英东地区沉积储层特征及主控因素分析

发布时间：2018-01-26 18:51

本文关键词： 英东油田沉积特征储层评价　出处：《中国石油大学(华东)》2015年硕士论文　论文类型：学位论文

【摘要】：2010年柴达木盆地英东地区一号构造砂37井在上第三系获得工业油流,正式拉开了英东地区的勘探序幕,2010年英东一号N21-N22油气藏已申报预测石油地质储量亿吨级以上。英东油田是青海油田公司及中国石油未来几年的重点勘探区快。英东油田具有特殊的地质特征,储层层数多而且薄、粒度细、含油井段长、断裂系统复杂,国内外类似的油田比较罕见,可以提供借鉴的勘探经验比较少,加强沉积储层研究,准确寻找有利储集体是油气勘探的核心问题。本文通过对英东地区沉积储层特征综合性研究,划分该区物源体系、沉积微相,明确砂体展布,分析控制储层演化的主要因素,预测有利储层的展布,提出有利勘探靶区。研究表明,英东地区发育有辫状三角洲前缘亚相和滨浅湖亚相,有利相带为辫状三角洲前缘亚相的分流河道主体部位;英东地区主力油层的储层孔隙类型主要以原生粒间孔为主,次为溶蚀孔,少量的裂隙孔,物性及孔隙结构较好。主力油层属于浅埋藏孔隙型储层,压实作用是主控因素、胶结是次要因素,沉积微相、原始组构及胶结物含量控制着储层物性差异。根据英东地区的储层特征总结出了“有砂即储”的规律,并指出其油气勘探的重点在于寻找有利沉积相带及砂体。
[Abstract]:In 2010, the No. 1 structural sand 37 well in Yingdong area of Qaidam Basin obtained the industrial oil flow in the Neogene system, which officially opened the prelude to the exploration in the Yingdong area. In 2010, Yindong No.1 N21-N22 oil and gas reservoir has been declared and predicted petroleum geological reserves of more than 100 million tons. Yingdong Oilfield is a key exploration area for Qinghai Oilfield Company and PetroChina in the next few years. Special geological features. The reservoir has many thin layers, fine granularity, long oil well formation, complex fault system, relatively rare similar oil fields at home and abroad, which can provide less exploration experience and strengthen sedimentary reservoir research. It is the core problem of oil and gas exploration to find the favorable reservoir accurately. This paper divides the source system, sedimentary microfacies and the distribution of sand body through the comprehensive study of sedimentary reservoir characteristics in Yingdong area. The main factors controlling reservoir evolution are analyzed, the distribution of favorable reservoirs is predicted, and favorable exploration targets are proposed. The study shows that there are braided delta front subfacies and shore-shallow lacustrine subfacies in Yidong area. The favorable facies zone is the main part of distributary channel in the front subfacies of braided delta. The main reservoir pore types in Yingdong area are mainly primary intergranular pore, secondary solution pore, a small number of fissure pores, good physical properties and pore structure, and the main reservoir belongs to shallow buried pore reservoir. Compaction is the main controlling factor, and cementation is the secondary factor. Sedimentary microfacies, primitive fabric and cement content control the difference of reservoir physical properties. According to the reservoir characteristics of Yingdong area, the rule of "sand is reservoir" is summarized. It is pointed out that the key point of oil and gas exploration is to find favorable sedimentary facies and sand bodies.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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