深钻孔壁面局部应力解除法三维地应力测试设备设计

Design of In-situ 3D Ground Stress Measuring Apparatus for Deep Boreholes Using Wall Stress Relief Method

页岩气开采与利用、常规油气资源开发、重大水利水电工程、深部采矿、地球科学基础研究等领域对深部地应力测量有强烈需求。钻孔壁面局部应力解除法适用于深钻孔地应力测量。在水平孔地应力测试设备BWSRMH01基础上设计了一套适用于深钻孔的三维地应力测试设备,可实现设备定位、孔壁应变传感器粘贴、孔壁应力解除及应变测量等功能,介绍了设备的测试原理、关键部件设计方案,最后简介了该设备的地应力测试流程。该设备的设计研发具有完全自主知识产权,目前设备耐压耐温性能达到1200m深钻孔的测试环境要求。

The measurement of deep ground stress is widely applied in shale gas extraction,conventional oil and natural gas exploration,large hydroelectricity and irrigation projects,deep mining and fundamental earth science research areas.The borehole wall local stress relief method is suitable for the rock stress measurement at a great depth.This paper presents an improved three-dimensional deep rock stress measurement apparatus based on the existing ground stress measurement device,BWSRM-H01in a horizontal borehole.The improved device can perform the locating,installation of the strain gauges at the borehole surface,relieving of the borehole surface and strain measurement.The design approach of key components of the device is introduced in this paper.The in-situ rock stress measuring procedure of the improved apparatus is also briefly presented.The design and development of the apparatus has the in-house owned intellectual property.Currently,the pressure and temperature resistance of the instrument is suitable for the measurement of 1200mdeep borehole.