Analysis on the type of reservoir pressure drop and drainage control of coalbed methane well in the southern block of Shizhuang

Authors

YI Yongxiang, School of Energy and Resources, China University of Geoscience, Beijing 100083, China; Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering, Beijing 100083, China; Shanxi key Laboratory of Resources, Environment and Disaster Monitoring, Jinzhong 030600, China
TANG Shuheng, School of Energy and Resources, China University of Geoscience, Beijing 100083, China; Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering, Beijing 100083, China; Shanxi key Laboratory of Resources, Environment and Disaster Monitoring, Jinzhong 030600, ChinaFollow
ZHANG Songhang, School of Energy and Resources, China University of Geoscience, Beijing 100083, China; Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering, Beijing 100083, China; Shanxi key Laboratory of Resources, Environment and Disaster Monitoring, Jinzhong 030600, China
YAN Xinlu, School of Energy and Resources, China University of Geoscience, Beijing 100083, China; Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering, Beijing 100083, China; Shanxi key Laboratory of Resources, Environment and Disaster Monitoring, Jinzhong 030600, China
WANG Kaifeng, School of Energy and Resources, China University of Geoscience, Beijing 100083, China; Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering, Beijing 100083, China; Shanxi key Laboratory of Resources, Environment and Disaster Monitoring, Jinzhong 030600, China
DANG Feng, School of Energy and Resources, China University of Geoscience, Beijing 100083, China; Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering, Beijing 100083, China; Shanxi key Laboratory of Resources, Environment and Disaster Monitoring, Jinzhong 030600, China

Abstract

In order to fully understand the reservoir pressure variation characteristics of coalbed methane wells in the southern block of Shizhuang and based on the analysis of reservoir geological parameters and the analysis of actual production data, the reservoir pressures of different types of production wells are analyzed. The specific analysis of the drainage control and reservoir sensitivity effects is also carried out based on the abnormal wells. The results showed that the reservoir lamination of coalbed methane wells in the southern block of Shizhuang can be divided into three types, namely type of rapid pressure drop, type of medium-term stability and type of slow pressure drop. Among them, most high gas production wells are of the type of rapid pressure drop, but too fast drainage and depressurization speed will cause reservoirs to be subjected to various sensitive effects, reduce reservoir permeability, and various factors lead to limited expansion of pressure drop funnels. Finally, the coalbed methane well is inhibited from reaching high yield.

Keywords

Qinshui basin, southern block of Shizhuang, coalbed methane, reservoir pressure, drainage control, reservoir damage

DOI

10.3969/j.issn.1001-1986.2019.05.016

Recommended Citation

YI Yongxiang, TANG Shuheng, ZHANG Songhang, et al. (2019) "Analysis on the type of reservoir pressure drop and drainage control of coalbed methane well in the southern block of Shizhuang," Coal Geology & Exploration: Vol. 47: Iss. 5, Article 17.
DOI: 10.3969/j.issn.1001-1986.2019.05.016
Available at: https://cge.researchcommons.org/journal/vol47/iss5/17

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