子洲气田山2储层扩边潜力评价及有利区筛选

发布时间：2018-01-13 10:28

  本文关键词：子洲气田山2储层扩边潜力评价及有利区筛选　出处：《西安石油大学》2015年硕士论文　论文类型：学位论文

  更多相关文章： 子洲气田 山2段 储层评价 有利区筛选

【摘要】：子洲气田目前投产较早的气井井口压力下降快、低效井增多,对气田稳产提出了挑战。综合利用测井数据、岩心观察和大量的实验测试结果,将宏观与微观结合、从定性分析到定量评价,系统研究了气田及其周边地区的构造特征、沉积微相与砂体展布特征,储层特征和成岩作用,在此基础上进行了扩边潜力评价,筛选了有利目标区。(1)研究区的构造基本继承了鄂尔多斯盆地区域构造的整体特征,自北向南发育了多个大小不一的鼻隆构造,主要分布在台8井、榆143井、榆39井等周围区域,而且鼻状构造有良好的继承性。(2)研究区山23段主要发育三角洲平原沉积,平面上,发育多支分流河道,在气田中部多支河道交汇。垂向上,发育多期河道,相互叠置。山23段砂体呈近南北向展布,呈厚层块状或垂向叠置型,横向连通性好,单层厚度多在2.5~6m不等,最大可达近10m。(3)研究区山23气层组岩性以石英砂岩为主,孔隙类型包括残余粒间孔、溶孔及晶间微孔,孔隙组合类型主要为粒间孔-溶孔型,喉道类型以可变断面的收缩部分为主,其次是片状或弯片状喉道。参考多项指标,可划分出6种成岩相,高岭石+石英加大胶结弱溶蚀相分布最为广泛。(4)根据上述分析结果,研究区山23段储层可划分为Ⅰ、Ⅱ、Ⅲ和Ⅳ四个类别,在储层评价的基础上,建立了主力层系山23有利区优选标准,筛选出有利区Ⅰ类、Ⅱ类和Ⅲ类储层,为进一步勘探开发子洲气田提供了依据。
[Abstract]:At present, the wellhead pressure of gas wells in Zizhou gas field which was put into production earlier has dropped rapidly, and the number of inefficient wells has increased, which poses a challenge to the stable production of the gas field. Comprehensive use of logging data, core observation and a large number of experimental test results. Combining macro and micro, from qualitative analysis to quantitative evaluation, the structural characteristics, distribution characteristics of sedimentary microfacies and sand bodies, reservoir characteristics and diagenesis of the gas field and its surrounding areas are systematically studied. On the basis of this, the potentiality of the extension is evaluated, and the favorable target area. 1) the structure of the study area basically inherits the overall characteristics of the regional structure of the Ordos basin. From north to south, a number of nasal uplift structures of different sizes have been developed, mainly distributed in the surrounding areas of well Tai 8, well Yu 143, well Yu 39 and so on. Moreover, the nose structure has a good inheritance. 2) the mountain 23 member of the study area is mainly developed delta plain sediments, on the plane, there are many distributary channels, and many channels meet vertically in the middle of the gas field. The sand bodies of member 23 are distributed in the direction of north to south, with thick layer block or vertical superposition, good transverse connectivity, and the thickness of single layer varies from 2.5m to 6m. The lithology of Shan 23 gas formation in the study area is mainly composed of quartz sandstone. The pore types include residual intergranular pore, dissolved pore and intergranular micropore, and the pore assemblage type is mainly intergranular porosity and dissolved pore type. The main type of throat is the contraction part of the variable section, followed by the flake or curved throat. Six diagenetic facies can be classified by referring to many indexes. According to the above analysis results, the reservoir of Shan23 member in the study area can be divided into four categories: I, II, III and 鈪，

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