油砂山网状河三角洲沉积体系与构型分析

发布时间：2018-01-08 01:17

  本文关键词：油砂山网状河三角洲沉积体系与构型分析　出处：《燕山大学》2015年硕士论文　论文类型：学位论文

  更多相关文章： 油砂山油田 网状河三角洲 滨浅湖 层次性分析 构型单元

【摘要】：油砂山油田油层层数多、厚度薄、分布散,断层发育、构造复杂。基础地质研究环节比较薄弱,油层动用程度低,开发效果不理想。该论文的目的就是利用岩心、测井和地面露头资料查明其沉积体系、沉积微相,建立沉积模式,分析砂体的构型,为油田下一步上产稳产打好基础。本文以油砂山油田为研究对象,结合区域背景资料,在对露头详细观察、测量、编图和分析的基础上,通过岩心、化验分析资料和测井资料的深入研究,认为研究区目的层段属典型的网状河三角洲-滨浅湖沉积体系。根据岩性、沉积构造、测井相、砂体形态、纵向序列以及露头小尺度的解剖,把目的层段划分为网状河三角洲平原、三角洲前缘、前三角洲、滨浅湖4个亚相,并进一步细分出12种微相。详细分析了各微相的沉积特征、演化规律,以及对油气的控制作用,建立了网状河三角洲-滨浅湖体系的沉积模式。沉积微相中的水下分流河道、河口砂坝和席状砂的储层物性比较好,油气储量丰度高,这三种沉积微相控制的油气储量总和占总储量的76.67%;滩砂、远岸砂坝、水下天然堤和滩坝砂体储层物性差,砂体厚度薄,油气储量丰度相对较低,分别占总储量的7.01%,5.88%,5.10%和2.36%。三角洲平原网状河道微相虽然粒度粗、砂体厚度大、物性好,但在断层发育的油砂山油田中封闭性差,储量丰度低,仅占总储量的2.98%。利用层次分析和旋忯性对比方法,将油砂山油田储层构型划分为八级层次,11种构型单元:网状河道、决口沉积单元、水下分流河道(主河道)、水下分流河道测缘、水下天然堤、坝核、坝侧缘、席状砂、滩坝、滩砂、远岸砂坝。各单元在平面上存在2种拼合关系,即连续过渡型和突变接触型;剖面上存在3种叠置关系,即冲刷充填型、叠置接触型、孤立分布型。完善了网状河三角洲-滨浅湖沉积体系的地质知识库,为后续的储层随机地质建模和开发方案调整奠定了基础。
[Abstract]:Youshashan oilfield reservoir layers, the thickness of thin, scattered distribution, fault development, structure is complex. Part of basic geological research is relatively weak, the reservoir development degree is low, the effect is not ideal. The purpose of the paper is based on the core, logging and outcrop data to identify the sedimentary system, sedimentary microfacies, sedimentary model establishment, analysis the sand body configuration, lay the foundation for the next oil production stable. In Youshashan oilfield as the research object, combined with the regional background, in the measurement of outcrop detailed observation, based mapping and analysis, through in-depth study of rock, laboratory analysis data and logging data, to think the study area belongs to Braided River Delta - typical shore shallow lake sedimentary system. According to the lithology, sedimentary structure, logging facies, sand body morphology, anatomy and vertical sequence of small scale outcrop, the interval is divided into Braided River Delta plain, 涓夎�掓床鍓嶇迹�

本文编号：1395031