石油钻采工艺Issue(2)：13-15,3.
煤层气水平井充气欠平衡钻井注气工艺研究
Study on gas injection technique of aerated underbalanced drilling for CBM Horizontal Wells
摘要
Abstract
Nowadays, aerated underbalanced drilling becomes one of the most commonly used techniques in coalbed methane drill-ing. It is difficult to satisfy the rock cuttings portability requirement and control the stability of bottom hole pressure, while controlling the gas injection pressure, rate, and volume. The pressure drop performance is obtained at the corresponding cave through numerical simulation by FLUENT software under different gas injection pressure, rate and volume. So a reasonable set of technical parameters are selected, which can guarantee the expected flow type to fulfill the rock portability requirements, and stabilize the bottom hole pres-sure during aerated underbalanced drilling. An analyzing model is built up through the real-time parameters from one well, and the gas injection pressure, rate and volume are optimized, following with the parameter varying rules. The results have some guidance to ensure drilling safety and optimize drilling operations.关键词
充气欠平衡/注气量/压力/气液两相流/数值模拟/工艺优化Key words
aerated UBD/gas injection volume/pressure/gas-liquid two-phase flow/numerical simulation/technique optimization分类
能源科技引用本文复制引用
龚才喜,梁海波,古冉..煤层气水平井充气欠平衡钻井注气工艺研究[J].石油钻采工艺,2013,(2):13-15,3.基金项目
“十二五”国家科技重大专项“大型油气田及煤层气开发--山西沁水盆地煤层气水平井开发示范工程”项目“煤层气水平井欠平衡钻井综合配套技术”子课题(编号:2010ZX05061)的部分研究成果 （编号:2010ZX05061）
