School of Earth and Environmental Engineering, Anhui University of Science & Technology School of Resource
and Earth Science, China University of Mining and Technology Shanxi Coal Bed Methane Branch, Huabei Oilfield
Company

为科学优化煤层气井压裂工艺,以沁水盆地南部为例,依据工程数据和裂缝监测数据,探讨了影响煤层气井压裂效果的主要因素,提出了以保证煤层气井压裂效果为前提且兼顾煤层地应力分布的压裂工艺优化方案。研究表明:压裂裂缝主缝长与煤层地应力的分布呈明显负相关;地应力的高低与压裂液量、施工泵压呈正相关,与砂比呈负相关;压裂设计时,压裂施工参数宜在优化区间内取值压裂效果较佳,在不同应力分布区应适当调整压裂液量、砂比类参数、注砂量和施工泵压。

In order to optimize fracturing technology of coalbed methane well, taking the Southern Qinshui Basin as an example, the major affecting factors on fract uring effect of coalbed methane wells were discussed. The fracturing optimization scheme was put forward according to fracturing effect and the distribution of ground s tress based on the engineering data and the monitoring data of crack. The results suggest that main fractured length was obviously negative correlated with the distribu tion of ground stress. The ground stress is positive correlated with the volume of fracturing fluid and pumping pressure, was negative with sand concentration. The good fracturing effects can be obtained when the construction parameters of fracturing were conducted with a value in the optimized variation interval during the fracture opti mization design. The volume of fracturing fluid, sand concentration and injected sand volume, pumping pressure should be adjusted appropriately in the different groun d stress distribution area.

国家自然科学基金资助项目(41302129,41330638,41272154,41172138,41272171)；山西省煤层气联合研究基金资助项目(2012012008)；安徽理工大学人才引进基金资助项目(112241)；