关键词: 储层流体, 识别因子, 敏感度, 地震属性, 孔隙度, 岩石物理模拟

Abstract: According to the rock physical model, the variation rules of reservoir fluid seismic attributes were analyzed, and a new factor for reservoir fluid identification was presented. Based on the Gassmann equation and other effective rock physical theories, a method for calculating the new factor by using velocities of P wave and S wave (or impedances) was given. The sensitivity difference between the new factor and other factors were analyzed and compared quantitatively. The effects of porosity variation on the fluid identification factors were studied using the similar method. The new fluid identification factor, which is not affected by the porosity variation, has higher sensitivity than the traditional factors affected by the porosity variation. Thus, the new fluid identification factor is helpful to decrease uncertainty of reservoir fluid identification and improve reservoir drilling rate.

Key words: reservoir fluid, identification factor, sensitivity, seismic attribute, porosity, rock physical modeling