Study on oil and gas enrichment rule of Shahejie Formation in Qijia-Yuanyanggou area
In viewof the problem that the relation between oil and water is complicated in oil and gas exploration, by dissecting oil and gas reservoirs and analyzing the matching relationship between oil and gas distribution and reservoir forming conditions, this paper studied the oil and gas enrichment rule and its controlling factors of Shahejie Formation in Qijia-Yuanyanggou area. The result shows that hydrocarbon mainly distributed in Sha 2 member in profile and step Ⅲ in plane, and most of the reservoirs are fault-lithologic reservoirs. The enrichment of oil and gas is mainly controlled by the development of sand reservoir and traps, lateral sealing of faults and fault activity during late period. The enrichment of oil and gas in different layers has different controlling factors. The nondevelopment of traps of Sha 2, submember 1 of Sha 3 and Sha 4 member is the main cause for failure wells, while the nondevelopment of sand reservoir of sub-member 2 and sub-member 3 of Sha 3 member is the main reason for failure wells.
YAN Bo , LV Xiaohui . Study on oil and gas enrichment rule of Shahejie Formation in Qijia-Yuanyanggou area[J]. Lithologic Reservoirs, 2011 , 23(6) : 1 -5 . DOI: 10.3969/j.issn.1673-8926.2011.06.001
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