大幅度提高石油采收率的基础研究

Basic Research on Enhancing the Oil Recovery of Matured Oil Fields

大幅度提高石油采收率是缓解我国油气资源紧张状况的有效途径。本项目以化学复合驱油技术为重点,以研制廉价、高效、环保的驱油剂为突破口,力求在基础理论方面取得重大突破,使化学复合驱形成生产力,得以大规模应用,从而大幅度提高石油采收率,创造巨大的经济效益和社会效益。化学复合驱油技术的驱油机理、物化现象及影响因素等异常复杂,许多基础理论问题尚未解决,因此距工业化应用仍有一定的差距。本文重点介绍项目拟解决的四个关键科学问题,即驱油体系的物理化学基础、驱油体系与油藏物理化学环境的相互作用、油层物理及油藏精细描述以及驱油体系在油层中的物化渗流与数值模拟的研究。

Enhancing the oil recovery of matured oil fields developed by conventional methods is a major way to release the shortage of petroleum resources in China. The purpose of this project is focusing on the technology of chemical combination flooding to gain the benefits both in the aspects of economy and society by making use of the technique based on the investigation of oil field chemicals which feature as low cost, high efficiency and environmental safe and also based on the breakthrough of theoretical studies. The mechanism of oil displacement and physical-chemical phenomenon of chemical combination flooding is quite complex, and some basic theoretical problems still need to be further revealed. This paper mainly introduces the 4 key scientific topics concerned with the application of chemical combination flooding, includes design and synthesis of chemicals used in oil fields, physical-chemical interaction of oil displacement system and matrix of reser-voir, petro-physics and fine description of the reservoir, physical-chemical substantial flow and numerical simulation.