Organization
College of Geosciences, Yangtze University, Wuhan 430100, China
Shixi Oilfield Operation District, Xinjiang Oilfield Company, PetroChina, Karamay 834000, China
Research Institute of Exploration and Development, Huabei Oilfield Company, PetroChina, Renqiu 062550, China
School of Resources and Information, China University of Petroleum, Beijing 102249, China
Abstract
one of the key factors affecting the development effect of remaining oil under the condition of dense well pattern in old oilfields is the description accuracy of inter well reservoir. Based on the pre-stack seismic amplitude preserving and denoising, the application technology of AVO three-parameter (density, bulk modulus and shear modulus) seismic inversion for reservoir prediction is studied in the east block of North Block 1 of Saertu Oilfield. Taking sandstone group as a unit, the approximate relationship between elastic parameters and reservoir function is established to realize fine prediction of sandstone thickness, porosity and oil saturation. After well test, the coincidence rate of AVO three-parameter inversion for sand bodies over two meters is 77.5%, and those of porosity and oil saturation are 75.0% and 70.5%, respectively. It successfully guides the preparation of the remaining oil potential tapping plan of two wells in B1-Y1 well block.
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