充气泡沫泥浆治理长孔段漏涌地层施工工艺探讨

Discussion of Construction Technology for Leakage Formations Treatment with Aerated Mud and Foam Mud

摘要:

针对长孔段漏涌地层及松散破碎等复杂地层，提出以泡沫泥浆或充气泥浆平衡地层压力的钻进方法，兼备护壁和防止冲洗液漏失的双重作用，实现连续堵漏和护壁，减少堵漏时间，有利于提高钻探效率，降低成本。对干旱缺水地区、全漏失地层钻探施工拓展了新的技术手段。

关键词:泡沫泥浆;充气泥浆;平衡地层压力;漏涌地层;松散破碎地层;钻探效率

Abstract:

According to the complicated long-section well kick & circulation loss, loose and broken formations, the drilling method with foam mud or aerated mud is put forward to balance the formation pressure, which has dual role on wall protection and flushing fluid leakage prevention to realize continuous plugging and wall protection, and is helpful to improve drilling efficiency and reduce cost. This is a new technical means developed for drilling construction in water deficient area and full loss stratum.

Key words:foam mud; aerated mud; formation pressure balancing; well kick and circulation loss interbedding; loose and broken formation; drilling efficiency