摘要
煤层气是一种新型接替能源,世界上很多国家都已投入煤层气的勘探和开发,其中美国、加拿大、澳大利亚的煤层气产业发展迅速。我国煤层气储存量非常丰富,在一定程度上能解决能源供给不足,但是我国煤层气储层特征相对复杂,勘探与开发难度颇大,不合理的煤层气井钻、完井方式会对储层造成伤害,影响煤层气的产出。针对上述问题,提出了适应我国绝大多数煤层气储层的钻井工艺和完井方式,着重介绍各种煤层气井钻井工艺和完井技术。分析结果表明:采用欠/微平衡钻井工艺与裸眼完井、动力洞穴完井和套管射孔压裂完井等完井技术配套开发煤层气,有利于减小对储层基质、割理的伤害,提高采气量。最后对我国煤层气的勘探开发前景进行了展望。
Coalbed methane(CBM) is a new alternative energy,many countries in the world have already been engaged in CBM exploration and development and this industry has rapidly developed especially in America,Canada and Australia.China has very abundant CBM resource,development and effective utilization of CBM can improve our energy structures to a certain extent and mitigate energy supply shortage.However,complex CBM reservoir characteristics in China,difficult exploration and development and immature drilling and well completion technologies may damage CBM reservoir and affect its output greatly.In order to overcome the above issues,put forward are some drilling technologies and completion methods suitable for most of CBM reservoirs in China and emphatically introduced and analyzed are these technologies and methods.Analysis results show that reasonable usage of underbalanced drilling technologies and well completion technologies(open hole completion,power cave completion and casing perforating fracturing completion) will be conducive to reduce damage on the reservoir groundmass and cleat and thus enhance CBM output.Also forecast are CBM exploration and development prospect in China.
出处
《天然气与石油》
2011年第6期40-45,4,共6页
Natural Gas and Oil
基金
国家973项目"高丰度煤层气富集机制及提高开采效率基础研究"(2009CB219604)
关键词
煤层气
国外资源分析
储层特征
开发对策
展望
Coalbed methane
Foreign resource analysis
Reservoir characteristic
Development countermeasure
Prospect
