天然气水合物的储层保护技术探讨

The discussion of reservoir protection of natural gas hydrates reservoir

李登伟 张烈辉 刘大伟 王志强 梁雪原 郭了萍

Li Dengwei Zhang Liehui Liu Dawei Wang Zhiqing Liang Xuey uan Guo Liaoping

"油气藏地质及开发工程"国家重点实验室, 西南石油大学, 四川 成都 610500; 西南石油大学 研究生院, 四川 成都 610500; 大庆油田有限责任公司 第九采油厂, 黑龙江 大庆 163853; 中法渤海服务有限公司, 天津 塘沽 300452

The State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China; Department of Graduate Student, Southwest Petroleum University, Chengdu 610500, China; Oil Production Plant No.9 of Daqing Oilfield Company Ltd., Daqing 163853, China; China & France Bohai Geoservices Company, Tanggu 300452, China

目前,天然气水合物的开采技术主要有热激化技术、井下电磁加热技术、化学试剂技术和减压技术等四种技术。只有综合运用降压技术、热激化技术,特别是井下电磁加热技术和现代钻井新技术相结合会更有效地开采天然气水合物。文章归纳总结了天然气水合物的开采技术和开采过程中可能遇到的储层损害问题及其对策。同时,根据天然气水合物的物理力学性质、分布和成藏环境以及钻井特点,认为天然气水合物可能存在的储层损害问题有温度敏感、应力敏感、井漏井喷、井壁坍塌、井眼缩径及蠕变等,并分析了各种储层损害的原理,可能造成的危害及其解决措施。

Based on the analysis of resources home and abroad, the exploitation techniques are generated in this paper. The decompressing technique, thermal excitation technique, chemical reagent technique are the normal techniques to exploit natural gas hydrates. The combination of the thermal excitation technique and decompressing technique has bright future. Meanwhile, according to the natural gas hydrates characteristic of distributing and drilling and generating environment, natural gas hydrates may be damaged in reservoir such as temperature sensitiveness, pressure sensitiveness, well leakage and blowout, borehole shrinkage and borehole creepage, ect. This paper analyzes the principles and possible damage of all kinds of reservoir damage, and proposes solving measures.

中国石油天然气集团公司石油科技中青年创新基金项目(编号:04E7047);高等学校优秀青年教师教学科研奖励计划(TROAPY)、教育部博士点基金(编号:20040615004)和四川省学术和科技带头人基金(2200320)联合资助。