聚驱后不同化学驱微观特征研究

Study on Microscopic Residual oil Characters of Different Chemical Floodings after Polymer Flooding

目前胜利油田Ⅲ、Ⅳ类油藏和聚合物驱后油藏总和约为7亿吨,资源丰富,成为今后化学驱的主阵地。聚合物驱后剩余油挖潜,是目前重要的研究课题。其中,二元复合驱正在孤东、孤岛和胜坨等油田实施,取得显著效果,得到中石化总经理的肯定。进一步研究其微观驱替规律,有利于为油田现场的应用和推广提供理论支持;预交联驱是目前研究的热点,而进一步分析其对剩余油影响的文章很少。本文论述了聚驱后的剩余油分布特征,详细分析了聚驱后二元驱的驱油效率和波及效率;探索研究了聚驱后预交联体系调剖,调驱作用及对剩余油的影响。

At present, the Ⅲ and Ⅳ turma oil reservoir and the oil reservoir after polymer flooding in Shengli oil field which the total number is about 7 hundred million tons. Because of the abundant resources, it will become the major region of chemical flooding for the future. The residual oil potency after polymer flooding is an important study task at present. The binary composite flooding is implementing in Gudong, Gudao and Shengtuo etc. oil fields, which had obtained remarkable effects and received the Gen- eral Manager Sushulin＇s confirm. Deeply researching its microscopic displacement rules which is benefit to offer the theory support for the application and spread of the oil field on--site. Pre--cross link drive is a hotspot of the present research, although the articles which analyzed deeply the influence to the residual oil are few. This article discusses the residual oil distributing characters after polymer flooding, analyzing in detail the displacement efficiency and swept efficiency of the binary flooding after polymer flooding, exploring pre--cross link system profile control after polymer flooding, regulating drive action and the influence to the residual oil.