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Copyright of Science Technology & Engineering is the property of Chinese Society of Technology Economics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Petroleum Geology & Oilfield Development in Daqing is the property of Editorial Department of Petroleum Geology & Oilfield Development in Daqing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Because natural cracks are not smooth cracks, in the process of identifying cracks by acoustic and electrical imaging, if cracks are regarded as smooth cracks, errors will be generated. Stoneley wave reflection coefficient has high sensitivity to crack width, and stoneley wave is often used to identify cracks. Physical experiment and numerical simulation were used to study the influence of rough fracture on acoustic response. In the aspect of experiment, the crack roughness experiment of model well was carried out, and the relationship between crack width and attenuation coefficient of rough crack was obtained. Numerical simulation of horizontal crack borehole model was carried out to study the influence of sinusoidal rough crack on stoneley wave. The roughness of crack surface was described by tortuosity. The experimental results show that the attenuation coefficient of stoneley wave will increase with the increase of notch on the crack surface. The simulation results show that the smaller the width of rough crack, the larger the gap between the attenuation coefficient of smooth crack and the same width. The relationship between stoneley wave attenuation coefficient and crack width and tortuosity is established by fitting. [ABSTRACT FROM AUTHOR]

Copyright of Journal of China University of Petroleum is the property of China University of Petroleum and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Petroleum Geology & Recovery Efficiency is the property of Petroleum Geology & Recovery Efficiency and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)