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Global Geology 2015, 18(1) 49-53 DOI:
ISSN: 1673-9736 CN: 22-1371/P |
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Prediction of application scope of vertical fracture strike based on scattered wave fracture orientation function |
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TANG Yufei, LIU Yuwei, LIU Xiwu and YANG Guodong |
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1�� College of Geo- Exploration Science and Technology��Jilin University��Changchun 130026��China; 2�� ��esearch Institute of Petroleum Exploration and Development��Sinopec��Beijing 100083��China |
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Abstract��
Fracture system plays a very important role in the enrichment and accumulation of oil and gas in the reservoirs�� Based on scattering wave information�� Fracture Orientation Function (FOF) was built�� which can be used to predict the fracture orientations�� However��this method has only been verified by physical experiments without studies on the application scope�� In this study�� based on the linear sliding theory�� FOF of the scattering wave was applied to the numerical simulation and the application scope was further studied according to fracture flexibility tensor�� According to the fractures filled with gas and liquid�� numerical simulation was conducted on the models with various fracture flexibilities�� Numerical simulation results were used to inverse fracture orientation with the aid of the FOF of the scattering wave�� The results show that it is workable to predict the vertical fracture orientation with the FOF of the scattering wave�� Application of this method is more effective when the fractures are filled with gas than liquid�� Moreover��the application scope can be predicted by the fracture flexibility�� |
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Keywords��
scattering wave
fracture strike
fracture orientation function
fracture flexibility tensor
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