本文選題：反相乳液聚合法 + 微球　； 參考：《西南石油大學(xué)》2015年碩士論文

【摘要】：調(diào)驅(qū)微球是一種納微米級(jí)的吸水材料,對(duì)于低滲透非均質(zhì)油藏,微球尺寸小、數(shù)量多、可變形的特點(diǎn)在深部調(diào)驅(qū)技術(shù)中具有獨(dú)特的優(yōu)勢(shì),在油田的應(yīng)用越來(lái)越多。目前使用的微球調(diào)驅(qū)體系存在乳化劑用量大,驅(qū)油效率低,抗高溫高鹽性能差等不足,為此,本文從微球穩(wěn)定性和低界面張力乳化體系兩方面開展研究,取得的認(rèn)識(shí)和成果如下： 1.選擇丙烯酰胺(AM),2-丙烯酰胺基-2-甲基丙磺酸(AMPS)和N-乙烯基吡咯烷酮(NVP)為聚合單體；以乳液電導(dǎo)率、粘度、穩(wěn)定指數(shù)和界面張力為指標(biāo),考察乳化劑類型、配比對(duì)乳液穩(wěn)定性的影響,確定質(zhì)量比為62/18/20的Span80/Tween60/OA復(fù)配乳化劑制備反相乳液合成調(diào)驅(qū)微球。反相乳液體系中水相占51.6%,白油占41.2%,乳化劑占7.2%,攪拌速率850r/min。 2.采用單因素法考察引發(fā)劑類型、加量,反應(yīng)溫度,乳化劑加量和交聯(lián)劑加量對(duì)單體轉(zhuǎn)化率和微球粒徑的影響。結(jié)合正交實(shí)驗(yàn)法確定最佳聚合條件為：攪拌速率350r/min,V-50占單體質(zhì)量分?jǐn)?shù)0.027%,MBA加量0.05%,溫度50℃,單體轉(zhuǎn)化率80%。 3.利用光學(xué)顯微鏡,激光粒度儀和掃描電鏡對(duì)微球形態(tài)進(jìn)行評(píng)價(jià)。微球干粉平均直徑3μm,成球性好；在自來(lái)水中初始粒徑分布為4.08～27.93μm,平均直徑11.78μm。微球具有較好的膨脹性和穩(wěn)定性,礦化度高于10000mg/L,膨脹倍數(shù)不再增加保持在2倍左右；膨脹后粒徑分布變寬；90℃,20×104mg/L地層水中老化60d,微球略有變形,120d仍可保持球形結(jié)構(gòu)。根據(jù)Span80/Tween60/OA體系中油酸用量與等摩爾量的NaOH中和后,可將DKl井原油／水界面張力降至10-2數(shù)量級(jí),性能優(yōu)于Span80/Tween60體系；微球體系與甜菜堿、石油磺酸鹽、聚合物復(fù)配均有一定協(xié)同效應(yīng)。 4.物理模擬實(shí)驗(yàn)表明微球能夠進(jìn)入滲透率高于262mD的巖心,巖心孔喉直徑與微球粒徑比為1.02時(shí),封堵運(yùn)移效果最佳。水驅(qū)后調(diào)驅(qū)微球可將DKl井原油采收率提高18.54%。對(duì)滲透率級(jí)差為9.3的并聯(lián)巖心具有較好的剖面改善能力。
[Abstract]:The microsphere is a kind of water absorbent material of nanometer and micron scale. For the low permeability heterogeneous reservoir, the microsphere is small in size, large in quantity and deformable. It has unique advantages in deep control flooding technology, and has been applied more and more in oil fields. At present, the microsphere controlled flooding system has some shortcomings, such as large amount of emulsifier, low oil displacement efficiency, poor resistance to high temperature and high salt, etc. Therefore, the stability of microspheres and the emulsification system of low interfacial tension are studied in this paper. The following awareness and results have been achieved: 1. The emulsion conductivity, viscosity, stability index and interfacial tension were determined by using AMPS and NVP) as polymeric monomers, and the type of emulsifier was investigated by using the emulsion conductivity, viscosity, stability index and interfacial tension as the index of emulsion conductivity, viscosity, stability index and interfacial tension. The influence of the ratio on the emulsion stability was determined. The Span80/Tween60/OA emulsifier with the mass ratio of 62-18-20 was used to prepare the modified flooding microspheres by inverse emulsion synthesis. In the reverse emulsion system, 51.6% water, 41.2% white oil, 7.2% emulsifier, and 850 r / min stirring rate. 2. The effects of type of initiator, amount of initiator, reaction temperature, amount of emulsifier and amount of crosslinking agent on monomer conversion and particle size were investigated by single factor method. The optimum polymerization conditions were determined by orthogonal experiment: the stirring rate was 350 r / min V-50 / monomer mass fraction 0.027%, the mass fraction of MBA was 0.05%, the temperature was 50 鈩，

本文編號(hào)：1799646