煤矿安全2017，Vol.48Issue(11)：5-8,4.DOI:10.13347/j.cnki.mkaq.2017.11.002
碎软煤层顶板岩层水平井大尺寸穿层压裂物理模拟试验研究
Study on Physical Simulation Test of Cross-strata Hydraulic Fracturing for Big Size Horizontal Well in Roof Strata of Broken Soft Coal Seam
摘要
Abstract
Based on the technical assumption of multi-stage hydraulic fracturing for horizontal well in coal seam roof strata applied in coalbed methane development,a similar physical model for characterizing fracturing horizontal well in coal seam roof strata is constructed.The propagation characteristics of fractures generated from horizontal wells in coal seam roof strata through the multiple experiments of the real three axle fracturing physical simulation under the condition of surrounding stress,and especially,the possibility of fractures that propagate into coal seam were researched in detail.The results shows that fractures initiated from horizontal wells in coal seam roof strata can grow towards and into coal seam under some conditions such as reasonable placement of horizontal well in coal seam roof strata and a certain pumping rate.The simulation experiment research provides a laboratory demonstration for practicability of the technology of multi-stage hydraulic fracturing and horizontal wells in roof strata of broken soft and low permeable coal seam,and provides guidance for the optimization of horizontal well placement in coal roof strata.关键词
碎软煤层/顶板岩层/水平井/分段水力压裂/物理模拟/煤层气开发Key words
broken and soft coal seam/roof strata/horizontal well/multi-stage hydraulic fracturing physical simulation/CBM development分类
矿业与冶金引用本文复制引用
巫修平..碎软煤层顶板岩层水平井大尺寸穿层压裂物理模拟试验研究[J].煤矿安全,2017,48(11):5-8,4.基金项目
“十三五”国家科技重大专项资助项目(2016ZX05045002-004) （2016ZX05045002-004）
中煤科工集团西安研究院科技创新基金资助项目(2015XAYMS37) （2015XAYMS37）
