Abstract:This paper is designed to better meet the need of oil and gas exploration to gradually shift to subtle oil and gas reservoirs, such as structural-lithologic and lithologic reservoirs, and fully explore and utilize the rich geological information in seismic data. For this purpose, the paper relies on 3D seismic data and well data to investigate the Mesozoic oil-bearing and Paleozoic gas-bearing strata of the Huanqing Block, Ordos Basin. The structural interpretation method, attribute analysis method, reservoir seismic inversion method, and other technical methods in the GeoEast software are employed to determine the morphology of low-relief Jurassic structures and the palaeogeomorphology in the early sedimentation stage. In addition, the sand body distribution in the Triassic Chang-8 Member is finely characterized, and the favorable gas-bearing range in the Paleozoic He-8 Member is clarified. Finally, the characteristics of large-scale lithologic and structural-lithologic reservoirs are defined through hydrocarbon accumulation analysis. This paper provides technical support for the efficient exploration and economic benefit development of the Huanqing Block.
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