Wang Y.,Northeast Petroleum University |
Wang Y.,State Key Laboratory Cultivation Base Jointly Constructed by Heilongjiang and the Ministry of Science and Technology |
Wang Y.,Science and Technology Innovation Team of Colleges and Universities in Heilongjiang |
Lu Y.,Northeast Petroleum University |
And 14 more authors.
Shiyou Diqiu Wuli Kantan/Oil Geophysical Prospecting | Year: 2014
Changling multiple fault depression groups are formed by many half grabens developed on the hanging walls of listric normal faults. They consist of fault depression in Da'an-Honggang, Qian'an, Gudian, Guxi, Fulongquan, Chaganhua, Qianshenzijing, Changling farm, and Xinanzhen. They experienced three evolution stages, the initial crack in Huoshiling group sedimentary period, the intensive rift in Shahezi group sedimentary period, and the rift shrink in Yincheng group. The fracture of formation, development, compound and superimposition of secondary fault depressions in different periods are under the control of active faults in each phase. Multiple fault depressions in Changling can be classified as 4 types of complex (tandem type, parallel type, inclined column type, and relative type) and 2 types of superimposition (inheritance type and non-inheritance type). The inheritance activities of the trunk boundary faults in Changling fault depressions caused fault depressions of various periods in the longitudinal, which controlled the development of high-quality hydrocarbon source rocks. The intersection of two or more boundary faults is a weak stress. It is also the volcanic eruption channel which controlled the development of volcanic strata. The trunk boundary faults in depression constitute gas conducting channels, and induce a large number of structural fractures. Meanwhile they improve the reservoir performance of volcanic reservoir further. Accommodation zones in the process of the compound control the development of sandbody of clastic reservoir. The inherited palaeohigh formed in the same period is the advantageous section of natural gas accumulation in deep multiple fault depression groups in Changling.