
High-precision reservoir prediction technology and application of superdeep fault-controlled fracture-cave type in Shunbei, Tarim Basin
LaiYuan WANG, Jun LIU, Wei GONG, XuQiang BU, Cheng HUANG, HongYan LI
Prog Geophy ›› 2025, Vol. 40 ›› Issue (1) : 199-207.
High-precision reservoir prediction technology and application of superdeep fault-controlled fracture-cave type in Shunbei, Tarim Basin
Influenced by the style of strike-slip fracture and the coupling relationship of fracture-reservoir-collection, the carbonate ultra-deep fracture-controlled reservoirs have strong non-homogeneity in the same zone, and the planar variability of different zones is large. The drilling wells reveal that the fracture-controlled reservoirs are mainly dominated by caves and cracks. The fracture-controlled scale reservoirs are mainly developed in the strong energy anomaly zone near the fracture plane. Therefore, based on the analysis of the difference in seismic response of fractures such as pulling section, translational section, and extrusion section, and the advantageous attribute preference of the drilled wells, we conclude the comprehensive attribute portrayal techniques for different types of ultra-deep fracture-controlled reservoirs in the Shunbei area. Pull segment optimization significantly improves coherence properties. Coherent energy gradient properties are preferably utilized in the translation and extrusion sections. The impedance properties of internal cavernous reservoirs are meticulously analyzed through the employment of phase-controlled inversion. In turn, the drilling trajectory is guided according to the differences in fracture characteristics, specifically: the width of fracture zones in the pulling section and extrusion section is large, and the reservoirs are mostly pore-type, so it is recommended to design horizontal wells, while the translational section is dominated by fractured reservoirs, so it is mostly recommended to design small-angle well trajectories. Overall, this study is based on the fine delineation of the spatial distribution law of ultra-deep fracture-controlled reservoirs, the use of drilled wells, the preferred seismic attributes, and according to the characteristics of the fracture itself, a comprehensive guide to predicting the drilling trajectories.
Strike-slip fault / Fault-control reservoir / Reservoir prediction / Drilling trajectory design / Shunbei oilfield
Bo L, Zhang G, Yang F, et al. 2023. Identification of the ultra-deep fault-controlled karst-fracture-cavity carbonate reservoir and its application in Tarim Basin. //Proceedings of the 84th EAGE Annual Conference & Exhibition. Vienna: European Association of Geoscientists & Engineers, 1-5.
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感谢审稿专家提出的修改意见和编辑部的大力支持!
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