天然气工业2009，Vol.29Issue(10)：59-61,3.DOI:10.3787/j.issn.1000-0976.2009.10.018
LG地区氮气钻井实践与认识
Practices and experiences from nitrogen drilling in the LG area
摘要
Abstract
The application of nitrogen drilling at the highly abrasive gas-bearing Xujiahe Formation of the LG area is critical for the ROP improvement, reservoir protection, prevention of downhole explosion, and for further exploration and development in this area. Hereby, according to the practices and experiences from the nitrogen drilling in this formation on many wells, we summarized the equipments used, the technical challenges encountered, and the measures adopted as follows: 1) the drilling rate should be controlled to be over 5 min/m in order to avoid sticking; 2) if serious sticking occurs, work the drill string at a controlled pull force, and keep circulating continuously till no obstruction in the annulus, then readjust the work distance of the drill string in order to free it. The successful application of nitrogen drilling at the Xujiahe formation has proved that nitrogen drilling can not only improve the ROP effectively, but avoid downhole fires or explosions when drilling through gas zones with air.关键词
深井/超深井/晚三叠世/氮气钻井/地层/损害/机械钻速Key words
deep well/ultra-deep well/nitrogen drilling/formation damage/ROP/exploration/formation pressure/air drilling/natural gas/downhole fire or explosion分类
能源科技引用本文复制引用
韩朝辉,张建斌,贾军喜,王军闯,邓凯..LG地区氮气钻井实践与认识[J].天然气工业,2009,29(10):59-61,3.基金项目
本文受到中国石油天然气集团公司重点科研项目"高效低成本钻井配套新技术"的资助. （）
