| Citation: | SHI Jijian,FU Guang,DING Yunhao,et al. Delimiting the evolutionary stages of sealing properties of fault-zone fillings:Taking the F3 fault in K1d1 of Beier Depression as an example[J]. Bulletin of Geological Science and Technology,2026,45(1):15-24 doi: 10.19509/j.cnki.dzkq.tb20240302 |
The unreasonable classification of the evolutionary stages of the sealing ability of fault-zone fillings prevents a reasonable explanation of the variations in petroleum distribution in different parts of fault traps.
To address this problem, we propose a method that evaluates and tracks the closure index and cement index for both fault-zone fillings and underlying reservoir rocks, and then comprehensively delimits the evolutionary stages of fault sealing by comparing the relative values of the closure index and cement index between fault-zone fillings and underlying reservoir rocks.The method was applied to the F3 fault in K1
The results show that: The fault-zone fillings of the F3 fault in K1
Therefore, the proposed method for delimiting the evolutionary stages of fault-zone fillings material sealing ability is feasible, providing important insights for assessing the sealing ability and formation timing of fault traps and enhancing the efficiency of oil and gas exploration.
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