目前大庆油田已进入高含水开发阶段,厚油层内剩余油的挖潜成为重要的研究内容.厚油层内隔夹层的存在使其内部非均质性更加复杂,进而严重影响剩余油的分布.以大庆油田北一区断东为研究区,研究厚砂劈分及隔夹层特征,为厚油层内剩余油的挖潜提供可靠的依据.首先利用研究区目的层的沉积特征和测井资料确定了复合砂体的可分性,其次确定不同期次河道砂体间沉积的隔夹层为复合砂体的劈分依据,最后根据成因和岩性将隔夹层划分为泥质夹层、钙质夹层和物性夹层三种类型.将复合砂体劈分与隔夹层结合研究.%At present the Daqing oilfield has entered the high water cut stage, and tapping remaining oil in thick oil reservoirs has become a major subject. The inner interlayers caused strong heterogeneity of thick oil reservoirs, and made the distribution of the remaining oil more complex. The east of the fault block in taken in Beiyi district of Daqing oilfield as the target area, to study the disjoining of thick sandbodies and the characteristics of inner interlayers and to provide a reliable evidence for tapping the remaining oil in the thick oil reservoirs. First, on the basis of sedimentary characteristics and logging data , the separability of the complex sand-body have been confirmed. Second, the inner layers deposited have been determined between different channels as a separability proof of the complex sand-body. Lastly, through the study on the causes and lithology, the interlayers have been divided into three types, that is muddy interlayers, calcareous interlayers and physical interlayers. The disjoining of complex sand-body with the interlayers has be tried to combined.
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