低渗油藏注气发展潜力与问题

我国低渗透储量大，动用难度大，动用程度低，注气对这类油藏有独到优势，尤其是目前全世界对环保越来越重视，降低温室气体排放已成为共识，CO2驱开发油藏已越来越多，注气已逐渐形成一种主流的低渗透油藏开发技术。本文分析了国外现执行的低渗透油藏注气项目情况，总结了其渗透率及流体粘度、密度和油藏深度等特点，说明了国外注气的主要对象是低渗透油藏；分析了我国低渗透油藏特点，总结了目前国内外低渗透油藏注气的实施情况，分析讨论了低渗透油藏注气过程中应当考虑的技术问题，根据我国部分油田的实施与研究情况说明了注气在低渗透油藏开发中的巨大潜力，对指导我国低渗透油藏注气开发有直接的指导意义。

Development Potentials and Problems in Gas Injection to Low-Permeability Oil Reservoirs

For low-permeability reservoirs, gas injection has unique advantages. In view of increasing attention to environmental protection worldwide, in particular, to reduce greenhouse gas emissions has become a consensus. CO2 Flooding oil displacement has been more and more. Gas injection has gradually formed a mainstream technology in the development of low permeability reservoirs. Gas injection projects of low permeability reservoirs implemented in foreign countries are analyzed in the paper. Characteristics of its permeability, fluid viscosity, density and reservoir depth are summed up. It shows that the main target of foreign gas injection is low permeability reservoirs. Characteristics of the domestic low-permeability reservoirs are analyzed. The current implementation situations of low permeability reservoir gas injection at home and abroad are summarized. Technical problems that should be considered in low permeability reservoir gas injection process are discussed. According to implementation and research of some oilfields at home, great potentials of the gas injection in low-permeability reservoir development are demonstrated in the paper.