CN102977864A - High-temperature coring sealing fluid and production process thereof - Google Patents
High-temperature coring sealing fluid and production process thereof Download PDFInfo
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- CN102977864A CN102977864A CN2011102659715A CN201110265971A CN102977864A CN 102977864 A CN102977864 A CN 102977864A CN 2011102659715 A CN2011102659715 A CN 2011102659715A CN 201110265971 A CN201110265971 A CN 201110265971A CN 102977864 A CN102977864 A CN 102977864A
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Abstract
The present invention relates to a high-temperature coring sealing fluid which is applies to deep well and ultra-deep well sealed coring for obtaining deep formation physical parameters in petroleum exploration and development, and has the function of protecting a core. The high-temperature coring sealing fluid is composed of a high-temperature environmentally-friendly plasticizer A, a high-temperature resin B, a colloidal blocking agent C, and a high-temperature thickener D. Materials for production of the sealing fluid come from a wide variety of sources, the process is simple, and the reaction is controllable; and the sealing fluid can resist temperature as high as 180 DEG C, and has the characteristics of relatively good flowability, long spinning, good adhesion, good compatibility with the drilling fluid, etc.
Description
Technical field
The present invention relates to the sealing fluid that the drilling well sealing core drill is used in a kind of petroleum exploration and development, specifically, relate to the sealing core drill sealing fluid under the high temperature in deep-well, ultra deep well.
Background technology
Domestic at present, the sealing fluid that the drilling well sealing core drill uses has: water base, oil base and synthesized base sealing fluid.This invention of water base sealing liquid (patent 89109600.0) is the water base sealing liquid that utilizes Natvosol and polyacrylamide, Repone K etc. to make, this water base sealing liquid exists temperature resistance poor, (well depth is less than 3000 meters to be mainly used in shallow well and middle-deep well, the well temperature is lower than 100 ℃) sealed coring, be not suitable for deep-well and use.Existing oil-based sealing fluid comprises Viscotrol C oil-based sealing fluid, environment-friendly oil-based sealing fluid (patent 200810188682.8) and high effective sealing liquid (patent 93119352.4).Wherein Viscotrol C oil-based sealing fluid manufacturing condition is wayward, and the generation with some toxic gases, contaminate environment, impact production and workmen's is healthy, normal operation temperature range less (in 135 ℃), rising with temperature, its reduced viscosity is serious, and high temperature stability performance is poor, does not reach the requirement of deep-well and ultra deep well sealing core drill.The main raw material(s) of high effective sealing liquid adopts the viscous crude in the crude oil, generate a kind of mixed solution after adding sulfuric acid sulfonation, although its starting material source of this invention is wide, cost is low, compound method is simple and easy to do, main component is the viscous crude in the crude oil, and this can affect the original physical parameter of rock core; Environment-friendly oil-based sealing fluid, it mainly forms with vegetables oil, propolis and emulsifying agent.Its viscosity was all low severe after these two kinds of sealing fluid temperature of high effective sealing liquid and environment-friendly oil-based sealing fluid were elevated to 100 ℃, caused poor adhesive force, for deep-well or have than the stratum of the large fracture obturation effect variation of coring.Synthesized base sealing fluid (patent 02110114.0) is a kind of take ester plasticizer and resin, plugging agent as main raw material(s), the advantages such as this sealing fluid Applicable temperature scope is wide-27 ℃～150 ℃, nontoxic, obturation effect is good, but this sealing fluid is not suitable for untra deep coring.
The present invention compared with prior art has following advantage: high-temperature closed liquid temperature resistance provided by the invention reaches 180 ℃, have mobile better, reel off raw silk from cocoons long, tack is good, with the characteristics such as the drilling fluid compatibleness is good, be applicable to deep-well and ultra deep well sealing core drill.High temperature Sealing Fluid for Coring of the present invention is first totally 16 barrels of northeast, river unit dam 123 ultra deep well sealing core drills, accumulative total coring footage 132.31m, and average yield rate 81.38%, airtight rate 93.3%, wherein 11 barrels of airtight rates reach 100%, the high target of wound this area sealing core drill.This sealing fluid successfully is at high temperature, hydrogen sulfide content more than 150 ℃ that 180ppm, stratum are smashed to pieces for the first time, carry out sealing core drill in the fracture development stratum, create the most deep domestic new record of coring that closes, indicate that Temperature Deep Sealing Fluid for Coring of the present invention development has obtained new breakthrough.
Summary of the invention
For the weak point of existing Sealing Fluid for Coring, the invention provides a kind of high temperature Sealing Fluid for Coring, be used for deep-well and ultra deep well sealing core drill.General Sealing Fluid for Coring use temperature scope less (in 135 ℃), with the rising of temperature, its reduced viscosity is serious, and high temperature stability performance is poor, does not reach the requirement of deep-well and ultra deep well sealing core drill.Purpose of the present invention is exactly to provide the Sealing Fluid for Coring that uses under a kind of high temperature for deep-well and ultra deep well.
The present invention is achieved in that the high temperature Sealing Fluid for Coring is comprised of high temperature resistant environment-protective plasticizer A (modification DOP, modification DBP, polyoxyethylene glycol benzoic ether), fire resistant resin B (polyamide resin, modified PVC resin, low pressure polyethylene resin), colloid plugging agent C (biological calcium powder, mineral powder, non-seepage formation sealant, limestone powder), high-temperature thickening agent D (high-quality with slurry soil, sepiolite, hydroxyl polymeric aluminum, aluminium base polymkeric substance); It is extensive to produce this sealing fluid material source, and technique is simple, reacts controlled; Product performance are stable, and temperature resistance is good, and is nontoxic.This high temperature Sealing Fluid for Coring raw material quality is such as descending A: B: C: D=80～100: 3～8: 10～25: 5～15..
The production technique of this Temperature Deep Sealing Fluid for Coring: in the reactor of cleaning drying, add high temperature resistant environment-protective plasticizer A (modification DOP), in situation about stirring, be warming up to 80 ℃～150 ℃, add fire resistant resin B, be stirred to fully dissolving; Then add successively colloid plugging agent C, high-temperature thickening agent D, stir, produce and obtain the high temperature Sealing Fluid for Coring.
Embodiment
The invention will be further described below by embodiment, but the present invention is not limited only to these examples.
Embodiment 1
At first, according to high temperature resistant environment-protective plasticizer A (modification DOP): fire resistant resin B: colloid plugging agent C: high-temperature thickening agent D is 80: 3: 10: 5 ratio is ready to starting material, then in the reactor of cleaning drying, add high temperature resistant environment-protective plasticizer A (modification DOP), in situation about stirring, be warming up to 80 ℃～150 ℃, add fire resistant resin B, be stirred to fully dissolving; Add successively at last colloid plugging agent C, high-temperature thickening agent D, stir, produce and obtain the high temperature Sealing Fluid for Coring, go out still, in the bucket of packing into.
Embodiment 2
At first, according to high temperature resistant environment-protective plasticizer A (modification DOP): fire resistant resin B: colloid plugging agent C: high-temperature thickening agent D is 200: 8: 25: 15 ratio is ready to starting material, then in the reactor of cleaning drying, add high temperature resistant environment-protective plasticizer A (modification DOP), in situation about stirring, be warming up to 80 ℃～150 ℃, add fire resistant resin B, be stirred to fully dissolving; Add successively at last colloid plugging agent C, high-temperature thickening agent D, stir, produce and obtain the high temperature Sealing Fluid for Coring, go out still, in the bucket of packing into.
Claims (3)
1. high temperature Sealing Fluid for Coring, it is characterized in that this high-temperature closed liquid is a kind of with the high temperature resistant environment-protective plasticizer A, fire resistant resin B, colloid plugging agent C, high-temperature thickening agent D is the sealing fluid of main raw material(s), wherein, the high temperature resistant environment-protective plasticizer A is modification DOP, modification DBP, a kind of in the polyoxyethylene glycol benzoic ether, fire resistant resin B is polyamide resin, a kind of in modified PVC resin or the low pressure polyethylene resin, colloid plugging agent C is biological calcium powder, mineral powder, non-seepage formation sealant, in the limestone powder one or both, high-temperature thickening agent D are high-quality with slurry soil, sepiolite, hydroxyl polymeric aluminum, organophilic clay, in the aluminium base polymkeric substance one or both.
2. according to claim 1 described high temperature Sealing Fluid for Coring, it is characterized in that raw material quality such as lower, A: B: C: D=80～100: 3～8: 10～25: 5～15.
3. the production technique of high temperature Sealing Fluid for Coring according to claim 1 and 2 is characterized in that under 80 ℃～150 ℃ temperature fire resistant resin B being dissolved in the high temperature resistant environment-protective plasticizer A fully; Then add successively colloid plugging agent C, high-temperature thickening agent D, make its Uniform Dispersion wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011102659715A CN102977864A (en) | 2011-09-03 | 2011-09-03 | High-temperature coring sealing fluid and production process thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102659715A CN102977864A (en) | 2011-09-03 | 2011-09-03 | High-temperature coring sealing fluid and production process thereof |
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| CN102977864A true CN102977864A (en) | 2013-03-20 |
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| CN2011102659715A Pending CN102977864A (en) | 2011-09-03 | 2011-09-03 | High-temperature coring sealing fluid and production process thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4536297A (en) * | 1982-01-28 | 1985-08-20 | Halliburton Company | Well drilling and completion fluid composition |
| US20030104949A1 (en) * | 2001-12-03 | 2003-06-05 | Myers Kent R. | Composition for use in sealing a porous subterranean formation, and methods of making and using |
| CN1183220C (en) * | 2002-03-14 | 2005-01-05 | 胜利石油管理局钻井工艺研究院 | Synthesized base sealing fluid and its production technique |
| CN1978584A (en) * | 2005-12-07 | 2007-06-13 | 中国石油大学（华东）石油工程学院 | Harm-free core-drilling fluid, and its preparing method and use |
| CN101921581A (en) * | 2009-06-09 | 2010-12-22 | 中国石油集团西部钻探工程有限公司克拉玛依钻井工艺研究院 | High-performance oil-based sealing liquid and preparation method thereof |
-
2011
- 2011-09-03 CN CN2011102659715A patent/CN102977864A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4536297A (en) * | 1982-01-28 | 1985-08-20 | Halliburton Company | Well drilling and completion fluid composition |
| US20030104949A1 (en) * | 2001-12-03 | 2003-06-05 | Myers Kent R. | Composition for use in sealing a porous subterranean formation, and methods of making and using |
| CN1183220C (en) * | 2002-03-14 | 2005-01-05 | 胜利石油管理局钻井工艺研究院 | Synthesized base sealing fluid and its production technique |
| CN1978584A (en) * | 2005-12-07 | 2007-06-13 | 中国石油大学（华东）石油工程学院 | Harm-free core-drilling fluid, and its preparing method and use |
| CN101921581A (en) * | 2009-06-09 | 2010-12-22 | 中国石油集团西部钻探工程有限公司克拉玛依钻井工艺研究院 | High-performance oil-based sealing liquid and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 卢寿慈等: "《粉体技术手册》", 31 July 2004, 化学工业出版社 * |
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Application publication date: 20130320 |