发明名称 |
METHOD OF TREATING BOTTOM ZONES OF WELLS PRODUCING HEAVY AND DEAD OILS |
摘要 |
oil and gas production. SUBSTANCE: when treating bottom zones of wells with reduced oil recovery involving mudding with clay particles and asphaltene-tar-paraffin deposits, mixture of light pyrolysis tar (or light pyrolysis tar-based products) with alpha-olefins at volume ratio from 9:1 to 1:9 is used along with alkali solution containing 1-2% alkali component. Injection of hydrocarbon fluid and alkali solution and pulling out of dissolution and reaction products are effected under repressive-depressive wave conditions with frequency going from 1 to 400 Hz. EFFECT: increased permeability of treated formation region hindered by clayey and asphaltene- tar-paraffin deposits and thereby increased oil recovery. 2 tbl
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申请公布号 |
RU2162517(C1) |
申请公布日期 |
2001.01.27 |
申请号 |
RU19990111938 |
申请日期 |
1999.06.01 |
申请人 |
O-POVOLZH'JA (RNTTS VNIINEFT');REGIONAL NYJ N T TS URAL |
发明人 |
KHISAMOV R.S.;SULEJMANOV EH.I.;STARSHOV M.I.;ABDULKHAIROV R.M.;KHUSAINOVA A.A.;SITNIKOV N.N.;MALYKHIN V.I.;VOLKOV JU.V. |
分类号 |
E21B43/22;C09K8/524;C09K8/528;E21B37/06;(IPC1-7):E21B43/22 |
主分类号 |
E21B43/22 |
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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