绥中36-1油田湖相三角洲前缘储层构型模式

发布时间：2018-01-08 07:36

  本文关键词：绥中36-1油田湖相三角洲前缘储层构型模式　出处：《中国地质大学(北京)》2017年硕士论文　论文类型：学位论文

  更多相关文章： 界面 构型 河口坝 三角洲前缘 绥中36-1油田

【摘要】：绥中36-1油田地处渤海湾盆地,具体位于辽东湾下辽河凹陷辽西低凸起中部,是一个断裂背斜油气藏。经过30年的开发,综合含水高达75%以上,高压差、高出程度及注采井网不完善导致油田纵向和平面注采的不平衡和油层动用不平衡;储层平面、层间和层内非均质性导致高渗条带和平面剩余油分布不清楚,根本原因是小层砂体内部构型即多级次的储层单元和渗流屏障导致的储层单元内部质量差异,因此本次研究将对该区三角洲前缘储层的构型进行精细的分级解剖,从而为今后完善井网和调整开发提供参考。论文以测井资料丰富的东营组东二段Ⅰ油组为研究对象,以绥中36-1油田岩心、测井、分析化验资料和动态资料为基础,通过沉积学方法和层序地层学方法对研究区储层构型逐级解剖。在总结前人研究的基础上,确认了研究区东二段上段时期双物源的沉积模式,通过岩性特征、沉积构造和测井数据的分析,认为研究区西部古绥中水系的沉积模式为辫状河三角洲沉积,而研究区东部古复州水系的沉积模式为曲流河三角洲沉积。在沉积模式的指导下,将东二段Ⅰ油组划分6级构型单元,并在全区内对2级和3级构型单元对比。在构型单元划分的基础上,逐级解剖构型单元,其中2级构型单元有两种类型,分别是曲流河三角洲和辫状河三角洲,重点对3级构型单元类型展开分析,主要3级构型单元类型有水下分流河道、河口坝和前缘席状砂等,并描绘了不同类型3级构型单元的垂向和横向接触关系、剖面模式以及平面分布模式。由于4级构型单元的连续性较差,无法在全区范围内进行4级构型界面的对比,因此在对4级构型单元的研究时,精选河口坝型4级构型单元作为研究对象,并在研究区内部精选河口坝研究区A-C。将河口坝构型单元解剖为构型界面、增生体和泥质披覆体三大要素,把4级构型单元增生体分为退积型、加积型和进积型三类,同时计算了增生体间夹层的产状和分布模式,并在剖面上刻画了构型要素的分布和4级构型单元的接触关系。
[Abstract]:Suizhong 36-1 oil field is located in the Bohai Bay basin, located in the middle of the low uplift in the west of Liaohe sag, Liaodong Bay, and is a faulted anticline reservoir. After 30 years of development, the comprehensive water content is more than 75%. The difference of high pressure, high degree of production and imperfect pattern of injection-production well lead to the imbalance of vertical and plane injection and production and the unbalance of reservoir production. The heterogeneity of reservoir plane, interlayer and intra-layer leads to unclear distribution of high permeability strip and plane residual oil. The fundamental reason is that the internal quality of the reservoir unit is different due to the configuration of the small sand body, that is, the multi-stage reservoir unit and the percolation barrier. Therefore, this study will carry on the fine classification anatomy to the delta front reservoir configuration in this area. So as to provide a reference for the future improvement of well pattern and adjustment and development. This paper takes Dongying formation of Dongying formation with abundant logging data as the research object and takes the core of Suizhong 36-1 oilfield as the research object. Based on the analysis of laboratory data and dynamic data, the reservoir configuration in the study area was dissected by sedimentology and sequence stratigraphy. Through the analysis of lithologic characteristics, sedimentary structure and logging data, it is considered that the sedimentary model of paleo-Suizhong drainage system in the western part of the study area is braided river delta deposit. The sedimentary model of the paleofuzhou drainage system in the eastern part of the study area is meandering river delta deposition. Under the guidance of the sedimentary model, the oil formation 鈪，

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