【摘要】：針對(duì)水平井泡沫排液采氣各井段泡沫流型認(rèn)識(shí)不清,泡排工藝優(yōu)化困難的問題,以表面活性劑、水和空氣為實(shí)驗(yàn)介質(zhì),開展了水平井泡沫流型實(shí)驗(yàn)研究,根據(jù)泡沫的生成情況及氣體/泡沫的界面特征劃分了流型,繪制了泡沫流型圖,對(duì)比了表面活性劑加入前后流型圖的變化,分析了角度、兩相流流型對(duì)起泡的影響,提出了優(yōu)化建議。結(jié)果表明:水平段±5°以內(nèi)氣液分層明顯,起泡困難;垂直、傾斜段氣流速小于0.35 m/s時(shí)出現(xiàn)塞狀流,含氣率低,攪動(dòng)弱,起泡困難,是低壓低產(chǎn)水平井泡排效果不佳的主要原因;有利于起泡的條件為管斜角≥25°、氣流速≥0.35 m/s、流型呈現(xiàn)段塞流;建議采用懸掛式毛細(xì)管加注新工藝,注劑點(diǎn)位于管斜角25°處,解決泡排劑加注不到位的問題,并實(shí)現(xiàn)水平井全生命周期的排液。
[Abstract]:Aiming at the problems of unclear understanding of foam flow pattern and difficult optimization of foam drainage process in every well section of horizontal well foam drainage, an experimental study on foam flow pattern of horizontal well was carried out with surfactant, water and air as experimental medium. According to the formation of foam and the interface characteristics of gas / foam, the flow pattern is divided, the flow pattern diagram is drawn, the change of flow pattern before and after adding surfactant is compared, the influence of two-phase flow pattern on foaming is analyzed, and the influence of two-phase flow pattern on foaming is analyzed. The optimization suggestions are put forward. The results show that the gas-liquid stratification is obvious within the level of 鹵5 擄, and the foaming is difficult. When the velocity of gas in the inclined section is less than 0.35 m / s, the slug flow appears, the gas content is low, the stirring is weak and the bubble is difficult, which is the main reason for the poor efflux effect of low pressure and low production horizontal well. The favorable conditions for foaming are tube angle 鈮，

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