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《Petroleum Geology & Oilfield Development in Daqing》 1991-02
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THEORETICALLY STUDY OF COIL ARRAY WITH METAL STANCHION IN ELECTROMAGNETIC LOGGING

Yang Yinzu Zhang Xi Chen Guohua (Research Institute of Geophysical.Daqing Logging Company ) Liu Mingxin (Scientific Research Institute of petroleum Exploration & Development, Beijing )  
ABSTRACT: The effect of coil array with metal stanchion on electromagnetic logging is studied theoretically.A numerical model is set and cadculation method is put forward.Calculation result shows that coil array with metal stanchion is feasible and the existence of metal stanchion has no influence on measured val-ues of commonly used phase differential and ratio of amplitude in electrmegnetic logging. A series of principals of designing coil array with metal stanchion is put forward.
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