大庆油田杏树岗一～三区西部萨尔图油层组沉积模式及井间砂体匹配模式分析

发布时间：2018-06-19 02:55

  本文选题：杏树岗一~三区西部 + 萨尔图油层组　； 参考：《东北石油大学》2017年硕士论文

【摘要】：大庆油田杏树岗地区非主力油层已进入开发后期,为配合杏一~三区西部非主力油层三次采油规划设计,需要对非主力油层进行精细解剖研究。而关于研究区内三角洲前缘亚相砂体沉积模式、前缘亚相储层河道砂体与河道边部砂体井间连通模式的研究还有所欠缺。本文利用测井资料、取心井岩心资料等多种数据,在密井网区的基础上精细解剖不同环境与类型下的储层,明确地下砂体空间分布规律。通过时间单元划分与对比技术建立杏树岗一~三区西部2567口井49个时间单元的等时地层格架。分析取心井沉积微相特征,明确研究区内共有三角洲1相、1亚相、6微相,再根据不同沉积微相类型及特征建立测井相模式。在前期工作的基础上逐井逐层开展平面沉积微相精细识别工作,绘制了49张沉积微相图。在明确了各个沉积时间单元沉积微相砂体的展布规律后,开展沉积环境演化规律研究工作与储层砂体沉积模式分析工作。明确萨Ⅱ—萨Ⅲ沉积环境演化规律即整体为湖泛扩大,沉积环境由三角洲内前缘亚相向前三角洲亚相过渡,共识别出研究区内水下分流河道砂体主要有2种分布模式,水下薄层砂体主要有3种分布模式,建立研究区储层砂体4种沉积模式。识别出井间砂体垂向叠置模式3种,平面接触模式8种,空间匹配模式3种。在此基础上针对非主力层内6个重点时间单元,分析砂体与井网间不同匹配模式分布规律,给出下一步注采井网调整区域。为该研究区非主力油层的进一步开发提供地质基础。
[Abstract]:The non-main reservoirs in Xingshugang area of Daqing Oilfield have entered the late stage of development. In order to cooperate with the planning and design of the tertiary production of non-main oil reservoirs in the western part of Xingyi ~ III area, it is necessary to carry out detailed anatomical research on the non-main reservoirs. However, the study on the sedimentary model of delta front subfacies sand body and the model of well communication between channel sand body and channel edge sand body in front subfacies reservoir is still lacking. In this paper, by using logging data and core data of core wells, the reservoir under different environments and types is carefully dissected on the basis of dense well pattern, and the spatial distribution law of underground sand body is determined. The isochronous stratigraphic framework of 49 time units of 2567 wells in the west of Xingshugang area 1 ~ 3 is established by time unit division and correlation technique. Based on the analysis of sedimentary microfacies in core wells, it is clear that there are 1 and 1 subfacies and 6 microfacies in delta in the study area, and then the logging facies model is established according to different sedimentary microfacies types and characteristics. On the basis of previous work, fine identification of planar sedimentary microfacies is carried out, and 49 sedimentary microfacies diagrams are drawn. After the distribution of sedimentary microfacies sand bodies in each sedimentary time unit has been clarified, the study of sedimentary environment evolution law and the analysis of sedimentary model of reservoir sand bodies have been carried out. It is clear that the evolution law of the sedimentary environment of sa 鈪，

本文编号：2038069