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| MEASUREMENT TECHNIQUE OF OILFIELD IN-SITU STRESS AND DISTRIBUTION REGULATION OF IN-SITU STRESSES IN WEST CHINA |
| Zhang Shouliang1, Deng Jingen1, Xu Xianguang2, Li Weixuan2, Zha Yongjin2 |
| (1University of Petroleum, Beijing 102200 China) (2The Research Institute of Xinjiang Oilfield Co., Kelamayi 834000 China) |
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Abstract Wellbore instability is a common and difficult problem encountered in drilling. The key work is calculating accurately the in-situ stress,for it is different with the tectonic region and formation property. The measuring techniques of in-situ stress at depth are described by the local hydrofracturing method,acoustic emission Kaiser effect method and the means improving measurement accuracy by data process method. The in-situ stress calculation mode at foothill tectonic belt of different layers is established. At last,the real measurement result of in-situ stresses and region distributing regulation in Xinjiang are presented.
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1 周维垣. 高等岩石力学[M]. 北京:水利电力出版社,1989
2 Leeman E R. The Measurement of the Stress in the Ground Surround- ing Mining Excavations[M]. Washington:Prentice Hall,1960
3 Zoback M D,Moos D,Mastin L,et al. Comment on Wellbore Breakouts and in Situ Stress[M]. Boston:Mastin,1986
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