本文選題：起泡劑　切入點：返排率　出處：《西南石油大學》2015年碩士論文

【摘要】：隨著油田提高采收率的越來越廣泛的應用,相當數(shù)量的油井都采用不同的壓裂技術(shù)進行增產(chǎn),然而隨之帶來的環(huán)境問題也引起人們的廣泛關(guān)注。本文以提高川渝及蘇里格地區(qū)壓裂酸化作業(yè)后工作液返排效率為目的,以工作液對地層的傷害最小化為條件,研制了一種具有較強起泡和穩(wěn)泡能力的起泡劑助排劑。通過實驗復配出了一種復合型起泡助排劑,能夠進一步降低壓后殘液表面張力、界面張力,提高殘液的返排能力。本文研究的室內(nèi)合成起泡助排劑界面張力明顯降低,起泡能力也優(yōu)于現(xiàn)有助排劑,各項性能均能滿足指標要求,并接近或優(yōu)于國內(nèi)同類領先產(chǎn)品。本研究在室內(nèi)評價了起泡助排劑的表面張力、熱穩(wěn)定性等,并設計實驗評價了其助排能力。研究表明起泡助排劑與常用壓裂酸液體系如SD壓裂液和膠凝酸等能相容配伍,對巖芯不產(chǎn)生新的損害,對工作液的流變性和濾失性不產(chǎn)生新影響,起泡助排劑在壓裂液和酸液中具有很強的降低表面張力的能力,同時能提高工作液返排量。在現(xiàn)場試驗運用時將起泡助排劑加入工作液中混合均勻后,取配制好的基液進行性能測試,最終表明該起泡助排劑具有良好的壓后返排及增產(chǎn)效果。
[Abstract]:With the increasing application of increasing oil recovery in oil fields, a considerable number of oil wells adopt different fracturing techniques to increase production. However, the environmental problems caused by these problems have attracted wide attention. In order to improve the efficiency of fluid reflux after fracturing and acidizing operation in Sichuan, Chongqing and Sulige areas, and to minimize the damage caused by the working fluid to the formation, the purpose of this paper is to minimize the damage caused by the working fluid to the formation. A kind of foaming agent with strong foaming and foam stabilizing ability was developed. A compound foaming aid was prepared by experiments, which can further reduce the surface tension and interfacial tension of the residual liquid after pressing. In this paper, the interfacial tension of the indoor synthetic foaming aid is obviously reduced, the foaming ability is also superior to the existing drainage aid, and all the properties can meet the requirements of the index. In this study, the surface tension, thermal stability and so on of foaming aid were evaluated in laboratory. The experimental results show that foaming and drainage aids are compatible with common fracturing acid systems, such as SD fracturing fluid and gelling acid, which will not cause new damage to the core. It has no new influence on the rheology and filtration of the working fluid. The foaming aid has a strong ability to reduce the surface tension in fracturing fluid and acid. At the same time, it can increase the amount of back discharge of working liquid. After adding foaming aid into working fluid and mixing well in the field test, the properties of the prepared base liquid are tested. Finally, the result shows that the foaming aid has good effect of back discharge after pressing and increasing production.
【學位授予單位】：西南石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE357.2

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