Self-adapting extraction of matrix mineral bulk modulus and verifi cation of fl uid substitution
Lin Kai1, Xiong Xiao-Jun1, Yang Xiao2, He Zhen-Hua1, Cao Jun-Xing1, Zhang Xi-Hua1, and Wang Ping2
1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China.
2. CNPC Geophysical Chuanqing Drilling Engineering Co., Ltd. Exploration Company, Chengdu 610213, China.
Abstract：
Gassmann’s equations are commonly used for predicting seismic wave velocity in rock physics research. However the input matrix mineral bulk modulus parameters are not accurate, which greatly infl uences the prediction reliability. In this paper, combining the Russell fl uid factor with the Gassman-Biot-Geertsma equation and introducing the dry-rock Poisson’s ratio, we propose an effective matrix mineral bulk modulus extraction method. This method can adaptively invert the equivalent matrix mineral bulk modulus to apply the Gassmann equation to fluid substitution of complex carbonate reservoirs and increase the fl uid prediction reliability. The verifi cation of the actual material fl uid substitution also shows that this method is reliable, effi cient, and adaptable.
LIN Kai,XIONG Xiao-Jun,YANG Xiao et al. Self-adapting extraction of matrix mineral bulk modulus and verifi cation of fl uid substitution[J]. APPLIED GEOPHYSICS, 2011, 8(2): 110-116.
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2011, Vol. 8 
