Research On The Clastic Reservoir Characteristics Of Oulituozi Oilfield In The Liaohe Fault Depression

The article is theoretically based on high-resolution sequence stratigraphy, reservoir geology, reservoir sedimentology, reservoir well logging geology, exploration geology and exploration seismology etc. On the basis of logging data, combined with seismic, logging and core data, the paper applied both rich dynamic and static data which provided by later stage of exploitation as well as sedimentary process analysis, well logging analysis method on the sedimentary unit subdivision and comparison, reservoir sedimentary and reservoir heterogeneity charaterization of delimitation sand channel bar of middle of the East fault depression of The liaohe fault depression. S3 interval was established the unifying high-resolution sequence formation grid and 25 time-formation unit were classified. Within time-formation unit, the study for sedimentary pattern of regional fan-delta was determined through phase identification and log facies study. Detailed analysis and study were carried on inner part of sedimentary system of regional fan-delta. Seven kinds of logging microfacies pattern were summarized. Through using of sequence analysis, the paper point out that sequence formation in the studied zone was controlled by structural factors, ascending and descending movement of base level further impose influence on seismology; Through intensive study for both macrocosmis and microcosmic features of reservoir, the paper Fig.d out that reservoir has the characteristic of heterogeneous property within interlayer, plane and in situ; Through comprehensive and systemic characterization of the reservoir, the made a reservoir evaluation which classifying reservoir of better,medium and poor, The oil-bearing sand is mainly in medium reservoir, and prediction in sand groups were worked out so as to provide optimization basis for further exploitation strategy.