Gas saturation analysis with seismic dispersion attribute based on patchy-saturation model
Wang Yaojun1,2, Chen Shuangquan1,2, Wang Lei1,2, Li Xiangyang1,2, Deng Caifeng3
1. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China;
2. CNPC Key Laboratory of Geophysical Prospecting, China University of Petroleum (Beijing), Beijing 102249, China;
3. Dagang Oilfield Company, Petro China, Tianjin 300280, China
Abstract：We study dispersion and attenuation influences with different gas saturations on normal incidence reflection coefficient (NI), velocity and attenuation. It is observed that the dispersion and amplitude versus frequency (AVF) occur in seismic frequency band in partly gas saturated reservoirs. In addition, reflection coefficient frequency gradient is corresponding to dispersion, and both of them are sensitive to gas saturation. Thevefore, we can estimate reservoir gas saturation by crossplots analysis of gas saturation, reflection coefficient frequency gradient, and reflection coefficient.
王峣钧, 陈双全, 王磊, 李向阳, 邓彩凤. 基于斑块饱和模型利用地震波频散特征分析含气饱和度[J]. 石油地球物理勘探, 2014, 49(4): 715-722.
Wang Yaojun, Chen Shuangquan, Wang Lei, Li Xiangyang, Deng Caifeng. Gas saturation analysis with seismic dispersion attribute based on patchy-saturation model. OGP, 2014, 49(4): 715-722.
