鄂北工区水平井提速提效技术探讨

Discussion on the Improvement of Drilling Speed and Efficiency for Horizontal Well in Northern Erdos Work Area

随着鄂北工区大牛地气田的持续建产,水平井规模应用已成为气田开发的重点技术。但由于地层岩性变化、可钻性差异,泥岩稳定性,低破裂压力层段漏失,钻井液润滑和携岩能力,岩屑床的清除,以及钻遇泥岩煤层发生坍塌掉块等问题和不可控因素,对水平井钻井提速提效产生了不利的影响。系统分析了影响水平井提速提效的"瓶颈"问题,提出较为完善的技术方案,以实现水平井施工安全、快速、高效钻进的目的。

Along with the sustainable construction and production in Daniudi gas field in Northern Erdos work area, the large scale application has become the major technology in gas field development. But because of the unfavorable factors of iithological changes, rock drillability differences, instability of mud stone and leakage in light fracture and low pressure res- ervoir ; the uncertain factors of lubrication performance of drilling fluid, cuttings carrying capacity and the removal of cutting bed ; as well as the collapsing block-falling in drilled mudstone coal seam and some others, there were still many difficulties to improve the drilling efficiency. Based on the systematically analysis on these bottlenecks, the technical schemes were put forward.