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

In this paper based on previous research, S₃^上Ⅲ,â…£oil group is the study object. By the information comprehensive analysis such as passing geology , well logging , earthquake , producing a testing applies and so on ,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 28 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. 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.Sedimentary microfacies is the fundamental factors of control the reservoir heterogeneity at all levels,it plane spred and horizontal distribution of reservoir parameters have good correlation.Study on sedimentary mierofacies is base of reservoir heterogeneity research. sediment gradus,sand stone grading analysis,protogene sedimentary structure,ichnofossile and logging facies ete and palaeoenvironment background,we can concluse that reservoir has a strong plane, layer, the layer of non-homogeneous characteristics; Reservoir heterogeneity can divide macro heterogeneity and micro heterogeneity according to reservoir scale.Macro heterogeneity research based on sedimentology and studied on sandstone longitudinal and landseape orientation distributing mode,it's inner strueture character.Research section distributary channel sandstone is mostly positive rhythm,and high porosity and seepage rate in its central-top section,low seepage rate kalk interbed in its bottom.Underwater distributary channel sandstone is relatively homogeneous positive rhythm,high porosity and seepage rate in its bottom,its top low.Distributary mouth bar sandstone is complex rhythm,many interbeds inside.The study on haracteristics of reservoir heterogeneity is an important component of reservoir properties.with a comprehensive and systematic analyze on haracteristics of reservoir heterogeneity,analysis the main factors on the reservoir properties,and reach conclusions by overall features conducted the impact of reservoir heterogeneity to oil recovery and residual oil,and finally to guide oil exploration and development.