低渗透油藏通常具有低丰度、低压、低产“三低”特点,其有效开发难度很大。我国中低渗透石油储量的比例越来越高,探明低渗透地质储量占我国探明油气资源地质储量1/3以上。为了高效开发低渗透油气,取得好的经济效益,渗透油藏油气开发向着应用保护油层为主的小 Low-permeability reservoirs usually have the characteristics of low abundance, low pressure and low yield “three low ”, and their effective development is very difficult. The proportion of low and medium-permeability oil reserves in China is getting higher and higher. It is proved that the low-permeability geological reserves account for more than one third of the geological reserves of proven oil and gas resources in China. In order to develop low-permeability oil and gas efficiently and achieve good economic benefits, the development of oil and gas reservoirs should be small