我国煤层气增产技术进展与发展方向

【作者】 李小刚； 杨长鑫； 杨兆中； 罗平亚； 贺宇廷； 张景强； 何建冈； 丁海波；

【机构】 西南石油大学石油与天然气工程学院； 西南石油大学油气藏地质及开发工程国家重点实验室； 卡尔加里大学工程学院；

【摘要】 中国煤层气资源储量丰富,开发潜力巨大,但资源品位低下,储层结构复杂,通过常规油气资源的开发方式无法获取经济性产能,增产改造技术成为了煤层气资源有效开发利用的关键。为深入研究煤层气高效增产技术,详细阐述了国内煤层气开发与增产技术的发展历程,重点分析了钻完井、压裂、排采、煤气化这四种煤层气增产技术体系,评价每种增产技术体系的优缺点,并指出各自的适用范围,分析了目前的发展现状与现场应用成效。基于煤层气开发存在的问题与增产技术发展现状,总结煤层气增产技术面临的挑战,并对国内未来煤层气增产技术发展进行展望:(1)工厂化煤层快速钻井技术;(2)煤层气压裂裂缝监测技术;(3)多层合采增产技术;(4)无水化压裂改造技术;(5)智能化煤层气排采技术;(6)地质工程一体化开发模式。通过加强煤层气增产理论与技术创新性和探索性发展,打破现阶段煤层气单井产量低下、开发增速缓慢的局面,以期国内煤层气产业实现大规模效益开发。更多还原

【Abstract】 There are abundant coalbed methane(CBM) resources in China with huge development potential. However, economic productivity cannot be obtained through conventional oil and gas resource development methods with low-grad resource and complex formation structure. Stimulation technology has become the key to the effective development and utilization of CBM resources. In order to study the high-efficiency stimulation technology of CBM, the development history of domestic CBM and stimulation technology was elaborated. The four types of CBM stimulation technology systems,including drilling and completion, hydraulic fracturing, drainage and coal gasification, were analyzed and evaluated. The advantages, disadvantages and respective scopes of each stimulation technology are pointed out, and the current development status and field application effects are analyzed, too. Based on the existing problems of CBM development and the progress of stimulation technology, this paper summarizes the challenges and development direction of CBM stimulation technology:(1)industrialized coal seam rapid drilling technology;(2) hydraulic fracturing monitoring technology;(3) multi-layer combined stimulation technology;(4) waterless hydraulic fracturing technology;(5)intelligent CBM drainage technology;(6)geological engineering integration development model. The situation of low CBM production and slow development speed can be improved by strengthening the theoretical research and technological innovation development of CBM, with a view to achieving large-scale beneficial development of the domestic CBM industry.更多还原