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我国的低渗透石油探明储量和原油产量逐年增多,据中国石油天然气股份公司统计信息显示2010年以来我国73%的石油新增储量属于低渗透储量[8]。对于低渗透油藏的开发目前主要技术为注水开发。由于储层物性、注入水等多种因素的影响,注水开发过程中会出现注水压力高,含水上升速度快,水驱动用程度低等问题,这些问题会导致大部分石油滞留在油层中,油藏采收率不到20%。为了解决注水井欠注、油井产量低这一问题,提出了几种措施。
According to statistics from China National Petroleum Corporation, 73% of China’s newly added reserves of oil are low-permeability reserves since 2010 [8]. At present, the main technology for the development of low permeability reservoirs is waterflooding. Due to reservoir physical properties, water injection and other factors, there will be problems of high water injection pressure, rapid rise of water cut and low degree of water-driven use in the process of water injection development. These problems will cause most of the oil to stay in the oil layer. Reservoir recovery less than 20%. In order to solve the problem of insufficient injection wells and low oil well production, several measures were put forward.