CN102604609B - Different-part cross-linking water shutoff profile control gel and preparation method thereof - Google Patents
Different-part cross-linking water shutoff profile control gel and preparation method thereof Download PDFInfo
- Publication number
- CN102604609B CN102604609B CN201210026679.2A CN201210026679A CN102604609B CN 102604609 B CN102604609 B CN 102604609B CN 201210026679 A CN201210026679 A CN 201210026679A CN 102604609 B CN102604609 B CN 102604609B
- Authority
- CN
- China
- Prior art keywords
- water
- different
- mass
- mass parts
- stir
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 238000004132 cross linking Methods 0.000 title claims abstract description 9
- 238000002360 preparation method Methods 0.000 title claims abstract description 5
- 238000001879 gelation Methods 0.000 title description 2
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 9
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 9
- ZOIORXHNWRGPMV-UHFFFAOYSA-N acetic acid;zinc Chemical compound [Zn].CC(O)=O.CC(O)=O ZOIORXHNWRGPMV-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000004246 zinc acetate Substances 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract 7
- 229910052782 aluminium Inorganic materials 0.000 claims abstract 7
- 239000003795 chemical substances by application Substances 0.000 claims description 20
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000013019 agitation Methods 0.000 claims description 5
- WWMIMRADNBGDHP-UHFFFAOYSA-N 2-hydroxyhexanedial Chemical compound O=CC(O)CCCC=O WWMIMRADNBGDHP-UHFFFAOYSA-N 0.000 claims description 3
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical class Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 3
- 125000003368 amide group Chemical group 0.000 claims description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 3
- 150000007524 organic acids Chemical class 0.000 claims 4
- 238000000034 method Methods 0.000 abstract description 6
- 239000000243 solution Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 238000000605 extraction Methods 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract 3
- 239000002253 acid Substances 0.000 abstract 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 abstract 1
- JGDITNMASUZKPW-UHFFFAOYSA-K aluminium trichloride hexahydrate Chemical compound O.O.O.O.O.O.Cl[Al](Cl)Cl JGDITNMASUZKPW-UHFFFAOYSA-K 0.000 abstract 1
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 238000002156 mixing Methods 0.000 abstract 1
- 239000012266 salt solution Substances 0.000 abstract 1
- 239000000499 gel Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 238000001802 infusion Methods 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 206010017076 Fracture Diseases 0.000 description 2
- 239000002981 blocking agent Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Medicinal Preparation (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The different-part cross-linking water-plugging profile control gel is applied to the technical field of underground water plugging of oil extraction wells in oil fields. The preparation method comprises the following steps: A. preparing an organic aluminum salt solution: uniformly mixing aluminum trichloride hexahydrate, citric acid and water according to the mass ratio of 0.6-0.8: 1: 50, and stirring for 30 minutes at normal temperature to obtain an organic aluminum acid solution. B. Preparing a composite cross-linking agent: and B, adding zinc acetate and alpha-hydroxy adipic dialdehyde into the organic aluminum solution prepared in the step A, wherein the mass part ratio of the organic aluminum solution to the zinc acetate to the alpha-hydroxy adipic dialdehyde is 50: 1.6-2.0: 3.0-5.0. Stirring at normal temperature to obtain the composite cross-linking agent. C. Preparing a different-part cross-linking water shutoff profile control gel: slowly adding 0.2-0.8 part by mass of cyclic polyacrylamide into 100 parts by mass of water, and stirring; adding 0.3-1.0 part by mass of a composite cross-linking agent; the crosslinking reaction is completed. The effect is as follows: can control different gel strengths, realize different delay crosslinking times and meet the requirements of water shutoff profile control process.
Description
Technical field
The present invention relates to water-plugging technique field, oil extraction in oil field down-hole, particularly the crosslinked water plugging and profile controlling gelifying agent of a kind of different portion of applicable Oil in Super-low Permeability oil reservoir compact reservoir.
Background technology
At present, long celebrating part ultra-low penetration reservoir fractures is grown, in waterflooding process, because reservoir heterogeneity is serious, injected water, along high permeability zone channelling, causes injected water spread effect poor, in oil well produced liquid, water content rises fast, water plugging and profile controlling, as improving waterflood sweep efficiency, improves the realistic approach of waterflooding development effect, and difficulty is large.
Used water plugging and profile controlling method, is mainly by inorganic organic granular and two kinds of water plugging and profile controlling systems of cross linked gel, by the mode of different slug combinations, can regulate and control to be limited in scope, and it is efficient low implementing general performance, and validity period is short.The cross linked gel that at present both at home and abroad low permeability reservoir is carried out to deep profile controlling mainly uses polymer weak gel and colloidal dispersed gel.This gel-strength is low, is mainly applicable to the oil reservoir that nonuniformity is not too serious, injects and carries out transfer drive with heavy dose.And nonuniformity is strong, fracture development, the serious ultra-low penetration oil reservoir of water breakthrough, require the used blocking agent of withering to there is some strength, to inject blocking agent amount large for deep profile controlling simultaneously, and injection length is long, and plugging agent should have suitable gelation time and higher plugging strength.
Summary of the invention
The object of the invention is: provide a kind of different portion to be cross-linked water plugging and profile controlling gelifying agent, by controlling linking agent composition and additional proportion, realize different gel-strengths, realize the different crosslinking times that postpone.Be applicable to Oil in Super-low Permeability oil reservoir compact reservoir water plugging and profile controlling, meet different water plugging and profile controlling needs.
The technical solution used in the present invention is: different portion is cross-linked water plugging and profile controlling gelifying agent, and each component comprises:
1, host: ring-type polyacrylamide, ring-type polyacrylamide is the ring-type anion-polyacrylamide that contains amide group and two different crosslinkable functionalities of carboxyl, Beijing Xitao Development Tech Co., Ltd. produces to be had product and has sale.
2, six water aluminum chloride (AlCl
36H
2o), technical grade, upper hamming too development of chemical industry company limited is produced.
3, citric acid, technical grade, Wujiang Run Tai Fine Chemical Co., Ltd produces.
4, zinc acetate, technical grade, Shandong Gelande Bio-Technology Co., Ltd. produces.
5, pH value conditioning agent: the aqueous sodium hydroxide solution that concentration is 2%, technical grade, Tianjin Shen Tai chemical reagent company limited produces.
6, Alpha-hydroxy hexanedial: Laohekou Jing Hong chemical industry limited liability company produces.
Molecular formula: C
6h
10o
3molecular structural formula:
7, water.
The preparation method of the crosslinked water plugging and profile controlling gelifying agent of different portion:
Steps A, prepare organic acid aluminum solutions: by six water aluminum chlorides, citric acid and water by mass parts than 0.6～0.8: mix at 1: 50, stir at normal temperatures 30 minutes, obtain organic acid aluminum solutions.
Step B, prepare multiple crosslinking agent: in the organic acid aluminum solutions of preparing in steps A, add zinc acetate and Alpha-hydroxy hexanedial, the mass parts ratio of organic acid aluminum solutions, zinc acetate and Alpha-hydroxy hexanedial is 50: 1.6～2.0: 3.0～5.0.Stir at normal temperatures 10 minutes, obtain multiple crosslinking agent.
Step C, prepare the crosslinked water plugging and profile controlling gelifying agent of different portion: under agitator agitation condition, to the ring-type polyacrylamide that slowly adds 0.2～0.8 mass parts in the water of 100 mass parts, stir 2～6 hours; Then, the aqueous sodium hydroxide solution that dropping concentration is 2%, is transferred to pH between 5～8, stirs; Finally, add the multiple crosslinking agent of 0.3～1.0 mass parts; Stir; Under 50～60 DEG C of conditions, complete crosslinking reaction, be down to normal temperature, obtain the crosslinked water plugging and profile controlling gelifying agent of different portion.
The using method of the crosslinked water plugging and profile controlling gelifying agent of different portion:
Material is prepared by the amount of working design requirement in working-yard, connects after liquid distributing vehicle pipeline, utilizes dosing funnel slowly to add the crosslinked water plugging and profile controlling gelifying agent of different portion in the clear water of Agitation Tank, and large discharge capacity circulation 30 minutes, directly injects stratum.The crosslinked water plugging and profile controlling gelifying agent of different portion slow salt resis in stratum.
Beneficial effect of the present invention: the different portion of the present invention is cross-linked water plugging and profile controlling gelifying agent, host is the ring-type anion-polyacrylamide that contains two different crosslinkable functionalities, by supporting multiple crosslinking agent that can be crosslinked with Liang Ge functional group, the different portion that realizes two position amide group and carboxyl is crosslinked.Under 50～60 DEG C of conditions, carry out crosslinking reaction, control proportioning and linking agent dosage between each composition in linking agent.Can control different gel-strengths, realize 1 day to 20 days different delay cross linking time, reach water plugging and profile controlling technique needs.
Embodiment
Prepare different portion taking three times and be cross-linked water plugging and profile controlling gelifying agent as example, the present invention is described in further detail.
Embodiment 1:
Steps A, prepare organic acid aluminum solutions: in 2000kg water, add 24kg six water aluminum chloride (AlCl
36H
2and 40kg citric acid O), under normal temperature, stir 30 minutes, obtain 2064kg organic acid aluminum solutions.
Step B, prepare multiple crosslinking agent: in the 2064kg organic acid aluminum solutions of preparing, add 70kg zinc acetate and 140kg Alpha-hydroxy hexanedial in steps A, stir at normal temperatures 10 minutes, obtain 2274kg multiple crosslinking agent.
Before step C, on-the-spot use, be prepared.
On-the-spot ten Agitation Tanks, the standby clear water 3 × 10 in each Agitation Tank prepared
4kg (30m
3), utilizing 700 type cementing trucks to connect dosing funnel is 2% aqueous sodium hydroxide solution to adding 60kg ring-type polyacrylamide and 100kg concentration in each Agitation Tank, circulates 30 minutes, and pH is transferred to 6, leaves standstill 4 hours.Then, in the first tank gelating soln, add 90kg multiple crosslinking agent, circulate after 30 minutes, utilize cementing truck to pump into example well 1 with the discharge capacity of 50L/min.The first tank gelating soln residue five/for the moment, add 90kg multiple crosslinking agent in the second tank gelating soln, and circulate 30 minutes, the like.
Example well 1 accumulative total infusion gel 2.8 × 10
5kg (280m
3).
The effect of embodiment 1: example well 1 completes after the crosslinked water plugging and profile controlling gelifying agent of the different portion of infusion, continues with 50L/min infusion clear water 100m
3, closing well after completing.After 15 days, start water filling, water injection pressure, by 13.5MPa before, rises to 15.2MPa, and daily water-injection rate is by 21m
3be down to 18m
3and keep stable, and corresponding 6 mouthfuls of oil wells are average moisture is down to 50.6% by 83.4%, and water filling is after 20 days, and 6 mouthfuls of oil well ultimate productions increase to 14.3t/d by 10.7t/d.
Embodiment 2:
Steps A, prepare organic acid aluminum solutions: in 2000kg water, add 32kg six water aluminum chloride (AlCl
36H
2and 40kg citric acid O), under normal temperature, stir 30 minutes, obtain 2072kg organic acid aluminum solutions.
Step B, prepare multiple crosslinking agent: in the 2072kg organic acid aluminum solutions of preparing, add 80kg zinc acetate and 200kg Alpha-hydroxy hexanedial in steps A, stir at normal temperatures 10 minutes, obtain 2352kg multiple crosslinking agent.
Step C, on-the-spot use procedure: the on-the-spot 6 tool Agitation Tanks of preparing, often possess clear water 3 × 10
4kg (30m
3), utilize 700 type cementing trucks to connect dosing funnel and add 120kg ring-type polyacrylamide and 100 liter of 5% aqueous sodium hydroxide solution in the large tank of every tool, circulate 30 minutes, prepare gel base fluid 1.8 × 10
5kg (180m
3), leave standstill after 4 hours, utilize truck-mounted blender to connect the discharge capacity infusion of 700 type cementing trucks with 200L/min, in this process, truck-mounted blender liquid adds pump and adds above-mentioned multiple crosslinking agent with 1.6L/min.Example well 2 accumulative total infusion gels 1.65 × 10
5kg (165m
3).
The effect of embodiment 2: example well 2 completes after the crosslinked water plugging and profile controlling gelifying agent of the different portion of infusion, crosses replacement clear water 20m
3, closing well after completing.After 3 days, start to recover the oil, be moisturely down to 46.9% by 92.1% before measure, day production fluid by measure before 15.2m
3/ d is down to 5.6m
3/ d, validity period reaches 415 days.
Embodiment 3:
Steps A, prepare organic acid aluminum solutions: in 2000kg water, add 28kg six water aluminum chloride (AlCl
36H
2and 40kg citric acid O), under normal temperature, stir 30 minutes, obtain 2068kg organic acid aluminum solutions.
Step B, prepare multiple crosslinking agent: in the organic acid aluminum solutions of preparing, add 70kg zinc acetate and 150kg Alpha-hydroxy hexanedial in steps A, stir at normal temperatures 10 minutes, obtain 2288kg multiple crosslinking agent.
Step C, on-the-spot use procedure: the on-the-spot 5 tool Agitation Tanks of preparing, often possess clear water 3 × 10
4kg (30m
3), utilize 700 type cementing trucks to connect dosing funnel and add 105kg ring-type polyacrylamide and 100kg 4.5% aqueous sodium hydroxide solution in the large tank of every tool, circulate 30 minutes, prepare gel base fluid 1.5 × 10
5kg (150m
3), leave standstill after 4 hours, utilize truck-mounted blender to connect the discharge capacity infusion of 700 type cementing trucks with 160L/min, in this process, truck-mounted blender liquid adds pump and adds above-mentioned multiple crosslinking agent with 1.2L/min.Example well 2 accumulative total infusion gels 1.37 × 10
5kg (137m
3).
The effect of embodiment 3: example well 3 completes after the crosslinked water plugging and profile controlling gelifying agent of the different portion of infusion, crosses replacement clear water 12m
3, closing well after completing.After 5 days, start to recover the oil, be moisturely down to 31.6% by 87.3% before measure, day production fluid by measure before 8.3m
3/ d is down to 3.5m
3/ d, validity period reaches 320 days.
Claims (1)
1. the preparation method of the crosslinked water plugging and profile controlling gelifying agent of different portion:
Steps A, prepare organic acid aluminum solutions: six water aluminum chlorides, citric acid and water are mixed than 0.6～0.8:1:50 by mass parts, stir at normal temperatures 30 minutes, obtain organic acid aluminum solutions;
Step B, prepare multiple crosslinking agent: in the organic acid aluminum solutions of preparing, add zinc acetate and Alpha-hydroxy hexanedial in steps A, the mass parts of organic acid aluminum solutions, zinc acetate and Alpha-hydroxy hexanedial is than being 50:1.6～2.0:3.0～5.0, stir at normal temperatures 10 minutes, obtain multiple crosslinking agent;
Step C, prepare the crosslinked water plugging and profile controlling gelifying agent of different portion: under agitator agitation condition, to the ring-type polyacrylamide that slowly adds 0.2～0.8 mass parts in the water of 100 mass parts, stir 2～6 hours; Then, the aqueous sodium hydroxide solution that dropping concentration is 2%, is transferred to pH between 5～8, stirs; Finally, add the multiple crosslinking agent of 0.3～1.0 mass parts; Stir; Under 50～60 DEG C of conditions, complete crosslinking reaction, be down to normal temperature, obtain the crosslinked water plugging and profile controlling gelifying agent of different portion, described ring-type polyacrylamide is the ring-type anion-polyacrylamide that contains amide group and two different crosslinkable functionalities of carboxyl.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210026679.2A CN102604609B (en) | 2012-02-07 | 2012-02-07 | Different-part cross-linking water shutoff profile control gel and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210026679.2A CN102604609B (en) | 2012-02-07 | 2012-02-07 | Different-part cross-linking water shutoff profile control gel and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102604609A CN102604609A (en) | 2012-07-25 |
| CN102604609B true CN102604609B (en) | 2014-11-19 |
Family
ID=46522391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210026679.2A Active CN102604609B (en) | 2012-02-07 | 2012-02-07 | Different-part cross-linking water shutoff profile control gel and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102604609B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104140801B (en) * | 2013-10-29 | 2018-09-25 | 中国石油化工股份有限公司 | A kind of alumina gel profile control agent and preparation method thereof |
| CN104559975B (en) * | 2014-12-24 | 2017-05-10 | 中国石油天然气股份有限公司 | Water plugging agent and preparation method and application thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048738A (en) * | 1989-07-14 | 1991-01-23 | 马拉索恩石油公司 | Prevent the method for the lost circulation of oil drilling |
| US5246073A (en) * | 1992-08-31 | 1993-09-21 | Union Oil Company Of California | High temperature stable gels |
| CN1270967A (en) * | 2000-02-18 | 2000-10-25 | 石油大学(北京) | Preparation of deep modifier for cross-linked polymer solution (LPS) |
| WO2005023877A1 (en) * | 2003-09-03 | 2005-03-17 | Hokkaido Technology Licensing Office Co., Ltd. | Water-absorbing resin and method for manufacturing the same |
| CN1810918A (en) * | 2006-01-19 | 2006-08-02 | 大庆石油学院 | Intramolecular Al cross-linked polymer gel and its prepn |
| CN101353569A (en) * | 2008-09-17 | 2009-01-28 | 西南石油大学 | Controllable cross linked gel water blockage plugging material |
| CN101440277A (en) * | 2008-12-31 | 2009-05-27 | 王纯连 | Selective water blockoff agent and preparation thereof |
| CN101649194A (en) * | 2009-09-15 | 2010-02-17 | 克拉玛依市正诚有限公司 | Compound multivalent metallic ion crosslinking agent and production method and use method thereof |
-
2012
- 2012-02-07 CN CN201210026679.2A patent/CN102604609B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048738A (en) * | 1989-07-14 | 1991-01-23 | 马拉索恩石油公司 | Prevent the method for the lost circulation of oil drilling |
| US5246073A (en) * | 1992-08-31 | 1993-09-21 | Union Oil Company Of California | High temperature stable gels |
| CN1270967A (en) * | 2000-02-18 | 2000-10-25 | 石油大学(北京) | Preparation of deep modifier for cross-linked polymer solution (LPS) |
| WO2005023877A1 (en) * | 2003-09-03 | 2005-03-17 | Hokkaido Technology Licensing Office Co., Ltd. | Water-absorbing resin and method for manufacturing the same |
| CN1810918A (en) * | 2006-01-19 | 2006-08-02 | 大庆石油学院 | Intramolecular Al cross-linked polymer gel and its prepn |
| CN101353569A (en) * | 2008-09-17 | 2009-01-28 | 西南石油大学 | Controllable cross linked gel water blockage plugging material |
| CN101440277A (en) * | 2008-12-31 | 2009-05-27 | 王纯连 | Selective water blockoff agent and preparation thereof |
| CN101649194A (en) * | 2009-09-15 | 2010-02-17 | 克拉玛依市正诚有限公司 | Compound multivalent metallic ion crosslinking agent and production method and use method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 刘翔鹗等.油田化学堵水剂的发展和应用.《油田化学》.1985,(第04期), * |
| 油田化学堵水剂的发展和应用;刘翔鹗等;《油田化学》;19851231(第04期);334-342 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102604609A (en) | 2012-07-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104629697B (en) | A kind of heatproof frozen glue | |
| CN105586024A (en) | Profile control and water shutoff agent for high-temperature hypersalinity oil reservoir and profile control and water shutoff method | |
| CN101412905B (en) | Preparation method of composite fracturing fluid for hydraulic fracturing | |
| CN102816558B (en) | Plugging agent for deep profile control and water plugging and preparation method thereof | |
| CN104387530A (en) | Preparation method of high-content calcium bentonite water shutoff agent | |
| CN103265938B (en) | Foam-like fracturing system, preparation method and filling method thereof | |
| CN101314713A (en) | Controllable-viscosity acid liquor system for carbonatite container horizon acid fracturing | |
| CN102120929B (en) | Preparation method of gas-well water controlling agent | |
| CN102516961B (en) | Organic/inorganic crosslinking system plugging agent applicable to high-temperature oil reservoir | |
| CN103184040B (en) | Stratum pre-crosslinked gel water shutoff agent | |
| CN103865503B (en) | High temperature resistant inorganic granulated gel compounds double-liquid seal blocking agent and method for blocking thereof | |
| CN103911134A (en) | Compound profile modifying/water plugging agent | |
| CN103525393B (en) | A kind of Instant gelling agent for acid fluid and preparation method thereof and application | |
| WO1995018909A1 (en) | Hydrocarbon recovery process utilizing a gel prepared from a polymer and a preformed crosslinking agent | |
| CN103409120A (en) | Polymer nano intercalation composite material plugging agent and preparation method and application thereof | |
| CN104194754A (en) | Temperature-resistant salt-resistant HPAM/Cr<3+>/phenolic aldehyde compound crosslinked weak gel profile adjusting and water plugging agent and preparation method thereof | |
| CN106590559B (en) | The nano combined frozen glue of heavy oil thermal recovery fleeing proof | |
| CN105368423A (en) | Chromium-free composite resin gel-type profile control agent for oil exploitation and preparation method and application thereof | |
| CN104560003A (en) | Organic boron zirconium crosslinking agent | |
| CN109868126B (en) | Water plugging agent and preparation method and application thereof | |
| CN102604609B (en) | Different-part cross-linking water shutoff profile control gel and preparation method thereof | |
| CN106590560A (en) | Gel temporary plugging agent | |
| CN111410948A (en) | Temperature response type phase change fracturing fluid and application method thereof | |
| CN103980872B (en) | Environmental-friendly gel plugging agent applicable to low-temperature oil pool and applications of gel plugging agent | |
| CN104232057A (en) | Water-in-oil type cross-linking agent emulsion and preparation method thereof |
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 |