1. Institute of Exploration and Development, Changqing Oilfield Company, PetroChina, Xian, Shaanxi 710021, China; 2. National Engineering Laboratory for Low-permabilitt Oil and Gas Exploration and Development, Xian, Shaanxi 710021, China
Abstract：The Heshui area, Ordos Basin is a hotspot of the hydrocarbon exploration in recent years. There are quite a few oil-bearing strata in the area such as Chang 3, Triassic Yanchang Formation, Chang 6 and Chang 8, Jurassic lithologic structural reservoirs. However Jurassic reservoirs have small sizes and a unclear distribution pattern, and lithologic structural reservoirs are characterized by thin thickness, lateral rough variation, and large difference of oil-bearing abundance. To overcome these difficulties, we conduct reservoir prediction with seismic interpretation tools provided by GeoEastsuch as varying-velocity structure mapping, constraint neural network, fluide activity, etc. Finally sand thickness, oil-bearing strata, and structure pattern in the area are accurately characterized.
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