低渗透油藏注水层位合理射开参数研究——以鄂尔多斯盆地张柴窑子区长6油藏为例  

Research on reasonable injection parameters of low permeability reservoir: A case study of Chang6 reservoir in Zhangchaiyaozi Area,Ordos Basin

作　　者：赵思远 唐后军 肖胜东 贾自力 ZHAO Siyuan;TANG Houjun;XIAO Shengdong;JIA Zili(Research Institute of Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Xi’an 710065,China)

机构地区：[1]陕西延长石油(集团)有限责任公司研究院,西安710065

出　　处：《非常规油气》2021年第5期106-114,共9页Unconventional Oil & Gas

基　　金：国家科技重大专项“延安地区陆相页岩气勘探开发关键技术”(2017ZX05039)。

摘　　要：针对延长油田低渗透油藏储层非均质性强、类型多样的特点,该文以鄂尔多斯盆地张柴窑子区长6储层为研究对象,利用数值模拟方法,建立了正韵律、反韵律、上正下反韵律和上反下正韵律4种模型,对注水层位射开参数进行了数值模拟研究。研究结果表明,不管哪种韵律的储层,最优射开位置均为渗透率低的位置;对同一射开位置,射开程度越低,采出程度越高,含水率上升越慢,开发效果越好。因此,注水层位选择渗透率低的位置,射开程度选择1/5时效果最好,可有效提高油井采出程度,减缓含水上升速度,对指导现场作业具有重要的意义。In view of the characteristics of strong heterogeneity and diverse types of low permeability reservoirs in Yanchang Oilfield, this paper takes Chang6 reservoir in Zhangchaiyaozi Area of Ordos Basin as the research object, and uses numerical simulation method to establish four models, including positive rhythm, negative rhythm, positive downward rhythm and negative downward rhythm, to carry out numerical simulation research on the injection parameters of water injection layer. The results show that the optimal perforated location is the low permeability location regardless of the rhythm of the reservoir. For the same perforated position, the lower the perforated degree is, the higher the recovery degree is, and the slower the moisture content rises, the better the development effect is. Therefore, the best effect is to choose the position with low permeability in the water injection layer and the perforated degree of 1/5, which can effectively improve the recovery degree of oil wells and slow down the rise rate of water cut. It is of great significance to guide field operation.

关 键 词：低渗透油藏 射开位置 射开程度 数值模型 

分 类 号：TE348[石油与天然气工程—油气田开发工程]