| Many gas reservoirs were found at Liuquan and Bieguzhuang structure in Langgu depression by review of aged wells and fine geological research. It indicates that it is necessary to reinforce the methods of interpretation of log and the criterion of identification for oil and gas formation in addition. In this paper the relationships between oil or gas distribution and structure character, deposition character of Shahejie group and formation character, type of water in reservoir are discussed in detail. The reason of low resistance oil or gas formation is analyzed. Applying multi analysis technology, the criterion of interpretation of log suitable for Langgu depression is established based on the available information and the relationship between log response and formation character. |
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