ACTA PETROLEI SINICA ›› 2014, Vol. 35 ›› Issue (2): 310-318.DOI: 10.7623/syxb201402011

• Oil Field Development • Previous Articles     Next Articles

Key theories and technologies for enhanced oil recovery of alkaline/surfactant/polymer flooding

Cheng Jiecheng, Wu Junzheng, Hu Junqing   

  1. Daqing Oilfield Company Limited, Daqing 163002, China
  • Received:2013-09-14 Revised:2013-12-31 Online:2014-03-25 Published:2014-04-11

三元复合驱提高原油采收率关键理论与技术

程杰成, 吴军政, 胡俊卿   

  1. 大庆油田有限责任公司 黑龙江大庆 163002
  • 通讯作者: 程杰成,男,1962年9月生,1983年毕业于黑龙江大学化学专业,2000年获大连理工大学应用化学专业博士学位,现为大庆油田有限责任公司副总工程师、教授级高级工程师,主要从事三次采油技术的理论和应用研究。Email:chengjiecheng@petrochina.com.cn
  • 作者简介:程杰成,男,1962年9月生,1983年毕业于黑龙江大学化学专业,2000年获大连理工大学应用化学专业博士学位,现为大庆油田有限责任公司副总工程师、教授级高级工程师,主要从事三次采油技术的理论和应用研究。Email:chengjiecheng@petrochina.com.cn
  • 基金资助:

    国家重大科技专项(2008ZX05052);国家重点基础研究发展计划(973)项目(2005CB221305);中国石油天然气股份有限公司重大科技项目(2011E-1207)资助。

Abstract:

Compared with polymer flooding, alkaline/surfactant/polymer(ASP) flooding has higher recovery efficiency, and technology is more complicated. There are 83×108 tons of the reserves suitable for ASP flooding; only for Daqing oilfield, there are about 14×108 tons reserves that can be produced by injecting ASP solutions. The potentialities are great, but commercial production of ASP flooding doesn't realize for there are still many technical hurdles not be effectively spread. Based on the study and practice in ASP flooding for many years, formula systems of ASP flooding were developed, break through the technical limit that the crude oil with low acid value is hard to achieve ultralow interfacial tension in Daqing oilfield. The alkyl benzene sulfonate surfactant was developed, and commercial production of the surfactant has been realized. Meanwhile, available well pattern, well space, layers combination and injection parameters are also determined. The related key technologies such as lifting technique of scale control, the treatment of produced fluids have been gained, which can satisfy the needs of ASP commercial production. Field application results show that oil recovery by ASP system can be over 20% and 10% higher than water and polymer flooding, respectively. Being as a key alternative technology for Daqing oilfield's sustainable development, the industrial promotion of ASP flooding is ongoing, and this technology can provide technical support for other oil field development of high water cut stage and efficient development of continental sandstone oil field.

Key words: alkaline/surfactant/polymer flooding, enhanced oil recovery, surfactant, project design, lifting technique of scale control, produced fluids treatment

摘要:

三元复合驱是比聚合物驱提高采收率幅度更高、技术更复杂的驱油技术,中国适合于三元复合驱的地质储量约为83×108 t,仅大庆油田就有近14×108 t的储量,其潜力巨大,但由于很多关键技术问题没有得到有效解决,因此未能进入工业应用。通过多年的研究与实践,突破了大庆油田低酸值原油无法形成超低界面张力的技术界限,发明了三元复合体系新配方;研制出了烷基苯磺酸盐表面活性剂,并实现了工业化生产;优化确定了适合于三元复合驱的井网井距、层系组合和注入参数;攻克了防垢举升、采出液处理等关键配套技术,整体上达到了工业化应用条件。现场应用实践表明,三元复合驱可在水驱基础上提高采收率20% 以上,比聚合物驱提高采收率多10% 。三元复合驱技术作为大庆油田持续稳产的战略接替技术正在工业化推广,并可以为其他高含水开发阶段的老油田挖潜和陆相砂岩油田的高效开发提供技术支持。

关键词: 三元复合驱, 提高采收率, 表面活性剂, 方案设计, 防垢举升, 采出液处理

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