摘要
气藏地层出水、作业压井 ,都可能造成气井的井筒积液停产 ,而长时间的积液浸泡往往会对气层造成极大的污染和伤害。因此 ,快速有效地排液复产 ,是保持气井产能、高效开发气田的关键。文章在简要对比分析液氮、气举、化排和机抽等各种常规排液复产工艺优缺点的基础上 ,提出了一种操作方便、复产快捷、长期有效的排液复产新方法———井间互联井筒激动排液复产工艺。该工艺通过一次性改造站内和井口流程 ,实现集气站内各井高压进站管线的永久互联。当气井发生积液停产时 ,切换站内井间互联流程 ,利用气藏内部高压气井的井口高压 ,将停产井井筒积液的一部分暂时压回地层 ,降低井筒液柱高度和回压 ,并通过开井激动 ,提高气井的生产压差和自喷带液能力 ,使气井快速排除井筒积液并恢复生产。经文 2 3气田近 30井次的试验和应用 ,发挥了巨大的作用 ,使气井的排液复产周期由 3～ 8d缩短到现在的 3～ 5h ,有效地降低了气井复产成本 。
The formartion water production and kill job both probably cause the off production of gas wells due to liquid loading in borehole and the long term liquid soak always causes serious contamination and damage to gas reservoirs. For this reason ,quickly and effectively making drainage and restoring production is the key to the maintenance of gas well's productivity and to the efficient development of gas field. On the basis of the brief comparative analysis of the advantages and shortages of various conventional technologies for restoring production by drainage,such as liquid nitrogen, airlift and chemically and mechanically water withdrawal,etc., a new method for restoring production by drainage—an interwell interconnecting wellbore excitation method, is proposed. The method has such advantages as convenient operation, quick effect and long effective period. This technology lies in realizing the permanent interconnection of the high pressure incoming pipelines of every well in gas gathering station through reforming the flowsheet of both station and wellhead. When off production occurs due to liquid loading, the interconnecting flowsheet in the station is switched over and a part of the liquid in dead wells′borehole is temporarily pressed back in the formation with the aid of the wellhead high pressure of high pressure gas wells to reduce the liquid column height and back pressure in wellbore, and then, through opening the well and making excitation, the producing pressure drawdown and liquid carrying capacity of gas wells are raised, making the liquid loading in gas wells quickly eliminated and the production restored soon. Through the test and application of this method for about 30 times/well in Wen 23 gas field, a very good result was obtained, making the cycle of drainage and production restoration shortened from 3～8 days to 3～5 hours, effectively reducing the cost in restoring gas production and maintaining the productivity of gas wells.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2001年第1期88-90,共3页
Natural Gas Industry
关键词
气井
排液复产
天然气开采
积液停产
井间干挠
井筒流动
Natural gas, Gas production, Interwell interference, Well bore flow, Discharge fluid, Increase productivity
