渤海海域L油田砂质辫状河储层构型特征

发布时间：2018-08-01 13:15

【摘要】：随着油田开发进入中后期,油水关系更加复杂,剩余油挖潜难度随之增大,基于储层构型的精细地质研究成为油田剩余油挖潜的关键。综合利用露头、岩心、现代沉积和密井网等资料,应用层次界面分析法,深入解剖渤海海域L油田4区砂质辫状河储层构型特征。以构型倒序分级方案为基础,参考构型正序分级方案,将研究区辫状河储层构型界面分为6—12个级次。依据砂质辫状河储层经验公式、现代沉积和密井网井间对比,分级次对砂质辫状河单一辫流带、心滩坝和辫状河道及心滩坝内部夹层进行定量表征,形成一套适用于砂质辫状河储层不同级次构型单元的定量表征方法;明确单一辫流带级次、心滩坝和辫状河道级次及心滩坝内部夹层级次3个层次的构型特征。提出辫状河道具有砂质充填、半泥质充填、泥质充填和残存泥质充填4种充填模式,并分析不同充填模式的成因。
[Abstract]:With the development of oil field entering the middle and late stage, the relationship between oil and water becomes more complex, and the difficulty of tapping the potential of remaining oil increases. The fine geological research based on reservoir configuration becomes the key to tapping the potential of remaining oil in oil field. Based on the data of outcrop, core, modern sedimentation and dense well pattern, the structural characteristics of sandy braided river reservoir in L oilfield in Bohai Sea are deeply dissected by using the analytic hierarchy process (AHP). Based on the inverted sequence classification scheme and referring to the normal sequence classification scheme, the structural interface of braided river reservoir in the study area is divided into 6 to 12 stages. According to the empirical formula of sandy braided river reservoir, modern sedimentary and dense well pattern interwell correlation, the single braided flow zone of sandy braided river, the inner intercalation of Xintan dam and braided channel and the inner intercalation of Xintan dam are quantitatively characterized. A set of quantitative characterization methods suitable for different order configuration units of sandy braided river reservoir are formed, and the configuration characteristics of three levels of single braided flow belt grade, Xintan dam and braided river channel grade and inner intercalation grade of Xintan dam are clarified. Four filling models of braided channel, including sandy filling, semi-muddy filling, muddy filling and residual muddy filling, are put forward, and the causes of different filling models are analyzed.
【作者单位】：中海石油(中国)有限公司天津分公司;
【基金】：国家科技重大专项“渤海油田加密调整及提高采收率油藏工程技术示范”(2016ZX05058-001)
【分类号】：P618.13

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