| 2.5维井间电磁反演在中国东部孤岛油田的应用 |
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| 引用本文： | 沈金松,孙文博,赵文杰,曾文冲.2.5维井间电磁反演在中国东部孤岛油田的应用[J].应用地球物理,2008,5(3):159-169. |
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| 作者姓名： | 沈金松 孙文博 赵文杰 曾文冲 |
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| 作者单位： | [1]Geophysical Department, Faculty of Resources and Informatics, China University of Petroleum （Beijing）, Beijing 102249, China [2]State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum （Beijing）, Beijing 102249, China [3]SINOPEC Shengli Oilfield Well Logging Company, Dongying, 257001, China |
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| 摘 要： | In this study, we present a practical technique of transforming cross-hole EM data into the inter-well resistivity distribution. The a priori information constraint is incorporated into an iterative regularized inversion procedure and a variable roughness is added into the inversion process. Finite element approximation based on a two and a half-dimensional （2.5D） model has been developed for the forward problem and the ＂pseudo-forward＂ problem needed for constructing the sensitivity matrix and synthetic data set. The regularized least-squares inversion scheme, constrained with the a priori information obtained from well logs, was adopted to reconstruct the inter-well resistivity profile from two synthetic electromagnetic data sets and field data acquired in the Gudao Oil Field, East China. The partial derivatives of the sensitivity matrix were computed by the adjoint equation based on the reciprocity principle. Inversion results of the synthetic and field data examples suggest that our method is robust and stable in the presence of random noise in the field data and can be used for cross-hole EM field data interpretation.
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| 关 键 词： | 电磁反演 石油工业 有限元方法 地下地质结构 |
Application of 2.5D cross-hole electromagnetic inversion in Gudao Oil Field, East China |
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| Jinsong Shen,Wenbo Sun,Wenjie Zhao,Wenchong Zeng.Application of 2.5D cross-hole electromagnetic inversion in Gudao Oil Field, East China[J].Applied Geophysics,2008,5(3):159-169. |
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| Authors: | Jinsong Shen Wenbo Sun Wenjie Zhao Wenchong Zeng |
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| Institution: | (1) Geophysical Department, Faculty of Resources and Informatics, China University of Petroleum (Beijing), Beijing, 102249, China;(2) State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum (Beijing), Beijing, 102249, China;(3) SINOPEC Shengli Oilfield Well Logging Company, Dongying, 257001, China |
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| Abstract: | In this study,we present a practical technique of transforming cross-hole EM data into the inter-well resistivity distribution.The a priori information constraint is incorporated into an iterative regularized inversion procedure and a variable roughness is added into the inversion process.Finite element approximation based on a two and a half-dimensional (2.5D)model has been developed for the forward problem and the"pseudo-forward"problem needed for constructing the sensitivity matrix and synthetic data set.The regularized least-squares inversion scheme,constrained with the a priori information obtained from well logs,was adopted to reconstruct the inter-well resistivity profile from two synthetic electromagnetic data sets and field data acquired in the Gudao Oil Field,East China.The partial derivatives of the sensitivity matrix were computed by the adjoint equation based on the reciprocity principle.Inversion results of the synthetic and field data examples suggest that our method is robust and stable in the presence of random noise in the field data and can be used for cross-hole EM field data interpretation. |
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| Keywords: | Cross-hole EM measurelnent Regularized inversion Finite element method Gudao oil field |
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