Abstract：The analyses of measured porosity data，thin sections，casting thin sections and scanning electronic microscopes of the reservoirs indicate that three secondary porosity zones were vertically developed in the Cenozoic reservoirs of the southern segment of the western slope of the Liaohe Depression in the Bohaiwan Basin.As a result，the high quality reservoirs are developed in a generally low porosity and permeability background. Sedimentary microfacies and diagenesis are the main factors controlling the formation and distribution of the high quality reservoirs which were mainly developed as braided channel，mouth-bar and sheet-like sand microfacies. They belong to the early diagenetic stage B to intermediate diagenetic stage A1 and dissolution diagenetic facies were developed. The diagenetic stages and diagenetic facies distribution are predicted by simulating the paleotemperature，vitrinite reflectance，sterane isomerization rate and authigenetic quartz variation in space and time. The distribution of high quality reservoirs of Member 3 of Shahejie Formation is predicted by superimposing the diagenetic facies maps on the microfacies maps. The results show that the high-quality reservoirs of Member 3 of Shahejie Formation were developed in the middle part of the western slope.
Meng Yuanlin,Li Na,Huang Wenbiao et al. Diagenetic facies analysis and high quality reservoir prediction of the Cenozoic in southern segment of western slope of Liaohe Depression[J]. JOPC, 2008, 10(1): 33-41.
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