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本文从WXS凹陷中低孔渗储层岩石声波实验出发,以岩样的纵横波速度和密度为基础数据,求取出一系列的弹性参数,包括纵横波波速比、纵波波阻抗、横波波阻抗、泊松比、拉梅常数、剪切模量、体积模量、杨氏模量,等等。在前人的孔隙流体识别究基础上,综合相关理论和实验分析,构建了一个新的流体识别因子F。以饱和流体岩石弹性参数及其组合参数的相对变化量Ag/w和Ao/w为定量指标,评价各流体识别因子的流体识别效果,并采用交会图技术进行了验证。新流体敏感因子在传统较难分辨的孔隙流体“水”和“油”的区别上具有良好效果,有利于提高中低孔渗储层流体识别的成功率。
Based on the rock acoustic wave experiment of low porosity and permeability reservoirs in the WXS depression, a series of elastic parameters were obtained based on the data of P-wave velocity and density of rock samples, including the S / S wave velocity ratio, longitudinal wave impedance, transverse wave impedance, Poisson’s ratio, Lame constant, shear modulus, bulk modulus, Young’s modulus, and the like. Based on the previous studies on pore fluid identification, a new fluid identification factor F was constructed based on the related theory and experimental analysis. The fluid identification effect of each fluid identification factor was evaluated based on the relative change of elastic parameters of rock and Ag / w and Ao / w, and the cross-plot method was used to verify the results. The new fluid-sensitive factor has good effect on the difference between the traditional and difficult-to-distinguish pore fluids “water ” and “oil ”, which helps to improve the success rate of fluid identification in reservoirs with moderate to low porosity and permeability.