Technology and practice for deep CBM fracturing in eastern Ordos basin

Authors

WANG Xuxing, Oilfield Production Optimization Institution, China Oilfield Services Limited, Tianjin 300450, China
WANG Xingzun, Oilfield Production Optimization Institution, China Oilfield Services Limited, Tianjin 300450, China
GUO Bumin, Oilfield Production Optimization Institution, China Oilfield Services Limited, Tianjin 300450, China
YUAN Zheng, Oilfield Production Optimization Institution, China Oilfield Services Limited, Tianjin 300450, China
FENG Qing, Oilfield Production Optimization Institution, China Oilfield Services Limited, Tianjin 300450, China

Abstract

The resources of deep coalbed methane buried at depth of more than 1 200 m in the eastern Ordos basin are rich and the key point for further exploration and development of CBM in the future. Compared with shallow CBM fracturing, there are many challenges in deep CBM fracturing such as with high situ stress, high closure stress, breakdown pressure as well as complex mechanical parameters of rock. Combined with the existing practice of CBM fracturing, taking the deep CBM buried at depth of about 2 000 m in the eastern Ordos basin as an example, tubing+ circulating SSD +packer +tubing shoes were used as operation string and low concentration linear gel as fracturing fluid system. Through on-site operation in 2 wells, the construction is relatively smooth, gas production is quite satisfactory(the output is above 800 m³/d). It proves that the process is simple and easy and provides reference technology for deep CBM fracturing.

Keywords

deep CBM, eastern Ordos basin, fracturing technology

DOI

10.3969/j.issn.1001-1986.2019.01.013

Recommended Citation

WANG Xuxing, WANG Xingzun, GUO Bumin, et al. (2019) "Technology and practice for deep CBM fracturing in eastern Ordos basin," Coal Geology & Exploration: Vol. 47: Iss. 1, Article 14.
DOI: 10.3969/j.issn.1001-1986.2019.01.013
Available at: https://cge.researchcommons.org/journal/vol47/iss1/14

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