发明名称 |
PROCEDURE FOR SELECTIVE SHUTOFF OF WATER-ENCROACHED SECTIONS OF OIL RESERVOIR |
摘要 |
FIELD: oil and gas industry.SUBSTANCE: invention is related to oil producing industry, and namely to methods of water influx limitation in oil producers and alignment of injectivity profile in injectors. Procedure for selective shutoff of water-encroached sections of oil reservoir includes injection of gel-forming compound to the reservoir, flushing of the above compound to the reservoir and break in the process. At that 5-20 wt % of sodium metasilicate to the above compound and 3-9 wt % of chromic potassium alum as the initiator of gel-forming process and water up to the remaining volume. In 3-4 hours upon injection of water shutoff compound injection of alkali solution is performed in order to recover permeability of oil-saturated intervals. Then break in process is taken for 12-18 hours, thereafter operation of the well is started again.EFFECT: reduction in associated water production due to shutoff of producers or increase in oil recovery efficiency due to growth of sweep efficiency and connection of oil-saturated and low-permeable interlayers due to redistribution of injected water flows during treatment of injectors.1 ex, 1 tbl |
申请公布号 |
RU2536529(C1) |
申请公布日期 |
2014.12.27 |
申请号 |
RU20130156204 |
申请日期 |
2013.12.17 |
申请人 |
FEDERAL'NOE GOSUDARSTVENNOE BJUDZHETNOE OBRAZOVATEL'NOE UCHREZHDENIE VYSSHEGO PROFESSIONAL'NOGO OBRAZOVANIJA "NATSIONAL'NYJ MINERAL'NO-SYR'EVOJ UNIVERSITET "GORNYJ" |
发明人 |
DURJAGIN VIKTOR NIKOLAEVICH;STRIZHNEV KIRILL VLADIMIROVICH;EFIMOV PETR LEONIDOVICH;SHAGIAKHMETOV ARTEM MARATOVICH |
分类号 |
E21B33/138;C09K8/504 |
主分类号 |
E21B33/138 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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