新型磺基甜菜堿二元體系特性評(píng)價(jià)
發(fā)布時(shí)間：2018-08-04 11:22
【摘要】：目前,二元復(fù)合驅(qū)及三元復(fù)合驅(qū)在國(guó)內(nèi)已進(jìn)入現(xiàn)場(chǎng)實(shí)驗(yàn)階段,由于三元復(fù)合驅(qū)技術(shù)存在采出液處理困難的難點(diǎn),損害地層等諸多負(fù)面因素沒有的良好解決方法,三元復(fù)合驅(qū)正在面臨工業(yè)化推廣的困難。聚合物表面活性劑二元體系突出體現(xiàn)了體系中無堿的特征,這以“治本”的形式直接有效減少對(duì)地層的傷害,并且在現(xiàn)場(chǎng)中的操作性更強(qiáng),在現(xiàn)在愈加的受到各大油田的歡迎。但不完美之處是,二元復(fù)合驅(qū)技術(shù)體系本身的特性會(huì)造成油水間界面張力的升高,在將界面張力達(dá)到超低的數(shù)量級(jí)(10-3mN/m)的技術(shù)上遇到困難,驅(qū)油效率的提高遭遇瓶頸。而在沒有堿參與的條件下,表面活性劑會(huì)被大量吸附,造成表面活性劑嚴(yán)重流失,再加上長(zhǎng)期以來,表面活性劑受到造價(jià)較高的限制,關(guān)于表面活性劑的研究開發(fā)也隨之都集中在新型表面活性劑的開發(fā)及適合開采條件配方的優(yōu)化篩選上。本文依照當(dāng)下形勢(shì),圍繞新型的磺基甜菜堿進(jìn)行界面張力及流動(dòng)性等評(píng)價(jià),并對(duì)新型磺基甜菜堿進(jìn)行吸附性試驗(yàn)以及實(shí)驗(yàn)室驅(qū)油物理模擬研究。研究表明:在聚合物分子量為700-950萬,聚合物濃度為500mg/L至2000 mg/L時(shí)和在聚合物分子量為1600-1900萬,聚合物濃度為500mg/L,新型磺基甜菜堿二元體系的界面張力能夠達(dá)到10-4mN/m數(shù)量級(jí)。新型磺基甜菜堿在二元、三元體系中和一元體系相比吸附量均低�？梢杂行П苊馔懂a(chǎn)時(shí)驅(qū)油劑的損失,有效保持體系濃度,在一定條件下適用于大慶油田的第三次開采。新型甜菜堿型表面活性劑基本不影響體系的彈性特性。聚合物濃度與聚驅(qū)的平穩(wěn)壓差及后續(xù)水驅(qū)平穩(wěn)壓差成正比,分子量越高,比值越大。同時(shí)分子量增加,壓差隨之相應(yīng)增加。阻力系數(shù)和殘余阻力系數(shù)與聚合物濃度、聚合物分子量成正比。經(jīng)過對(duì)非均質(zhì)巖心的實(shí)驗(yàn)結(jié)果進(jìn)行的分析,我們認(rèn)為采用新型磺基甜菜堿表面活性劑為配方中,二元體系與三元弱堿(Na2CO3)體系及三元強(qiáng)堿(NaOH)體系驅(qū)油效果相當(dāng)。
[Abstract]:At present, binary compound flooding and ASP flooding have entered the field experiment stage in our country. Due to the difficulty of producing liquid treatment in ASP flooding technology, there is no good solution for many negative factors, such as formation damage, etc. ASP flooding is facing the difficulty of industrialization. The binary system of polymer surfactants shows the characteristic of no alkali in the system, which reduces the formation damage directly and effectively in the form of "cure the root", and is more maneuverability in the field, which is more and more popular in each oil field now. But the imperfection is that the characteristics of binary composite flooding system itself will cause the increase of interfacial tension between oil and water, and it will be difficult to reach the ultra-low order of magnitude (10-3mN/m) of interfacial tension, and the improvement of oil displacement efficiency will meet the bottleneck. In the absence of alkali, surfactants will be adsorbed in large quantities, resulting in serious loss of surfactants. Moreover, for a long time, surfactants have been limited by higher cost. The research and development of surfactants are also focused on the development of new surfactants and the optimum selection of suitable extraction conditions. According to the present situation, the interfacial tension and fluidity of the new sulfobetaine were evaluated, and the adsorption test and physical simulation of the new sulfobetaine were carried out. The results show that the interfacial tension of the new sulfonbetaine binary system can reach the 10-4mN/m order of magnitude when the molecular weight of the polymer is 7-9.5 million, the concentration of polymer is from 500mg/L to 2000 mg/L, and the molecular weight of the polymer is 1600-19 million, and the concentration of polymer is 500 mg / L. The adsorption capacity of new sulfobetaine in binary and ternary systems is lower than that in monolithic systems. It can effectively avoid the loss of oil displacing agent and keep the concentration of the system effectively. It is suitable for the third production of Yu Daqing oilfield under certain conditions. The new type of betaine surfactant has no effect on the elastic properties of the system. The polymer concentration is directly proportional to the stable pressure difference of polymer flooding and subsequent water flooding, and the higher the molecular weight is, the greater the ratio is. At the same time, the molecular weight increases and the pressure difference increases accordingly. The resistance coefficient and residual resistance coefficient are proportional to polymer concentration and molecular weight. Based on the analysis of the experimental results of heterogeneous cores, we consider that the binary system is equivalent to the ternary weak base (Na2CO3) system and the ternary strong alkali (NaOH) system in the formulation of new sulfobetaine surfactants.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE357.46
本文編號(hào)：2163825
[Abstract]:At present, binary compound flooding and ASP flooding have entered the field experiment stage in our country. Due to the difficulty of producing liquid treatment in ASP flooding technology, there is no good solution for many negative factors, such as formation damage, etc. ASP flooding is facing the difficulty of industrialization. The binary system of polymer surfactants shows the characteristic of no alkali in the system, which reduces the formation damage directly and effectively in the form of "cure the root", and is more maneuverability in the field, which is more and more popular in each oil field now. But the imperfection is that the characteristics of binary composite flooding system itself will cause the increase of interfacial tension between oil and water, and it will be difficult to reach the ultra-low order of magnitude (10-3mN/m) of interfacial tension, and the improvement of oil displacement efficiency will meet the bottleneck. In the absence of alkali, surfactants will be adsorbed in large quantities, resulting in serious loss of surfactants. Moreover, for a long time, surfactants have been limited by higher cost. The research and development of surfactants are also focused on the development of new surfactants and the optimum selection of suitable extraction conditions. According to the present situation, the interfacial tension and fluidity of the new sulfobetaine were evaluated, and the adsorption test and physical simulation of the new sulfobetaine were carried out. The results show that the interfacial tension of the new sulfonbetaine binary system can reach the 10-4mN/m order of magnitude when the molecular weight of the polymer is 7-9.5 million, the concentration of polymer is from 500mg/L to 2000 mg/L, and the molecular weight of the polymer is 1600-19 million, and the concentration of polymer is 500 mg / L. The adsorption capacity of new sulfobetaine in binary and ternary systems is lower than that in monolithic systems. It can effectively avoid the loss of oil displacing agent and keep the concentration of the system effectively. It is suitable for the third production of Yu Daqing oilfield under certain conditions. The new type of betaine surfactant has no effect on the elastic properties of the system. The polymer concentration is directly proportional to the stable pressure difference of polymer flooding and subsequent water flooding, and the higher the molecular weight is, the greater the ratio is. At the same time, the molecular weight increases and the pressure difference increases accordingly. The resistance coefficient and residual resistance coefficient are proportional to polymer concentration and molecular weight. Based on the analysis of the experimental results of heterogeneous cores, we consider that the binary system is equivalent to the ternary weak base (Na2CO3) system and the ternary strong alkali (NaOH) system in the formulation of new sulfobetaine surfactants.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE357.46
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