靖边油田关草涧油区延长组主力油藏精细描述

发布时间：2018-04-11 15:52

  本文选题：关草涧油区 + 沉积微相　； 参考：《西安石油大学》2017年硕士论文

【摘要】：研究区位于杨米涧关草涧乡,由于该区地质条件复杂,从而导致对地质的认识情况不足,影响后期的开采。因此针对上述问题,本文在前人的研究基础上掌握了研究区的构造背景和地层特征,在区域标志层的控制下,以沉积旋回为基础,参考地层厚度,对研究区的两个主力层段长4+5,长6进行了划分。通过单井相、沉积微相剖面图及平面图,对研究区沉积特征进行了全面分析。从储层的岩石学特征入手,通过物性分析和成岩作用了解储层的物性,非均质性,敏感性等特征。并在此基础上对储层做出了分类与评价。研究表明研究区主要发育为三角洲前缘水下分流河道砂体,平面上发育有多支河道并且具有一定的继承性;储集层以细砂岩、粉砂岩为主,储层砂岩孔隙类型主要是粒间孔,其次是溶蚀孔,裂隙基本不发育。长4+5储层多属于中-小孔隙,喉道类型为片状和弯片状,孔隙结构为Ⅰ和Ⅱ类;长6储层为中-大孔隙,喉道类型为缩颈型,孔隙结构为Ⅱ类和Ⅲ类。研究区的非均质性较强。在对储层进行分析的基础上通过主要参数对储层进行了分类与评价,将其分为A,B,C三类,并以B类储层为主。本论文的研究进一步加深了对该储层特征和沉积相的研究,这对油田产量持续稳定增加,提高油田的开采效率将有着重要指导意义。
[Abstract]:The study area is located in Yangmijian Guancaojian Township. Because of the complex geological conditions in this area, the understanding of geology is insufficient, which affects the later mining.Therefore, in view of the above problems, this paper grasps the tectonic background and stratigraphic characteristics of the study area on the basis of previous studies. Under the control of the regional marker layer, based on the sedimentary cycle, the paper refers to the thickness of the stratum.The two main layers of the study area are divided into 4 5 and 6 sections.Based on the single well facies, sedimentary microfacies profile and plane diagram, the sedimentary characteristics of the study area are comprehensively analyzed.Based on the petrological characteristics of the reservoir, the physical properties, heterogeneity and sensitivity of the reservoir are studied through physical property analysis and diagenesis.On this basis, the reservoir is classified and evaluated.The study shows that the study area is mainly developed into delta front underwater distributary channel sand body, there are many river channels developed on the plane and have certain inheritance, the reservoir is mainly composed of fine sandstone and siltstone, and the pore type of reservoir sandstone is mainly intergranular pore.The second is the corrosion hole, the crack is basically not developed.Chang 45 reservoir mostly belongs to medium-small pore, throat type is flaky and curved, pore structure is 鈪，

本文编号：1736656