高效水溶性稠油降黏剂的优选及性能评价
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摘要
为了满足辽河油田稠油开采过程中对高效降黏剂的需求,以黏度和降黏率为主要评价指标,通过考察5种水溶性降黏剂[AR-815(S-1,阴离子型)、POI/PL-1(S-2,阴离子/非离子型)、DHF(S-3,阴离子型)、AE-169(S-4,非离子型)、RO-1(S-5,非离子型)]对辽河稠油的降黏效果及其耐温抗盐性优选了水溶性降黏剂,并将优选的降黏剂与表面活性剂复配筛选了最优稠油降黏剂,并进行了微观驱油实验。研究结果表明,在80℃、油水体积比70∶30的情况下,S-1数S-5水溶性降黏剂对原油的最佳降黏质量分数分别为0.5%,0.25%,0.75%,0.5%,和0.3%,降黏率为98.63%数99.72%;在最佳降黏质量分数下,降黏剂S-4和S-5具有良好的耐温性和耐盐性,降黏率基本不受温度和矿化度的影响。0.5%AOS(α-烯烃磺酸盐)+0.3%S-5复配体系对稠油的降黏率最高,降黏率为99.64%,且该复配体系的耐温性和耐盐性好,在200℃、15000 mg/L条件下恒温放置3 d后对稠油的降黏率保持不变。微观驱替实验结果表明,0.5%AOS+0.3%S-5复配体系段塞驱替后,剩余油明显减少,提高采收率效果显著。图12表2参13
In order to satisfy the need for efficient viscosity reducer in the process of heavy oil development for Liaohe oilfield,the heavy oil viscosity reducer was optimized through investigation of the viscosity reducing effect 5 kinds of water-soluble solvent,including anion viscosity reducer AR-815(S-1),anion/non-ionic viscosity reducer POI/PL-1(S-2),anion viscosity reducer DHF(S-3),non-ionic viscosity reducer AE-169(S-4) and non-ionic viscosity reducer RO-1,on the Liaohe heavy oil and their temperature-resistant and salt-resistant property. The complex system was obtained through composing the viscosity reducer with the surfactant,and the viscosity reducing property was measured,and microscopic flooding experiment of the optimized complex system was carried out. The results showed that,at the ratio of oil to water ratio 70∶30,the optimal concentrations of S-1—S-5 water-soluble viscosity reducers for Liaohe crude oil viscosity reduction were 0.5%,0.25%,0.75%,0.5% and 0.3%,respectively,at the temperature of 80℃,the viscosity reducing rate was between 98.63% and 99.72%. At the optimal concentration,both S-4 and S-5 had good temperature resistance and salt tolerance,the viscosity reducing rate changed hardly. The complex system of 0.5%AOS and 0.3% S-5 had the highest viscosity reducing rate,which reached up to 99.64%,and the complex system had very good temperature resistance and salt tolerance,the viscosity reducing rate remained the same at the temperature of 200℃ and the salinity of 15000 mg/L. Microscopic flooding experiment results showed that the oil recovery was enhanced obviously by 0.5% AOS and0.3% S-5 complex system flooding.
In order to satisfy the need for efficient viscosity reducer in the process of heavy oil development for Liaohe oilfield,the heavy oil viscosity reducer was optimized through investigation of the viscosity reducing effect 5 kinds of water-soluble solvent,including anion viscosity reducer AR-815(S-1),anion/non-ionic viscosity reducer POI/PL-1(S-2),anion viscosity reducer DHF(S-3),non-ionic viscosity reducer AE-169(S-4) and non-ionic viscosity reducer RO-1,on the Liaohe heavy oil and their temperature-resistant and salt-resistant property. The complex system was obtained through composing the viscosity reducer with the surfactant,and the viscosity reducing property was measured,and microscopic flooding experiment of the optimized complex system was carried out. The results showed that,at the ratio of oil to water ratio 70∶30,the optimal concentrations of S-1—S-5 water-soluble viscosity reducers for Liaohe crude oil viscosity reduction were 0.5%,0.25%,0.75%,0.5% and 0.3%,respectively,at the temperature of 80℃,the viscosity reducing rate was between 98.63% and 99.72%. At the optimal concentration,both S-4 and S-5 had good temperature resistance and salt tolerance,the viscosity reducing rate changed hardly. The complex system of 0.5%AOS and 0.3% S-5 had the highest viscosity reducing rate,which reached up to 99.64%,and the complex system had very good temperature resistance and salt tolerance,the viscosity reducing rate remained the same at the temperature of 200℃ and the salinity of 15000 mg/L. Microscopic flooding experiment results showed that the oil recovery was enhanced obviously by 0.5% AOS and0.3% S-5 complex system flooding.
引文
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[2]柳荣伟,陈侠玲,周宁.稠油降黏技术及降黏机理研究进展[J].精细石油化工进展,2008,9(4):20-25.
[3]尉小明.特稠油SGVR-1水基降黏剂的研制[J].特种油气藏,2005,12(2):79-81.
[4]郑秀娟,刘东升,林茂森.PS降黏剂在稠油开采中的试验及应用[J].特种油气藏,1995(3):49-52.
[5]王秀平,王胜利,王宪忠.清防蜡降黏剂HCY-01的研制与应用[J].断块油气田,2001,8(5):54-56.
[6]李德儒.GCS-YR油溶性降黏剂的研制与应用[J].石油钻采工艺,2016,38(2):267-271.
[7]刘新秀.新型油溶性催化剂体系对稠油降黏效果评价及矿场试验效果[J].中国石油石化,2017(1),107-108.
[8]HEILMAN W J,WILBURN B E.Methacrylate pour point depressants and compositions:US 4 956 111[P].1990-09-11.
[9]MISHRA M K,SAXTON R G.Pour point depressants via anionic polymerization of(meth)acrylic monomers:US 5 834 408[P].1998-11-10.
[10]李孟洲,龚大利,尉小明.超稠油乳化降黏剂SHVR-02的研制[J].油田学,2004,21(1):26-28.
[11]赵福麟.采油化学[M].东营:石油大学出版社,1989,149-152.
[12]吴本芳,杨允明,沈本贤,等.SL的合成及降黏性能研究[J].油田化学,2003,20(1):78-82.
[13]贝歇尔.乳状液理论与实践[M].北京:科学出版社,1978,97-98.