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所在平台: Udemy |
课程主页: https://www.udemy.com/course/seismic-processing-velocities-pstm-psdm/
课程评论：没有评论
课程名称：地震处理速度 - 地球物理学 课程概述： 本课程深入探讨地震速度，特别关注其在地震处理和三维地震勘探中的应用。每节课都配有精心设计的图形，以清晰地解释相关概念。课程共分为九个独立的演示部分，旨在让学习者深刻理解正确地震速度的重要性，以及错误的速度处理可能对解释工作造成的严重损害。同时，课程也将展示如何利用正确的速度和处理流程，更好地成像地下构造，并识别水平层理和垂直裂缝。 课程内容细分： * **第一、二部分：** 标准NMO速度和多次波的介绍。学习如何拾取速度，以及如何避免多次波的干扰。 * **第三至五部分：** 详细阐述时徙构造速度与深度徙构速度之间的基本差异。解释为何在存在侧向速度变化的地带需要进行深度徙构。分析徙构叠加道集受到的影响，以及速度下沉（sags）和速度抬升（pull-ups）概念。学习如何构建传统的盐下速度模型。 * **第六、七部分：** 介绍层析（Tomography）和全波形反演（Full Waveform Inversion）。讲解它们在深度徙构中的应用，以优化DPSDM速度场。通过简单的图形解释层析和全波形反演对叠加道集前后的影响。 * **第八、九部分：** 探讨各向异性（Anisotropy），包括VTI和HTI。说明各向异性如何帮助发现水平岩石层理和垂直裂缝，以及它在地震数据中的表现形式。 * **奖励部分 - 第十部分：** 如何合并多个地震数据体。 * **额外奖励：** 课程将对一个真实的二维陆地地震项目进行讲解。学习者将了解该项目的地质背景，地震采集和设备，地震处理的关键步骤，以及最终徙构图像。通过这个项目，将深入理解为何大部分区域的成像效果出色，而一小部分区域成像质量欠佳。该项目位于美国南达科他州，一个地震活动稀疏的地区。
This course is about seismic velocities, especially as related to seismic processing and 3D seismic exploration. Each presentation contains hand-created graphics, illustrated to explain the concepts. The presentations are separated into 9 individual presentations. The users will better understand the importance of proper seismic velocities and how doing it wrong can severely harm your interpretation. But how using the right velocities, in the right procedures, can greatly help image the subsurface as well as find horizontal layering and vertical fractures.Parts 1 & 2: Introduction to standard NMO velocities and multiples. How are velocities picked and how to avoid multiples.Parts 3-5: Fundamental differences between time migration velocities and depth migration velocities. Why depth migration is required for areas with lateral velocity variations. How migrated gathers are affected. What are velocity sags and pull-ups? How to build a traditional sub-salt velocity model.Parts 6 & 7: Tomography and Full Waveform Inversion. How they are used in depth migration to improve psdm velocity fields. How are gathers affected before and after tomo and fwi? Simple graphics explain each concept.Parts 8 & 9: Anisotropy. VTI, HTI. Anisotropy can be used to help find horizontal rock layering and vertical fracturing. How does anisotropy look on seismic data?Bonus - Part 10: merging multiple volumesAdditional Bonus! I narrate a real 2D land seismic project. You will see the geological motivation behind the project, the seismic acquisition and equipment, the key steps in the seismic processing and images of the final migration. You will understand why most areas of the results are terrific while a small portion is poorly imaged. The project is located in an area of sparse seismic activity - South Dakota in USA.
