裂缝型潜山稀油油藏开发技术界限研究

为研究油藏地质参数和注采参数对潜山稀油油藏采收率的影响,以渤海A油田为例,应用Eclipse数值模拟软件,建立概念模型,进行了油藏地质参数对最终采收率的敏感性分析,包括裂缝渗透率、裂缝孔隙度、裂缝倾角、裂缝密度等;同时对注采参数进行了优选,包括井网、注水位置、采液强度。研究结果表明,裂缝越发育油藏采出程度越高,对于裂缝型油藏最优的井网形式为平行交错井网,注水位置应该选在靠近油藏底部,最优水平井长度为800~1 000 m,最优采油速度3%左右。

Technical limits research of fractured thin oil reservoir development technology

In order to make a study on the effect of reservoir geology and injection-production parameters of buried hill thin oil reservoir on recovery efficiency,Eclipse numerical simulation software has been applied to establish the conceptual model.The sensitivity analysis of the reservoir geological parameters on the ultimate recovery has been carried out,and the fracture permeability,fracture porosity,fracture dip and fracture density,and etc are included.Meantime,the injection-production parameters have been optimized,including well pattern,injection location,liquid withdrawal.Theresearch results show that when the fracture development is better,the reservoir recovery degree is higher.The optimal well pattern for fracture type reservoir is the parallel crisscross pattern.The water injection location should be chosen near the bottom of the reservoir,the optimum length of horizontal well is 800 ~ 1 000 m,and the optimal production rate is about 3%.