克拉玛依油田九8区储层构型对汽窜影响规律研究

发布时间：2018-02-01 04:52

本文关键词： 储层构型辫状河汽窜齐古组九8区　出处：《中国地质大学(北京)》2015年硕士论文　论文类型：学位论文

【摘要】：河流相稠油油藏岩相变化快,非均质性强,汽窜严重,严重影响了开发效果,对河流相稠油储层进行构型研究,可以为此类油藏汽窜防治提供地质依据。本文以克拉玛依油田九8区齐古组为例,以储层沉积学原理为指导,综合应用露头、岩心、测井、地震和动态资料,对辫状河储层进行构型分析。在精细地层对比的基础上,识别了沉积相类型,分析了各沉积微相特征,并通过露头、现代沉积与密井网相结合对辫状河储层进行了构型表征,分析了各级次构型界面对汽窜的影响因素。研究表明,九8区齐古组为典型的辫状河特征,河道和心滩是储层发育的主力砂体。泛滥平原、泥质(半)填充河道以及心滩内部落淤层为主要的渗流屏障,在研究区东部和西部侧向遮挡较为发育,主要为5级的泛滥平原和4级的泥质(半)充填河道;夹层主要为3级的落淤层,当夹层发育跨度在2个井距以上时对蒸汽波及和汽窜均有明显的影响。进一步研究汽窜与储层质量、吞吐轮次、注汽强度等相互关系。从储层质量控制汽窜的角度,对潜在的汽窜通道类型的划分和识别,刻画汽窜通道在井筒中的位置;结合动静态资料及操作参数综合分析得到注汽强度与汽窜发生的定量标准。为九8区及类似油藏的汽窜预防、提高采收率,提供依据。
[Abstract]:Fluvial heavy oil reservoir is characterized by rapid lithofacies change, strong heterogeneity and serious steam channeling, which seriously affects the development effect. The configuration of fluvial heavy oil reservoir is studied. This paper takes Qigu formation of Jiagu formation in Karamay Oilfield as an example, taking the principle of reservoir sedimentology as a guide, synthetically applies outcrop, core, logging, seismic and dynamic data. On the basis of fine stratigraphic correlation, the types of sedimentary facies are identified, the characteristics of each sedimentary microfacies are analyzed, and through outcrop, the structure of braided river reservoir is analyzed. The structural characterization of braided river reservoir is carried out by combining modern sedimentation and dense well pattern, and the influence factors on steam channeling of various sub-tectonic interfaces are analyzed. The study shows that Qigu formation in area 98 is a typical braided river feature. Channel and Xintan are the main sand bodies in reservoir development. In flood plain, muddy (semi-filled) channel and tribal silt layer in Xintan are the main seepage barriers, and lateral shielding is more developed in the east and west of the study area. It mainly consists of 5 grade flood plain and 4 grade muddy (semi) filling channel. The intercalation is mainly three grade desilting layers. When the intercalation span is more than 2 well spacing, it has obvious influence on steam sweep and steam channeling. Further study on steam channeling and reservoir quality, huff and puff cycle. From the angle of controlling steam channeling in reservoir quality, the classification and identification of potential steam channeling channel types, and the location of steam channeling channel in wellbore are described. Combined with dynamic and static data and comprehensive analysis of operating parameters, the quantitative standard of steam injection intensity and steam channeling is obtained, which provides a basis for preventing steam channeling in area 98 and similar reservoirs and improving oil recovery.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.7;P618.13

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