吐哈油田防漏工艺技术

Lose prevention and shut-off techiques in Tuha oilfield

介绍了吐哈油田防漏工艺技术,该技术是针对吐哈井漏特点和原因以及几年来防漏堵漏的实践而研究摸索出的一整套技术。它包括加FC提高地层耐压能力,合理降低泥浆密度,改善泥浆流变性为主的防漏工艺技术和以随钻、胶凝、桥塞法为主的堵漏工艺技术。该技术在现场应用中取得良好的效果和显著的经济效益。特别是在1991年全面推广应用后效果更为显著,万米漏失率由1990年的4.8次/万m下降到2.20次/万m,堵漏一次成功率由89.7％提高到92.5％。

In accordance with the characteristrics and causes of leakage in Tuha oilfield, this paper puts forward the lose prevention techniques, such as increasing pressure-resistant capacity of formation by aolding FC, decreasing mud density properly, improving mud rheological property as well as using MWD, gelation and bridge Plug method. The lose rate decrease from 4.8times/10~4m in 1990 to 2.20times/10~4m in 1991, and the successful shut-off percentage increase to 92.5％ from 89.7％.