摘要
针对海上三角洲厚油层,近年来提出了早期聚合物驱的开采方法,而其强非均质性对早期聚驱效果具有较大的影响.本文利用数值模拟方法,建立了不同的储层概念模型,并研究了非均质性对早期聚驱的影响.研究表明:渗透率非均质性及韵律性越强、平面储层物性差异越大,则早期聚驱开采效果越差;而层内夹层的垂向遮挡有利于早期聚驱的开采,但其侧向遮挡会导致剩余油富集.总体而言,相对水驱,早期聚驱降低了海上三角洲厚油层非均质性的影响,并能抑制窜流通道的形成.通过认识油层非均质特征,调整开发井网,细分开发层系,可以提高早期聚驱的开发效果.
For delta thick oil reservoir at sea,early polymer flooding production method is put forward to shorten production time.However,strong heterogeneity of the delta thick reservoir has an important influence on early polymer flooding.By numerical modeling and establishing different reservoir concept model,this paper studies the effect of the heterogeneity to early polymer flooding.The results prove that while permeability heterogeneity and rhythm and the change of Planar sand body property are stronger,the recovery effect of the polymer flooding is worse.Vertical sealing of the in-layer interlayer is good for polymer flooding,but lateral sealing of the in-layer interlayer could make reservoir enrich remaining oil.Above all,compared with water flooding,early polymer flooding could reduce the effect of the strong heterogeneity of delta thickness oil reservoir at sea to recovery effect,and it could restrain the form of channeling-path.Based on the study to reservoir heterogeneity,we could reduce the effect of heterogeneity to polymer flooding by adjusting the production pattern,subdividing series of development.
出处
《陕西科技大学学报（自然科学版）》
2015年第4期106-111,共6页
Journal of Shaanxi University of Science & Technology
基金
国家重大科技专项项目(2011ZX05030-005-02
2011ZX05009-003)
关键词
海上三角洲厚油层
早期聚驱
非均质性
数值模拟
delta thick reservoir at sea
early polymer flooding
hetero
numerical modeling
