【摘要】 地应力地理方位是合理井网布置、水力压裂设计、复杂结构井定向方位优选及安全钻井液密度窗口确定的重要基础参数。针对室内地应力测试方法对非定向岩芯无法确定水平地应力地理方位的难题,利用深部地层岩芯的黏滞剩磁分量标定岩芯的地理方位;同时对标定岩芯开展围压下的声发射Kaiser试验,测量出水平地应力大小和相对方位;最终确定出最大、最小地应力的地理方位。该方法解决Kaiser试验地应力地理方位无法确定的难题,完善深层地应力测试方法,可为钻井工程和油田增产措施优化设计提供基础的数据。更多还原

【Abstract】 Geographic orientation of geostress is an important basic parameter for reasonable well layout,hydraulic fracturing design,optimization of directional orientation of complex structural well and determination of safe drilling fluid density window. According to the problems that laboratory geostress testing methods can not determine the geographic orientation of horizontal geostress for nondirectional cores,the geographic orientation of cores is calibrated by using viscous remanent magnetization component;the acoustic emission Kaiser test under confining pressures for calibrated cores is carried out so as to determine the magnitude and relative orientation of horizontal geostress. Eventually,the geographic orientations of the maximum and minor principal geostresses are determined. This method solves the problem that the geographic orientation of geostresses can not be determined by using Kaiser test and improves the testing methods of geostress in deep formation. Meanwhile,it provides basic data for drilling engineering and optimization of oilfield stimulation.更多还原