The Open Petroleum Engineering Journal


ISSN: 1874-8341 ― Volume 12, 2019

A Calculation Model of the Net Pressure for Forming Map Cracking in Coalbed with Cleats During Hydraulic Fracturing Process

The Open Petroleum Engineering Journal , 2015, 8: 193-197

Li Yuwei, Ai Chi, Liu Yazhen

College of Petroleum Engineering, Northeast Petroleum University, Daqing 163318, Heilongjiang province, China.

Electronic publication date 12/6/2015
[DOI: 10.2174/1874834101508010193]

CrossRef Citations:

Article Metrics:

Geographical View
Total Statistics:

Abstract HTML Views: 951
PDF Downloads: 311
Total Views/Downloads: 1443

Unique Statistics:

Abstract HTML Views: 618
PDF Downloads: 191
Total Views/Downloads: 951


An important prerequisite for achieving efficient exploitation of coalbed methane wells is through forming map cracking by hydraulic fracturing. In order to analyze the mechanical mechanism for forming map cracking of the coal bed with cleats, the mechanical conditions for forming map cracking during hydraulic fracturing process of coal bed was proposed using extensional faulting in elastic mechanics and the shear damage criterion, and the minimum net pressure calculation model for forming map cracking was established when the butt cleat and face cleat in coal opened at the same time. It can be concluded through using the calculation model that the net pressure value that needed for forming map cracking first decreased and then increased with the increasing of the angle between the face cleat and the direction of horizontal minimum principal stress. The cleats and fissures developed along the horizontal maximum principal stress were easy to open and extend under the effect of hydraulic fracturing. The variation of the internal friction coefficient variation of the face cleat had little effect on the minimum net pressure that was needed for forming map fracturing after the angle between the direction of face cleat and horizontal minimum principal stress is determined.

Download PDF


"I have to express my sincere appreciation for your hard and professional work. Thank you very much!"

Si Zhang
Institute for Strength and Vibration of Mechanical Structures,
Yangtze University, Jingzhou,
Hubei Province,

"My experiences in publishing a paper with Bentham Open is good. I must say that the speed of publication in The Open Petroleum Engineering Journal is very fast. It takes only two month for the pioneer reviewing process. The delay was caused by me. And what’s more, the publisher’s office is quite helpful. I guess they are dealing with thousands emails every week, but they process my request in a very short period of time."

Xin Ma
School of Science, Southwest Petroleum University, Chengdu, China

Browse Contents

Webmaster Contact:
Copyright © 2019 Bentham Open