大庆头台油田茂10-茂11区块扶余油层复合砂体内部构型及其剩余油类型研究

发布时间：2018-05-06 09:45

  本文选题：头台油田 + 扶余油层　； 参考：《东北石油大学》2017年硕士论文

【摘要】：大庆头台油田茂10-茂11区块已进入开发后期阶段,仍有相当数量的剩余油分布在地下储层中。主要受储层构型的控制,剩余油的分布特征表现为总体分散,局部集中。本文采用“层次分析”的研究思路,提出了一套地下曲流河及曲流型分流河道内部储层构型分析方法,进一步总结出不同规模构型要素控制的剩余油类型,为该区的进一步开发提供有力的地质基础。根据测井资料、岩心资料和物性资料,对研究区扶余油层复合砂体的分布特征和物性特征进行了全面认识,结合地层精细对比理论和沉积模式,利用沉积间歇面对复合砂体进行劈分,完成了扶余油层566口井34个沉积时间单元的精细划分和统层对比。在地层精细划分与对比基础上,利用砂厚、砂地比、密井网区解剖法,确定物源为西南方向。结合岩心特征观察,识别出了2类相3类亚相22类沉积微相并建立了相应的测井相模式,完成扶余油层34个沉积时间单元的平面沉积微相组合,并按照不同沉积亚相的河道规模对不同沉积时间单元进行了分类,对储层有了深刻的认识。在各沉积时间单元沉积微相刻画基础上,总结了废弃河道、河道附近的相变、河道砂体高程差异、河道砂体厚度差异等四种方式来确定单一河道边界。在单一河道识别基础上,识别点坝,结合野外露头、岩心资料、经验公式,求取点坝内部侧积层参数,得出侧积层的倾角3°~11°,侧积层的个数2~5个,侧积层倾向总是由垂直于废弃河道正切点切线方向由凸岸指向凹岸,侧积层大小为10~120m。在储层构型分析基础上,建立水淹解释图版,绘制了重点层水淹程度分布图,全面了解剩余油的分布情况。将储层构型和剩余油结合起来,总结了复合砂体构型控制剩余油的3种类型。即复合河道内河道间干扰及平面相变形成的剩余油;单河道砂体内部正韵律及废弃河道遮挡形成的剩余油;点坝内部薄夹层遮挡形成的剩余油。
[Abstract]:Mao-10- Mao-11 block in Daqing Toutai Oilfield has entered the late stage of development, and a considerable amount of remaining oil is still distributed in the underground reservoir. Mainly controlled by reservoir configuration, the distribution characteristics of remaining oil are overall dispersion and local concentration. In this paper, a set of methods of reservoir configuration analysis of underground meandering river and meandering distributary channel are put forward, and the remaining oil types controlled by different scale configuration elements are summarized. To provide a strong geological basis for the further development of the area. Based on the well logging data, core data and physical property data, the distribution and physical properties of Fuyu reservoir composite sand body in the study area are comprehensively understood, combined with the theory of fine correlation of formation and the sedimentary model. The fine division of 34 sedimentary time units of 566 wells in Fuyu oil reservoir and the correlation of the formation of the series have been accomplished by dividing the sedimentary intermittently against the composite sand body. On the basis of fine stratigraphic division and correlation, by using the method of sand thickness, sand to ground ratio and the anatomy of dense well pattern, the source of material is determined to be southwest direction. Based on the observation of core characteristics, two types of facies, three types of subfacies and 22 types of sedimentary microfacies are identified, and the corresponding logging facies model is established. The planar sedimentary microfacies combination of 34 sedimentary time units in Fuyu reservoir is completed. The different sedimentary time units are classified according to the river scale of different sedimentary subfacies, and the reservoir is deeply understood. On the basis of sedimentary microfacies characterization of each sedimentary time unit, four ways to determine the single channel boundary are summarized, such as the abandoned channel, the phase transition near the channel, the elevation difference of the channel sand body, and the thickness difference of the channel sand body. On the basis of single channel identification, the point dam is identified, combined with field outcrop, core data and empirical formula, the parameters of the inner side layer of the point dam are obtained, and the inclination angle of the lateral accumulated layer is 3 掳~ 11 掳, and the number of the lateral accumulated layer is 2 ~ 5. The lateral accumulation tends from the tangent direction perpendicular to the tangent point of the abandoned river channel from the convex bank to the concave bank, and the lateral accumulated layer is 10 ~ 120m in size. On the basis of reservoir configuration analysis, the water-flooded interpretation chart was established, and the distribution map of water-flooded degree in key layers was drawn, and the distribution of remaining oil was fully understood. By combining reservoir configuration with remaining oil, three types of remaining oil controlled by composite sand body configuration are summarized. That is the residual oil formed by interchannel interference and plane phase change in the composite channel, the remaining oil formed by the positive rhythm in the sand body of a single channel and the residual oil formed by the shading of the abandoned channel, and the remaining oil formed by the thin interlayer in the point dam.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE327;P618.13
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本文编号：1851831