摘要
近年来发展的孔隙、裂隙介质弹性波动理论是孔隙介质声学的重要进展,提高了声学参数对岩石流体识别的灵敏度.岩石中裂隙的存在增大了岩石速度的频散程度.目前发展的孔、裂隙弹性波理论可较好地模拟实验室观测到的岩石频散和衰减特征.将此理论应用于非常规油气储层的油气识别可大大提高解释的可靠性.本文综述了孔隙介质声学及孔裂隙理论的研究现状,阐述了孔、裂隙介质弹性波的传播机理;通过模拟实验室超声测量的岩石声速验证了孔、裂隙弹性波理论的可靠性.将此理论应用于测井实际数据,反演得到了地层的流体性质,反演结果显示明显提高了识别流体性质的可靠性.
The developed elastic wave theory of cracked porous media in recent years is an important progress in pore medium acoustics. It improves the sensitivity of acoustic parameters to the rock fluid identification. The existence of cracks in the rock increases the frequency dispersion degree of rock velocity. At present, the development of elastic wave theory in cracked porous media can be used to simulate the dispersion and attenuation characteristics of the rock in the laboratory. The application of this theory to the identification of unconventional oil and gas reservoirs can greatly improve the reliability of the interpretation. This paper summarizes the research status of porous medium acoustics and the cracked porous theory, expounds wave＇s propagation mechanism in the cracked porous medium elastic; reliability of the theory for elastic wave propagation through porous media containing cracks is verified through simulating rock velocity measured in laboratory. Applying this theory to the actual data from well logging, the fluid properties of the formation are obtained. The inversion results show that the reliability of the identifying fluid is greatly improved.
出处
《地球物理学进展》
CSCD
北大核心
2017年第2期626-633,共8页
Progress in Geophysics
关键词
孔、裂隙介质
声学
弹性波
油气识别
cracked porous media
acoustics
elastic wave
oil and gas identification
