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Description and prediction of carbonate fracture-cave reservoirs based on multi-attribute fusion
Jun LIU, GuangXiao DENG, Huan WEN, Wei GONG, Zhen WANG, HaiLong MA, GaoSong HAN, Jie LI
Prog Geophy ›› 2026, Vol. 41 ›› Issue (3) : 1111-1121.
PDF(5356 KB)
PDF(5356 KB)
Description and prediction of carbonate fracture-cave reservoirs based on multi-attribute fusion
Carbonate reservoirs exhibit strong heterogeneity, with their primary reservoir types being fracture-cave reservoir bodies controlled by strike-slip faults. However, the fine characterization of such reservoir bodies remains a challenging issue at present. To address this challenge, the following approaches are adopted.Firstly, considering that conventional post-stack seismic attributes possess strong capabilities in identifying fracture development zones composed of numerous fractures or large faults, the Likelihood attribute and the ant-tracking attribute are preferred for identifying fault-fracture bodies.Secondly, based on the analysis of seismic response characteristics of fracture-cave reservoir bodies, karst cave bodies exhibit distinct features on seismic profiles. A model-regularized post-stack impedance inversion method is employed, and the residual impedance attribute is utilized to characterize the development characteristics of karst cave bodies. This method can ensure the sparsity of inversion results while improving their lateral continuity.Finally, a multi-attribute fusion technique is applied to integrate the Likelihood attribute, ant-tracking attribute, and residual impedance attribute into a new attribute-the fracture-fault-cave body attribute. This attribute can delineate the spatial association between faults and fracture-cave reservoir bodies, facilitating the characterization and prediction of carbonate fracture-cave reservoirs.Practical application examples demonstrate that this attribute can effectively characterize the relationships between fault systems and cave/vuggy reservoirs.
Fracture-cave reservoir / Karst cave / Residual impedance / Multi-attribute fusion technique / Fracture-fault-cave body attribute
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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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