速度管采气工艺在大牛地气田水平井的应用

发布时间：2018-05-29 01:29

本文选题：大牛地气田 + 水平井　；参考：《中外能源》2016年11期

【摘要】：大牛地气田水平井普遍具有低压、低产、携液能力差及井筒压力损失大的特点,严重制约着气井后期的稳定生产。速度管采气工艺是目前水平井应用的主要排水采气工艺之一,其工作原理是利用小直径连续油管充当速度管柱,下入深度至气井造斜点以上50m,减小流体的流动面积,提高气体的流速,从而有效预防井筒积液。阐述了速度管采气工艺的工艺原理、作业过程,并根据气井临界携液理论和管流压降模型,优选出■38.1mm速度管,可经济有效地满足气田中后期生产要求。综合分析速度管下入前后气井产量、压力、生产时率、助排措施等变化情况,建立速度管现场应用效果评价准则。通过对10口速度管水平井下入前后的生产情况进行对比分析表明,水平井下入速度管后总体排水采气效果较好。此外,速度管可实现连续冲砂,且冲砂深度可到水平段,恢复气井生产后增产效果明显。
[Abstract]:The horizontal wells in Daniudi gas field are generally characterized by low pressure, low production, poor liquid carrying capacity and large wellbore pressure loss, which seriously restrict the stable production in the later stage of gas wells. The velocity tube gas recovery process is one of the main drainage gas production techniques used in horizontal wells at present. Its working principle is to use small diameter continuous tubing as the speed pipe string, and to reduce the fluid flow area by going down to the depth of 50 m above the gas well diagonal point. Increase the flow rate of gas, thus effectively prevent wellbore fluid accumulation. This paper expounds the technology principle and operation process of velocity tube gas recovery technology, and according to the theory of critical fluid carrying in gas well and the pressure drop model of pipe flow, the 38.1mm speed tube is selected to meet the requirements of gas field production in the middle and late stage economically and effectively. The changes of gas well output, pressure, production time rate and drainage aid measures before and after the velocity tube entering are comprehensively analyzed, and the evaluation criteria for the field application effect of the velocity tube are established. By comparing and analyzing the production situation of 10 velocity tube horizontal wells before and after entering the horizontal wells, it is shown that the overall drainage and gas recovery effect of the horizontal wells is good after entering the velocity tubes. In addition, the speed tube can realize continuous sand washing, and the depth of sand washing can reach the horizontal section, and the effect of increasing production after recovery of gas well production is obvious.
【作者单位】：中国石化华北油气分公司采气一厂;
【分类号】：TE377

【相似文献】