速度管柱排水采气工艺效果及影响因素分析

Analysis on the effect and influence factors of gas recovery process of velocity tube column

针对川西气田单井产量低、投产管柱管径大,无法满足生产井连续带液的难题,优选出井筒气液滑脱、积液严重甚至水淹等共30口井开展速度管柱排水采气工艺,实施后,气井自身临界携液流量降低幅度67.11%,提高气井连续带液能力,产量平均月递减率降低5.47%。同时,通过对单井效果分析表明,速度管柱工艺效果主要受到地层能量、井筒气液滑脱及积液程度、井底污染情况等因素的影响。

The single well output of the West Sichuan gas field is low, the diameter of the pipe string is large, the production wells can not meet the problem, the optimization of the Dei gas liquid detachment, effusion serious and even water flooding, and so on a total of 30 wells to carry out the drainage gas recovery technology, after the implementation of the gas well, the critical liquid carrying flow rate of 67.11%, improve the gas well with liquid capacity, the average monthly decline rate of 5.47%. At the same time, through the analysis of the single well effect, the results show that the process of the speed of the pipe string is mainly influenced by the formation energy, the gas liquid slippage, the fluid level and the pollution of the well.