A NEW METHOD FOR DETERMINATION OF GEOGRAPHIC ORIENTATION OF DEEP FORMATION GEOSTRESS
(1. Key Laboratory of Petroleum Engineering of Ministry of Education，China University of Petroleum，Beijing 102249，China；2. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China；3. Drilling and Production Technology Research Institute，Chuanqing Drilling Engineering Co.，Ltd.，Guanghan，Sichuan 618300，China；4. School of Civil and Environment Engineering，University of Science and Technology Beijing，Beijing 100083，China)
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.
卢运虎1，陈 勉1，金 衍1，吴 文2，张家振3，李 远4. 深层地应力地理方位确定的新方法[J]. 岩石力学与工程学报, 2011, 30(2): 233-237.
LU Yunhu1，CHEN Mian1，JIN Yan1，WU Wen2，ZHANG Jiazhen3，LI Yuan4. A NEW METHOD FOR DETERMINATION OF GEOGRAPHIC ORIENTATION OF DEEP FORMATION GEOSTRESS. , 2011, 30(2): 233-237.
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2011, Vol. 30 
