State-of-the-art and developing trend of CBM drilling technologies in China

被引：7

作者：

Wang, Yishan ^{[1
]}

Wang, Helin ^{[2
]}

Liu, Dawei ^{[3
]}

Yuan, Menglei ^{[4
]}

Jiang, Haitao ^{[1
]}

机构：

[1] Engineering Technology Research Institute of Bohai Drilling Engineering Co., Ltd., CNPC, Tianjin

[2] Bohai Drilling Engineering Co., Ltd., CNPC, Tianjin

[3] School of Petroleum Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, Guangdong

[4] Directional Drilling Service Company of Bohai Drilling Engineering Co., Ltd., CNPC, Dagang, Tianjin

来源：

Natural Gas Industry | 2014年 / 34卷 / 08期

关键词：

CBM; China; Coal seam damage control; Drilling; Multi-branch horizontal well; U-shape well; Wellbore stability;

D O I：

10.3787/j.issn.1000-0976.2014.08.013

中图分类号：

学科分类号：

摘要：

Many bottlenecking technical difficulties including weak geological foundation, poor wellbore stability, serious damage to coal seams during drilling, etc. are seriously hampering the coalbed methane (CBM) exploration and development in China. However, some progress made in multi-lateral horizontal well technology, U-shape well technology and their supporting techniques in connection and bare-hole cave well completion, has alleviated the above problems to a certain degree. The production practices show that the conflict between drilling safety and coal protection resulted from water drilling is still prominent and CBM production is still low. In order to effectively improve the exploration and development benefit of CBM, we presented some suggestions as follows. (1) Specific drilling fluids for coal seams and some relief methods for damage to coal seams should be researched and developed. (2) The unified industrial codes and national standards should be soon formulated for CBM drilling-related experimental and field evaluation methods. (3) The mining right system reform should be explored and deepened. (4) Further studies should be conducted of technologies in the combined production of CBM, conventional gas, and tight gas, and some CBM enhanced technologies like multilayer drilling and completion, complex structure well stimulation techniques, and so on.

引用

页码：87 / 91

页数：4

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