2006•Gaoxiao dizhi xuebaoRequires access
Sedimentary Facies and Oil-Gas Distribution Regularities of the Qingshankou Formation, Taikang Area, Songliao Basin
Zhang Zhi-li
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Abstract
The types of sedimentary facies and the sedimentary characteristics of the Qingshankou Formation in Taikang area of Songliao Basin are systematically analyzed, and the planar distribution of sedimentary facies and vertical evolution regularities in the 1 st Member and 2 nd-3 rd Members of the Qingshankou Formation are studied in detail. The results show that Qingshankou Formation is mainly composed of lacustrine and delta facies. The lacustrine facies includes 2 types of sedimentary subfacies and 4 types of sedimentary microfacies. Delta facies includes 2 types of sedimentary subfacies and 2 types of sedimentary microfacies. The analysis of sedimentary evolution shows that the characteristics of the 1 st Member of the Qingshankou Formation are sediments of deep and semi-deep lacustrine mudstone, but the characteristics of the 2 nd-3 rd Member of the Qingshankou Formation are sediments of shallow lacustrine and lacustrine delta mudstone and sandstone. There are mainly 3 types of sandstone-bodies reservoirs in Qingshankou Formation. They are mouth bar sandstone-body, distal bar sandstone-body and lacustrine sandstone-body in turn. The lacustrine sandstone-body is the best sandstone-body for oil. The lacustrine subfacies area, where the lacustrine sandstone-body develops, is the most potential area for exploring oil in the future.