Integrated Formation Pressure Testing by Logging and Genesis of Abnormal High Pressure in Gaoquan anticline

Abstract

Abstract: There are many formation pressure testing methods by logging at home and abroad, but most of them are based on the undercompaction theory and limited to a single lithology of formations. Especially for the deep piedmont structures in the margin of the basin, logging interpretation with a single parameter will lead to large errors in formation pressure determination, and cannot give an explanation about more abnormal pressure mechanisms other than sedimentary compaction mechanism. Therefore, the logging parameters related to various abnormal high pressure mechanisms are comprehensively interpreted, a multiparameter model and several testing methods suitable for complex piedmont structures are established for formation pressure testing by logging and the formation pressure profiles of Well Gaotan-1 in Gaoquan anticline in the southern margin of Junggar basin are evaluated in detail. The calculated results are in good agreement with the measured data and the relative error is less than 3.00%. Meanwhile, based on the mechanical relationship of the original sedimentary loading-unloading processes, the forming mechanism of the abnormal high pressure in the deep strata of Gaoquan anticline is determined by using the multiple logging parameter analysis method.

Key words: Junggar basin, Gaoquan anticline, piedmont structure, logging interpretation, formation pressure, abnormal high pressure

XU Xinniu, LI Yujing, RUAN Biao, CAO Guangfu, HUANG Hong, YANG Hu. Integrated Formation Pressure Testing by Logging and Genesis of Abnormal High Pressure in Gaoquan anticline[J]. Xinjiang Petroleum Geology, 2020, 41(zk(English)): 137-144.

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