CHARACTERISTICS AND ORIGIN OF THE SINIAN-PERMIAN FAULT SYSTEM AND ITS CONTROLS ON THE FORMATION OF PALEO-CARBONATE RESERVOIRS: A CASE STUDY FROM CENTRAL PALEO-UPLIFT, SICHUAN BASIN, CHINA

AbstractWe have evaluated the existence of good paleo-carbonate reservoirs in fault damage zones with a burial depth exceeding 5800 m in the Central Paleo-Uplift, Sichuan Basin, China. The relationships between fault system and sedimentation, and the formation of the paleo-carbonate reservoirs have been explored, which have long been ignored by previous studies due to the low-quality seismic data and the prevalent assumption of weak tectonic movement. Data from different sources such as newly acquired and processed seismic data, cores, and well-logs are used to study the characteristics and origin of the fault system and their controls on the formation of paleo-carbonate reservoirs. The main findings are as follows: (1) The Sinian-Permian fault system in the study area mainly comprises strike-slip faults with different scales plus a small number of locally developed collapse-related concentric faults. (2) The Sinian-Permian fault system, which usually has normal throw, mainly developed in an extensional s...

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