新流体识别因子的构建与应用分析

Construction of a new fluid identification factor and analysis on its application

(1.成都理工大学信息工程学院,四川成都610059;2.成都理工大学油气藏地质与开发工程国家重点实验室,四川成都610059)

College of Information Engineering, Chengdu University of Technology, Chengdu 610059, China

阐述了一种基于波阻抗的高灵敏度流体识别因子的构建思路，并利用数值模拟和实际地震资料对构建的新流体识别因子进行了验证。首先对常用流体识别因子进行了分析和总结；然后基于Hilterman的研究结果讨论了含不同流体砂岩的物理特性，分析了纵、横波波阻抗对流体的敏感性；基于此，对已有的流体识别因子进行修改，增加了对流体敏感的λρ项，得到了一个更为灵敏的流体识别因子，并以含气砂岩和含水砂岩为例，分析了各种流体识别因子的识别效果。数值模拟和实际地震资料处理结果表明，新的流体识别因子可以很好地对储层中所含流体进行识别。

The construction of high sensitive fluid identification factor based on wave impedance is described. In additional, numerical simulation and actual seismic data were used to identify the newly constructed fluid identification factor. Firstly, the common fluid identification factors were analyzed and summarized. Then, the physical characteristics for fluid-bearing sandstone was discussed based on the study results of Hilterman, and the sensitivity of P-wave and S-wave impedance on fluid was analyzed. Based on the research, we modified the existing fluid identification factors, increased sensitive items to fluid, and obtained a more sensitive fluid identification factor. The gas-bearing sandstone and water-bearing sandstone were used to analyze the identification effect. Numerical simulation and actual data processing results show that the new fluid identification factor can effectively identify the fluid in reservoir.