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91. 发明申请

US20110247819A1 LOW TEMPERATURE INDUCTIVE HEATING OF SUBSURFACE FORMATIONS 有权
标题翻译：低温感应加热的表面形态
公开(公告)号：US20110247819A1
公开(公告)日：2011-10-13
申请号：US13083240
申请日：2011-04-08
申请人： Scott Vinh Nguyen , Thomas David Fowler
发明人： Scott Vinh Nguyen , Thomas David Fowler
IPC分类号： E21B43/24 , E21B36/04
CPC分类号： E21B43/24 , E21B43/2408
摘要： 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.
摘要翻译：在铁磁导体中感应出电流，该铁磁导体以第一频率向位于地层中的电导体提供时变电流。铁磁导体至少部分地围绕电导体围绕并至少部分地延伸。铁磁导体电阻加热到最多约300℃的第一温度。地层中的水在第一温度下被加热蒸发。随后，将第二频率的时变电流提供给细长电导体以在第二频率处引起电流流动，使得铁磁性导体电阻加热至高于约300℃的第二温度。从铁磁体导体在第二温度下至至少一部分地层，以在地层的一部分中调动至少一些烃。

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