CN102926701A - Continuous mixing type water plugging technique - Google Patents
Continuous mixing type water plugging technique Download PDFInfo
- Publication number
- CN102926701A CN102926701A CN2012104270513A CN201210427051A CN102926701A CN 102926701 A CN102926701 A CN 102926701A CN 2012104270513 A CN2012104270513 A CN 2012104270513A CN 201210427051 A CN201210427051 A CN 201210427051A CN 102926701 A CN102926701 A CN 102926701A
- Authority
- CN
- China
- Prior art keywords
- water
- blocking agent
- main body
- plugging
- well
- 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
Landscapes
- Sealing Material Composition (AREA)
Abstract
The invention discloses a continuous mixing type water plugging technique, which comprises the following steps of: a, taking and mixing 2-10 parts of main-body plugging agent and 100 parts of clear water so as to form a main-body plugging agent liquid, and then injecting the main-body plugging agent liquid into a stratum; b, enabling the main-body plugging agent liquid in a shaft to enter into a reservoir stratum of an oil well by using clear water in an overhead mode; c, closing the well to wait for coagulation, namely, the main-body plugging agent liquid is formed into high-viscosity elastic gel after being reacted for 3-24 hours at a temperature of 30-90 DEG C, and the high-viscosity elastic gel blocks micro fractures and water passageways for matrixes in the reservoir stratum, thereby realizing the effectively blocking on the water-logging oil well; and d, opening the well and carrying out pumping, carrying out pumping on the oil well according to standard oil well pumping procedures and putting the oil well into operation. Compared with the prior art, the technique disclosed by the invention solves the technical problem that in the conventional water plugging technologies, due to the injection of a large mount of plugging agents, phenomena such as poor blocking effect and short period of validity are easy to cause; meanwhile, the technique also solves the technical problem that the existing single injection type water plugging process is long in construction period, so that the manpower and equipment burdens, especially the treatment of residual liquid after the construction is completed, are increased.
Description
Technical field
The present invention relates to technical field of petroleum extraction, relate to specifically a kind of volume increase of oil well water and oil control reforming technology, particularly a kind of continuous mixed matching water-plugging technology method.
Background technology
In the LOW PERMEABILITY OILFIELD DEVELOPMENT process, because the impact in formation fracture (natural microcrack and artificial fracturing crack) is developed and be subjected to long-term Advance Water Injection, the non-homogeneity on stratum is unusually serious, make injected water often along the high flow in fracture that oozes, and involve less permeable layer less than oil-containing, the water filling of this poor efficiency not only affects the crude oil recovery percent of reserves, and owing to the consumption of the energy, the processing of production fluid, the corrosion of pipeline etc. have increased the cost that recovers the oil.Ooze out water layer for shutoff is high, disclose multiple method for blocking in the prior art, wherein closely with the present invention had that CN86108877A " Zirconium gel water sealing agent ", CN1464173A " are applicable to the modified tannin extract gel water-plugging technique of high temperature and high salt oil deposit ", CN1177053A " the water plugging and profile controlling method that a kind of single-fluid process, two-fluid process are combined " and CN101139920A " dibasic composite horizontal well bottom water plugging technique " etc.Non-patent literature has: the development of application (286-289 page or leaf), the Oilfields engineering of benzenediol in the polymeric gel water-plugging technique the 8th phase net horizontal section water blockoff new technology (21-22 page or leaf) in 2003, petroleum science and technology forum the 1st phase China's Water in Water Shutoff in Oil Field profile control technique in 2004 and thinking (41-47 page or leaf) etc. all disclose a kind of water plugging and profile controlling agent prescription or process during oilfield chemistry the 14th volume the 3rd.
But these existing conventional water-plugging technologies all are to adopt single injection technology to inject from oil well the blocking agent slug, then closing well Hou Ning.On the one hand, conventional blocking agent base fluid viscosity is larger, and microcrack and the matrix that should not enter low permeability reservoir cause plugging effect not good enough, and period of validity is short.On the other hand, whole process need prepares blocking agent before construction in advance, will process remaining blocking agent after the construction, long construction period, the burden of increase manpower and equipment.Above-mentioned document is unexposed report about continuous mixed matching water-plugging technology method all.
Summary of the invention
For addressing the above problem, the present invention proposes a kind of continuous mixed matching water-plugging technology method, can realize the efficient plug water construction fast of high-water-cut oil-producing well.This method has solved in the conventional water-plugging technique existing large discharge capacity and has injected blocking agent and easily cause plugging effect not good enough, the technical problem that period of validity is short, also solved simultaneously existing single pouring-in water-plugging technology long construction period, increase manpower and facility load, the technical problem that raffinate was processed after particularly construction finished.
The present invention is by adopting following technical proposals to realize:
A kind of continuous mixed matching water-plugging technology method is characterized in that, comprises the steps:
A, get 100 parts in main body blocking agent 2-10 part and clear water and mix and inject the stratum after forming main body blocking agent solution, wherein 100 parts in clear water does not comprise used clear water in the following b step;
B, cross in the replacement oil-feed well reservoir main body blocking agent solution in the pit shaft is whole with clear water;
C, closing well Hou Ning, main body blocking agent solution react the high viscoelastic gel of formation after 3-24 hour under temperature 30-90 ℃ condition, the water stream channel of microcrack and matrix is realized the effective shutoff to the water logging oil well in the blocking-up reservoir;
D, the suction that drives a well by oil field suction standardization program, are aspirated operation to oil well.
The mixture that described main body blocking agent is comprised of cation-modified polyacrylamide, 2-acrylamide-2-methylpro panesulfonic acid AMPS and lignosulfonates, mixing quality ratio between them is: 1%-30%:0.1%-10%:1%-10%, the viscosity of mixture aqueous solution is less than 5mPa s.
Described cation-modified polyacrylamide is existing product, is documented in " Northeast Petroleum University ", and the author is Cui Liyan, and name is called in the Master's thesis of " the synthetic and flocculating property research of modified cation polyacrylamide ".
In the described a step, be to adopt fracturing unit truck or high pressure pump truck that main body blocking agent solution is injected the stratum.
In the described b step, when main body blocking agent solution and clear water were compressed into oil well microcrack and matrix, infusion pressure was as the criterion to be no more than 80% of formation fracture pressure.
In the described d step, directly go into operation or take behind the checking water plugging effect and go into operation after other measures.
Compared with prior art, advantage of the present invention and beneficial effect show:
1, the present invention is by the improvement to main body blocking agent performance, relying on the main body blocking agent to meet the rapidly-soluble performance realization of water is mixed plug water construction continuously and need not to add new equipment, by a, b, c, four steps of d, join blocking agent before having solved existing single pouring-in water-plugging technology construction, the remaining blocking agent of construction post processing, long construction period, the technical problem of increase manpower and facility load.This technique is specially adapted to remote districts or the offshore oil gas well of hypotonic extra-low permeability Oil/gas Well (conventional blocking agent can not enter microcrack and matrix) or dosing operating expenses costliness, has a good application prospect.
2, the main body blocking agent temperature tolerance of the present invention's employing can reach 90 ℃, and the Water Under phase sealing ratiod at 30-90 ℃ after the reaction of main body blocking agent can reach more than 90%.
3, the mixture that formed by cation-modified polyacrylamide, 2-acrylamide-2-methylpro panesulfonic acid AMPS and lignosulfonates of the main body blocking agent that adopts of the present invention, mixing quality ratio between them is: 1%-30%:0.1%-10%:1%-10%, it is a kind of instant capacity powdery solid, has instant low viscosity characteristics, the aqueous solution shows as low viscosity (viscosity is less than 5mPa s) at normal temperatures, can form viscosity after the reaction greater than the gel of 10000mPa s.Be conducive to like this microcrack and matrix that main body blocking agent solution enters low permeability reservoir, water stream channel is formed more effective shutoff.
The specific embodiment
Embodiment 1
The invention discloses a kind of continuous mixed matching water-plugging technology method, comprise the steps:
A, get 100 parts in main body blocking agent 2-10 part and clear water and mix and inject the stratum after forming main body blocking agent solution, wherein 100 parts in clear water does not comprise used clear water in the following b step;
B, cross in the replacement oil-feed well reservoir main body blocking agent solution in the pit shaft is whole with clear water;
C, closing well Hou Ning, main body blocking agent solution react the high viscoelastic gel of formation after 3-24 hour under temperature 30-90 ℃ condition, the water stream channel of microcrack and matrix is realized the effective shutoff to the water logging oil well in the blocking-up reservoir;
D, the suction that drives a well by oil field suction standardization program, are aspirated operation to oil well.
In the present embodiment, the main body blocking agent that adopts can be any instant capacity blocking agent product commonly used in this area.
Embodiment 2
The invention discloses a kind of continuous mixed matching water-plugging technology method, comprise the steps:
A, get 100 parts in main body blocking agent 2-10 part and clear water and mix and inject the stratum after forming main body blocking agent solution, wherein 100 parts in clear water does not comprise used clear water in the following b step;
B, cross in the replacement oil-feed well reservoir main body blocking agent solution in the pit shaft is whole with clear water;
C, closing well Hou Ning, main body blocking agent solution react the high viscoelastic gel of formation after 3-24 hour under temperature 30-90 ℃ condition, the water stream channel of microcrack and matrix is realized the effective shutoff to the water logging oil well in the blocking-up reservoir;
D, the suction that drives a well, checking are directly gone into operation behind the water plugging effect or are taked other measures volume increase.
The mixture that described main body blocking agent is comprised of cation-modified polyacrylamide, 2-acrylamide-2-methylpro panesulfonic acid AMPS and lignosulfonates, mixing quality ratio between them is: 1%-30%:0.1%-10%:1%-10%, the viscosity of mixture aqueous solution is less than 5mPa s.
Described cation-modified polyacrylamide is existing product, is documented in " Northeast Petroleum University ", and the author is Cui Liyan, and name is called in the Master's thesis of " the synthetic and flocculating property research of modified cation polyacrylamide ".
Embodiment 3
As preferred forms of the present invention, it comprises the steps:
A, get 100 parts in main body blocking agent 2-10 part and clear water and mix and inject the stratum after forming main body blocking agent solution, wherein 100 parts in clear water does not comprise used clear water in the following b step;
B, cross in the replacement oil-feed well reservoir main body blocking agent solution in the pit shaft is whole with clear water;
C, closing well Hou Ning, main body blocking agent solution react the high viscoelastic gel of formation after 3-24 hour under temperature 30-90 ℃ condition, the water stream channel of microcrack and matrix is realized the effective shutoff to the water logging oil well in the blocking-up reservoir;
D, the suction that drives a well, checking are directly gone into operation behind the water plugging effect or are taked other measures volume increase.
The mixture that described main body blocking agent is comprised of cation-modified polyacrylamide, 2-acrylamide-2-methylpro panesulfonic acid AMPS and lignosulfonates, mixing quality ratio between them is: 1%-30%:0.1%-10%:1%-10%, the viscosity of mixture aqueous solution is less than 5mPa s.
Described cation-modified polyacrylamide is existing product, is documented in " Northeast Petroleum University ", and the author is Cui Liyan, and name is called in the Master's thesis of " the synthetic and flocculating property research of modified cation polyacrylamide ".
In the described a step, be to adopt fracturing unit truck or high pressure pump truck that main body blocking agent solution is injected the stratum.
In the described b step, when main body blocking agent solution and clear water were compressed into oil well microcrack and matrix, infusion pressure was as the criterion to be no more than 80% of formation fracture pressure.
Specific implementation process of the present invention:
1, according to wellfracturing operation and refracturing transformation and geologic feature data and consider blocking agent shutoff efficient, calculates required plug agent amount.
2, according to the laboratory experiment result, determine the optium concentration of each component of main body blocking agent.
3, according to the geologic feature of shutoff reservoir, formulate concrete plug water construction scheme, mainly determine determining and to be as the criterion to be no more than 80% of formation fracture pressure of discharge capacity and maximum pressure two parameters, especially pressure.
4, finish plug water construction according to the plug water construction design.At first with active water formation testing suction situation, determine accordingly injection discharge capacity and the ground pump pressure of plug water construction during construction, then according to infusion scheme infusion main body blocking agent, finish the plug water construction to service shaft.
5, according to oil field suction standardization program, oil well is aspirated operation, the checking water plugging effect.
Claims (5)
1. a continuous mixed matching water-plugging technology method is characterized in that, comprises the steps:
A, get 100 parts in main body blocking agent 2-10 part and clear water and mix and inject the stratum after forming main body blocking agent solution;
B, cross in the replacement oil-feed well reservoir main body blocking agent solution in the pit shaft is whole with clear water;
C, closing well Hou Ning, main body blocking agent solution react the high viscoelastic gel of formation after 3-24 hour under temperature 30-90 ℃ condition, the water stream channel of microcrack and matrix is realized the effective shutoff to the water logging oil well in the blocking-up reservoir;
D, the suction that drives a well by oil field suction standardization program, are aspirated operation to oil well.
2. a kind of continuous mixed matching water-plugging technology method according to claim 1, it is characterized in that, the mixture that described main body blocking agent is comprised of cation-modified polyacrylamide, 2-acrylamide-2-methylpro panesulfonic acid AMPS and lignosulfonates, mixing quality ratio between them is: 1%-30%:0.1%-10%:1%-10%, the viscosity of mixture aqueous solution is less than 5mPa s.
3. a kind of continuous mixed matching water-plugging technology method according to claim 1 and 2 is characterized in that, in the described a step, is to adopt fracturing unit truck or high pressure pump truck that main body blocking agent solution is injected the stratum.
4. a kind of continuous mixed matching water-plugging technology method according to claim 3 is characterized in that, in the described b step, when main body blocking agent solution and clear water were compressed into oil well microcrack and matrix, infusion pressure was as the criterion to be no more than 80% of formation fracture pressure.
5. a kind of continuous mixed matching water-plugging technology method according to claim 1 is characterized in that, in the described d step, directly goes into operation behind the checking water plugging effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210427051.3A CN102926701B (en) | 2012-10-31 | 2012-10-31 | A kind of mixed matching water-plugging technology method continuously |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210427051.3A CN102926701B (en) | 2012-10-31 | 2012-10-31 | A kind of mixed matching water-plugging technology method continuously |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102926701A true CN102926701A (en) | 2013-02-13 |
| CN102926701B CN102926701B (en) | 2015-08-19 |
Family
ID=47641613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210427051.3A Active CN102926701B (en) | 2012-10-31 | 2012-10-31 | A kind of mixed matching water-plugging technology method continuously |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102926701B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321606A (en) * | 2013-07-02 | 2013-09-25 | 中国石油集团川庆钻探工程有限公司 | Low-permeability fractured reservoir oil well water-plugging and screening method |
| CN103865504A (en) * | 2014-03-10 | 2014-06-18 | 东北石油大学 | Gel double-solution plugging regulating agent of steam injection well for thermal recovery and plugging regulating method using gel double-solution plugging regulating agent |
| CN103865503A (en) * | 2014-03-10 | 2014-06-18 | 东北石油大学 | Novel high-temperature resistant inorganic particle-gel compound double-liquid blocking agent and blocking method thereof |
| CN103865510A (en) * | 2014-03-10 | 2014-06-18 | 东北石油大学 | Thermal-recovery injection well gel single-liquid modifying and flooding agent and modifying and flooding method thereof |
| CN104121000A (en) * | 2014-07-11 | 2014-10-29 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Low-permeability fractured reservoir cased hole completion horizontal well water plugging method |
| CN105201449A (en) * | 2015-10-14 | 2015-12-30 | 中国石油集团长城钻探工程有限公司 | Water plugging method for thickened oil thermal recovery horizontal well |
| CN113153215A (en) * | 2021-04-23 | 2021-07-23 | 大庆辰平钻井技术服务有限公司 | Chemical plugging method for high-water flooded layer of deflecting section of ultra-short radius horizontal well |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101016451A (en) * | 2007-02-27 | 2007-08-15 | 濮阳市易发化工有限公司 | Compositions and preparation and use thereof |
| CN101086210A (en) * | 2007-07-13 | 2007-12-12 | 辽河石油勘探局 | Profile control and water plugging technology for coal bed gas |
| CN101158280A (en) * | 2007-01-29 | 2008-04-09 | 邹积鹏 | Oil well high water-bearing layer pressure blocking method |
| CN101280678A (en) * | 2008-05-09 | 2008-10-08 | 大庆汇联技术开发有限公司 | Oil well chemical gorge and disgorge yield increasing and inverse direction regulating block connection working process |
| CN101528889A (en) * | 2006-08-17 | 2009-09-09 | 普拉德研究及开发股份有限公司 | Friction reduction fluids |
| CN101638979A (en) * | 2008-07-31 | 2010-02-03 | 陕西海天石油科技有限公司 | Technology for water shutoff, leaking stoppage and secondary well cementation of oil-water wells |
| CN102134986A (en) * | 2011-04-29 | 2011-07-27 | 中国石油集团川庆钻探工程有限公司 | Production-increasing method by water-plugging and fracturing |
-
2012
- 2012-10-31 CN CN201210427051.3A patent/CN102926701B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101528889A (en) * | 2006-08-17 | 2009-09-09 | 普拉德研究及开发股份有限公司 | Friction reduction fluids |
| CN101158280A (en) * | 2007-01-29 | 2008-04-09 | 邹积鹏 | Oil well high water-bearing layer pressure blocking method |
| CN101016451A (en) * | 2007-02-27 | 2007-08-15 | 濮阳市易发化工有限公司 | Compositions and preparation and use thereof |
| CN101086210A (en) * | 2007-07-13 | 2007-12-12 | 辽河石油勘探局 | Profile control and water plugging technology for coal bed gas |
| CN101280678A (en) * | 2008-05-09 | 2008-10-08 | 大庆汇联技术开发有限公司 | Oil well chemical gorge and disgorge yield increasing and inverse direction regulating block connection working process |
| CN101638979A (en) * | 2008-07-31 | 2010-02-03 | 陕西海天石油科技有限公司 | Technology for water shutoff, leaking stoppage and secondary well cementation of oil-water wells |
| CN102134986A (en) * | 2011-04-29 | 2011-07-27 | 中国石油集团川庆钻探工程有限公司 | Production-increasing method by water-plugging and fracturing |
Non-Patent Citations (6)
| Title |
|---|
| 冯玉军等: "阳离子聚丙烯酰胺"水包水乳液"的制备及在油田污水处理中的应用", 《油田化学》, vol. 24, no. 1, 25 March 2007 (2007-03-25), pages 42 - 47 * |
| 崔丽艳: "改性阳离子聚丙烯酰胺的合成及絮凝性能研究", 《中国优秀硕士学位论文全文数据库工程科技I辑》, vol. 2012, no. 4, 15 April 2012 (2012-04-15), pages 50 * |
| 李海营等: "高温高盐油藏化学堵水技术", 《石油钻采工艺》, vol. 24, no. 5, 31 May 2002 (2002-05-31), pages 50 - 52 * |
| 李良雄等: "应用于高温高盐油田的凝胶类堵水剂", 《油气采收率技术》, vol. 5, no. 2, 30 June 1998 (1998-06-30) * |
| 王中华: "AM/ AMPS/木质素磺酸接枝共聚物降滤失剂的合成与性能", 《精细石油化工进展》, vol. 6, no. 11, 30 November 2005 (2005-11-30), pages 1 - 3 * |
| 范艳玲等: "挤堵井不反洗带压候凝工艺技术", 《内蒙古石油化工》, vol. 30, no. 12, 31 December 2004 (2004-12-31), pages 140 - 141 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321606A (en) * | 2013-07-02 | 2013-09-25 | 中国石油集团川庆钻探工程有限公司 | Low-permeability fractured reservoir oil well water-plugging and screening method |
| CN103321606B (en) * | 2013-07-02 | 2016-05-04 | 中国石油集团川庆钻探工程有限公司 | A kind of Fracture with low permeability oil reservoir oilwell water shutoff screen method |
| CN103865504A (en) * | 2014-03-10 | 2014-06-18 | 东北石油大学 | Gel double-solution plugging regulating agent of steam injection well for thermal recovery and plugging regulating method using gel double-solution plugging regulating agent |
| CN103865503A (en) * | 2014-03-10 | 2014-06-18 | 东北石油大学 | Novel high-temperature resistant inorganic particle-gel compound double-liquid blocking agent and blocking method thereof |
| CN103865510A (en) * | 2014-03-10 | 2014-06-18 | 东北石油大学 | Thermal-recovery injection well gel single-liquid modifying and flooding agent and modifying and flooding method thereof |
| CN103865503B (en) * | 2014-03-10 | 2016-08-17 | 东北石油大学 | High temperature resistant inorganic granulated gel compounds double-liquid seal blocking agent and method for blocking thereof |
| CN104121000A (en) * | 2014-07-11 | 2014-10-29 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Low-permeability fractured reservoir cased hole completion horizontal well water plugging method |
| CN105201449A (en) * | 2015-10-14 | 2015-12-30 | 中国石油集团长城钻探工程有限公司 | Water plugging method for thickened oil thermal recovery horizontal well |
| CN113153215A (en) * | 2021-04-23 | 2021-07-23 | 大庆辰平钻井技术服务有限公司 | Chemical plugging method for high-water flooded layer of deflecting section of ultra-short radius horizontal well |
| CN113153215B (en) * | 2021-04-23 | 2022-11-29 | 大庆辰平钻井技术服务有限公司 | Chemical plugging method for high-water-flooded layer of deflecting section of ultra-short radius horizontal well |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102926701B (en) | 2015-08-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102926701B (en) | A kind of mixed matching water-plugging technology method continuously | |
| CN103321606B (en) | A kind of Fracture with low permeability oil reservoir oilwell water shutoff screen method | |
| CN106050213B (en) | A kind of sandstone reservoir low damage distributary acid method | |
| CN103725277B (en) | A kind of fiber composite temporary plugging agent | |
| CN101787864B (en) | Method for plugging water from oil reservoir fractured water logging oil well developed by injecting water into low-permeable reservoir stratum | |
| CN102587858B (en) | Method for blocking water for fracture and hole type reservoir | |
| CN104109514B (en) | A kind of sealing agent system for permanent closure multilamellar low pressure macropore oil reservoir and Technology | |
| CN102011572B (en) | Composite high-temperature profile control method for heavy oil well | |
| CN103694976B (en) | A kind of acid fracturing fiber temporary plugging agent | |
| CN104514531A (en) | Method for profile control and water shutoff in two-fluid process for three-low sandstone reservoir | |
| CN106246150A (en) | A kind of oil field compression fracture remodeling method | |
| CN103410486B (en) | A kind of three-in-one compound displacement technique for oil field deep transfer drive | |
| CN105317415B (en) | Stitch net fracturing technology method | |
| RU2012103925A (en) | METHOD FOR CORRECTING A ZONE INSIDE THE UNDERGROUND CONTAINING HYDROCARBON HYDROGEN (OPTIONS) | |
| CN107686724B (en) | Ultralow-water-content carbon dioxide fracturing fluid and preparation method thereof | |
| CN110484229B (en) | Composite oil displacement system for low-permeability oil reservoir and preparation and application methods thereof | |
| CN101915079B (en) | Integrated de-plugging yield increasing process | |
| CN105985762B (en) | A kind of fracturing fluid and preparation method thereof | |
| CN104762072A (en) | Penetrating selective plugging agent and preparation method and application method thereof | |
| CA2922848A1 (en) | Carbonate based slurry fracturing using solid acid for unconventional reservoirs | |
| CN103087699A (en) | Sand-carrying profile control agent composition of fracture-cave type oil deposit and profile control method of profile control agent | |
| CN103628846A (en) | Method for improving CO2 displacement efficiency of low-permeability reservoir | |
| CN103468237A (en) | Clean fracturing fluid and preparation method thereof | |
| CN108625836B (en) | Water control and yield increase method for low-permeability bottom water reservoir high-water-content oil well | |
| CN104121000A (en) | Low-permeability fractured reservoir cased hole completion horizontal well water plugging method |
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 | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201028 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Chuanqing Drilling Engineering Co.,Ltd. Address before: The 1 section of No. 3 company Chuanqing Drilling Technology Information Office Chenghua District Green Road 610051 Chengdu City, Sichuan Province Patentee before: CNPC Chuanqing Drilling Engineering Co.,Ltd. |