Influence of Tectonic Activity on Reservoir Formation in the Bozhong34 Block
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摘要

    

///In this paper, based on the interpretation of structure through seismic data as well as geological data, we discuss the evolution processes of tectonic activities and their influence on the petroleum accumulation. The results show as follows: 1) the depocenter dominated by tectonic activity controls the distribution of source rocks in the member 3 of Shahejie Group, lower segment of Dongying Group and lower segment of Minghuazhen Group; 2) during a slow chasmic period to a quick depression period of Kongdian Group, a depression period of member 1 to 2 Shahejie Group; 3) both anticlines formed by compression-torsion and drag structures done by tension-torsion are favorable of the formation of structure trap; 4) there is a good match between hydrocarbon generation-expulsion period and Neogene fault activity; 5) faults with EW strike formed at late tectonic movement cut the early faults with NE strike and form the fault network; and 6) there are two patterns of petroleum filling, one is that the petroleum migrates vertically through major faults which cut through source beds or “transfer station”; the other is that petroleum migrates step by step along secondary faults and sands.

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