海上低渗透薄互层油藏合理动用方式研究

目前国内海上低渗透油田开发处于起步阶段,介绍了利用数值模拟与油藏工程方法,确定合理开发层系,优化注水时机,提高此类油藏开发效果和经济效益的试验研究情况。结果表明,由于海上低渗透薄互层油藏的非均质性强,低渗透层若要达到较好的水驱效果,其综合影响因子要小于5,即层间渗透率级差要控制在8以内,夹层的数目在6~7层以内。针对于公司海上油田的特殊性,应采取投产即注水的开发方式,以获得更高经济效益。

Study of Production Mode for Offshore Low Permeability Thin Interbedded Oil Fields

Development of China＇s offshore low-permeability oil fields is currently under its preliminary stage. This article makes briefings about the experiment that uses numerical simulation and reservoir engineering method to determine reasonable development horizons, optimize water injection time and improve development results and economic performance of such oil reservoirs. The results indicate that the offshore low-permeability thin interbedded oil reservoirs have a strong heterogeneity. To achieve good water flooding results for low-permeability horizons, the generalized factor should be lower than 5, namely the permeability difference among the horizons should be less than 8 while there are no more than six or seven thin interbeds. As for the company＇s special offshore oilfields, the water flooding project should be preferably initiated as soon as they are put into production.