CN105602543A - Acid fracturing temporary plugging agent and preparation method thereof - Google Patents
Acid fracturing temporary plugging agent and preparation method thereof Download PDFInfo
- Publication number
- CN105602543A CN105602543A CN201510696920.6A CN201510696920A CN105602543A CN 105602543 A CN105602543 A CN 105602543A CN 201510696920 A CN201510696920 A CN 201510696920A CN 105602543 A CN105602543 A CN 105602543A
- Authority
- CN
- China
- Prior art keywords
- copolymer
- acid fracturing
- temporary plugging
- agent
- plugging agent
- 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
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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/72—Eroding chemicals, e.g. acids
- C09K8/725—Compositions containing polymers
-
- 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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/5083—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/5086—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/72—Eroding chemicals, e.g. acids
- C09K8/74—Eroding chemicals, e.g. acids combined with additives added for specific purposes
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Polyesters Or Polycarbonates (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to an acid fracturing temporary plugging agent and a preparation method thereof, and belongs to the technical field of oilfield chemistry. The acid fracturing temporary plugging agent is prepared through mixing, by mass, 25-35% of a polyester copolymer reinforcing agent, 40-50% of a modified starch copolymer and 20-30% of a cross-linked copolymer. The acid solubility of the acid fracturing temporary plugging agent reaches 100%, the breakthrough pressure gradient reaches 30.4MPa.m<-1>, the temporary plugging rate exceeds 99.5%, and the acid fracturing temporary plugging agent can effectively plug stratum cracks, and meets onsite construction requirements of repetition of an acid fracturing technology. The temporary plugging agent realizes plugging of cracks with different widths through adjusting the particle size, has wide applicability, and is harmless to environment or human bodies; and after the temporary plugging agent is injected, the temporary plugging agent is completely degradable, is easy to flow back and does not pollute stratums.
Description
Technical field
The present invention relates to a kind of acid fracturing diverting agent and preparation method thereof, belong to oilfield chemical technology field, outstandingIt is to be applied to high sulfur Gas Fields deep layer long well section large span Reservoir Acidization fracturing work.
Background technology
The well yield meeting after first fracturing reform of low-permeability oil gas field is successively decreased gradually, must rely on and repeatPressure break or repetition ACID FRACTURING TECHNOLOGY are excavated stratum potentiality, improve well yield. For in middle and high Water-cut PeriodMining phase or through repeatedly with layer refracturing Oil/gas Well, the oil gas in primary fracture control area isApproach whole extraction, therefore must enforcement manually turn to pressure break to press off new crack, thus gull controlRegion, improves oil and gas production and ultimate recovery. Must solve for this reason and repeat, in acid fracturing process, repeatedly to makeThereby turn to the technical barrier that presses off new crack with diverting agent shutoff primary fracture and high permeability formation fluid.
Application number is 201110078492.2 to disclose a kind of high sour gas well gas testing operation operation diverting agent,Be specifically related to ensure job execution safety and reservoir protection in a kind of high sour gas well gas testing operation operation processDiverting agent, mixed by swellability material, bridging materials, packing material, suspending agent, by thisDiverting agent blocks up temporarily to the nearly well band of perforation borehole, can effectively avoid high sulfur-bearing gas reservoir gas testing operation operationDuring this time, cause the generation of the complex situations such as leakage or overflow owing to playing lower tubular column, adapting to formation temperature can reach130 DEG C, acid-soluble rate is more than 90%, and stifled intensity is greater than 10MPa temporarily, and this diverting agent weak point is temporarilyStifled intensity is lower, and plugging effect is not good, is difficult for degraded automatically.
ZL201010130407.8 discloses a kind of for high temperature oil gas reservoir diverting agent, by acrylamide, N,N-methylene-bisacrylamide, polymerization inhibitor, thickening agent, initator, gel breaker and water composition, diverting agentUnder middle high-temperature stratum condition, form high strength frozen glue, broken glue at the appointed time, high temperature oil in adapting toThe segmentation of the Chang Bowl section of gas reservoir, repeat, turn to transformation. But the composite component of this diverting agent is more, is cross-linked to formFrozen glue is not easy to thoroughly break glue, larger to formation damage, and site construction technology is more complicated, and being unfavorable for shouldWith.
ZL201310393381.X discloses a kind of multicomponent acid fracturing diverting agent and preparation method thereof, by30～43% grafting starch copolymers, 25～35% acrylic acid-acrylamide cross-linked copolymers, 5～16% is fibrousPolyester copolymer reinforcing agent, 6～25% auxiliary agent composition, has high acid-soluble by the comprehensive function of these componentsRate, height block up rate and high temperature tolerance temporarily, fully meet efficiency and the performance requirement of hyposmosis oil well later development,But this diverting agent exists component more, preparation process complexity, is unfavorable for the defects such as large-scale industrial production.
Summary of the invention
The object of the invention is to overcome that diverting agent that prior art exists is difficult for from degraded, stifled intensity is not temporarilyThe defects such as height and technology of preparing complexity, provide a kind of acid fracturing diverting agent.
Be to provide the preparation method of above-mentioned acid fracturing diverting agent simultaneously.
The present invention is realized by the following technical programs:
A kind of acid fracturing diverting agent, contains just like the polyester copolymer reinforcing agent shown in general structure (1), as knotModified starch copolymer shown in structure general formula (2) and the cross-linked copolymer as shown in general structure (3):
Wherein x=y=z, polyester copolymer reinforcing agent molecular weight is 400～6,000,000;
Wherein modified starch molecular weight of copolymer is 300～5,000,000;
Wherein cross-linked copolymer molecular weight is 130～1,700,000.
A preparation method for acid fracturing diverting agent, the polyester copolymer that is 25～35% by mass fraction strengthensAgent, 40～50% modified starch copolymer and 20～30% cross-linked copolymer mix, and specifically compriseFollowing steps:
(1), by the granulation of modified starch copolymer, form solid granulates shape thing for subsequent use;
(2) in reactor, 25～35% polyester copolymer reinforcing agents are joined to 20～30% cross-linked copolymersIn be uniformly mixed, then 40～50% modified starch copolymers that make in step (1) are added to friendshipAlly the communists in polymers and be uniformly mixed and get final product.
Described polyester copolymer reinforcing agent is prepared by following chemical reaction:
Wherein m is that 80%, n is 20%, x=y=z=m/3, and this polymer molecular weight is 400～6,000,000.
Described modified starch copolymer is prepared by following chemical reaction:
Wherein m is that 50%, x is that 20%, y is 30%, and this polymer molecular weight is 300～5,000,000.
Beneficial effect of the present invention is: the acid-soluble rate of acid fracturing diverting agent reaches 100%, and breakthrough pressure gradient reaches30.4MPa·m-1, stifled rate exceedes 99.5% temporarily, and effectively shutoff formation fracture meets and repeats acid fracturing skillThe site operation requirement of art. By regulating particle diameter to realize the shutoff in different in width crack, have widelyApplicability, diverting agent can not work the mischief to environment or human body, and can be degradable behind injection stratum, easilyIn the row of returning with do not pollute stratum.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention will be further described.
Preparation example 1: polyester copolymer reinforcing agent preparation
The beta-schardinger dextrin-that accurately takes dry 20g adds in reactor, adds 100g dimethyl sulfoxide (DMSO),Stirring and dissolving is complete, then adds 5g lactide, after it dissolves, adds 0.1g catalyst of triethylamine,Under nitrogen protection, be warming up to 85 DEG C, reaction 8h, obtains light yellow liquid, cooling, pours in frozen water and must sinkForm sediment, filter, ethyl acetate washing, filtration drying obtains white polyester copolymer, and its course of reaction is:
Wherein m is that 80%, n is 20%; The molecular weight of this polymer is 400～6,000,000.
Preparation example 2: modified starch copolymer preparation
20g starch water is in harmonious proportion evenly, at 70 DEG C, stirs gelatinization 1h, be cooled to room temperature, by this pasteChange starch and add in reactor, add successively 50g acrylamide, 30g methyl acrylate, be stirred to completelyDissolve, reacting liquid pH value is adjusted to 11 with sodium hydroxide solution, in reactor, pass into 30 minutes nitrogenGas to oxygen eliminates, and adds 0.2g initator azo two isobutyl imidazoline salt hydrochlorates, continues to stir 10min,Be warming up to 60 DEG C, sealed reaction 2h obtains the modified starch copolymer copolymer of white viscous gel shape, itsCourse of reaction is:
Wherein m is that 50%, x is that 20%, y is 30%; This polymer molecular weight is 300～5,000,000.
Embodiment 1: the preparation of diverting agent
Based on the gross weight of mixture, in reactor by the polyester copolymer reinforcing agent of 35g, 40g modificationStarch copolymer, 25g cross-linked copolymer mix with physics mode, obtain acid fracturing diverting agent, and acid fracturing is temporaryBlocking agent contains the polyester copolymer reinforcing agent shown in general structure (1), changing shown in general structure (2)Property starch copolymer, the cross-linked copolymer shown in general structure (3):
Wherein x=y=z, polyester copolymer reinforcing agent molecular weight is 400～6,000,000;
Wherein modified starch molecular weight of copolymer is 300～5,000,000;
Wherein cross-linked copolymer molecular weight is 130～1,700,000.
The preparation method of embodiment 2-7 is identical with embodiment 1 method, concrete formula in table 1:
Table 1 embodiment 2-7 diverting agent formula
Acid fracturing diverting agent prepared in embodiment 1 is carried out to acid-soluble rate evaluation. Acid-soluble rate evaluation method is:Get 10cm3Diverting agent sample and be placed in the hydrochloric acid solution of 15Wt%, the volume of Timing measurement hydrochloric acid solutionSituation of change.
The acid-soluble rate measurement result of acid fracturing diverting agent of the present invention is as shown in table 2:
The acid-soluble rate of table 2 acid fracturing diverting agent
Acid fracturing diverting agent prepared in embodiment 1 is carried out to breakthrough pressure gradient and temporarily stifled rate evaluation.
Choose 6 groups of rock cores, in the indoor acid fracturing diverting agent rock core flowing experiment of injecting. Evaluation method asUnder: the rock core vacuumizing that is 8cm by length, use simulated formation water saturation; Forward is measured rock core water and is oozedRate K thoroughly1; Along central axis, rock core is rived, manufacture of intraocular crack, then at crack middle berth one deck quartzSand, simulation fracturing fracture is also measured fracture permeabgility K2; Diverting agent sample forward is driven in rock core,At 120 DEG C, place 12h, rock core breakthrough pressure gradient and water phase permeability K are measured in forward displacement3。
Temporarily stifled rate Z calculates according to following formula [1]:
Z＝(K2-K3)/K2×100％[1]
The measurement result of the breakthrough pressure gradient of acid fracturing diverting agent of the present invention and temporarily stifled rate is as shown in table 3:
The breakthrough pressure gradient of table 3 acid fracturing diverting agent and temporarily stifled rate
Can be found out by above measurement data, the acid-soluble rate of acid fracturing diverting agent of the present invention reaches 100%, breaks throughBarometric gradient reaches 30.4MPam-1, stifled rate exceedes 99.5% temporarily, and effectively shutoff formation fracture is fullThe site operation requirement of the multiple ACID FRACTURING TECHNOLOGY of lumping weight.
Claims (4)
1. an acid fracturing diverting agent, is characterized in that: containing being total to just like the polyester shown in general structure (1)Polymers reinforcing agent, modified starch copolymer as shown in general structure (2) and as general structure (3) instituteThe cross-linked copolymer showing:
Wherein x=y=z, polyester copolymer reinforcing agent molecular weight is 400～6,000,000;
Wherein modified starch molecular weight of copolymer is 300～5,000,000;
Wherein cross-linked copolymer molecular weight is 130～1,700,000.
2. a preparation method for acid fracturing diverting agent as claimed in claim 1, is characterized in that: divided by qualityNumber is 25～35% polyester copolymer reinforcing agent, 40～50% modified starch copolymer and 20～30% friendshipThe polymers of allying the communists mixes, and specifically comprises the following steps:
(1), by the granulation of modified starch copolymer, form solid granulates shape thing for subsequent use;
(2) in reactor, 25～35% polyester copolymer reinforcing agents are joined to 20～30% cross-linked copolymersIn be uniformly mixed, then 40～50% modified starch copolymers that make in step (1) are added to friendshipAlly the communists in polymers and be uniformly mixed and get final product.
3. the preparation method of a kind of acid fracturing diverting agent according to claim 2, is characterized in that: described inPolyester copolymer reinforcing agent prepare by following chemical reaction:
Wherein m is that 80%, n is 20%, x=y=z=m/3, and this polymer molecular weight is 400～6,000,000.
4. the preparation method of a kind of acid fracturing diverting agent according to claim 2, is characterized in that: described inModified starch copolymer prepare by following chemical reaction:
Wherein m is that 50%, x is that 20%, y is 30%, and this polymer molecular weight is 300～5,000,000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510696920.6A CN105602543B (en) | 2015-10-22 | 2015-10-22 | Acid fracturing temporary plugging agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510696920.6A CN105602543B (en) | 2015-10-22 | 2015-10-22 | Acid fracturing temporary plugging agent and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105602543A true CN105602543A (en) | 2016-05-25 |
| CN105602543B CN105602543B (en) | 2020-11-06 |
Family
ID=55982911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510696920.6A Active CN105602543B (en) | 2015-10-22 | 2015-10-22 | Acid fracturing temporary plugging agent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105602543B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106833596A (en) * | 2016-12-21 | 2017-06-13 | 中国石油天然气股份有限公司 | It is a kind of can self-generating acid fracturing fluid and its preparation method and application |
| CN107245330A (en) * | 2017-07-05 | 2017-10-13 | 北京斯迪莱铂油气技术有限公司 | Complex Temporary Blocking agent and temporary blocking method for horizontal well refracturing |
| CN108059952A (en) * | 2018-01-03 | 2018-05-22 | 中国石油天然气股份有限公司 | A kind of degradable shielding protection agent and its preparation method and application |
| CN112431570A (en) * | 2020-11-06 | 2021-03-02 | 中国石油天然气股份有限公司 | Test method of temporary plugging agent for temporary plugging of acid fracturing |
| CN113956859A (en) * | 2021-10-25 | 2022-01-21 | 山东恒立重装新技术有限公司 | Temporary plugging ball and manufacturing method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040214724A1 (en) * | 2001-06-11 | 2004-10-28 | Todd Bradley L. | Compositions and methods for reducing the viscosity of a fluid |
| CN101091796A (en) * | 2007-05-11 | 2007-12-26 | 宁波工程学院 | Method for synthesizing lactide copolymer grafted by beta cyclodextrin |
| CN102229692A (en) * | 2011-05-16 | 2011-11-02 | 西南石油大学 | Temperature and salt-resistant AM/ACD/AE copolymer and its preparation method |
| US20120111564A1 (en) * | 2008-01-16 | 2012-05-10 | Halliburton Energy Services, Inc. | Methods and Compositions for Altering the Viscosity of Treatment Fluids Used in Subterranean Operations |
| US20120181035A1 (en) * | 2005-02-02 | 2012-07-19 | Mang Michael N | Methods of Preparing Degradable Materials |
| CN103409130A (en) * | 2013-09-02 | 2013-11-27 | 重庆科技学院 | Multi-component acid pressure temporary plugging additive and preparation method thereof |
-
2015
- 2015-10-22 CN CN201510696920.6A patent/CN105602543B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040214724A1 (en) * | 2001-06-11 | 2004-10-28 | Todd Bradley L. | Compositions and methods for reducing the viscosity of a fluid |
| US20120181035A1 (en) * | 2005-02-02 | 2012-07-19 | Mang Michael N | Methods of Preparing Degradable Materials |
| CN101091796A (en) * | 2007-05-11 | 2007-12-26 | 宁波工程学院 | Method for synthesizing lactide copolymer grafted by beta cyclodextrin |
| US20120111564A1 (en) * | 2008-01-16 | 2012-05-10 | Halliburton Energy Services, Inc. | Methods and Compositions for Altering the Viscosity of Treatment Fluids Used in Subterranean Operations |
| CN102229692A (en) * | 2011-05-16 | 2011-11-02 | 西南石油大学 | Temperature and salt-resistant AM/ACD/AE copolymer and its preparation method |
| CN103409130A (en) * | 2013-09-02 | 2013-11-27 | 重庆科技学院 | Multi-component acid pressure temporary plugging additive and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 司娅萍: "环糊精对聚乳酸的改性研究", 《中国优秀硕士论文全文数据库 工程科技I辑》 * |
| 潘 彤: "环糊精_聚_DL_丙交酯_接枝共聚物的合成与表征", 《高分子学报》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106833596A (en) * | 2016-12-21 | 2017-06-13 | 中国石油天然气股份有限公司 | It is a kind of can self-generating acid fracturing fluid and its preparation method and application |
| CN106833596B (en) * | 2016-12-21 | 2020-12-01 | 中国石油天然气股份有限公司 | Fracturing fluid capable of generating acid by itself and preparation method and application thereof |
| CN107245330A (en) * | 2017-07-05 | 2017-10-13 | 北京斯迪莱铂油气技术有限公司 | Complex Temporary Blocking agent and temporary blocking method for horizontal well refracturing |
| CN107245330B (en) * | 2017-07-05 | 2021-01-22 | 北京斯迪莱铂油气技术有限公司 | Composite temporary plugging agent and temporary plugging method for horizontal well repeated fracturing |
| CN108059952A (en) * | 2018-01-03 | 2018-05-22 | 中国石油天然气股份有限公司 | A kind of degradable shielding protection agent and its preparation method and application |
| CN108059952B (en) * | 2018-01-03 | 2020-05-08 | 中国石油天然气股份有限公司 | Degradable shielding protective agent and preparation method and application thereof |
| CN112431570A (en) * | 2020-11-06 | 2021-03-02 | 中国石油天然气股份有限公司 | Test method of temporary plugging agent for temporary plugging of acid fracturing |
| CN113956859A (en) * | 2021-10-25 | 2022-01-21 | 山东恒立重装新技术有限公司 | Temporary plugging ball and manufacturing method thereof |
| CN113956859B (en) * | 2021-10-25 | 2023-01-17 | 山东恒立重装新技术有限公司 | Temporary plugging ball and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105602543B (en) | 2020-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105602543A (en) | Acid fracturing temporary plugging agent and preparation method thereof | |
| CN103409130B (en) | Polycomponent acid fracturing temporary plugging agent and preparation method thereof | |
| CN111303849B (en) | Temporary plugging agent, preparation method thereof and high-temperature reservoir temporary plugging diversion fracturing method | |
| CN106050213B (en) | A kind of sandstone reservoir low damage distributary acid method | |
| CN106634878B (en) | Drilling fluid additive composition and its application and the water-base drilling fluid suitable for high pressure-bearing plugging while drilling and its application | |
| CN101353569B (en) | Controllable cross linked gel water blockage plugging material | |
| CN103409121B (en) | A kind of water-soluble pressure break turns to temporary plugging agent and preparation method thereof | |
| CN104087275B (en) | A kind of high-temperature-resistant high-salt tiny gels granular profile control agent and its preparation method and application | |
| CN105462568A (en) | Resin type nanoparticle latex blocking agent for drilling fluids and preparation method of blocking agent | |
| CN105368423B (en) | One kind is recovered the oil and uses Chrome-free compound resin gel-like profile control agent and preparation method and purposes | |
| CN106883357A (en) | A kind of pre-crosslinked gel delays swollen microballoon profile control agent and its production and use | |
| CN104099074B (en) | Volume fracturing reconstruction crack plugging agent and water plugging construction method | |
| CN104861953A (en) | Oil field fracture temporary plugging agent and preparation method thereof | |
| CN103965847A (en) | Solidifiable anti-leakage sealing and plugging agent | |
| CN110129013A (en) | Organic-inorganic composite GEL USED FOR PLUGGING WELL LOST CIRCULATION and the preparation method and application thereof | |
| CN102618230A (en) | Controllable cross-linked gel water plugging and leak plugging material for oil and gas field | |
| CN105778877A (en) | Inter-slit temporary plugging agent and preparation method thereof | |
| RU2553807C1 (en) | Gas-blocking plugging material for cementing horizontal wells with small annular gaps | |
| CN106317315A (en) | Plugging agent for oil reservoir fracture plugging | |
| CN104559964A (en) | Shearing-force increase and filtrate loss reduction agent for drilling fluid and preparation method thereof | |
| CN104357033A (en) | Plugging agent synergist, gel containing same as well as preparation method and application of gel | |
| CN104710568A (en) | Preparation method of retarding swelling anti-salt viscoelastic particle profile control agent | |
| CN102585787B (en) | Efficient urea-formaldehyde resin plugging agent and application thereof | |
| CN105062446A (en) | Granular profile control water-plugging agent | |
| CN105238372A (en) | High-molecular gel plugging agent and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | 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 |