水平井速度管柱排水采气技术研究与试验  

Research and Test on Water Drainage Gas Recovery Velocity String Technology for Horizontal Well

作　　者：赵彬彬[1,2] 李丽[1,2] 白晓弘[1,2] 汪雄雄[1,2] 付悦[3] 樊莲莲[1,2] 

机构地区：[1]长庆油田分公司油气工艺研究院 [2]低渗透油气田勘探开发国家工程实验室 [3]中国石油集团钻井工程技术研究院江汉机械研究所

出　　处：《石油机械》2018年第1期88-91,99,共5页China Petroleum Machinery

基　　金：中国石油天然气股份有限公司专项"长庆油田5000万吨持续高效稳产关键技术研究与应用"(1602-1-3)

摘　　要：苏里格致密气田水平井主体采用不动管柱压裂工艺,导致井筒中工具多,加之井斜大,使得泡沫排水、柱塞气举和提产带液等工艺无法有效实施,前期开展的速度管柱排水采气试验效果不佳。针对该技术难题,利用已有直井模型和新建的斜井段模型计算出了水平井最易积液的位置,明确了连续管最佳下入深度,研发了适合水平井的双重密封悬挂器,并专门设计了内嵌式堵塞器,成功解决了连续管在大斜度井段无法带压下入的问题。速度管柱排水采气试验中,油套压差显著降低,产气量增加0.54×10~4m^3/d,增幅为80%;产水量增加0.4 m^3/d,增幅为90%,排水采气效果显著。水平井速度管柱的成功应用不仅解决了该类井的排水采气问题,同时也为其他因井斜大导致工艺措施受限的问题提供了一种新的解决途径。The fracturing technology without pulling string adopted in horizontal well in Sulige tight gas field results in large number of tools used in the wellbore, in addition, high well inclination makes the foam drainage, plunger gas lift and production increment and liquid carrying technology not be effectively implemented. The results of drainage gas production test of velocity string were poor. To address the issue, the location that water accumula-tion is most easily occurred in horizontal well has been identified using existed vertical well model and the newly de-veloped inclined well section model. The optimal running depth of coiled tubing has been determined. The dual seal hanger for horizontal well has been developed, and the embedded plug has been specifically designed, thus successfully solving the coiled tubing running under pressure in the highly deviated well section. The water drainage gas recovery test of velocity string has been conducted. The tubing and casing pressure has been significantly re-duced with great effect of water drainage and gas production. The gas production increased by 0. 54 X l〇4 m3/d with the increase rate of 80%. The water production increased by 0. 4 m3/d with the increase rate of 9 0 % . The successful application of the velocity string for horizontal well has not only solved the problem of water drainage and gas production in similar kind of well, but also provided a new solution for other operation problems caused by high well inclination.

关 键 词：致密气田 水平井 排水采气 速度管柱 

分 类 号：TE377[石油与天然气工程—油气田开发工程]