海上J油田二元复合驱体系性能改进及应用
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摘要
海上J油田聚驱后开展二元复合驱实验,已累计实施8井次现场施工,并取得了较好的效果,截止到目前累计增油100×10~4m~3。但同时也出现了部分问题,如井口注入压力接近流程上限、受益井含水上升速度快等,严重影响了近年来化学驱开发效果。因此以二元复合驱体系为研究对象,通过筛选和评价得到性能改进的二元驱油体系,与现场实际使用体系进行性能对比。结果表明,改进二元驱油体系可以有效减少干粉溶解时间,并获得较高黏度,可以很好的分散乳化原油,剪切黏度保留率高。物模驱油实验结果显示,改进二元体系与现场使用体系相比较可以提高采收率值1.54%,体现较好的驱油效果。现场实验证明在相同的注入条件下,新体系溶解速度快、效果好,可以维持比较高的溶液黏度,入井液与原有体系相比提高黏度13%。
Offshore J oilfield in Bohai bay acquired a better benefit and EOR efficiency with the development of binary compound flooding. Field experiment is 8 well times with 1 million tons of cumulative incremental oil production. But high pressure and water content with the implementation of the project affected the field development effect. In this paper, binary compound flooding system has been optimized and improved, and been compared with the using system. The achievements show that the improved SP system has less dissolution time,higher viscosity and higher shear viscosity retention rate. It could also emulsify and disperse oil well. The enhanced recovery was 1.54 % higher than the system in-use in short core and long core experiments. The platform process test results show that the solubility polymer was solubility dissolved faster and kept 13 % higher viscosity, which showed that it was provided with good application value and potential.
Offshore J oilfield in Bohai bay acquired a better benefit and EOR efficiency with the development of binary compound flooding. Field experiment is 8 well times with 1 million tons of cumulative incremental oil production. But high pressure and water content with the implementation of the project affected the field development effect. In this paper, binary compound flooding system has been optimized and improved, and been compared with the using system. The achievements show that the improved SP system has less dissolution time,higher viscosity and higher shear viscosity retention rate. It could also emulsify and disperse oil well. The enhanced recovery was 1.54 % higher than the system in-use in short core and long core experiments. The platform process test results show that the solubility polymer was solubility dissolved faster and kept 13 % higher viscosity, which showed that it was provided with good application value and potential.
引文
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[3]杨振宇,等.国内外复合驱技术研究现状及发展方向[J].大庆石油地质与开发,2004,(23):94-96.
[4]康万利,董喜贵.三次采油化学原理[M].北京:化学工业出版社,1997.
[5]牛瑞霞,程杰成,龙彪,等.二元无碱驱油体系的室内研究与评价[J].新疆石油地质,2006,27(6):733-735.
[6] Wang Deming,HaoYuexing.Results of Two Polymer Flooding Pilots in the Central Area of Daqing Oilfield[C]. SPE 26401,1993.
[7] Wang Demin,Cheng Jiecheng,Wu Junzheng.Summary of ASP Pilots in Daqing Oilfield[C].SPE 57288,1999.
[8]张晓冉,孟祥海,等.聚合物及聚合物/表面活性剂二元复合驱油体系在超长岩心中运移规律[J].油田化学,2017,34(2):312-317.