CN101531890B - Preparation method of profile control agent for oil field deep temporary blocking - Google Patents
Preparation method of profile control agent for oil field deep temporary blocking Download PDFInfo
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- CN101531890B CN101531890B CN2009100821515A CN200910082151A CN101531890B CN 101531890 B CN101531890 B CN 101531890B CN 2009100821515 A CN2009100821515 A CN 2009100821515A CN 200910082151 A CN200910082151 A CN 200910082151A CN 101531890 B CN101531890 B CN 101531890B
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Abstract
The invention relates to a preparation method of a profile control agent for oil field deep temporary blocking, belonging to the technical field of petroleum exploration. Phenolic resin, organic chromium, glacial acetic acid, resorcinol and polyacrylamide are firstly weighed according to mass percentages, then the weighed polyacrylamide is slowly added in weighed water and stirred, and the weighted other retarding crosslinking agents are sequentially added and stirred. The profile control agent for the oil field deep temporary blocking prepared by the method has the advantages that the gelling time of the profile control agent is controllable during the use by adding different crosslinking agents, the gelling time is 8-48 hours; the gel strength is great, the gel is difficult to break, and the validity period is 1-2 years; the profile control agent can effectively change the water flow of injection water of a formation and have great absorption and blocking effects on the formation.
Description
Technical field
The present invention relates to a kind of preparation method who is used for the amendment of oil field deep temporary blocking, belong to technical field of petroleum extraction.
Background technology
Amendment is used to adjust the intake profile of water injection well, and deep profile controlling is meant that the radius of profile control is between 10-30m.
Cross the problem of early leaving in order to solve oil well, people do a lot of work in development plan and exploitation measure.Aspect development plan, adopted reasonable pattern shape; Aspect the exploitation measure, adopted the method for zonal injection.Yet, because the nonuniformity of stratal configuration still can not avoid injecting the inhomogeneous propelling of water along most permeable zone; In the process of mechanical dispensing,, or, still can cause oil well to cross the phenomenon of early leaving because of reasons such as cementing qualities because the not tight situation of separation takes place separation scraper.
For the oil field of most waterfloodings, because the nonuniformity of oil reservoir, it is the major cause of waterflood that injection water is advanced by leaps and bounds along the most permeable zone band.To water producer Ex post, though can reduce water content, validity period is short, and only individual well is benefited, and certainly will increase construction cost, and success ratio is not high, particularly the serious stratum of nonuniformity.
On water injection well, adopting zonal injection and separate zone stimulation low permeability layer is to make the waterline can more even propulsive important measures, but is not can both deal with problems better in all cases.Therefore, the method that water injection well is carried out selectively blocking off most permeable zone macropore is adjusted and is improved intake profile, it is the water injection well profile control, be that waterline is advanced more equably, prevent the too early water logging of oil well, reduce crude oil water containing, increase the area of water displacing oil, reduce the region of bypassed oil, improve the better method of reservoir recovery.
Summary of the invention
The objective of the invention is to propose a kind of preparation method who is used for the amendment of oil field deep temporary blocking,, improve the stratum and inject the water structure system, improve oilfield water flooding development efficiency to be used for oilfield stimulation operation (secondary oil recovery, tertiary oil recovery).
The preparation method of the amendment that is used for oil field deep temporary blocking that the present invention proposes may further comprise the steps:
(1) following each component is pressed following mass percent weighing:
Delayed cross-linking agent A: resol 1.5-3.33%
Delayed cross-linking agent B: organic chromium 0.125-0.3%
Delayed cross-linking agent C: Glacial acetic acid 0.27%
Delayed cross-linking agent D: Resorcinol 0.025-0.06%
Amphiprotic/amphoteric polymers: polyacrylamide 0.1-0.8%
Yu Weishui
(2) polyacrylamide of above-mentioned weighing is slowly joined in the water of weighing and stir the companion, after 30 minutes, the delayed cross-linking agent B and the delayed cross-linking D agent of above-mentioned weighing are added, and stirred the companion 10 minutes, add the delayed cross-linking agent A and the delayed cross-linking agent C of above-mentioned weighing at last.
The amendment that is used for oil field deep temporary blocking of the inventive method preparation, its advantage is: by adding different linking agents, amendment gelation time in use is controlled, and gelation time is 8-48 hour; Gelling strength is big, is difficult for broken glue, and validity period is 1-2; Can effectively change the flow direction of the water filling water on stratum; The stratum there are extraordinary absorption and ponding.
Embodiment
The preparation method of the amendment that is used for oil field deep temporary blocking that the present invention proposes may further comprise the steps:
(1) following each component is pressed following mass percent weighing:
Delayed cross-linking agent A: resol 1.5-3.33%
Delayed cross-linking agent B: organic chromium 0.125-0.3%
Delayed cross-linking agent C: Glacial acetic acid 0.27%
Delayed cross-linking agent D: Resorcinol 0.025-0.06%
Amphiprotic/amphoteric polymers: polyacrylamide 0.1-0.8%
Yu Weishui
(2) polyacrylamide of above-mentioned weighing is slowly joined in the water of weighing and stir the companion, after 30 minutes, the delayed cross-linking agent B and the delayed cross-linking D agent of above-mentioned weighing are added, and stirred the companion 10 minutes, add the delayed cross-linking agent A and the delayed cross-linking agent C of above-mentioned weighing at last.
The amendment that is used for oil field deep temporary blocking that the present invention proposes, the mechanism of its effect is based on the stratum selectivity of profile control liquid is entered theory, when profile control liquid is injected in the well, at first enter the most permeable zone on stratum, and generate frozen glue within the predetermined time, most permeable zone is produced plugging action, the rate of permeation of whole section oil reservoir is reached unanimity, the water filling trigger pressure of most permeable zone is improved, final change is injected the flowing law of water and is flowed to low permeability layer, thereby increase the swept volume that injects water, improve oilfield water flooding development efficiency.
Based on above-mentioned principle, the present invention has adopted a kind of delay cross linking profile modification system with amphiprotic/amphoteric polymers and linking agent and auxiliary agent composition, it injects into well with the low viscosity form, amendment advances along middle and high pervious course, linking agent slowly releases formaldehyde under suitable pH value and temperature condition, after reaching predetermined crosslinking time, crosslinked in layer crack away from pit shaft, and at oil reservoir deep formation tridimensional network, thereby reach darker profile control radius, shutoff most permeable zone and the water breakthrough of crack property, and keep higher water-injection capability and the effect of water injection well.
One embodiment of the present of invention are:
(1) following each component is pressed following mass percent weighing:
Delayed cross-linking agent A: resol 2.5%
Delayed cross-linking agent B: organic chromium 0.2%
Delayed cross-linking agent C: Glacial acetic acid 0.27%
Delayed cross-linking agent D: Resorcinol 0.04%
Amphiprotic/amphoteric polymers: polyacrylamide 0.5%
Yu Weishui
(2) polyacrylamide of above-mentioned weighing is slowly joined in the water of weighing and stir the companion, after 30 minutes, the delayed cross-linking agent B and the delayed cross-linking D agent of above-mentioned weighing are added, and stirred the companion 10 minutes, add the delayed cross-linking agent A and the delayed cross-linking agent C of above-mentioned weighing at last.
The experimental data that each component influences gelation time in the amendment of the present invention:
1, amphiprotic/amphoteric polymers (hereinafter to be referred as HPAM) is to the influence of gelation time:
HPAM is forming gel as host under the certain reaction condition under linking agent A, B acting in conjunction, gelation time difference under different concns, following table are gelation time under the different concns.
| Concentration (%) | 0.35 | 0.40 | 0.45 | 0.55 | 0.6 |
| Gelation time (h) | 14 | 12 | 10 | 8 | 7 |
| Gel-strength (Pa) | 6.5 | 7.6 | 8.5 | 10.1 | 11.8 |
As can be seen from the table: with the raising of HPAM concentration, gelation time shortens.
2, linking agent A is to the influence of blocking agent gelation time:
Linking agent A is the stronger resin of a class activity, at first reacts with crosslinking agent B, and crosslinked with the HPAM generation again, following table is the gelation time under the linking agent A different concns.
| Concentration (%) | 0.03 | 0.035 | 0.04 | 0.045 | 0.06 |
| Gelation time (h) | 12 | 10 | 8 | 7 | 6 |
| Gel-strength (Pa) | 7.3 | 9.6 | 11.8 | 12.1 | 12.8 |
As can be seen from the table: along with the increase gelation time of the concentration of linking agent A shortens, but when its concentration surpasses after 0.045%, the shortening amplitude is less, this is because the crosslinked control that is subjected to crosslinking agent B concentration takes place, when one timing of crosslinking agent B concentration, after linking agent A concentration increases to finite concentration, will be no longer to crosslinking reaction generation remarkably influenced.
3, crosslinking agent B is to the influence of the gelation time of amendment:
Crosslinking agent B is a kind of organic chromium class material, reacts with HPAM with linking agent A earlier again, and following table is the gelation time under the crosslinking agent B different concns.
| Concentration (%) | 0.12 | 0.13 | 0.14 | 0.15 | 0.16 |
| Gel-strength (Pa) | 7.9 | 8.8 | 9.6 | 10.5 | 11.2 |
| Gelation time (h) | 12 | 10 | 8 | 7 | 6 |
As can be seen from the table: along with the increase of crosslinking agent B concentration, gelation time shortens.
4, acidity is to the influence of amendment gelation time:
Adverse influence will take place to the concentration of HPAM in the speed of acidity major control linking agent and HPAM reaction, but when pH value is too low, and its pH value is controlled at more than 3.5.
| PH value | 7.5 | 7.0 | 6.0 | 5.5 | 4.5 | 4.0 | 2.5 |
| Gel-strength (Pa) | 10.6 | 11.2 | 11.6 | 11.8 | 10.6 |
| Gelation time (h) | Sluggish | Reaction is slow | 10 | 9 | 8 | 7 | 5 |
As can be seen from the table: pH value is when neutral, and reaction takes place slowly.Under acidic conditions with the reduction of pH value concentration, the gelation time shortening.But pH value is 2.5 o'clock.
5, temperature is to the influence of gelation time:
Because the activity of linking agent is subjected to Temperature Influence, and the linking agent reacting generating time is changed greatly, following table is an amendment gelation time under the differing temps:
| Temperature ℃ | 70 | 60 | 50 | 40 |
| Gelation time (h) | 8 | 16 | 30 | 60 |
| Gel-strength (Pa) | 10.9 | 11.3 | 115 | 11.2 |
As can be seen from the table: with the rising of temperature, gelation time shortens, and 10 ℃ of gelation times of the every decline of temperature prolong 1 times.In certain temperature range, temperature is little to the influence of gel-strength
The on-the-spot applicable elements of amendment of the present invention: formation temperature: 50-100 ℃, zone permeability: 50-3500 * 10-3um2, water salinity: salinity is not limit; Between the PH=5.0-7.5.
Preparing used each chemical agent of amendment of the present invention is:
1 amphiprotic/amphoteric polymers: be polyacrylamide, molecular weight is 1500-2000 ten thousand; It is gone into, and gelling strength is 20000-100000mPa.s behind the well; Manufacturer: oil limited-liability company of Beijing Dong Run section
2, delayed cross-linking agent A, B, C, D are produced by oil limited-liability company of Beijing Dong Run section, crosslinked A agent is the colourless liquid shape, be resol, crosslinked B agent organic chromium, crosslinked C agent major ingredient is a Glacial acetic acid, crosslinked D agent major ingredient is a Resorcinol, after four kinds of linking agents add the water mixing by certain proportioning, its main purpose is to allow polymkeric substance become the frozen glue body in the stratum, reaching the profile control radius is between the 10-30m, the effect on the big more shutoff of profile control radius stratum is good more, and it is just obvious more to improve flood effectiveness.
Claims (1)
1. preparation method who is used for the amendment of oil field deep temporary blocking is characterized in that this preparation method may further comprise the steps:
(1) following each component is pressed following mass percent weighing:
Delayed cross-linking agent A: resol 2.5%
Delayed cross-linking agent B: organic chromium 0.2%
Delayed cross-linking agent C: Glacial acetic acid 0.27%
Delayed cross-linking agent D: Resorcinol 0.04%
Amphiprotic/amphoteric polymers: polyacrylamide 0.5%
Yu Weishui
(2) polyacrylamide of above-mentioned weighing is slowly joined in the water of weighing and stir, after 30 minutes, the delayed cross-linking agent B and the delayed cross-linking D agent of above-mentioned weighing are added, and stirred the companion 10 minutes, add the delayed cross-linking agent A and the delayed cross-linking agent C of above-mentioned weighing at last.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100821515A CN101531890B (en) | 2009-04-17 | 2009-04-17 | Preparation method of profile control agent for oil field deep temporary blocking |
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| CN2009100821515A CN101531890B (en) | 2009-04-17 | 2009-04-17 | Preparation method of profile control agent for oil field deep temporary blocking |
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| CN101531890A CN101531890A (en) | 2009-09-16 |
| CN101531890B true CN101531890B (en) | 2011-10-19 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103666423B (en) * | 2013-12-04 | 2016-05-25 | 天津大港油田滨港集团博弘石油化工有限公司 | A kind of gel-type profile control agent that injects |
| CN103881671A (en) * | 2014-03-12 | 2014-06-25 | 中国石油天然气股份有限公司 | Composite gel type profile control agent for oil field water injection well and application thereof |
| CN104927815A (en) * | 2015-05-22 | 2015-09-23 | 中国石油化工股份有限公司 | Preparation method of supramolecular water plugging agent for improving water-intake profile of oil pool |
| CN106318359B (en) * | 2015-07-03 | 2019-10-18 | 中国石油化工股份有限公司 | A kind of oil displacement agent system |
| CN106351607A (en) * | 2016-11-17 | 2017-01-25 | 烟台智本知识产权运营管理有限公司 | Water shut-off and profile control method for oil-water well |
| CN106522880A (en) * | 2016-11-17 | 2017-03-22 | 烟台智本知识产权运营管理有限公司 | Controllable temporary plugging method applied during water plugging and profile control conducted through gel plugging agent |
| CN110591678A (en) * | 2019-10-14 | 2019-12-20 | 大庆市唯品科技开发有限公司 | Resin polyacrylamide gel 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 |
| CN115746808B (en) * | 2021-09-06 | 2024-04-30 | 中国石油天然气股份有限公司 | Plugging agent and application thereof |
| CN116218495B (en) * | 2021-12-06 | 2024-06-07 | 中国石油天然气股份有限公司 | Delay crosslinking type deep profile control agent and preparation method thereof |
| CN114437689B (en) * | 2022-01-21 | 2023-05-16 | 中海石油(中国)有限公司 | High-strength double-network micro-nano particle composite gel for plugging large pore channels of oil reservoirs and preparation method thereof |
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Effective date of registration: 20200623 Address after: 116600 Dagushan Industrial Zone, Dalian Economic and Technological Development Zone, Dalian City, Liaoning Province Patentee after: DALIAN TRICO CHEMICAL Co.,Ltd. Address before: 100084 1707A Executive Hotel, Wudaokou, Beijing, Haidian District Patentee before: BEIJING DONGRUNKE PETROLEUM TECHNOLOGY Co.,Ltd. |