New Development Of In-Situ Stress Measurement With Hydraulic Fracturing Technique At Great Depth In China

Hydraulic fracturing technique is a commonly used technique for rock stress measurement. Based on the demand of various rock projects which are towards to larger scale and deeper position, it is necessary to develop proper techniques suitable for in-situ stress measurement at great depth. Some bottleneck problems influencing reliable use of the traditional hydraulic fracturing technique at great depth are analyzed. To solve these problems, corresponding key improved techniques have been developed and successfully used for in-situ stress measurement at depth more than 2500m in China.