苏里格气田苏15-苏10井区储层特征研究

发布时间：2018-03-16 23:05

本文选题：苏15—苏10井区　切入点：地层特征　出处：《西北大学》2015年硕士论文　论文类型：学位论文

【摘要】：苏15一苏10井区是长庆油田和长城钻探的合作区,地处鄂尔多斯盆地苏里格气田中区北部,含气储层主要为中二叠统下石盒子组盒8段、下二叠统山西组山1段。已有资料显示该区块二叠系盒8、山1段砂岩广泛分布,厚度、岩相、物性变化较快,迄今为止缺乏对研究区盒8、山1段的地层特征、沉积相、砂体分布、储层的物性变化系统、深入的研究。深入研究苏15—苏10井区二叠系盒8、山1段储层特征,对该区的后续勘探开发有重要的指导意义。本论文以苏15—苏10井区的的钻井、录井、测井以及分析化验资料为前提,结合前人们的研究结果,对研究区地层进行精细划分,并对划分结果反复对比。在对地层进行精细划分对比的基础上,对研究区块的沉积特征、砂体展布特征、储层的岩性特征、物性特征、孔隙结构、非均质性以及影响因素展开深入细致的研究。研究结果表明：研究区构造活动不明显,包括石盒子组、山西组在内的现有各组地层均连续分布,含气储层盒8段地层厚度相对稳定,盒8下段厚度略微大于盒8上段,山1段地层东薄西厚,南北向厚度变化不大；研究区属典型的河流相沉积,盒8段主要为辫状河沉积形成,山1段曲流河相对发育；砂体有北厚南薄的趋势,走向近南北向,盒8下段较厚,连续性最好,山1、盒8上段次之；盒8段、山1段岩性均为岩屑石英砂岩,天然气储集空间以岩屑与杂基溶蚀孔隙为主,孔吼组合类型有低孔微吼、中孔中吼以及低孔细吼三种,具有低孔、低渗和非均质性强的特点；储层物性表现出低孔、低渗的特征,盒8上段平均孔隙度是9.66%,平均渗透率是1.031×10-3μm2；盒8下段平均孔隙度是10.02%,平均渗透率是1.728×10-3μm2；山1段平均孔隙度是9.99%,平均渗透率是1.402x10-3μm2,盒8下段物性最好,为最有利储层发育层段。苏15—苏10井区二叠系盒8、山1段储层的发育及分布规律受到沉积作用的严格控制,沉积作用形成的粗砂岩为含气储层。
[Abstract]:The Su-15-Su-10 well area is a cooperative area for Changqing Oilfield and the Great Wall drilling. It is located in the northern part of Sulige Gas Field, Ordos Basin. The gas-bearing reservoir is mainly Bo8 member of Lower Shihezi formation in the Middle Permian. The previous data show that the sandstone of Shan1 member is widely distributed, thickness, lithofacies and physical properties change rapidly. So far, there is a lack of stratigraphic characteristics and sedimentary facies of Bo8 and Shan 1 member in the study area. Sand body distribution, reservoir physical property change system, in-depth study. Further study on reservoir characteristics of the Permian Jiao8 and Shan 1 member in Su15-Su 10 well area, This paper is based on the drilling, logging, logging and analysis of laboratory data in Su-15-S10 well area, combined with the results of previous studies, the formation of the study area is divided into fine sections. On the basis of fine division and correlation of strata, the sedimentary characteristics, distribution characteristics of sand bodies, lithologic characteristics of reservoir, physical characteristics, pore structure of the study block are studied. The results show that the tectonic activity in the study area is not obvious, and the existing strata, including Shihezi formation and Shanxi formation, are distributed continuously. The formation thickness of the gas bearing reservoir is relatively stable, the thickness of the lower member of the formation is slightly larger than that of the upper part of the formation, the strata of the first member of Shan are thick from east to west, and the thickness from south to north has little change, and the study area is a typical fluvial facies deposit. Bo8 is mainly composed of braided river deposits, and the meandering rivers of member 1 are relatively developed. The sand bodies tend to be thick and thin in the north and south, with the thicker and the best continuity in the lower part of box 8, followed by the upper member of Shan 1 and the upper part of box 8, and the section 8 of box 8. The lithology of member 1 is lithic quartz sandstone. The natural gas reservoir space is dominated by lithic and complex dissolution pores. The combination types of porosity and roar are low porosity, low porosity and low porosity, which have the characteristics of low porosity, low permeability and strong heterogeneity. Reservoir physical properties are characterized by low porosity and low permeability. The average porosity of the upper part of box 8 is 9.66, the average permeability is 1.031 脳 10 ~ (-3) 渭 m ~ (2), the average porosity of the lower part of box 8 is 10.02, the average permeability is 1.728 脳 10 ~ (-3) 渭 m ~ (2), the average porosity of Shan 1 is 9.99 and the average permeability is 1.402 脳 10 ~ (-3) 渭 m ~ (2). The reservoir development and distribution law of Shan 1 member is strictly controlled by sedimentation, and the coarse sandstone formed by sedimentation is gas bearing reservoir.
【学位授予单位】：西北大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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