克拉玛依九9区齐古组稠油提高开发效果研究

克拉玛依油田九9区齐古组油藏由于埋藏浅,地层胶结疏松,汽窜出砂严重,影响了油井的生产效果。针对该油藏逐步进入蒸汽吞吐的中后期,采出程度高,油井高含水,产能低,边底水侵入,开采难度加大,产量递减加快,开发效益下降等现状,为了改善油藏整体开发效果,选择该油藏有代表性的井组,利用数值模拟方法对其进行下步开发方案设计与指标预测。数值模拟结果符合油田开发实际。研究表明:克拉玛依油田九9区齐古组油藏吞吐生产后转连续蒸汽驱对改善生产效果,提高采收率具有一定的积极的作用。

Research on Improving Development Effect in the Heavy Oil Reservoirs of Qigu Formation in Block Jiu 9 of Karamay Oilfield

The heavy oil reservoirs of Qigu Formation in block Jiu9 of Karamay Oilfield is shallowly buried and loosely consolidated,which leads to serious steam channeling and sand production and thus impedes the well production.The reservoir has come into middle and later stage of steam soak production.It takes on characteristics as high water-cut,low production,edge and bottom water invasion,which accelerate production decline,and make the exploitation difficult and the benefit of development is descending.In order to improve the reservoir development,a typical well group is chosen for studying.With the application of reservoir numerical simulation,a detailed study is done on the design of exploitation projects and index forecasting.The simulated results accord with the reality of the oilfield exploitation.The research indicates that oil recovery of the reservoirs of Qigu Formation in Block Jiu 9 of Karamay Oilfield will certainly be enhanced if continuous steam-flood is adopted after steam soaking.