鄂尔多斯盆地长6油层组储层水驱窜流影响因素实验研究  

Experimental Study on Influencing Factors of Fluid Channeling of Waterflooding in Chang 6 Reservoir of Ordos Basin

作　　者：张宏强[1] 张永强[1] 张晓斌[1] 张康[1] 董杰[2] 

机构地区：[1]中石油长庆油田分公司勘探开发研究院低渗透油气田勘探开发国家工程实验室,陕西西安710021 [2]中国石油大学(北京)石油工程学院,北京102249

出　　处：《长江大学学报（自科版）（中旬）》2016年第10期43-48,5-6,共6页Journal of Yangtze University(Nature Science Edition)

基　　金：国家科技重大专项(2016ZX05050)

摘　　要：依据鄂尔多斯盆地长6油层组储层的地质特征,研制了均质、非均质及裂缝型等3类模拟目标储层性质的人造岩心,并利用研制的储层模型开展了水驱窜流影响因素评价实验。实验可知,长6油层组储层受微观非均质性的影响,见水时间早且见水后含水率上升快,同时受微观非均质影响,驱油效率比中高渗透储层驱油效率低10%以上。岩心非均质程度增大,见水PV数逐渐减小,见水后含水上升快,当渗透率级差为50时,采收率比等渗透率均质油藏低12%。含裂缝的岩心中,注入水窜流严重,裂缝型特低渗油藏与同等渗透率均质油藏相比,采收率降幅近50%。Based on the geological characteristics of Chang 6Reservoir in Ordos Basin,homogeneous,heterogeneous and fractured artificial cores were developed for simulating the features of target zone,and the developed model was used to carry out an experiments for evaluating the factors affecting the water channeling in waterflooding.The result indicated Chang 6Reservoir was affected by the microanisotropy,where water breaking through was earlier with rapid increase of water content,at the same time it was also affected by the micro-heterogeneity,oil displacement efficiency was 10%lower than that of high permeability reservoirs.Oil well in Chang 6Reservoir has a short water breakthrough time,and the oil displacement efficiency is 10%lower than that in high permeability reservoir.With the increase of core heterogeneity,the PV of water breakthrough decreases gradually,after the water breakthrough,water content rises.When the permeability contrast is 50,recovery factor of Chang 6Reservoir is 12%lower than that of iso-permeability homogeneous reservoir.The water channeling is more serious in core with fractures,and in reservoir with fractures,recovery factor is 50%lower than that of the iso-permeability homogeneous reservoir.

关 键 词：水窜 渗透率 非均质性 裂缝 见水时间 水驱采收率 

分 类 号：TE312[石油与天然气工程—油气田开发工程]