涪陵页岩气田钻井提速方案及实施效果分析

A Scheme for Drilling Rate Improving in Fuling Shale Gas and Its Implementation Effects Analysis

摘要:

在深入分析涪陵页岩气田制约钻井速度的因素的基础上，针对性地提出了钻井提速的方案，并进行了大量的现场应用。本文详细介绍了国民油井旋冲工具、水力振荡器、POB抗油基泥浆螺杆钻具的组成和技术原理。阐述了以上3种工具在涪陵区块的应用效果和优势，并提出了使用中存在的不足和应改进的技术问题。这些工具的实施效果表明，国民油井提出的钻井提速方案是切实可行的，对该区域后期优快水平井钻井工艺的选择具有指导意义。

Abstract:

Based on the in-depth analysis on the factors that restrict the drilling rate in Fuling shale gas field, National Oilwell Varco put forward a scheme aiming at improving the drilling efficiency in this area. A large number of field practices based on this scheme have been carried out so far. This paper gave a full description of the assembly of NOV-made drilling tools of rotary impactor, hydraulic oscillator and POB（power-plus oil-based mud） downhome motor as well as the related technical principles. The performances and advantages of these tools in the application in Fuling block are elaborated comprehensively and some technical shortages are presented. The implementation effects show that the drilling rate improving scheme of NOV is practical and has important guiding significance for the selection of drilling technology in the late stage of the optimized and fast horizontal well drilling.