Results 11 to 20 of about 6,679 (242)

Determination on Effective Drainage Radius of In-Seam Borehole Based on Gas Content Test and Numerical Simulation Calculation Method [PDF]

ACS Omega
In order to accurately and efficiently determine the effective drainage radius of the in-seam borehole, the advantages and disadvantages of the current effective drainage radius test methods are analyzed, and the method of combining the gas content field and numerical simulation calculation is proposed to accurately determine the effective drainage ...
Shujun Ma, Zhaofeng Wang, Lingling Qi, Liguo Wang, Haidong Chen   +4 more
doaj   +7 more sources

Measurement and simulation study on effective drainage radius of borehole along coal seam [PDF]

Energy Exploration & Exploitation, 2019
A measurement study was conducted for the effective drainage radius of borehole along coal seam #9 of the Kaiyuan Coal Mine using the gas pressure method and gas flow method.
Wei Qin, Jialin Xu, Guozhong Hu, Jie Gao, Guang Xu   +4 more
doaj   +6 more sources

Numerical Investigation on Potential Influencing Factors Affecting Drainage Effective Radius of Crossing Borehole

Sustainability, 2023
Crossing borehole is an effective means to eliminate the outburst risk of coal and gas. The influence of borehole inclination angle, borehole diameter, and drainage time on the effective radius of gas drainage are studied by numerical simulation and engineering example verification.
Wu Xiao, Ke Li, Chuanjie Zhu, Ziwen Li, Baiquan Lin, Cong Ma, Mingkai Si   +6 more
exaly   +4 more sources

Numerical Simulation of Effective Extraction Radius of Pre-Drainage Borehole Based on Coal Damage Model

Sustainability, 2023
Borehole pre-drainage is an important technical means to control a coal mine gas disaster. In order to determine the optimal pre-drainage parameters of Dashucun mine, a coal damage permeability evolution model was established based on coal damage deformation, considering gas adsorption and desorption and the Klinkenberg effect, and a damage fluid ...
Dangyu Zhang, Minbo Zhang, Shilong Zhang, Zichao Wang, Yan Jin, Rentao Liu   +5 more
exaly   +4 more sources

Study on numerical simulation of effective drainage radius of drilling hole in coal seam

Gong-kuang zidonghua, 2016
A seepage-stress coupling model of coal containing gas was established considering effect of coal permeability changing on gas flow based on coal seam gas flow theory and elastic mechanic.
WEI Fengqing, CHENG Peidong, ZHANG Junxiang, DU Xiaoqi   +3 more
doaj   +3 more sources

Modeling and prediction for gas production during coalbed methane drainage based on two indirect reservoir parameters

Energy Exploration & Exploitation, 2018
Two indirect parameters influencing coalbed methane (CBM) drainage performances are proposed in this paper, which are effective desorption radius and difference between reservoir pressure and critical desorption pressure (DRPCDP).
Mingjun Zou, Xiaochun Lv, Zhiquan Huang, Simin Wei, Miao Zhang, Changxin Sun   +5 more
doaj   +3 more sources

A novel model for predicting the productivity index of horizontal/vertical wells based on Darcy's law, drainage radius, and flow convergence

Heliyon
The Productivity Index (PI) of oil wells is essential to developing a field's production plan, and previous studies report different models for predicting the PI of horizontal or vertical wells. However, predicting the PI of horizontal and vertical wells
Roland I. Nwonodi
doaj   +4 more sources

Research on determination method of effective drainage radius of gas drainage borehole

Gong-kuang zidonghua, 2020
In order to solve the problems of complex process and lower accuracy in current determination method of effective drainage radius of gas drainage borehole, a determination method of effective drainage radius was put forward, which is based on the law of ...
LIU Dianping, MA Wenwei
doaj   +2 more sources

Numerical Simulation of Gas-Solid Coupling in Pressure-Relief Gas Drainage of Short-Distance and Underprotective Steeply Inclined Coal Seam Mining

Geofluids, 2022
The accuracy of the drainage radius plays a vital role in the gas drainage effect, and the establishment of the drainage model and numerical calculation of the model has an essential value for the accurate determination of the drainage radius.
Xinshan Peng, Zhaofeng Wang, Lingling Qi
doaj   +2 more sources

Study on effective extraction radius of bedding borehole under the impact of normal fault

Gong-kuang zidonghua, 2022
The reasonable effective extraction radius of borehole is the key to ensure gas extraction effect. However, the research of effective extraction radius mainly focuses on the measurement method of effective extraction radius of borehole, and there is a ...
JIANG Mingquan, KANG Xiangtao, YAN Chaoxing, TANG Meng, WANG Ziyi   +4 more
doaj   +2 more sources