Abstract
In the Bohai Bay rift basin in eastern China, lacustrine turbidite sandstone is an important target for oil and gas production and development. However, this sandstone has complex sedimentary patterns and a limited reservoir distribution, leading to challenges in understanding and predicting targets. With seismic sedimentology, including the analysis of seismic attributes, stratigraphic slices and seismic facies, this paper establishes a prediction process suitable for thin sand bodies and subtle traps in the Chezhen Sag. Combined with 3D seismic data and wireline logging data, the planar distribution of sand bodies of the Shahejie Formation (P2S) in the Chezhen Sag is predicted. The evolution and distribution of P2S sand bodies in the Chezhen Sag are revealed by stratigraphic slice mapping on multiple sedimentary planes, and subtle traps in the lower submember of Member III of the Shahejie Formation (P2S3x) are characterized. The P2S3x results indicate three favorable trap areas, namely the Che 20 fan delta sand body, the Che 66 nearshore underwater fan sand body and the Che 241 shallow water delta sand body. These three lithologic subtle traps have great exploration potential, and new exploration wells should be deployed to target them.
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We thank National Science and Technology Major Project (2016ZX05027-001) of China for providing capital and logging, borehole and seismic data. Petrel software was provided by Sinopec Shengli Oilfield, China.
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Li, N., Zhang, J. & Luan, X. Predicting Thin Sand Beds and Subtle Lithologic Traps in the Shahejie Formation of the Chezhen Sag by Joint Investigation of Seismic Facies Using 3D Seismic Data. Arab J Sci Eng 47, 7407–7418 (2022). https://doi.org/10.1007/s13369-021-06542-2
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DOI: https://doi.org/10.1007/s13369-021-06542-2