Reservoir Evaluation Of Es₃ Member In Linxi Area, Huimin Sag

Abundant sand bodies developed in the period of Es₃ member in Linxi area locating at the west of Huimin Sag. These sand bodies have good conditons for hydrocarbon reservoir forming, and have been becoming the important zones of interest for reserve and production improving.Following the exploration orientation of Shengli Oil Field, in view of practical problems restricting the exploraion of research area, basis on large numbers of such data as core analysis, mud logging, well logging and seismic, this dissertation deeply studied the macroscopical throughgoing characteristics and microcosmic characteristics of Es₃ reservoir in Linxi area, detailedly analyzed the sedimentary microfacies, diagenesis, the control action of sedimentary resource to petrophysics, and pointed out the favorable exploration direction. Delta frontal sand body and turbidite sand body mainly developed in Es₃ upper member. The petrophysis are influenced by sedimentary microfacies in macroscopical and influenced by the types and contents of authigenic clay minerals in microcosmic. The structure - lithology trap and lithologic trap mainly develop in the area from Yingzijix fault to Daluhu. In Es₃ medial member, the main reservoir type is underwater distributary channel, channel mouth bar is not developed here, petrophysics are mainly affected by diagenesis, the structure development area surrounding sag center benefit exploration area. In Es₃ lower member, the types of sandstone are mainly beach - bar sand of shore-shallow lacustrine, the petrophsics is very good, the exploration emphases lie on the fluting outstretching to sag and holding between Tangnan nosing structure and Xinglongshi nosing structure and the belt between line well Xia 72– well Xiaxie 701 and sag center. The area with beneficial structure has good exploration foreground.