论文成果

Experimental study of radial drilling-fracturing for coalbed methane

摘要:Radial drilling-fracturing, the integration of radial drilling and hydraulic fracturing, is an innovative approach to develop coalbed methane (CBM). The objective of this article is to investigate fracture initiation and propagation characteristics for different radial borehole parameters. We conducted experiments using a true tri-axial fracturing simulation system under different lateral lengths, counts and azimuths. High-rank coals from the outcrop were used as the raw samples for the experiments. Results show that: The best effect is achieved when it initiates from the bedding plane where the laterals lie and forms a fracture network with one main horizontal fracture connecting multiple vertical fractures; the breakdown and injection pressure decrease with the lateral length and count increasing; increasing the lateral length enlarges the horizontal fracture area; and the optimal lateral design for horizontal initiation is four laterals with the phase of 90° and each lateral is at 45° from the horizontal in-situ stress. The key findings of this work could provide critical insights into understanding radial drilling-fracturing characteristics.
© 2017 American Rock Mechanics Association (ARMA). All rights reserved.

卷、期、页:v 1,p354-361

发表日期:2017-01-01

期刊分区(SCI为中科院分区):无

收录情况:EI(工程索引)

发表期刊名称:51st US Rock Mechanics / Geomechanics Symposium 2017

通讯作者:刘庆岭,张祯祥,付宣

第一作者:田守嶒,李根生,沈忠厚,黄中伟,盛茂

论文类型:会议论文

论文概要:刘庆岭,田守嶒,李根生,沈忠厚,黄中伟,盛茂,张祯祥,付宣,Experimental study of radial drilling-fracturing for coalbed methane,51st US Rock Mechanics / Geomechanics Symposium 2017,2017,v 1,p354-361

论文题目:Experimental study of radial drilling-fracturing for coalbed methane