目前,国内油田总体上处于高含水开发阶段。尤其是油田开发的中后期,低渗透油田一般天然能量不足,开采强度增大,开采难度增加,特别是低渗透油藏存在“注不进、采不出”的问题,国内各大油田都在不断发展、研究适合本区域的二次采油技术,以减缓老油田产量递减、含水上升的局面,并取得了一定成效。 At present, the domestic oilfields are generally in the stage of high water-cut development. Especially in the middle and late stages of oilfield development, low permeability oilfields generally lack natural energy, increase mining intensity and increase exploitation difficulty, especially the problem of low permeability reservoirs, Are constantly developing and studying secondary recovery technologies suitable for the region to reduce the production decline and water cut in the old oilfields and have achieved some success.