低渗透油田超前注水增产机理研究

超前注水在低渗透油田开发实践中,相对于同步注水和滞后注水,已显示出其优越性,但目前在超前注水增产机理方面的研究还不够深入.在前人研究基础上,针对不同类型低渗透储层特性,推导出超前注水相关的一些经验公式和理论模型.从推导出的理论模型可以看出,超前注水可以增加低渗透储层驱替压力梯度,降低初期含水,提高单井产量和降低油田产量递减率.研究结果可为低渗透油田超前注水技术提供理论指导.

Study on the stimulation mechanism of the advanced water flooding in low-permeability oilfield

In the development of low-permeability oilfields,advanced water flooding has better performances than synchronous water flooding and delayed water flooding,and the deeper study on the simulation mechanism of the advanced water flooding is necessary.Some empirical formulas and theoretical models of the advanced water flooding for different types of low-permeability reservoirs are obtained based on the researches of predecessors.From these models,it can be found that the advanced water flooding can increase the displacement pressure gradient of the low-permeability reservoirs and the single-well yield of the oilfields,and decrease the initial water-cut and production decline rate of the oilfields.The study can provide theoretical references for the development of the low-permeability oilfields.