浅谈大斜度井、水平井打捞工艺

Discussion on fishing technology in highly deviated wells and horizontal wells

随着钻井技术水平的不断提高和油气田开采进入后期,大斜度井、水平井的应用越来越广泛。它在提高了采收率的同时,也造成了修井作业过程中的一些复杂情况。由于井眼轨迹的特殊性,致使在大斜度段、水平段的落物、工具处于套管的低部位,相对于直井来说,打捞工艺困难很大,是一个难点。本文通过对大斜度井、水平井井身结构特点分析和施工技术难度分析,简单介绍了打捞工具及管柱结构的优化选择,结合现有的打捞技术,对大斜度井、水平井打捞工艺进行初步探讨。

With the rising improvement of drilling technology and the development of oil and gas exploitation in later stage, highly deviated wells and horizontal wells are used widely. Although they can improve oil and gas recovery, they results in some com-plicated conditions during workover operations. Compared with vertical wells, these wells are found to be difficult to deal with fishing operations. Through analyzing their hole structure and technical difficulties in construction, this paper briefly introduces the optimiza-tion and selection of fishing tools and pipe-string structure and combines with current fishing technology to give a preliminary discus-sion on the fishing process of highly deviated wells and horizontal wells.