发明名称 |
Low temperature inductive heating of subsurface formations |
摘要 |
<p>Electrical current flow is induced in a ferromagnetic conductor providing time-varying electrical current at a first frequency to an electrical conductor located in a formation. The ferromagnetic conductor at least partially surrounds and at least partially extends lengthwise around the electrical conductor. The ferromagnetic conductor resistively heats up to a first temperature of at most about 300° C. Water in the formation is vaporized with heat at the first temperature. Subsequently, time-varying electrical current at a second frequency is provided to the elongated electrical conductor to induce electrical current flow at the second frequency such that the ferromagnetic conductor resistively heats up to a second temperature above about 300° C. Heat transfers from the ferromagnetic conductor at the second temperature to at least a part of the formation to mobilize at least some hydrocarbons in the part of the formation.</p> |
申请公布号 |
AU2011237622(B2) |
申请公布日期 |
2015.01.22 |
申请号 |
AU20110237622 |
申请日期 |
2011.04.07 |
申请人 |
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V. |
发明人 |
FOWLER, THOMAS DAVID;NGUYEN, SCOTT VINH |
分类号 |
E21B36/04 |
主分类号 |
E21B36/04 |
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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