利用渗吸法提高低渗油藏采收率技术

Using imbibition method to improve recovery efficiency of low permeability reservoir

吴应川 张惠芳 代 华

中国石化石油勘探开发研究院，北京 100083 中原油田分公司勘探开发科学研究院，河南 濮阳 457001 中原油田分公司采油工程技术研究院，河南 濮阳 457001

Research Institute of PetroleumExploration and Development, SINOPEC, Beijing 100083, China Research Institute of Exploration and Development, Zhongyuan Oilfield Company, SINOPEC, Puyang 457001, China Research Institute of Oil Production Engineering and Technology, Zhongyuan Oilfield Company, SINOPEC, Puyang 457001, China

在不同温度条件下，通过对特低渗、低渗和中渗的岩心进行渗吸模拟实验，揭示了不同渗透率岩心的渗吸速度、渗吸采收率特征及其渗吸效应随温度的变化规律，并分析了温度对渗吸效果的影响机理，认为在高温低渗油藏中，依靠渗吸效应提高采收率的潜力大。以渗吸模拟实验为基础，在文72块沙三中油藏开展注水吞吐试验获得成功，证实了利用渗吸法提高低渗油藏采收率的可行性。

This paper reveals the change rules of imbibition rate, imbibition recovery efficiency characteristics and imbibition effect at different temperatures through the imbibition simulation experiment of ultra -low permeability, low permeability and medium permeability cores. The influence mechanism of temperature on imbibition effects is analyzed in the paper. It believes that there is a great potential of improving recovery efficiency by using imbibition effect in the high temperature and low permeability reservoirs.
The cyclic water injection test has succeeded in the Middle Es3 reservoir of Wen 72 District in Zhongyuan Oilfield through the use of imbibition effect.