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Identification of Mid and Deep Gas Zone and Its Distribution features

, Wei,B.et al.,  
It is difficult to identify mid and deep gas zones with well-log information. A gas zone determination method is presented, which begins with enviromental and invasion correction utilizing difference crossplot of effective porosities and the ratio of apparent fluid time difference to apparent fluid density. On the basis of crossplot and ratio methods, the features of gas zone distribution in both horizontal and vertical direction by means of multiwell evaluation. New oil and gas bearing structures have been found.
【CateGory Index】: P618.130.2
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