本文選題：耐油低張力泡沫 + 起泡劑��； 參考：《東北石油大學(xué)》2015年碩士論文

【摘要】：本文開展了耐油三元復(fù)合泡沫劑篩選及性能評價的室內(nèi)實驗研究,通過實驗優(yōu)選出適合較高含油飽和度非均質(zhì)儲層調(diào)驅(qū)的三元復(fù)合泡沫體系,在利用泡沫的高視粘度和選擇性封堵性能擴(kuò)大波及體積的同時,通過低張力活性劑的高界面活性提高體系的洗油效率,從而大幅度提高聚驅(qū)后非均質(zhì)儲層的原油采收率。首先,采用DFA100動態(tài)泡沫分析儀,從10種常用起泡表面活性劑中篩選出含油條件下起泡性能良好、泡沫穩(wěn)定性強(qiáng)的十二烷基羥丙基磷酸酯甜菜堿(簡稱起泡甜菜堿)和氟碳101005。通過對比不同表面活性劑的界面擴(kuò)張模量、剪切模量、界面粘度等參數(shù)研究起泡劑性能與界面流變性的關(guān)系。其次,將篩選出的耐油起泡劑分別與驅(qū)油劑石油磺酸鹽、重烷基苯磺酸鹽,堿劑NaOH、Na2CO3復(fù)配成三元復(fù)合體系,通過泡沫性能評價實驗和界面張力評價實驗篩選出同時具備良好起泡性能和低界面張力的耐油低張力泡沫配方:0.15%起泡甜菜堿+0.15%重烷基苯磺酸鹽+1.2%NaOH+1500mg/L聚合物。再次,在人造非均質(zhì)巖心中進(jìn)行泡沫體系驅(qū)油效果評價,并在不同變異系數(shù)、不同含油飽和度下對比分析泡沫體系注入壓力、采收率、含水率數(shù)據(jù),評價泡沫體系驅(qū)油性能。實驗結(jié)果表明,耐油低張力泡沫體系提高采收率幅度大于20%,且隨著變異系數(shù)增加,泡沫驅(qū)采收率增大,泡沫體系對非均質(zhì)儲層具有很好的適應(yīng)性;巖心中殘余油飽和度在20%-50%范圍內(nèi),泡沫體系驅(qū)油效果理想,體現(xiàn)出良好的耐油性能。最后,通過不同滲透率級差雙管并聯(lián)巖心模型驅(qū)油實驗,研究泡沫體系滲流能力和驅(qū)油效果,得出泡沫體系在滲透率級差小于10:1時驅(qū)油效果較好。
[Abstract]:In this paper, laboratory experiments on the screening and performance evaluation of oil resistant ternary composite foams are carried out. The ternary composite foams suitable for high oil saturation heterogeneous reservoirs are selected through experiments. While using the high apparent viscosity of foam and selective plugging performance to expand the sweep volume, the oil washing efficiency of the system was improved through the high interfacial activity of low tension active agent, thus the oil recovery of heterogeneous reservoir after polymer flooding was greatly improved. Firstly, using the DFA100 dynamic foam analyzer, the foaming properties of dodecyl hydroxypropyl phosphate betaine and fluorocarbon 101005, which have good foaming performance and strong foam stability, were selected from 10 kinds of commonly used foaming surfactants. The relationship between the properties of the foaming agent and the interfacial rheology was studied by comparing the interfacial expansion modulus, shear modulus and interfacial viscosity of different surfactants. Secondly, the oil resistant foaming agent was mixed with petroleum sulfonate, heavy alkylbenzene sulfonate and NaOHfN Na 2CO 3, respectively, to form a ternary composite system. Through the foam performance evaluation experiment and the interfacial tension evaluation experiment, the oil-resistant low-tension foam formula: 0.15% betaine 0.15% heavy alkylbenzene sulfonate 1.2%NaOH 1500mg/L polymer with good foaming performance and low interfacial tension was selected. Thirdly, the flooding effect of foam system is evaluated in artificial heterogeneous core, and the injection pressure, oil recovery and water cut data of foam system are analyzed under different variation coefficient and different oil saturation to evaluate the oil displacement performance of foam system. The experimental results show that the oil recovery of oil resistant and low tension foam system is more than 20 percent, and with the increase of coefficient of variation, the oil recovery of foam flooding increases, and the foam system has a good adaptability to heterogeneous reservoirs. In the range of 20%-50% residual oil saturation in the core, the foam system has ideal oil displacement effect and good oil resistance. Finally, through the experiments of different permeability differential two-pipe parallel core model flooding, the percolation ability and oil displacement effect of foam system are studied. It is concluded that the foam system has a better displacement effect when the permeability difference is less than 10:1.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE357.46

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 王其偉;;孤島中二區(qū)低張力泡沫驅(qū)油體系性能研究[J];西南石油大學(xué)學(xué)報(自然科學(xué)版);2012年05期

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本文編號：1978627