrating channel blocking and leakage plugging | |
| CN112343560A (en) | Fracturing and sand prevention combined process method for exploiting low-permeability reservoir natural gas hydrate | |
| CN110118079B (en) | Fracturing exploitation method for high-wax-content oil layer | |
| CN102767353A (en) | Comprehensive mining technology of drowned well | |
| CN114059980B (en) | Shale reservoir fracturing method | |
| CN113882841A (en) | Nano-system composite CO2Method for improving oil well productivity through huff and puff | |
| CN104629712A (en) | Deep acidizing acid liquor and deep acidizing method of low-permeability sandstone reservoir |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |