摘要
薄层底水油藏注入水易沿垂向高渗透部位进入底水层造成存水率偏低。结合陆梁油田薄层底水油藏注水开发的生产特征,给出了该类油藏注入水存水率的计算公式;在试验区历史拟合的基础上,应用典型的一注一采非均质模型研究了注入水存水率的影响因素,主要包括非均质性、沉积韵律、水平与垂直渗透率比和注水速度等;提出了调整注水速度、建立层内及底水隔板提高注入水存水率的方法。隔板半径优化结果表明,其值为20m左右效果明显,试验区注入水存水率和采出程度可分别提高20.46%和4.14%。
The net injection percentage is definitely low due to the preferential injection of injected water into the high permeable zone in the thin-layer bottom water reservoir.Based on the production features of Luliang oilfield,the formula of net injection percentage is proposed.According to the history matching of the section model,influence factors of net injection percentage,such as formation heterogeneity,sedimentary rhythm,vertical permeability and horizontal permeability ratio,injection rate and so on,are discussed in a reservoir numerical model with a producing well and a injection well.In view of the discussion herein,it is proposed that the regulation of injection rate,building up of inner-layer barrier and bottom water barrier can improve the net injection percentage.Results of barrier radius optimization show that,appropriate radius of barrier is 20m,and the net injection percentage is accordingly increased by 20.46% and 4.14% for reserve recovery.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2010年第4期84-86,90,共4页
Petroleum Geology and Recovery Efficiency
基金
中国石油天然气集团公司重点科技项目"薄层底水油藏水锥控制技术研究与应用"(W04070)
关键词
薄层
底水油藏
注入水存水率
隔板半径
陆梁油田
thin-layer
bottom water
net injection percentage
barrier radius
Luliang oilfield
