Delicate Study Of Reservoir Of Es₂ Of Z45-1 Fault-Block In Zhuangxi Oil Field

According to the datum of core, logging, seismic, and other analysis, the 2nd member of Shahejie formation of Z45-1 fault-block in Zhangxi Oil Field can be classified into seven rhythmic units(single sandbeds) after classification and correlation. The region is mainly nearshore subaqueous fans and bars, and the fan can be divided into inner fan, middle fan, and outer fan. And the middle fan which is the main part can be divided into braided channel microfacies, intrachannel microfacies, and the front of mid-fan microfacies; the bar can be divided into the margin of the bar, the center of the bar. The difference of lithology, thickness, distributed range, configuration, reservoir petrophysics and pore-structure among every formation is large, so the reservoir heterogeneity is strong, and the single sandbeds of S21,S22 and S23 are the main petroleum reservoirs by the integrative evaluation of reservoir. On the foundation of core analysis, taking FZI as characteristic parameter, cutting into slices, and using the thesis of fluid unit, the fluid unit of the reservoir can be divided into four types: poor, middle, good, excellent, in different places. The results can be used to determine the remaining oil and regulate the exploiting plan.