低渗透油藏提高采收率的井网调整研究

Study on pattern modification of low Permeability reservoir for improving recovery factor

注采井网调整是提高老油田高合水期原油采收率的重要手段．通过对欢５０断块低渗透油层地应力和储层裂缝方向的研究，进行渗流场的数值模拟．找出了影响低渗透油层油水运动的主要因素．在此基础上提出了注采井网调整方案，为低渗透油田中晚期注采井网调整提供了依据．

Modifying flooding pattern is an important method for improving recoveryfactor of maturing field during high water-cut period. Through study on earth stress andfracture direction in low permeability reservoir of fault block Huan 50, numerical modellingof seepage flow was carried out, and the main factors of affecting oil and water migration inlow permeability reservoir were sought out. Flooding pattern modification plan was put forward based on these above. This study provides basis for flooding pattern modification inlow permeability reservoir during mid--late period.