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Formation Stress Interpretation Method from Dipmeter Logs

Chen Yinhao  
The unbalance of the formation stress causes collapses of a borehole wall.The collapses of the wall and their directions can be detected by a dipmater tool. The relationship between borehole wall collapses, their directions and the forma-tion stress field is discussed. The interpretation method of formation stress fromdipmeter logs is presented. The method has been applied to the formation stressanalysis in Sichuan Gas Field with satistactory results. Before fracture treatment,formation stress data can be used for predicting the magnitude of fracture pressureand the extension direction of the introduced fractures
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