Structure Evolution of Qinjiatun-Qindong Fault System in Lishu Subbasin

Abstract:

Three-dimensional(3-D) seismic data and structure analysis of the Lishu subasin in Songliao basin indicates that Qinjiatun fault zone is composed of two faults: East-Qin and West-Qin fault. This fault system initially formed at Huoshiling stage, peaked at Shahezi stage and faded dramatically from Yingcheng stage. The Qinjiatun fault was important in controlling strata thickness and distribution of the Huoshiling formation. Qindong fault, a typical strike-slip fault, developed relatively later, cutting the Qinjiatun fault, The major active stage was in Denglouku-Quantou stage, and weakened in the end of late Cretaceous. Qinjiatun fault zone was reversed at Denglouku stage when the regional stress went compressive, generating a structure nose that was potentially beneficial for hydrocarbon to accumulate. The strike-slip Qindong fault became active relatively later, cutting through the previous strata and proving pathways for both accumulation and effusion of hydrocarbon.

• Periodical: Advanced Materials Research (Volumes 734-737)
• Pages: 170-177
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.734-737.170
• Online since: August 2013
• Authors: Shao Dong Qu, Chi Yang Liu, Li Jun Song, Hui Deng, Long Zhang, Guang Zhou Mao
• Keywords: Hydrocarbon Accumulation, Lishu Subbasin, Qinjiatun-Qindong Fault System, Seismic Prospecting, Strike-Slip Fault, Structural Evolution

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