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| Application of adaptive higher-order vector finite element .method to simulate resistivity logging-while-drilling tool response |
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LIU De-jun1,MA Zhong-hua2,YUAN He3,AN Tao4
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(1. College of Geophysics and Information Engineering in China University of Petroleum, Beijing 102249, China;2. Faculty of Mechanical and Oil-Gas Storage and Transportation Engineering in China University of Petroleum,Beijing 102249, China;3. Petroleum Machinery Factory of Bokai Petroleum Equipment Mant^acturing Company Limited, Renqiu 062552, China;4. CNPC Engineering Technology Company, Beijing 100007，China)
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| Abstract: |
| An adaptive higher-order vector finite element method was used to simulate different models of instrument response. The main influence factors on resistivity responses including borehole, source distance, the distance between the receiving coil, the distance between coil and fonnation, the emitting coil length and other factors were analyzed. The numerical simulation results show that increasing the source distance, reducing the distance between the receiving coils or the distance between receiving coils and formation help to enhance the resolution ability of the instrument. The smaller borehole diameter is more helpful to obtain the real logging responses. Compared with the conventional adaptive h method，the new method has high accuracy, high speed of solving and the convergence of error exponent rate. |
| Key words: resistivity logging-while-drilling adaptive method higher-order vector finite element method exponential convergence numerical simulation |
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