发明名称 |
METHOD OF DISSOLVING ORGANIC FILTER CAKE OBTAINED IN DRILLING AND COMPLETION OF OIL AND GAS WELLS |
摘要 |
The invention shows a method of degrading damaging material within a subterranean formation of a well bore using an enzyme treatment. Filter cakes and very viscous fluids are such damaging materials. The enzyme treatment degrades polysaccharide-containing filter cakes and damaging fluids which reduces their viscosity. The degraded filter cake and damaging fluid can then be removed from the formation back to the well surface. The particular enzymes utilized are specific to a particular type of polysaccharide and are active at low to moderate temperatures. The enzymes attack only specific linkages in filter cakes and damaging fluids and are active in the pH range of about 2.0 to 10.0. |
申请公布号 |
WO9401654(A1) |
申请公布日期 |
1994.01.20 |
申请号 |
WO1993US06113 |
申请日期 |
1993.07.01 |
申请人 |
BJ SERVICES COMPANY |
发明人 |
TJON-JOE-PIN, ROBERT, M.;BRANNON, HAROLD, D.;RICKARDS, ALLAN, R. |
分类号 |
C09K8/512;C09K8/514;C09K8/52;C09K8/62;C09K8/68;C09K8/90;(IPC1-7):E21B37/08;E21B43/25 |
主分类号 |
C09K8/512 |
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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