CN102604608A - Water shutoff agent for extra-low permeability oil reservoir - Google Patents
Water shutoff agent for extra-low permeability oil reservoir Download PDFInfo
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- CN102604608A CN102604608A CN2011103184446A CN201110318444A CN102604608A CN 102604608 A CN102604608 A CN 102604608A CN 2011103184446 A CN2011103184446 A CN 2011103184446A CN 201110318444 A CN201110318444 A CN 201110318444A CN 102604608 A CN102604608 A CN 102604608A
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- low permeability
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- plugging agent
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Abstract
The invention relates to a water shutoff agent for an extra-low permeability oil reservoir, and belongs to the technical field of oilfield development. The water shutoff agent is prepared by mixing an oil displacement agent, primary agents, a curing agent and water, wherein the oil displacement agent is petroleum sulfonate, fatty alcohol polyoxyethylene ether sulfate or a non-ionic surfactant; the primary agents are phenol and formaldehyde; and the curing agent is carboxylic acid, sulfonic acid or ammonium chloride. The invention has the beneficial effects that: the water shutoff agent has the initial state of aqueous solution and the initial viscosity of 3 to 10 mpa.s, and can be smoothly injected into the extra-low permeability oil reservoir; after the water shutoff agent is cured, a strong-strength solid matter is generated and closely and impermeably bonded with rocks, and has the water-phase breakthrough pressure of more than or equal to 35MPa, resistance to the temperature of 150 DEG C, the mineralization resistance of 25*10<4>mg/l, strong base resistance and strong acid resistance; and the requirements of permeability of less than 1*10<-3> mu m<2> and pore throat radius R of less than 8 mu m on the water shutoff of the extra-low permeability oil reservoir can be met.
Description
Technical field
The present invention relates to a kind of special LOW PERMEABILITY RESERVOIR plugging agent, belong to the oil-field development technical field, water soluble oils well water plugging agent that especially can the special LOW PERMEABILITY RESERVOIR well water of shutoff layer.
Background technology
Special LOW PERMEABILITY RESERVOIR often adopts waterflooding commingling production mode; Along with oil-field development, local water or the continuous propelling of injecting water are owing to reasons such as stratum nonuniformity, development plan or improper measures; Cause an oil field layer individual layer to be advanced by leaps and bounds; The well water fast rise causes the too early water logging of oil well, and output descends.It is big to present spillway discharge behind the LOW PERMEABILITY RESERVOIR well water, and pressure is high, and a day produce oil significantly reduces moisture rising after the water outlet.To special low-permeability layer water outlet, the main method of Oilfield using is chemical water plugging at present, is determining on the basis of water layer, adopts non-selective plugging agent to carry out water blockoff.Non-selective plugging agent commonly used has oil well cement; Resin type is like resol, urea-formaldehyde resin, epoxy resin, furfuryl alcohol resin, melamine formaldehyde resin etc.; The gel-type plugging agent is like SEPIGEL 305, partially hydrolyzed polyacrylamide, CMC 99.5, Natvosol, ethyloic polygalactomannan, hydroxyethyl polygalactomannan, sodium lignosulfonate, calcium lignin sulphonate etc.; The gel-type plugging agent is like acidic silicic acid gel and alkaline silicate gel; The sedimentation type plugging agent is like water glass and sodium hydroxide etc.But all there is certain problem:
Oil well cement generally stirs oil well cement, various additive and water and forms suspension-s, clamp-ons zone of interest with pump then.But there is certain particle diameter in it, can't inject low-permeability layer.Its minimum grain size of oil well cement commonly used at present is 10 μ m, and the pore throat radius R greater than special low-permeability layer can't inject;
Resene blocks up agent, usefulness be thermosetting resin, resin liquid gets into the stratum after diluting, under solidifying agent and action of temperature, be solidified into the solid resin with certain intensity and stop up hole.But it has certain viscosity, and initial viscosity is 150-200mpa.s, and it is solid difficult to inject, and thinner is organic solvent, and environment is polluted.
Gel-type blocks up agent, and promptly water-soluble polymer solution and linking agent inject the stratum, under formation condition, carries out crosslinkedly, generates the immobilising cancellated material that has.But it is not high pressure resistant, high temperature and high salinity.Require the processing layer penetration degree greater than 0.5 μ m
2, can not be used for low-permeability layer.
Gel-type blocks up agent, and intensity is low, can not satisfy the requirement of special LOW PERMEABILITY RESERVOIR water blockoff.
Sedimentation type blocks up agent, is utilized in reaction generation deposition in the stratum, stops up water-yielding stratum, and this stifled agent has not high voltage bearing shortcoming.
Summary of the invention
The objective of the invention is to have certain grain size or not high pressure resistant, high temperature and high salinity or environmentally harmful shortcoming, can't realize the requirement of special LOW PERMEABILITY RESERVOIR water blockoff, a kind of water-soluble special LOW PERMEABILITY RESERVOIR plugging agent is provided to above-mentioned existing plugging agent.
The present invention can reach through following technical scheme:
A kind of special LOW PERMEABILITY RESERVOIR plugging agent is mixed by detergent, host, solidifying agent and water.
Described detergent is sulfonated petro-leum, fatty alcohol polyoxyethylene ether sulfate or nonionogenic tenside.
Described fatty alcohol polyoxyethylene ether sulfate is dodecyl alcohol polyoxyethylene ether sodium sulfate, hexadecyl polyoxyethylenated alcohol sodium sulfate or hexadecyl polyoxyethylenated alcohol sodium sulfate.
Described nonionogenic tenside is dodecyl alcohol polyoxyethylene ether, polyoxyethylene octylphenol ether-10 or the intoxicated monopalmitate of Sorbitol Powder.
Described host is phenol and formaldehyde.
Described solidifying agent is carboxylic acid, sulfonic acid or ammonium chloride.
Described sulfonated petro-leum mass content is 0.1-0.2%.
The mass content of described fatty alcohol polyoxyethylene ether sulfate is 0.05-0.1%.
The mass content of said nonionogenic tenside is 0.03-0.06%.
Described phenol mass content is 15-20%.
Described formaldehyde mass content is 20-25%.
Described carboxylic acid is a Whitfield's ointment, and its mass content is 0.1-0.2%.
Described sulfonic acid is thionamic acid, and its mass content is 0.15-0.30%.
The mass content of said ammonium chloride is 0.5-1%.
Beneficial effect of the present invention is: this plugging agent original state is the aqueous solution, and initial viscosity is 3-10mpa.s, can inject special LOW PERMEABILITY RESERVOIR smoothly; After stifled agent is solidified, generate high-intensity solid matter, closely glued with rock; No perviousness; Water breakthrough pressure>=35MPa, heatproof reaches 150 ℃, and anti-salinity reaches 25*10
4Mg/l, anti-highly basic and strong acid can satisfy rate of permeation less than 1 * 10
-3μ m
2, the pore throat radius R is less than the requirement of the extra-low permeability oil reservoirs water blockoff of 8 μ m.
Embodiment
Embodiment 1: the present invention is mixed by detergent, host, solidifying agent and water, wherein:
The detergent sulfonated petro-leum; Host is phenol and formaldehyde, and solidifying agent is a Whitfield's ointment, and its mass percent is: sulfonated petro-leum: phenol and formaldehyde: Whitfield's ointment: water: 0.1: 35: 0.1: 64.8; In temperature was 80 ℃ water-bath, be 48 hours set time.
During construction, plugging agent of the present invention is injected zone of interest, inject the about 2-8 side of consumption, closing well reaction 48 hours, its water blockoff validity period can reach more than 8 months.In October, 2009 implemented water blockoff by Zhongyuan Oil Field literary composition 51-179 well, injects plugging agent 2 sides of the present invention, and production fluid is 31.9 tons/day before the water blockoff, 0.1 ton/day of produce oil, moisture 99.6%; Production fluid is 17.9 tons/day behind the water blockoff, and 4.9 tons/day of produce oils are moisture 72.7%, and validity period is 298 days, tired 1430.4 tons of the oil that increase.
Used component of other embodiment and consumption thereof see attached list 1
Subordinate list 1:
Claims (10)
1. special LOW PERMEABILITY RESERVOIR plugging agent is characterized in that: mixes by detergent, host, solidifying agent and water,
Described detergent is sulfonated petro-leum, fatty alcohol polyoxyethylene ether sulfate or nonionogenic tenside;
Described host is phenol and formaldehyde;
Described solidifying agent is carboxylic acid, sulfonic acid or ammonium chloride.
2. a kind of special LOW PERMEABILITY RESERVOIR plugging agent according to claim 1 is characterized in that: described fatty alcohol polyoxyethylene ether sulfate is dodecyl alcohol polyoxyethylene ether sodium sulfate, hexadecyl polyoxyethylenated alcohol sodium sulfate or stearyl alcohol polyethenoxy ether sodium sulfate.
3. a kind of special LOW PERMEABILITY RESERVOIR plugging agent according to claim 1 and 2 is characterized in that: described nonionogenic tenside is dodecyl alcohol polyoxyethylene ether, polyoxyethylene octylphenol ether-10 or the intoxicated monopalmitate of Sorbitol Powder.
4. a kind of special LOW PERMEABILITY RESERVOIR plugging agent according to claim 1, it is characterized in that: described sulfonated petro-leum mass content is 0.1-0.2%.
5. a kind of special LOW PERMEABILITY RESERVOIR plugging agent according to claim 1 and 2, it is characterized in that: the mass content of described fatty alcohol polyoxyethylene ether sulfate is 0.05-0.1%.
6. a kind of special LOW PERMEABILITY RESERVOIR plugging agent according to claim 3 is characterized in that: the intoxicated monopalmitate mass content of described dodecyl alcohol polyoxyethylene ether, polyoxyethylene octylphenol ether-10 or Sorbitol Powder is 0.03-0.06%.
7. a kind of special LOW PERMEABILITY RESERVOIR plugging agent according to claim 1, it is characterized in that: the mass content of described host is 35-45%.
8. a kind of special LOW PERMEABILITY RESERVOIR plugging agent according to claim 1, it is characterized in that: described phenol mass content is 15-20%.
9. a kind of special LOW PERMEABILITY RESERVOIR plugging agent according to claim 1, it is characterized in that: described formaldehyde mass content is 20-25%.
10. a kind of special LOW PERMEABILITY RESERVOIR plugging agent according to claim 1, it is characterized in that: the mass content of described solidifying agent is 0.75-1.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103184446A CN102604608A (en) | 2011-10-19 | 2011-10-19 | Water shutoff agent for extra-low permeability oil reservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103184446A CN102604608A (en) | 2011-10-19 | 2011-10-19 | Water shutoff agent for extra-low permeability oil reservoir |
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| CN102604608A true CN102604608A (en) | 2012-07-25 |
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| CN2011103184446A Pending CN102604608A (en) | 2011-10-19 | 2011-10-19 | Water shutoff agent for extra-low permeability oil reservoir |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103666429A (en) * | 2012-09-04 | 2014-03-26 | 中国石油天然气股份有限公司 | Surfactant mixed system for displacing oil from low-permeability oilfields |
| CN105400502A (en) * | 2015-11-06 | 2016-03-16 | 中石化石油工程技术服务有限公司 | High-pressure-bearing leakage blocking agent and preparation process thereof |
| CN106589230A (en) * | 2015-10-20 | 2017-04-26 | 中国石油化工股份有限公司 | Water-swellable polymer microspheres and preparation method thereof |
| CN106589228A (en) * | 2015-10-20 | 2017-04-26 | 中国石油化工股份有限公司 | Low permeability reservoir flooding microemulsion system and preparation method thereof |
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| US20040020651A1 (en) * | 2002-08-01 | 2004-02-05 | Burts Boyce Donald | Well plug additive, well plug treatment fluid made therefrom, and method of plugging a well |
| CN1978497A (en) * | 2005-12-09 | 2007-06-13 | 中国石油天然气股份有限公司 | Multi-speed catalysed phenolic resin gel and its use |
| US7762329B1 (en) * | 2009-01-27 | 2010-07-27 | Halliburton Energy Services, Inc. | Methods for servicing well bores with hardenable resin compositions |
| 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 |
| CN102093880A (en) * | 2010-12-28 | 2011-06-15 | 中国石油大学(华东) | Water control agent for oil well and preparation method thereof |
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2011
- 2011-10-19 CN CN2011103184446A patent/CN102604608A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040020651A1 (en) * | 2002-08-01 | 2004-02-05 | Burts Boyce Donald | Well plug additive, well plug treatment fluid made therefrom, and method of plugging a well |
| CN1978497A (en) * | 2005-12-09 | 2007-06-13 | 中国石油天然气股份有限公司 | Multi-speed catalysed phenolic resin gel and its use |
| US7762329B1 (en) * | 2009-01-27 | 2010-07-27 | Halliburton Energy Services, Inc. | Methods for servicing well bores with hardenable resin compositions |
| 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 |
| CN102093880A (en) * | 2010-12-28 | 2011-06-15 | 中国石油大学(华东) | Water control agent for oil well and preparation method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103666429A (en) * | 2012-09-04 | 2014-03-26 | 中国石油天然气股份有限公司 | Surfactant mixed system for displacing oil from low-permeability oilfields |
| CN106589230A (en) * | 2015-10-20 | 2017-04-26 | 中国石油化工股份有限公司 | Water-swellable polymer microspheres and preparation method thereof |
| CN106589228A (en) * | 2015-10-20 | 2017-04-26 | 中国石油化工股份有限公司 | Low permeability reservoir flooding microemulsion system and preparation method thereof |
| CN106589228B (en) * | 2015-10-20 | 2020-11-03 | 中国石油化工股份有限公司 | Microemulsion system for profile control and flooding for low-permeability oil reservoir and preparation method |
| CN105400502A (en) * | 2015-11-06 | 2016-03-16 | 中石化石油工程技术服务有限公司 | High-pressure-bearing leakage blocking agent and preparation process thereof |
| CN105400502B (en) * | 2015-11-06 | 2019-01-18 | 中石化石油工程技术服务有限公司 | A kind of high pressurization sealing agent and its preparation process |
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Application publication date: 20120725 |