准噶尔盆地火成岩钻井提速难点与技术对策  

Difficulties in Igneous Rock Drilling in Dzungaria Basin and Technological Solutions

作　　者：赵洪山[1] 冯光通[1] 唐波[1] 曾敏[2] 

机构地区：[1]胜利石油管理局钻井工艺研究院 [2]胜利石油管理局石油开发中心

出　　处：《石油机械》2013年第3期21-26,共6页China Petroleum Machinery

基　　金：中国石油化工集团公司项目"胜利准噶尔盆地复杂深井优快钻井技术研究"的部分研究内容

摘　　要：针对准噶尔盆地火成岩地层钻井现状、地层特点以及钻井技术难点,开展了气体钻井、欠平衡/控压钻井、复合钻井、自动垂直钻井、井下减振增压破岩工具以及随钻封堵钻井液等多项提速技术适应性分析。分析结果表明,欠平衡/控压钻井技术通过精确控制井眼环空的钻井液柱压力剖面,能减少钻进过程中的岩屑压持效应以及起下钻期间环空循环压耗消失的影响,有利于火成岩地层的井壁稳定并提高机械钻速;气体钻井是解决火成岩地层机械钻速慢、井漏情况复杂的首选技术。建议针对不同火成岩区块开展井壁失稳机理研究,并尝试高效钻头配合井下减振增压破岩工具以提高火成岩地层机械钻速,进一步探索有效解决火成岩地层钻井提速难点的技术手段。In light of the drilling status quo, formation feature and drilling technological difficulties of the igneous rock formation in Dzungaria Basin, the adaptability analysis of several technologies was conducted, including gas drilling, underbalanee/pressure control drilling, compound drilling, automatic vertical drilling, downhole damping and boosting rock-breaking tool and plugging-while-drilling drilling fluid. The analysis shows that the underbalance/pressure control drilling technology＇ s precise control of pressure cross-section of drilling fluid in hole annulus can reduce the cuttings hold-down effect in the drilling process as well as the effect on annular circulation pressure loss during tripping. It is favorable to the well wall stability of igneous rock formations and improvement of rate of penetration. Gas drilling is the first and foremost technology to handle slow rate of penetration and complex lost circulation in igneous rock formations. It is suggested that research on well wall instability mechanism in different blocks of igneous rock should be conducted, and the technology for improving the penetration rate in igneous rock formations by means of high-efficiency bit combined with downhole damping and boosting rock-breaking tool should be tried.

关 键 词：准噶尔盆地 火成岩 井壁失稳 机械钻速 防斜快打 封堵技术 钻井难点 

分 类 号：TE242[石油与天然气工程—油气井工程]