Research On Chang Two Reservoir Characteristics Of Ma Liangou-Da Donggou Area

Geologieal reserves of oil and natural gas is reserves in the ground,and it is a comprehensive reflection of oil and gas exploration and development. Reserves of oil and gas provides the important basis for exploration,development and investment scale of oil and gas field.Zhi Luo oilfield of Shaanxi Yanchang Petroleum(Group)Co.Ltd is located in east of the Shanbei slope of Eerduos Basin. It’s a concentration region of Oil and gas in Mesozoic Erathem of ordos basin.Ma Liangou-Da Donggou area is located in the middle of Zhi Luo oilfield about30km of Zhang Jiawan Town North.Structure is located southeast of the Shanbei slope. Drilling found the main oil layer section is chang Two. Reservoir is delta front subfacies distributary channel sand and river mouth bar Sedimentary sand body, Lithology is mainly feldspar sandstone. Overall properties is poor.Mainly medium porosity-low permeability and extra-low permeability reservoir.In this paper,based on Ma Liangou-Da Donggou area,the rearch is guided by the theory and methodology of sedimentary, petrology, petroleum geology, geophysics, lithofacies paleographic and other subjects and combines previous studies as well as the core material, logging data,analysis and test material.Through the geological research of Ma Liangou-Da Donggou area,we make clear the types of sedimentary facies and exhibition cloth,reservoir characteristics and its types,oil and gas distribution; through detailed interpretation of logging data, determine four property relations of reservoir, effective porosity and oil saturation logging interpretation model and net pay cut-off thickness; finally, based on the previous accounts, research reserves parameters and calculate geological reserves and recovery with the method of volume for Ma Liangou-Da Donggou area.The rearch provides the basis for setting reasonable oil field development scheme in Ma Liangou-Da Donggou area.