石油钻采工艺2012，Vol.34Issue(4)：93-95,3.
沁水盆地煤层气水平井井筒煤粉迁移及控制
Coal dust migration and treatment for coalbed methane horizontal wells in Qinshui Basin
摘要
Abstract
Coal dust in CBM horizontal wells usually leads to reservoir damage and pump sticking, resulting in serious production decreasing of coalbed methane. The transportation characteristics of coal dust under the conditions of different pressure differentials in wellbore was studied through physical simulation experiments. The result indicates that the coal dust and water two-phase flow is a laminar flow, and the relationship between coal dust migration velocity and pressure drop is non-linear with transportation velocity increasing as pressure drop increasing. There is a critical startup pressure gradient for coal dust starting to flow, and the movement finally achieves a steady state once the pressure gradient reaches a certain level. The control method of coal dust treatment was discussed on the basis of analyzing coal dust forming mechanisms, physical simulation experimental results and field production experience.关键词
煤层气水平井/煤粉/迁移/控制Key words
CBM horizontal well/ coal dust/ transfer/ treatment分类
能源科技引用本文复制引用
曹立虎,张遂安,石惠宁,白建梅,王欢,朱伟..沁水盆地煤层气水平井井筒煤粉迁移及控制[J].石油钻采工艺,2012,34(4):93-95,3.基金项目
国家科技重大专项"山西沁水盆地煤层气水平井开发示范工程"(编号:2011ZX05061) （编号:2011ZX05061）
"深煤层储层物性及地质因素研究"(编号:2011ZX05042-001-003) （编号:2011ZX05042-001-003）
"高产水/弱含水煤储层特性排采动态预测技术"(编号:2011ZX05034-003). （编号:2011ZX05034-003）
