Research On Reserves Evaluation And Reservoir Characteristics Of Chuan Dao Area In Xia Siwan Oilfield

TangJiahe area of YongNing oil production plant is located in the middle of theShanbei slope of Eerduos Basin. It’s a concentration region of Oil and gas in Mesozoics ofordos basin. Drilling found the main oil layer section is chang6and the oil layer isfocused on chang63, The rock types of the reservoir consists fine grained sandstone，Chang6reservoir belongs to the low porosity,super-low permeability reservoir.The geological research in this paper include stratigraphic fine division andcorrelation, depositional microfacies, secondary interpretation of logging curves, reservoirdelicate description and Comprehensive evaluation and other approaches. According to thetheory of modern sequence stratigraphy, Chang6member was studied on the division andcontrast of high discernible formation sequence. Consequently,formation sequence andreservoir subdivision framework were established accurately,genesis types andsedimentary micro-facie distribution of sandbody units were indicated. The paper dissertedin detail petrological characteristics and spatial structure of the reservoir.The reservoirheterogeneity was also meticulously researched based on the detailed explanation ofreservoir parameters. A three-dimensional geological model which include Sedimentarymicrofacies, porosity, permeability,oil saturation and other properties for the Chang6reservior is established under limited condation of depositional facies and geologicalcharateristics,via geostatistics and stochastic simulation by using the Petrel geologicalmodel software. Reservoir geological model can not only profoundly petrophysicalproperties, spatial heterogeneity, and reservoir numerical simulation for the motion law ofoil and water laid an important foundation.