流体识别因子试验分析及应用

Test analysis and application of fluid identification factor

(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“油气藏地质及开发工程”国家重点实验室,四川成都610059)

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

利用地震资料对储层中的流体进行识别是储层预测的重要内容之一。基于流体识别因子实现对流体的识别是对储层中流体进行识别的重要方法之一。为了对储层中的流体进行更好的识别,首先从Gassmann公式出发,分析了填充不同流体时岩石对速度和波阻抗的影响,在此基础上进一步提出了一个新的流体识别因子。利用Hilterman统计出的3种砂岩的参数资料分析了几种流体识别因子,结果表明,新的流体识别因子比其它流体识别因子对流体更为敏感,对砂岩的识别能力更强。将流体识别因子应用于QL地区实际地震资料的反演,结果表明,新的流体识别因子的识别能力好于其它因子,能够在一定程度上识别流体。

Fluid identification by seismic data is one of the important content of reservoir prediction.The fluid identification method which is based on fluid identification factor is one of the important methods.In order to better identify the fluid in reservoir,starting from Gassmann formula,the impact of different fluid fillings on velocity and wave impedance was analyzed,then a new fluid identification factor was proposed.Several fluid identification factors were analyzed by using the parameters of three types of sandstone obtained from Hilterman statistics.The result indicates that new factor is more sensitive to fluid than the others,and has better identification effect on sandstone.We applied the new fluid identification factor to the seismic data inversion in QL area,which shows that the new factor has better identification ability than others and can identify fluid to some degree.