CN102344788A - Temporary plugging agent for horizontal well staged fracturing of controllable rubber breaking and preparation method thereof - Google Patents
Temporary plugging agent for horizontal well staged fracturing of controllable rubber breaking and preparation method thereof Download PDFInfo
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- CN102344788A CN102344788A CN2010105503278A CN201010550327A CN102344788A CN 102344788 A CN102344788 A CN 102344788A CN 2010105503278 A CN2010105503278 A CN 2010105503278A CN 201010550327 A CN201010550327 A CN 201010550327A CN 102344788 A CN102344788 A CN 102344788A
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- temporary plugging
- plugging agent
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- horizontal well
- rubber
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Abstract
The invention relates to a temporary plugging agent for the horizontal well staged fracturing of controllable rubber breaking and a preparation method thereof. The temporary plugging agent consists of diol, an inorganic oxidation strengthening agent, borate, sodium bicarbonate, a controlled-release microcapsule rubber-breaking agent and water, wherein the weight ratio of the components is (10-14): (5-8): (1-1.5): 3: (2-3): 100; the diol is white powder or particles, the molecular weight is 70-100 thousands; the inorganic oxidation strengthening agent is magnesium oxide or aluminum oxide; and the controlled-release microcapsule rubber-breaking agent is covered citric acid or solid nitric acid which is obtained by the boiling granulating technology. The temporary plugging agent performs a crosslinking reaction under 70-90 DEG C of well temperature to form a rubber plug which can bear more than 30MPa of differential pressure, thus the fracturing construction can be performed smoothly; and after fracturing, the capsule dressings of the controlled-release microcapsule rubber-breaking agent are damaged and the viscosity of the rubber-breaking solution is less than 10mPa.s, thus the temporary plugging agent is hydrated and degraded and then is discharged out of the ground through flowback and the harm to the formation is lower.
Description
Technical field
The horizontal well in segments pressure break that the present invention relates to a kind of controlled broken glue is with temporary plugging agent and preparation method thereof.
Background technology
The income of horizontal well is more paid attention to than Vertical Well in heavy oil layer and thick oil pay exploitation much larger than the drilling and well completion expense in the recovery process in oil field.Can relate in the horizontal well transformation process and use the segmenting perforating fracturing technique, after promptly first section pressing crack construction finishes, adopt chemistry or mechanical means fracturing section with treat that fracturing section separates, thereby zone of interest is effectively transformed.
For the well of improving the standard is effectively transformed hop count, each major oil companies begins to research and develop mutually unexpectedly horizontal well in segments again and transforms temporary plugging agent.United States Patent (USP) 4137182 adopts polyacrylamide and chromium cross linker formation gel to carry out pressure break, utilizes the automatic aquation of gel to break glue behind the injection stratum 24h, and the gel compressive strength that this technology forms is low, and broken glue is not thorough, and is bigger to formation damage behind the broken glue.United States Patent (USP) 6187839 adopts high salinity salts solution, azo class water soluble starter and monomer to form high-intensity shutoff, but can not break glue, produces nonvolatil obstruction.United States Patent (USP) 6169058 adopts suction varicosity particle to be used for hydraulic fracturing technology, but this technology is difficult to form whole shutoff at horizontal section.The temporary plugging agent of using mainly contains at present: inertia organic resin, solid organic acid (M-nitro benzoic acid that uses like the U.S. can slowly dissolve in water and oil), the polymkeric substance of meeting acid-swellable, inert solid (like silica flour, Paris white, rock salt, oil-soluble resin, shutoff bead) etc.Wherein most widely used is polymkeric substance and shutoff bead; Wherein the polymkeric substance temporary plugging agent is because its firm chemically crosslinked network structure, and plugging effect is good, but exists broken glue slowly even be difficult to brokenly the phenomenon of glue; The row of returning is not thorough, can cause injury to a certain degree to the stratum; The shutoff bead has the plugging strength height, is out of shape little characteristics, but shortcoming be prone to come off, plugging effect is poor, form and stop up if be embedded in the borehole place, thereby also can not self-dissolving be difficult to remove because of it.
Summary of the invention
The horizontal well in segments pressure break that the purpose of this invention is to provide a kind of controlled broken glue is with temporary plugging agent and preparation method thereof, realizes the effective shutoff of lateral segment, and can effectively break glue and return row and can not cause possible permanent damage to reservoir.
The horizontal well in segments pressure break of controlled broken glue of the present invention with temporary plugging agent by dibasic alcohol; Inorganic oxide toughener, borate, sodium hydrogencarbonate, slow-release microcapsule gel breaker and water are formed, and the weight ratio of above-mentioned each component is 10-14: 5-8: 1-1.5: 3: 2-3: 100.
Described dibasic alcohol (comprise but be not limited to polyvinyl alcohol) is white powder or particle, and its molecular weight is 70,000-100,000.
Described inorganic oxide toughener includes but not limited to Natural manganese dioxide, aluminum oxide.
Described slow-release microcapsule gel breaker is for coating Hydrocerol A or solid nitric acid through the boiling granulating technology.
The horizontal well in segments pressure break of this controlled broken glue is following with the preparation method of temporary plugging agent:
1, at ambient temperature, with dibasic alcohol, inorganic oxide toughener, borate, sodium hydrogencarbonate, slow-release microcapsule gel breaker raw material proportionally mix.
2, said mixture material and water are proportionally slowly added in the entry under agitation condition, continue to stir the horizontal well in segments pressure break temporary plugging agent that can obtain controlled broken glue of the present invention in 10 minutes after stirring again.
Through verification experimental verification, the horizontal well in segments pressure break of the controlled broken glue of the present invention can tolerate the pressure reduction of 30MPa with temporary plugging agent behind 60min crosslinking curing under 70 ℃～90 ℃ well temperature conditions, thereby guarantees carrying out smoothly of pressing crack construction.After pressing crack construction finished, the slow-release microcapsule gel breaker capsule clothing in the system destroyed, thereby destroyed the crosslinking structure of cross-linking system, and breaking glue solution viscosity makes the degraded of temporary plugging agent aquation less than 10mPas, all discharges ground through the row of returning, and is less to formation damage.
The present invention compared with prior art has the following advantages:
1, adopted dibasic alcohol and borax cross-linking system, can be through selecting different diols material and borax dosage controlling reaction time.
2, adopted acid capsule breaker, realized that the broken glue time is controlled, reached and thoroughly to break the purpose that glue returns row after plug is pressed.
3, present method has bigger production handiness, can adjust products scheme as required; Simple to operate.
Embodiment
Embodiment 1:
Under 25 ℃ of conditions of normal temperature, place beaker to stir 6g polyvinyl alcohol pellet, 8g polyvinyl alcohol powder, 6g Natural manganese dioxide, 1.5g borax, the acid microcapsule degelling agent of 3g, 3g sodium hydrogencarbonate.Under agitation condition, slowly add in the 100g water said mixture material then; After adding, continues again mixture to stir 10 minutes; Can be made into fractured horizontal well construction temporary plugging agent; This temporary plugging agent forms the good plug of intensity after time is coagulated 1h under 70 ℃ of conditions; Behind the broken glue, breaking glue solution viscosity is less than 10mPa.S.
Embodiment 2:
Under 25 ℃ of conditions of normal temperature, place beaker to stir 10g polyvinyl alcohol pellet, 4g polyvinyl alcohol powder, 6g Natural manganese dioxide, 1.5g borax, the acid microcapsule degelling agent of 2.5g, 3g sodium hydrogencarbonate.Under agitation condition, slowly add in the 100g water said mixture material then; After adding, continues again mixture to stir 10 minutes; Can be made into fractured horizontal well construction temporary plugging agent; This temporary plugging agent forms the good plug of intensity after time is coagulated 1h under 80 ℃ of conditions; Behind the broken glue, breaking glue solution viscosity is less than 10mPa.S.
Embodiment 3:
Under 25 ℃ of conditions of normal temperature, place beaker to stir 12g polyvinyl alcohol pellet, 2g polyvinyl alcohol powder, 26g Natural manganese dioxide, 1.5g borax, the acid microcapsule degelling agent of 2g, 3g sodium hydrogencarbonate.Under agitation condition, slowly add in the 100g water said mixture material then; After adding, continues again mixture to stir 10 minutes; Can be made into fractured horizontal well construction temporary plugging agent; This temporary plugging agent forms the good plug of intensity after time is coagulated 30min under 90 ℃ of conditions; Behind the broken glue, breaking glue solution viscosity is less than 10mPa.S.
Claims (2)
1. the horizontal well in segments pressure break temporary plugging agent of a controlled broken glue; It is characterized in that: be by dibasic alcohol; Inorganic oxide toughener, borate, sodium hydrogencarbonate, slow-release microcapsule gel breaker and water are formed, and the weight ratio of each component is 10-14: 5-8: 1-1.5: 3: 2-3: 100;
Described dibasic alcohol is white powder or particle, and its molecular weight is 7-10 ten thousand;
Described inorganic oxide toughener is Natural manganese dioxide or aluminum oxide;
Described slow-release microcapsule gel breaker is for to obtain coating Hydrocerol A or solid nitric acid through the boiling granulating technology.
2. the horizontal well in segments pressure break of the described controlled broken glue of claim 1 is with the preparation method of temporary plugging agent; It is characterized in that: at ambient temperature; Dibasic alcohol, borate, inorganic oxide toughener, slow-release microcapsule gel breaker, sodium hydrogencarbonate raw material is even according to the mixed described in the claim 1; Then compound is slowly added under agitation condition in the entry, stir and to obtain horizontal well in segments pressure break temporary plugging agent after 10 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010550327 CN102344788B (en) | 2010-11-18 | 2010-11-18 | Temporary plugging agent for horizontal well staged fracturing of controllable rubber breaking and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010550327 CN102344788B (en) | 2010-11-18 | 2010-11-18 | Temporary plugging agent for horizontal well staged fracturing of controllable rubber breaking and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102344788A true CN102344788A (en) | 2012-02-08 |
| CN102344788B CN102344788B (en) | 2013-07-31 |
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| CN 201010550327 Active CN102344788B (en) | 2010-11-18 | 2010-11-18 | Temporary plugging agent for horizontal well staged fracturing of controllable rubber breaking and preparation method thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103422834A (en) * | 2013-07-15 | 2013-12-04 | 中国石油天然气股份有限公司 | Oil well blocking agent and application thereof |
| CN103571447A (en) * | 2012-08-03 | 2014-02-12 | 中国石油化工股份有限公司 | Self-cleaning temporary plugging agent for drilling fluid and preparation method of self-cleaning temporary plugging agent |
| CN105441046A (en) * | 2015-11-25 | 2016-03-30 | 长江大学 | Hydrogen-bonding hydrogel suitable for plugging cracks and caves |
| CN106883832A (en) * | 2017-04-01 | 2017-06-23 | 武汉理工大学 | A kind of controllable diverting agent of environment-friendly type and preparation method thereof |
| CN109233773A (en) * | 2018-11-06 | 2019-01-18 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | The non-linear self-degradation diverting agent of more cluster fracturing reforms and preparation method in a kind of section |
| WO2020138252A1 (en) * | 2018-12-27 | 2020-07-02 | 三菱ケミカル株式会社 | Diverting agent and method for occluding cracks on well using same |
| WO2020166595A1 (en) * | 2019-02-13 | 2020-08-20 | 三菱ケミカル株式会社 | Diverting agent and method for closing crack in well using same |
| CN111720102A (en) * | 2020-06-05 | 2020-09-29 | 青岛鑫源晟石油科技有限公司 | Fine temporary plugging volume fracturing process technology replacing mechanical packing |
| CN113372897A (en) * | 2021-05-11 | 2021-09-10 | 陕西天成旭化工科技有限公司 | Polymer acidic cross-linking agent and preparation method thereof |
| CN113565486A (en) * | 2020-04-29 | 2021-10-29 | 中国海洋石油集团有限公司 | Temporary coating particles for acid fracturing fracture wall surface and temporary coating acid fracturing method thereof |
| CN113583643A (en) * | 2021-07-24 | 2021-11-02 | 固安国勘石油技术有限公司 | Novel environment-friendly fracturing temporary plugging agent and application facility thereof |
| WO2022085796A1 (en) * | 2020-10-23 | 2022-04-28 | 三菱ケミカル株式会社 | Diverting agent, method for temporarily plugging crack in well with use of same, and method for having crack further propagate |
| CN115838589A (en) * | 2022-12-16 | 2023-03-24 | 中国石油大学(华东) | High-strength particle temporary plugging agent for fracturing diversion and preparation method and application thereof |
| CN115838589B (en) * | 2022-12-16 | 2024-04-19 | 中国石油大学(华东) | High-strength particle temporary plugging agent for fracturing diversion and preparation method and application thereof |
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| CN106479477B (en) * | 2015-08-31 | 2020-10-23 | 中国石油化工股份有限公司 | Encapsulated solid acid and preparation and application thereof |
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| US20050211435A1 (en) * | 2004-03-26 | 2005-09-29 | Terry Monroe | Method of forming temporary blocking gel containing guar derivative |
| CN101787864A (en) * | 2010-03-15 | 2010-07-28 | 中国石油集团川庆钻探工程有限公司 | Method for plugging water from oil reservoir fractured water logging oil well developed by injecting water into low-permeable reservoir stratum |
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2010
- 2010-11-18 CN CN 201010550327 patent/CN102344788B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20050211435A1 (en) * | 2004-03-26 | 2005-09-29 | Terry Monroe | Method of forming temporary blocking gel containing guar derivative |
| CN101787864A (en) * | 2010-03-15 | 2010-07-28 | 中国石油集团川庆钻探工程有限公司 | Method for plugging water from oil reservoir fractured water logging oil well developed by injecting water into low-permeable reservoir stratum |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103571447A (en) * | 2012-08-03 | 2014-02-12 | 中国石油化工股份有限公司 | Self-cleaning temporary plugging agent for drilling fluid and preparation method of self-cleaning temporary plugging agent |
| CN103422834A (en) * | 2013-07-15 | 2013-12-04 | 中国石油天然气股份有限公司 | Oil well blocking agent and application thereof |
| CN105441046A (en) * | 2015-11-25 | 2016-03-30 | 长江大学 | Hydrogen-bonding hydrogel suitable for plugging cracks and caves |
| CN105441046B (en) * | 2015-11-25 | 2018-04-20 | 长江大学 | Suitable for crack and the hydrogen bond hydrogel of solution cavity leak stopping |
| CN106883832A (en) * | 2017-04-01 | 2017-06-23 | 武汉理工大学 | A kind of controllable diverting agent of environment-friendly type and preparation method thereof |
| CN109233773A (en) * | 2018-11-06 | 2019-01-18 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | The non-linear self-degradation diverting agent of more cluster fracturing reforms and preparation method in a kind of section |
| WO2020138252A1 (en) * | 2018-12-27 | 2020-07-02 | 三菱ケミカル株式会社 | Diverting agent and method for occluding cracks on well using same |
| CN113227168A (en) * | 2018-12-27 | 2021-08-06 | 三菱化学株式会社 | Diverter and method for plugging cracks in well using same |
| CN113412285A (en) * | 2019-02-13 | 2021-09-17 | 三菱化学株式会社 | Diverting agent and method for blocking cracks in well using same |
| WO2020166595A1 (en) * | 2019-02-13 | 2020-08-20 | 三菱ケミカル株式会社 | Diverting agent and method for closing crack in well using same |
| US11674073B2 (en) | 2019-02-13 | 2023-06-13 | Mitsubishi Chemical Corporation | Diverting agent and method of filling fracture in well using same |
| CN113565486A (en) * | 2020-04-29 | 2021-10-29 | 中国海洋石油集团有限公司 | Temporary coating particles for acid fracturing fracture wall surface and temporary coating acid fracturing method thereof |
| CN111720102A (en) * | 2020-06-05 | 2020-09-29 | 青岛鑫源晟石油科技有限公司 | Fine temporary plugging volume fracturing process technology replacing mechanical packing |
| WO2022085796A1 (en) * | 2020-10-23 | 2022-04-28 | 三菱ケミカル株式会社 | Diverting agent, method for temporarily plugging crack in well with use of same, and method for having crack further propagate |
| US11939855B2 (en) | 2020-10-23 | 2024-03-26 | Mitsubishi Chemical Corporation | Diverting agent, method for temporarily filling fracture in well using same, and method for further forming fracture |
| CN113372897A (en) * | 2021-05-11 | 2021-09-10 | 陕西天成旭化工科技有限公司 | Polymer acidic cross-linking agent and preparation method thereof |
| CN113583643A (en) * | 2021-07-24 | 2021-11-02 | 固安国勘石油技术有限公司 | Novel environment-friendly fracturing temporary plugging agent and application facility thereof |
| CN115838589A (en) * | 2022-12-16 | 2023-03-24 | 中国石油大学(华东) | High-strength particle temporary plugging agent for fracturing diversion and preparation method and application thereof |
| CN115838589B (en) * | 2022-12-16 | 2024-04-19 | 中国石油大学(华东) | High-strength particle temporary plugging agent for fracturing diversion and preparation method and application thereof |
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| Publication number | Publication date |
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| CN102344788B (en) | 2013-07-31 |
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