發(fā)布時(shí)間：2018-02-03 13:05

  本文關(guān)鍵詞： 微泡沫驅(qū) 穩(wěn)定性驅(qū)油機(jī)理 波及體積 高溫高鹽油藏　出處：《油田化學(xué)》2017年01期 　論文類型：期刊論文

【摘要】：針對普通泡沫在高溫高鹽油藏中穩(wěn)定性弱、驅(qū)油效果差的問題,采用將氣體和起泡劑溶液(5000 mg/L甜菜堿表面活性劑SL1+5000 mg/L黃原膠XG)同時(shí)注入填砂管泡沫發(fā)生器的方法制備了一種穩(wěn)定性強(qiáng)、尺寸細(xì)微的微泡沫體系,即黃原膠穩(wěn)定的微泡沫。通過微觀可視化模型對比了普通微泡沫(5000 mg/L SL1)與黃原膠穩(wěn)定的微泡沫在原油存在條件的下穩(wěn)定性差異,分析了驅(qū)油機(jī)理,借助填砂管模型對比了兩種微泡沫的驅(qū)油性能。微觀實(shí)驗(yàn)結(jié)果表明:氣泡液膜中吸附的黃原膠增加了微泡沫液膜厚度,有效抑制了氣泡聚并和液膜排液,使黃原膠穩(wěn)定的微泡沫具有更強(qiáng)的穩(wěn)定性和耐油能力。微泡沫越穩(wěn)定,微觀波及體積越高、采油效率越高。微泡沫主要的驅(qū)油機(jī)理為直接驅(qū)替機(jī)理、乳化機(jī)理、同向液膜流動(dòng)機(jī)理、逆向液膜流動(dòng)機(jī)理。物模實(shí)驗(yàn)結(jié)果表明,在160 g/L礦化度、90℃條件下,黃原膠穩(wěn)定的微泡沫驅(qū)的采收率可在水驅(qū)基礎(chǔ)上提高22.9%,比普通微泡沫驅(qū)高15.2%。
[Abstract]:In order to solve the problem that the stability of common foam in high temperature and high salt reservoir is weak and the oil displacement effect is poor. The xanthan gum of gas and foaming agent solution of 5000 mg/L betaine surfactant SL1 5000 mg/L was used. At the same time, a kind of stability was prepared by injecting sand pipe foam generator. Micro foam system of fine size. Through the microscopic visualization model, the difference of stability between ordinary microfoam 5000 mg/L SL1 and Xanthan Gum stabilized microfoam under the condition of crude oil existence was compared with that of xanthan gum stabilized microfoam. The oil displacement mechanism was analyzed and the oil displacement performance of two kinds of microfoam was compared with the sand filled pipe model. The microscopic experimental results showed that the adsorption of xanthan gum in the bubble liquid film increased the thickness of the microfoam film. It can effectively restrain bubble aggregation and liquid film efflux, so that xanthan gum stabilized microfoam has stronger stability and oil resistance. The more stable the microfoam, the higher the microcosmic sweep volume. The oil recovery efficiency is higher. The main oil displacement mechanism of microfoam is direct displacement mechanism, emulsification mechanism, codirectional liquid film flow mechanism, reverse liquid film flow mechanism. At 90 鈩，

本文編號：1487464