| Author's Name: Tian Yu, Zhang Xingyang, Zhu Guowei, Zhang Hongwei, Wu Lei, Zhang Liangjie, Guo Tongcui, Yu Xiaowei, Yang Yu |
| Based on the imaging logging data, the Middle-Lower Jurassic Callovian-Oxfordian reef-bank sedimentary microfacies in carbonate platform margin slope are studied in the central part of Right Bank of Amu Darya, Turkmenistan. First, the cores and thin sections are used to calibrate the imaging logging, and seven sedimentary microfacies identified are classified into baffle reef, bond mound, high energy bioclastic bank, low energy bioclastic bank, low energy psammitic bank, inter reef (bank) and slope mud. Then, through the analysis of the imaging logging response characteristics for different sedimentary microfacies, some imaging logging facies models are established, which include bright spot, dark spot, low resistivity interlaced layers, low resistivity deformative layers, interbedded and massive facies. According to these facies models, the continuous logging facies of every single well are divided and the corresponding sedimentary microfacies are interpreted. Finally, the relationship between sedimentary microfacies and reservoir physical properties are analyzed. It is shown that fractured-porous reef-bank reservoirs are common in this area, and the sedimentary microfacies favorable for reservoir development are high energy bioclastic bank, low energy psammitic bank, baffle reef, low energy bioclastic bank and bond mound while the inter-reef (bank), and slope mud microfacies are not favorable for reservoir development for dense lithology. |
