天然气水合物试采对接井卡钻事故分析与处理

Analysis and Processing of Drill Pipe Sticking in Gas Hydrate Trial-produce Horizontally Butted Well

2016年,在青海木里盆地顺利完成了陆域天然气水合物试采工作,首次将对接井技术应用于天然气水合物试采,取得了显著的效果。钻井区域复杂地层给对接井钻井施工带来了极大的难度与风险,钻井过程中多次出现卡钻现象,本文主要介绍了天然气水合物试采对接井钻井过程中遇到的卡钻事故,并对主要卡钻原因进行了详细分析,给出了相应的解卡措施。

In 2016, land gas hydrate trial-produce has been carried out successfully in Muli basin, Qinghai. It is the first time that the technology of horizontally butted well has been applied in gas hydrate trial-produce and remarkable results have been achieved. Complex stratum of drilling area brought great difficulty and risk to the horizontally butted well drilling. Drill pipe sticking appeared several times during the drilling process, this paper mainly introduces and analyzes in detail on the main reason of drill pipe sticking with the corresponding jam release methods.