【摘要】：為了研究泡沫體系在吉林油田三個不同區(qū)塊地層條件下能否發(fā)揮作用,首先使用氣流法和油水界面張力測量方法分別探討了溫度和礦化度對不同類型表面活性劑產(chǎn)生泡沫的宏觀性能性能和洗油能力的影響,并通過測量三輪巖心動態(tài)吸附后每一階段采出液的泡沫性能分析不同體系在不同儲層中吸附特點;再次,測定四種運移距離下采出液的泡沫性能,定量分析泡沫體系吸附后的有效作用距離,并進行單管及雙管并聯(lián)巖心流動實驗,測定其調(diào)驅(qū)流動能力;最后,采用五種段塞組合方式進行雙管并聯(lián)交替注入驅(qū)油實驗,分析高、低滲透率巖心壓力和流量變化規(guī)律,測定其封堵及驅(qū)油效果,并明確段塞大小、組合方式及交替次數(shù)。結(jié)果表明,針對三個目標區(qū)塊條件,通過測量泡沫綜合指數(shù)和界面張力能夠從9種泡沫體系篩選出高封堵泡沫體系和高洗油泡沫體系各2種。分析表明,隨著溫度的升高,泡沫液膜內(nèi)部層化膠束結(jié)構(gòu)在更薄的厚度停止分層過渡,礦化度的增加給泡沫膜內(nèi)膠束周圍的雙電層增加了粒子屏蔽,導致了膠束的有效體積分數(shù)減少,泡沫性能下降。經(jīng)過多輪次巖心吸附后,帶有氟碳表面活性劑的泡沫體系每次吸附后泡沫性能均勻下降且下降幅度較小,而以碳氫鏈為疏水基的表面活性劑經(jīng)一次吸附后泡沫性能下降明顯;石油磺酸鹽和重烷基苯磺酸鹽在吸附二次后界面張力有明顯上升,而甜菜堿型表面活性劑在吸附三次后依舊保持較低的界面張力。四種運移距離下的泡沫性能評價表明,十二烷基硫酸鈉和氟碳型表面活性劑復(fù)配體系在新木146、紅崗高臺子、大老爺府區(qū)塊的有效作用距離分別為80%、60%、60%;低張力甜菜堿型泡沫體系在三個區(qū)塊的有效作用距離分別為80%、80%、60%。巖心滲透率越低,油層溫度和水質(zhì)礦化度越高,有效作用距離變短。巖心流動實驗結(jié)果表明,在三個區(qū)塊的地質(zhì)條件下,實驗所選用的兩種泡沫體系的封堵能力與不同因素相關(guān)性大小由高到低排序為:巖心滲透率、溫度、礦化度。雙管并聯(lián)交替注入驅(qū)油實驗結(jié)果表明,將高洗油和高封堵泡沫體系通過段塞組合方法,優(yōu)化段塞大小和注入方式,能夠得到三個區(qū)塊分別達到最高采收率時各自的驅(qū)替方案,低滲巖心泡沫驅(qū)提高采收率范圍在17.1%~10.6%�；|(zhì)巖心滲透率越小,泡沫驅(qū)提高采收率幅度越低。
[Abstract]:In order to study whether the foam system can play a role in the formation conditions of three different blocks in Jilin Oilfield, Firstly, the effects of temperature and salinity on the macroscopical properties and oil washing ability of different types of surfactants were studied by using the air flow method and the oil-water interfacial tension measurement method, respectively. The foam characteristics of different systems in different reservoirs were analyzed by measuring the foam properties of the liquid produced at each stage after three rounds of dynamic adsorption of cores. Thirdly, the foam properties of the produced fluids under four migration distances were measured. Quantitative analysis of effective action distance after adsorption of foam system, flow experiment of single tube and double pipe parallel core, determination of its flow capacity of adjusting flooding, finally, using five kinds of slug combination mode to carry out double pipe parallel injection oil displacement experiment, The changes of pressure and flow rate in high and low permeability cores are analyzed, the plugging and oil displacement effects are determined, and the size of slug, combination mode and alternate times are determined. The results show that, according to the three target block conditions, the high plugging foam system and the high washing oil foam system can be selected from 9 kinds of foam systems by measuring the foam synthesis index and interfacial tension. The analysis shows that with the increase of temperature, the laminated micelle structure in the liquid foam film stops the delamination transition at the thinner thickness, and the increase of the salinity increases the particle shielding for the double electric layer around the micelle in the foam film. As a result, the effective volume fraction of the micelles is reduced and the foam properties are decreased. After several rounds of core adsorption, the foam properties of the foam system with fluorocarbon surfactants decreased uniformly after each adsorption, but the foam properties of the hydrophobic surfactants with hydrocarbon chain as hydrophobic base decreased obviously after one adsorption. The interfacial tension of petroleum sulfonate and heavy alkylbenzene sulfonate increased obviously after the second adsorption while the interfacial tension of betaine type surfactant remained low after three times adsorption. The foam performance evaluation at four migration distances showed that the composite system of sodium dodecyl sulfate and fluorocarbon surfactants was used in Xinmu 146Honggang Gaotaizi. The effective action distance of the Dalaoyefu block is 80% and the effective range of the low tension betaine foam system in the three blocks is 80% 80% and 60%, respectively, and the effective action distance of the low tension betaine type foam system in the three blocks is 80%, 80% and 60%, respectively. The lower the core permeability, the higher the reservoir temperature and water quality salinity, and the shorter the effective range. The results of core flow experiments show that under the geological conditions of the three blocks, the plugging ability of the two kinds of foam systems selected in the experiment is in the order of high to low correlation from high to low: core permeability, temperature, and salinity. The experimental results show that the displacement schemes of the three blocks can be obtained by optimizing the slug size and injection mode by combining the high wash oil and high plugging foam system with the slug combination method. The range of oil recovery increased by low permeability core foam flooding is 17.1% 10.6%. The smaller the permeability of matrix core, the lower the range of enhanced recovery by foam flooding.
【學位授予單位】：東北石油大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TE39

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