【作者】 黄文科；

【导师】 窦之林； 戴俊生；

【作者基本信息】 中国石油大学 ， 矿产普查与勘探， 2007， 硕士

【摘要】 应用Miall建筑结构分析法研究胜坨油田二区沙二段34小层砂体内部建筑结构:根据取心井岩心观察识别出12种岩相类型;通过岩心观察,连井剖面对比和测井曲线识别,采用层次分析的思路定义了6级界面;在岩相识别和界面划分的基础上划分出8种结构要素:河道滞留沉积(CHL)、河道充填(CH)、纵向砂坝(LB)、横向砂坝(TB)、落淤层(FS)、越岸细粒沉积(OF)、决口扇(CS)和洪泛平原细粒(FF);建立了34砂体建筑结构平面和剖面组合模式:平面以河道充填(CH)和砂坝(CB)为主,剖面上可分为3个层次:下部为河道滞留沉积(CHL);中部为河道充填(CH)和砂坝(CB)沉积;上部为越岸细粒沉积(OF)。确定了34小层砂体为细粒砂质辫状河沉积模式。建立了34砂体流动单元模型,划分出了E、M、P等三种流动单元类型。将两种模型对比研究得出建筑结构和流动单元具有很好的对应关系,二者都是按照沉积体内部水动力条件变化所划分出来的储集体,具有相似储集条件的流动单元和建筑结构单元具有相同的平面和空间分布范围。同时研究了在建筑结构模型控制下砂体内部剩余油的分布规律:储集物性较差的建筑结构的大部分区域有剩余油分布,储集性能较好的建筑结构单元的边缘部位和不同类型建筑结构单元的交界部位也有剩余油分布。更多还原

【Abstract】 Using Miall’s architectural elements analysis, the reservoir architecture of Es234 subbed in ShengTuo oil field was researched. Twelve types of lithofacies were distinguished by core survey. Based on core survey, correlations of connecting-well sections and recognition of log curves, six scales of bounding surfaces were defined with the conception of stratification. By the recognition of lithofacies and the classification of sequences, eight kinds of architectural elements were identified. They were channel full sediment (CH), channel retention sediment (CHL), sandbar(CB), fall-siltseam (FS), overbankfine (OF), crevassesplay (CS), chondro of flood plain facies (FF). Finally the planar and sectional assemblage models of architecture of 34 sand body were established. Channel full sediment (CH) and sandbar (CB) were the main architectural elements in the plane and three hierarchies were divided in the section. The lower part was channel retention sediment (CHL); the middle part was channel full sediment (CH) and channel bar (CB); the lower part was chondro of overbankfine (OF). Also the sedimentary model of 34 sand body was established as aphanitic sandy anastomosed stream. The flow unit of Es234 sand body was divided into three kinds and they are E, M, P. These two models were divided by the diversification of hydrodynamic condition in the lithosomic body and had a fine correspondent relationship. The flow unit and architectural elements which were of the similar reservoir condition, had the same distribution both in plane and space. The distribution of remaining oil which was controlled by the architectural elements was also analyzed. The remaining oil mainly distributes in three places. One is most part of the architecture elements of bad reservoir physical property. The other is the boundary of architecture elements of good reservoir physical property and the boardland of different architectural elements.更多还原