干热岩地层通常为火成岩,地层可钻性差、温度高,钻探过程中容易发生漏失、井喷、井涌等事故。中国干热岩钻探井控技术及装备略显不足。为满足干热岩钻探高温井控需要,保障施工安全,分析了干热岩钻探地层温度、压力与井喷的关系。针对干热岩钻探特点,设计了旋转防喷器及配套控制系统,该旋转防喷器具有结构简单、耐高温、高转速、操作简单等特点。应用该旋转防喷器可有效改善干热岩钻探工作环境,降低钻探风险,确保施工安全。
Hot dry rock formations are usually igneous rock with poor drillability and high temperature. Circulation loss, blowout, well kick and other drilling accidents occur frequently in hot dry rock drilling. Domestic well control techniques and equipment cannot meet the requirement of hot dry rock drilling. To satisfy the need of high-temperature well control and guarantee construction safety, this paper analyzes the relationship between the formation temperature, pressure and blowout and designs a high-speed rotary blowout preventer and control system with simple structure and high-temperature capacity, which can improve the drilling efficiency and reduce drilling risks.
[1] Finger J, Blankenship D. Handbook of best practices for geothermal drilling[M]. New mexico: Sandia National Laboratories, 2010.
[2] Anderson I. Blowout blights future of Hawaii's geothermal power[J]. New Scientist, 1991, 131: 17.
[3] Meier U, Ernst P L. Drilling and completion of the Urach III HDR test well[C]. The International Conference on Geothermal Drilling and Com-pletion Technology, Hannover, Germany, January 21-23, 1981.
[4] 杨庆理. 石油天然气钻井井控[M]. 北京: 石油工业出版社, 2008. Yang Qingli. Oil and gas well control[M]. Beijing: Petroleum Industry Press, 2008.
[5] 罗宁根. FX28-35型旋转防喷器的研制[J]. 海洋石油, 2003, 23(12S): 106-110. Luo Ninggen. The design and manufacture of FX28-35 type of rotating blowout preventer[J]. Offshore Oil, 2003, 23(12S): 106-110.
[6] 赵金洲, 张桂林. 钻井工程技术手册[M]. 2版. 北京: 中国石化出版 社, 2011: 843-852. Zhao Jinzhou, Zhang Guilin. Handbook of drilling engineering[M]. 2nd ed. Beijing: China Petrochemical Press Co., Ltd., 2011: 843-852.
[7] 金迅. 旋转控制头工作机理研究及结构设计[D]. 成都: 西南石油大 学, 2004: 3. Jin Xun. Research and design of rotary control head[D]. Chengdu: Southwest Petroleum University, 2004: 3.
[8] Brown D. The US hot dry rock program-20 years of experience in reser-voir testing[C]. World Geothermal Congress, Florence, Italy, May 18-31, 1995.
[9] 张慧. 新型旋转防喷器的设计研究[D]. 成都: 西南石油大学, 2007. Zhang Hui. Research and design of new type rotating blowout preventer[D]. Chengdu: Southwest Petroleum University, 2007.
[10] 万秀琦. 旋转防喷液压控制系统研制[D]. 山东: 中国石油大学(华 东), 2008. Wan Xiuqi. Research and development of RBOP hydraulic control system[D]. Shandong: China University of Petroleum, 2008.
