尿素在稠油油藏注蒸汽开发中的实验研究及应用  

Experimental study and application of urea in steam flooding of heavy oil reservoir

作　　者：沈德煌 谢建军[2] 王晓春 

机构地区：[1]中油勘探开发研究院,北京100083 [2]中石化河南油田分公司,河南南阳473132

出　　处：《特种油气藏》2005年第2期85-87,102,共4页Special Oil & Gas Reservoirs

基　　金：中石化集团公司深层稠油开采配套技术研究部分成果 (项目编号 :P0 0 0 6)

摘　　要：对稠油注蒸汽添加尿素及泡沫剂开采技术的机理进行了研究,并在河南油田进行现场应用。研究表明:尿素水溶液可降低油-水界面张力,使原油粘度大幅度下降;蒸汽添加尿素驱、尿素及泡沫辅助蒸汽驱技术不仅能改善蒸汽的波及体积,提高采收率,而且还能明显提高采油速度。现场试验效果表明,该技术可使阶段油汽比提高114 % ,采注比提高116 % ,并且成功率达10 0 % ,累计增油170 0 3 34t,获得了较高的经济效益。The recovery mechanism of heavy oil steam flooding by adding urea and foaming agent is studied and applied in Henan oilfield. The study shows that urea solution can reduce the interfacial tension of oil-water contact and oil viscosity; urea added steam flooding and urea and foam assisted steam flooding can improve the swept volume, recovery factor and oil recovery rate. Site test indicates that this technology can improve stage oil-steam ratio by 114%, injection-production ratio by 116%, with success ratio of 100% and cumulative oil increment of 17003.34 t. This technology can be used in marginal reservoirs which are unsuitable to steam drive in the late stage of cyclic steam stimulation and heavy oil reservoirs which have poor steam drive response.

关 键 词：稠油油藏 注蒸汽开发 尿素 泡沫剂 开采技术 机理研究 现场应用 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]