新肇油田整体周期注水技术理论探讨

新肇油田属裂缝性低渗透油藏。线性注水水线沟通后,注水压力上升速度快,导致部分水井吸水能力下降,同时也导致油井排油井间的剩余油不能得到有效动用,为此考虑在新肇油田采取整体周期注水,在缓解注水压力上升速度的同时,降低油田的注采比,通过高低渗透层的交互渗透作用,提高油井间剩余油的动用程度。

Discussion on Overall Cyclic Waterflooding Technique in Xinzhao Oilfield

Xinzhao oilfield belongs to an oilfield with fractured low permeability reservoir.After the communication of line flooding,the water injection pressure rises quickly,which causes the water absorbing capacity of some injectors descend and the residual oil of drainage well group not to be produced effectively at the same time.Therefore,it is considered that overall cyclic waterflooding is taken in Xinzhao oilfield.While alleviating the rising speed of water injection pressure,the injection to production ratio should be reduced.By making use of the alternate percolation of high-low permeability reservoir,the produced degree of residual oil in oil-well group is improved.