The Study On Reservoir Characteristics And Regularity Of Oil Distribution Of Yan9Member In Sha Gou Area

The paper is summairzed in many of predecessors’ achievements, and on the basis ofpetroleum geology, tectonic geology, sedimentary petrology, logging geology and relateddiscipline theory as the guide, the comprehensive utilization of the study area logging data,drilling material, oil test material*and the core analysis test data of study area, finished thesmall member division and correlation of yan9, sedimentary facies and sand distribution,reservoir characteristics and reservoir evaluation research, according to the reservoircharacteristics and the main controlling factors of the reservoir formation, and summarizedregularity of oil distirbution of yan9member in Sha Gou area and predicted, oil enrichareas.The results of the study show that the main reservoir rock types are debirs-feldsparsandstone and feldspar-debrissandstone, mainly is ifne particle size, and fairly well sorted, thepore type is mainly primary intergranular pore, followed is dissolution pore, the porestructure is the mid-pore mid-throat. Reservoir inner of layer and plain heterogeneous isstrong, interlayer heterogeneity is relatively weake. The mainly sedimentary facies is deltaplain, further can be divided into distributary channel and interdistributary bay*Reservoirclassification results show that major II class is given piroirty to yan91member, followedis Illclass, reservoir evaluation is better，major III class is given to yan92member, the oilreservoir type is mainly structure-iithologic reservoir and sandstone up-pointed out reservoir,Reservoir is dual controlled by sedimentary facies and reservoir structure. Based on thecharacteristics of oil reservoirs and the control factors analysis of oil enrichment, predicted,oil reservoirs enrich areas and showed that1areas belong to I class oil enrichment area,only2area belong to II class oil cnrichmcnt area,2areas is Illclass in yari91member; while，only1areas belong to II class oil enrichment area, only1area is Illclass in yan92member,the total predicted area is1.96Square kilometers.