Effect of Threshold Pressure Gradients on Control Areas Determination of Production Well in CBM Reservoirs
Joint Authors
Wang, Ruifei
Yang, Jiaosheng
Wang, Meizhu
Zhao, Yang
Chen, Weiqing
Source
Advances in Polymer Technology
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-12-18
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Understanding the mechanism of water drainage and gas recovery is the burning issue for Coalbed Methane (CBM) reservoir development.
In the process of exploitation, threshold pressure gradients (TPG) is an important factor affecting the control areas, which related to the low-permeability and complex water saturation of CBM reservoirs.
In this paper, a new flow model of CBM has been established considering the TPG and gas desorption.
Then we carried out a series of experiments and fitted out a new relational expression between TPG and permeability and water saturation, which shows that TPG is negatively correlated with permeability and positively correlated with water saturation.
After that, we analyzed the influence of TPG and desorption on the control radius and illustrated a case study.
The results show that TPG and desorption effect both can slow down the rate of pressure reduction.
The case study indicates that the control radius of target well groups ranges from 55 m to 136.7 m The average control radius and gas TPG are 91.3 m 0.0082 MPa/m respectively.
Furthermore, we classify the wells into 5 categories, which are mainly distributed in III (80∼100 m).
Finally, we suggest using well pattern infilling in region II and III and hydraulic fracturing method for region IV to increase the utilization area and the sustainability for the target area.
This study provides a quick and reasonable prediction of control radius in CBM reservoir with different water saturation for further adjustment suggestion and sustainable development.
American Psychological Association (APA)
Wang, Ruifei& Yang, Jiaosheng& Wang, Meizhu& Zhao, Yang& Chen, Weiqing. 2019. Effect of Threshold Pressure Gradients on Control Areas Determination of Production Well in CBM Reservoirs. Advances in Polymer Technology،Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1121932
Modern Language Association (MLA)
Wang, Ruifei…[et al.]. Effect of Threshold Pressure Gradients on Control Areas Determination of Production Well in CBM Reservoirs. Advances in Polymer Technology No. 2019 (2019), pp.1-10.
https://search.emarefa.net/detail/BIM-1121932
American Medical Association (AMA)
Wang, Ruifei& Yang, Jiaosheng& Wang, Meizhu& Zhao, Yang& Chen, Weiqing. Effect of Threshold Pressure Gradients on Control Areas Determination of Production Well in CBM Reservoirs. Advances in Polymer Technology. 2019. Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1121932
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1121932