塔中Ⅱ区奥陶系鹰山组储层地震地质解译

发布时间：2018-03-21 22:04

本文选题：碳酸盐岩储层　切入点：地震反射　出处：《西南石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：目前,对于碳酸岩盐油气储层的勘探来说,地震勘探方法仍是最有效的勘探手段之一,但由于在碳酸岩盐地震勘探中,碳酸岩盐地层内部分层较为模糊,常缺少可追踪的地震波反射同相轴,使得勘探难度大大增加。因此,通过研究地震反射同相轴变化特征及来自不同储集空间的地震反射、散射等波场特征,从而去认识和描述地下缝洞系统的形态和空间分布就具有很大意义。在对研究区域地质背景研究基础之上,综合地震反射形态差异及反射能量强弱,可将塔中II区奥陶系鹰山组储层对应的地震反射划分为“串珠状”反射、“片状”反射、“杂乱”反射及弱反射4种类型,并对其中的“串珠状”反射和“片状”反射进行细分。通过研究每一种反射类型与不同储层发育特征的对应关系,从而对四种反射类型所对应的储层进行差异性分析,并在此基础之上建立不同地震反射类型的地质解译,总结出了“串珠状”反射所对应储层发育最好,有效储层相对最为发育,“片状”反射所对应储层发育情况仅次于“串珠状”反射,而“杂乱”反射及弱反射储层发育较差,其中弱反射储层基本不发育。通过对不同地震反射类型的系统研究,建立单井一维地质模型,研究单井及井周储层发育情况,并以此为基础,结合区域构造断裂、岩溶古地貌等因素,建立千米级二维地质模型,研究在一定方向上储层发育分布情况,并通过建立三维静态地质模型研究部分区域储层特征。最后结合之前研究工作对塔中II区奥陶系鹰山组储层分布做出预测,使得研究“串珠状”、“片状”、“杂乱”反射的形成机理及地质内涵有了特别的意义。
[Abstract]:At present, seismic exploration method is still one of the most effective methods for carbonate oil and gas reservoir exploration, but in carbonate seismic exploration, the inner stratification of carbonate rock salt formation is relatively fuzzy. There is often a lack of traceable seismic reflection cophase axis, which makes exploration much more difficult. Therefore, by studying the variation characteristics of seismic reflection cophase axis and seismic reflection and scattering from different reservoir spaces, the characteristics of seismic reflection, scattering and other wave fields are studied. It is of great significance to understand and describe the shape and spatial distribution of underground fracture-hole system. Based on the study of the regional geological background, the difference of seismic reflection morphology and the intensity of reflection energy are discussed. Seismic reflection corresponding to Ordovician Yingshan formation reservoir in Tazhong II area can be divided into four types: "bead" reflection, "flake" reflection, "clutter" reflection and weak reflection. The "bead" reflection and "flake" reflection are subdivided. By studying the corresponding relationship between each reflection type and different reservoir development characteristics, the reservoir corresponding to the four types of reflection is analyzed differently. On this basis, the geological interpretation of different seismic reflection types is established, and it is concluded that the reservoir corresponding to the "beaded" reflection has the best development. The effective reservoir is relatively the most developed, and the development of the "flake" reflection is second only to the "beaded" reflection, while the "clutter" reflection and weak reflection reservoir are poor, among which the weak reflection reservoir is basically not developed. Through the systematic study of different seismic reflection types, the one-dimensional geological model of single well is established, and the development of single-well and peri-well reservoirs is studied. Based on this, combined with regional structural faults, karst paleogeomorphology and other factors, To establish a two dimensional geological model of the kilometer scale and study the reservoir development and distribution in a certain direction, Finally, the reservoir distribution of Ordovician Yingshan formation in Tazhong II area is predicted in combination with previous research work. It is of special significance to study the formation mechanism and geological connotation of "bead", "flake" and "clutter" reflection.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;P631.4

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