稠油高温气体辅助蒸汽驱的可行性研究

针对目前稠油油藏开发效益差、产量低的现状,开展了适用稠油油藏的注气方式研究。从稠油粘温特性和流变特性入手,分析了蒸汽驱开采稠油的驱油机理以及目前开发中所存在的问题,并通过理论分析和室内实验,对利用氮气、二氧化碳气体的性质,辅助蒸汽高效开采稠油的可行性进行了深入研究。结果表明,加入氮气、二氧化碳的高温气体辅助蒸汽驱相比单纯蒸汽驱具有明显优势,原油采收率显著提高。

A Feasibility Study on Exploitation of Heavy Oil Reservoirs by High Temperature Compound Gas Drive

Aimed at the benefits decline and production shortfall of the heavy oil reservoirs, the research of the gas injection methods for heavy oil reservoirs is conducted. From the analysis of the viscosity-temperature and rheological characteristics of heavy oil, the oil displacement mechanism and problems by steam drive process for heavy oil reservoirs are investigated. According to the theoretical analysis and the experimental results, the feasibility on exploitation of heavy oil reservoirs by high temperature compound gas drive utilizing N2, CO2 and steam properties is studied in detail. The results indicate that the high temperature compound gas drive with N2 and CO2 is better than steam drive, showing much higher crude oil recovery.