Modified continuous random patchy-saturation model in tight gas detection
Wei Xian1,2, Yang Zhifang1, Yan Xinfei1, Lu Minghui1, Li Xiaoming1, Ren Yan1
1. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China; 2. Beijing Vocational College of Labour and Social Security, Beijing 100083, China
Abstract：The heterogeneous distribution of gas and water in tight-sand gas reservoirs may cause complex relationships between elastic and reservoir parameters,which results in strong uncertainty in the quantitative seismic interpretation.According to characteristics of complex fluid distribution in tight-sand gas reservoirs,we modify the continuous random patchy-saturation model.This modified model can well investigate the influence of petrophysical properties and pore fluids on wave responses.A multi-scale rock physical template is established based on the modified model,and is calibrated by seismic-,logging-,and ultrasonic-scale data.The multi-scale rock physics template is applied to the tight-gas reservoir prediction in Sichuan Province.The quantitative estimation of rock porosity and gas saturation matches very well with well gas production tests.
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Wei Xian, Yang Zhifang, Yan Xinfei, Lu Minghui, Li Xiaoming, Ren Yan. Modified continuous random patchy-saturation model in tight gas detection. Oil Geophysical Prospecting, 2018, 53(6): 1227-1234.
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