CN104371692A - Deep coating composite gel modifying and flooding agent for oil recovery and preparation method of deep coating composite gel modifying and flooding agent - Google Patents

Deep coating composite gel modifying and flooding agent for oil recovery and preparation method of deep coating composite gel modifying and flooding agent Download PDF

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Publication number
CN104371692A
CN104371692A CN201410674346.XA CN201410674346A CN104371692A CN 104371692 A CN104371692 A CN 104371692A CN 201410674346 A CN201410674346 A CN 201410674346A CN 104371692 A CN104371692 A CN 104371692A
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China
Prior art keywords
oil recovery
agent
water
deep coating
coating composite
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Pending
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CN201410674346.XA
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Chinese (zh)
Inventor
胡玉国
梁海臣
李靖
张冠洲
张有强
张凤跃
肖劲松
孙红桃
李东
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TIANJIN DAGANG OILFIELD BINGANG GROUP BOHONG PETROLEUM CHEMICAL CO Ltd
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TIANJIN DAGANG OILFIELD BINGANG GROUP BOHONG PETROLEUM CHEMICAL CO Ltd
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Application filed by TIANJIN DAGANG OILFIELD BINGANG GROUP BOHONG PETROLEUM CHEMICAL CO Ltd filed Critical TIANJIN DAGANG OILFIELD BINGANG GROUP BOHONG PETROLEUM CHEMICAL CO Ltd
Priority to CN201410674346.XA priority Critical patent/CN104371692A/en
Publication of CN104371692A publication Critical patent/CN104371692A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/58Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
    • C09K8/588Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific polymers

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention provides a deep coating composite gel modifying and flooding agent for oil recovery, which is characterized by comprising the following components in percentage by weight: 0.5-5% of a composite polymer, 0.1-5% of a cross-linking agent, 0.05-2% of a pH regulator and the balance of water. A preparation method of the deep coating composite gel modifying and flooding agent for oil recovery comprises the following steps: dissolving the composite polymer in water, adding the cross-linking agent, mixing, heating to 65-80 DEG C, reacting for 40-60min, and adding the pH regulator to regulate pH to 4-7. The deep coating composite gel modifying and flooding agent for oil recovery, disclosed by the invention, is suitable for various environments; the preparation method is simple; the gel forming time is adjustable; the deep coating composite gel modifying and flooding agent has excellent injectivity, shearing resistance, heat stability and plugging performance, is suitable for modifying and flooding operation of an injection well, and has excellent application prospect in term of stabilizing oil production and controlling water cut for enhancing oil recovery in later development of a high water-cut oilfield.

Description

A kind of oil recovery uses deep coating plural gel adjusting driving agnet and preparation method thereof
Technical field
The present invention relates to petroleum industry auxiliary agent field, particularly relate to a kind of oil recovery deep coating plural gel adjusting driving agnet and preparation method thereof.
Background technology
Along with oil field enters the middle and high moisture development late stage stage, the difficulty of steady oil control water is increasing, and the efficiency of displacement how improved further in the volumetric conformance efficiency of injection water and water swept volume is one of petroleum industry key subjects urgently to be resolved hurrily.Owing to injecting the long-term souring of water, add the impact of oil reservoir sedimentary environment and nonuniformity, interlayer, horizontal contradiction are more and more outstanding, current predominant pathway is defined between oil and water well, low permeability layer is difficult to well be employed, make a large amount of surplus oil residual wherein, have a strong impact on the water flooding effectiveness of oil reservoir.Therefore, deep profile correction technology as one improve high water cut oil field development effectiveness, important technique measure that water and oil control realizes oil reservoir stable yields obtains and proposes and application.The various underground crosslinked system of adjusting driving agnet based on polyacrylamide of widespread use, it applying of it self shortcoming restriction, mainly Gelation Conditions is harsh, chocking-up degree is low, be not suitable for macropore and Fractured Reservoir, heatproof is below 90 DEG C, injected water salinity must not more than 50000mg/L, crosslinking time is slower, cross-linking system is migrated for a long time and is caused diffusion in formation pore, dilution, shear, degraded etc., thus cause the original cross-linking system just harsh at ground Gelation Conditions to be deteriorated in Gelling down hole situation, therefore, need exploitation one badly and be easy to preparation, gelation time is adjustable, be easy to enter earth formation deep, there is the adjusting driving agnet of good thermal stability energy.At present, the advantage that adjusting driving agnet is controlled with its gel time, the scope of application is wider of polymer weak gel class is widely used in oil field, and primarily of polymkeric substance and linking agent two portions composition, exist with the form of entirety, cross-linked state is mainly intermolecular cross-linking.Application of weak gel profile agent can reach the dual purpose of deep fluid changed course and the displacement of reservoir oil, the preferential path that Weak Gels has in certain intensity energy formation on the one hand produces certain plugging action, make follow-up injection water around to low permeability layer, play transfer drive effect, on the other hand, because cross-link intensity is not high, Weak Gels slowly can also move to earth formation deep the effect producing and be similar to polymer flooding in preferential path under the promotion of follow-up injection water, thus can expand swept volume to a greater extent and improve oil displacement efficiency.
Summary of the invention
The present invention wants technical solution problem to be the shortcoming of uncontrollable, high temperature resistant, the anti-salt weak effect of amendment gelation time of the prior art, provides a kind of oil recovery deep coating plural gel adjusting driving agnet and preparation method thereof, is suitable for the deep profile correction of all kinds of oil reservoir.
Technical scheme of the present invention is a kind of oil recovery deep coating plural gel adjusting driving agnet, it is characterized in that being prepared from by composition polymer, linking agent, pH adjusting agent, water; The weight percent of each component is: composition polymer 0.5 ~ 5%, linking agent 0.1 ~ 5%, pH adjusting agent 0.05 ~ 2%, excess water.
Described composition polymer is acrylamide, N-hydroxyethyl acrylamide multipolymer.
Described composition polymer is obtained by acrylamide, the 10:1 copolymerization in molar ratio of N-hydroxyethyl acrylamide.
Described linking agent is one or both in Tiorco 677 or phenolic crosslinkers.
In described linking agent, the mass ratio of Tiorco 677 and phenolic crosslinkers is 4:1 ~ 6:1.
Described pH adjusting agent is any one or two kinds in acetic acid, citric acid, formic acid.
Described phenolic crosslinkers is made up of urotropine and Resorcinol, and the mol ratio of urotropine and Resorcinol is 10:1.
A kind of oil recovery uses the preparation method of deep coating plural gel adjusting driving agnet: after composition polymer is water-soluble, add linking agent, mixing post-heating 65 ~ 80 degree, and reaction 40 ~ 60min adds pH adjusting agent and regulates pH to 4 ~ 7.
Beneficial effect of the present invention is: adjusting driving agnet disclosed by the invention is applicable to multiple environment, preparation method is easy, gelation time is adjustable, there is good injection, shear resistant, thermostability and sealing characteristics, be applicable to the deep profile correction operation process of Injection Well, have a good application prospect in high water cut oil field later development steady oil control water extraction height oil recovery factor.
Embodiment
By the following examples the present invention is specifically described.
Embodiment one:
By acrylamide and N-hydroxyethyl acrylamide, 10:1 is water-soluble after weighing in molar ratio, is heated to 90 DEG C, is polymerized, obtains compound copolymer under the initiation of Potassium Persulphate, filters and obtain after adding methyl alcohol; Urotropine and Resorcinol in molar ratio 10:1 add distilled water to obtain phenolic crosslinkers for subsequent use after accurately taking; After 1 part of composition polymer is dissolved in 98.4 parts of water, add 0.5 part of phenolic crosslinkers, mixing post-heating 65 ~ 80 degree, reaction 40 ~ 60min, adds 1 part of pH adjusting agent second acid for adjusting pH to 6, obtains adjusting driving agnet sample 1; Gelation time at 90 DEG C is 5 hours, and gel viscosity is 4200mPas, broken glue temperature 103 DEG C, and carry out shutoff, oil displacement experiment to the rock core that rate of permeation is 100 ~ 120mD, sealing ratiod is 90.1%, improves recovery ratio 2.9%.
Embodiment two:
By acrylamide and N-hydroxyethyl acrylamide, 10:1 is water-soluble after weighing in molar ratio, is heated to 90 DEG C, is polymerized, obtains compound copolymer under the initiation of Potassium Persulphate, filters and obtain after adding methyl alcohol; After 1 part of composition polymer is dissolved in 98.4 parts of water, add 0.5 part of Tiorco 677 linking agent, mixing post-heating 65 ~ 80 degree, reaction 40 ~ 60min, adds 1 part of pH adjusting agent second acid for adjusting pH to 6, obtains adjusting driving agnet sample 2; Gelation time at 90 DEG C is 4 hours, and gel viscosity is 5100mPas, broken glue temperature 110 DEG C, and carry out shutoff, oil displacement experiment to the rock core that rate of permeation is 100 ~ 120mD, sealing ratiod is 91.1%, improves recovery ratio 3.1%.
Embodiment three:
By acrylamide and N-hydroxyethyl acrylamide, 10:1 is water-soluble after weighing in molar ratio, is heated to 90 DEG C, is polymerized, obtains compound copolymer under the initiation of Potassium Persulphate, filters and obtain after adding methyl alcohol; Urotropine and Resorcinol in molar ratio 10:1 add distilled water to obtain phenolic crosslinkers for subsequent use after accurately taking; After 1 part of composition polymer is dissolved in 98.4 parts of water, add 0.5 part of multiple crosslinking agent, the mass ratio of Tiorco 677 and phenolic crosslinkers is 4:1, mixing post-heating 65 ~ 80 degree, reaction 40 ~ 60min, adds 1 part of pH adjusting agent second acid for adjusting pH to 6, obtains adjusting driving agnet sample 3; Gelation time at 90 DEG C is 6 hours, and gel viscosity is 5500mPas, broken glue temperature 150 DEG C, and carry out shutoff, oil displacement experiment to the rock core that rate of permeation is 100 ~ 120mD, sealing ratiod is 92.9%, improves recovery ratio 3.7%.
Above one embodiment of the present of invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.

Claims (8)

1. recover the oil with a deep coating plural gel adjusting driving agnet, it is characterized in that being prepared from by composition polymer, linking agent, pH adjusting agent, water; The weight percent of each component is: composition polymer 0.5 ~ 5%, linking agent 0.1 ~ 5%, pH adjusting agent 0.05 ~ 2%, excess water.
2. a kind of oil recovery deep according to claim 1 coating plural gel adjusting driving agnet, is characterized in that: described composition polymer is acrylamide, N-hydroxyethyl acrylamide multipolymer.
3. a kind of oil recovery deep according to claim 1 coating plural gel adjusting driving agnet, is characterized in that: described composition polymer is obtained by acrylamide, the 10:1 copolymerization in molar ratio of N-hydroxyethyl acrylamide.
4. a kind of oil recovery deep according to claim 1 coating plural gel adjusting driving agnet, is characterized in that: described linking agent is one or both in Tiorco 677 or phenolic crosslinkers.
5. a kind of oil recovery deep according to claim 1 coating plural gel adjusting driving agnet, is characterized in that: in described linking agent, the mass ratio of Tiorco 677 and phenolic crosslinkers is 4:1 ~ 6:1.
6. a kind of oil recovery deep according to claim 1 coating plural gel adjusting driving agnet, is characterized in that: described pH adjusting agent is any one or two kinds in acetic acid, citric acid, formic acid.
7. a kind of oil recovery deep according to claim 1 coating plural gel adjusting driving agnet, it is characterized in that: described phenolic crosslinkers is made up of urotropine and Resorcinol, the mol ratio of urotropine and Resorcinol is 10:1.
8. one kind is recovered the oil by the preparation method of deep coating plural gel adjusting driving agnet: after composition polymer is water-soluble, add linking agent, mixing post-heating 65 ~ 80 degree, and reaction 40 ~ 60min adds pH adjusting agent and regulates pH to 4 ~ 7.
CN201410674346.XA 2014-11-21 2014-11-21 Deep coating composite gel modifying and flooding agent for oil recovery and preparation method of deep coating composite gel modifying and flooding agent Pending CN104371692A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109385257A (en) * 2017-08-06 2019-02-26 大庆东油睿佳石油科技有限公司 A kind of double slug Compositional type profile control agents of low-permeability sandstone oil reservoir and its application method
CN110144200A (en) * 2019-06-14 2019-08-20 黑龙江益瑞化工有限公司 A kind of oilfield chemistry oil recovery copolymer elastic gel class profile control agent
CN111518531A (en) * 2020-05-15 2020-08-11 宁波锋成纳米科技有限公司 Composite cross-linking agent and preparation method thereof, and delayed cross-linking profile control agent and preparation method thereof
CN115305075A (en) * 2021-05-08 2022-11-08 中国石油天然气股份有限公司 Weak gel profile control and flooding agent for medium-temperature oil reservoir and preparation method thereof
CN115433311A (en) * 2022-08-23 2022-12-06 中国石油天然气集团有限公司 Working fluid for preventing drilling fluid from transmitting pressure to stratum pore and preparation method thereof
CN116426261A (en) * 2021-12-30 2023-07-14 中国石油天然气股份有限公司 Polymer thickener, preparation and application thereof
CN117285917A (en) * 2023-10-10 2023-12-26 北京麒瑞鸿基石油科技有限公司 Double-base cross-linked zwitterionic weak gel oil displacement system and preparation method thereof

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US5358051A (en) * 1993-10-22 1994-10-25 Halliburton Company Method of water control with hydroxy unsaturated carbonyls
CN1903974A (en) * 2005-07-26 2007-01-31 中国科学院理化技术研究所 Nano water-soluble microgel oil displacement material and preparation method thereof
CN1927895A (en) * 2005-09-09 2007-03-14 中国科学院理化技术研究所 Nano-micron water-soluble microgel oil displacement material and preparation method thereof
CN102399345A (en) * 2010-09-14 2012-04-04 中国科学院理化技术研究所 Preparation method of emulsion deep profile control and flooding agent containing gel microspheres with core-shell structures and emulsion deep profile control and flooding agent
US20140238702A1 (en) * 2013-02-22 2014-08-28 University Of Kansas Low ph crosslinking of polymers

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5358051A (en) * 1993-10-22 1994-10-25 Halliburton Company Method of water control with hydroxy unsaturated carbonyls
CN1903974A (en) * 2005-07-26 2007-01-31 中国科学院理化技术研究所 Nano water-soluble microgel oil displacement material and preparation method thereof
CN1927895A (en) * 2005-09-09 2007-03-14 中国科学院理化技术研究所 Nano-micron water-soluble microgel oil displacement material and preparation method thereof
CN102399345A (en) * 2010-09-14 2012-04-04 中国科学院理化技术研究所 Preparation method of emulsion deep profile control and flooding agent containing gel microspheres with core-shell structures and emulsion deep profile control and flooding agent
US20140238702A1 (en) * 2013-02-22 2014-08-28 University Of Kansas Low ph crosslinking of polymers

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109385257A (en) * 2017-08-06 2019-02-26 大庆东油睿佳石油科技有限公司 A kind of double slug Compositional type profile control agents of low-permeability sandstone oil reservoir and its application method
CN110144200A (en) * 2019-06-14 2019-08-20 黑龙江益瑞化工有限公司 A kind of oilfield chemistry oil recovery copolymer elastic gel class profile control agent
CN110144200B (en) * 2019-06-14 2020-07-03 黑龙江益瑞化工有限公司 Copolymer elastic gel profile control agent for oilfield chemical oil extraction
CN111518531A (en) * 2020-05-15 2020-08-11 宁波锋成纳米科技有限公司 Composite cross-linking agent and preparation method thereof, and delayed cross-linking profile control agent and preparation method thereof
CN115305075A (en) * 2021-05-08 2022-11-08 中国石油天然气股份有限公司 Weak gel profile control and flooding agent for medium-temperature oil reservoir and preparation method thereof
CN116426261A (en) * 2021-12-30 2023-07-14 中国石油天然气股份有限公司 Polymer thickener, preparation and application thereof
CN115433311A (en) * 2022-08-23 2022-12-06 中国石油天然气集团有限公司 Working fluid for preventing drilling fluid from transmitting pressure to stratum pore and preparation method thereof
CN115433311B (en) * 2022-08-23 2024-04-26 中国石油天然气集团有限公司 Working fluid for blocking drilling fluid from transmitting pressure to stratum hole seam and preparation method thereof
CN117285917A (en) * 2023-10-10 2023-12-26 北京麒瑞鸿基石油科技有限公司 Double-base cross-linked zwitterionic weak gel oil displacement system and preparation method thereof

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