A Guide Book: Sub-Surface Data Management for Data Managers (Oil & Gas Sector) Volume -1 Seismic

By Xlibris US

As the oil and gas (O&G) industry grows by leaps and bounds, so do data; kb (kilobyte) -> Yb (Yottabyte).

This book is specifically written for O&G Data Management personnel and Earth Sciences majoring students who will juggle and grapple with seismic data on a routine basis during the course of their career or study.

The step by step methodology, though seems orthodox, has been revisited so as to ensure no unnecessary repetition of work.

The book will pave the way for O&G Data Management personnel to have a firm grip in handling seismic data entrusted to them, and to deal with the data in a professional way with no "cutting corners".

It must be noted that when dealing with seismic data management, the word "novice" is not in the work vocabulary.

Throughout this book, O&G Data Management personnel get to understand the basics of the seismic data and their management, and acquire additional skill that can be applied to any sub-surface data management with minimal changes to the workflow

Yottabyte The biggest storage capacity defined by Julian Bunn ET el in the GIOD project

• Language: English
• Publisher: Xlibris US
• Release date: Aug 21, 2014
• ISBN: 9781499044027

Book preview

A GUIDE BOOK:

SUB-SURFACE DATA MANAGEMENT FOR DATA MANAGERS

(OIL & GAS SECTOR)

VOLUME -1 SEISMIC

AHMAD MAIDINSAR

Copyright © 2014 by Ahmad Maidinsar. 609142

Library of Congress Control Number: 2014911820

ISBN: Softcover       978-1-4990-4401-0

ISBN: Hardcover      978-1-4990-4400-3

ISBN: EBook              978-1-4990-4402-7

All rights reserved. No part of this book may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without permission in writing from the copyright owner.

Rev. date: 09/25/2014

Xlibris LLC

1-888-795-4274

www.Xlibris.com

Ahmad Bin Maidinsar

Foreword

This book is about handling geological and geophysical data from a broad spectrum of media and formats. It is particularly oriented to IT specialists that often interact with geoscientists to generate the necessary computer projects on different working environments and platforms.

The author starts by presenting the historical background on subsurface data management and also some basic insights or definition of commonly occurring geotechnical terms (e.g., seismic acquisition, principles of wave propagation, and methods of subsurface imaging). Data can come in different forms, media, and formats; so it is up to our dedicated IT supports and subsurface data managers to make these available and usable for the end user (seismic interpreter, geologist, decision makers), depending on the company´s purpose or requirements. Before any important decision is made to acquire new or more sophisticated data, we need to rely a lot on preexisting data that could be presented to us in old or unusual media type, which include paper, sepia, microfilm, tapes, to mention just a few. The reliance on preexisting data can help to make more assertive decisions on which additional data type to acquire, optimize technical specifications, perhaps to handle new objectives, plot survey designs, or even give a first impression of the potential of certain areas for stakeholders.

With ever-increasing CPU processing capabilities and with the introduction of 64-bit computer platforms, it means that larger data size can be easily handled; this puts strains on storage capabilities, and thus, new means of storing information are required. For the same geophysical volume, different data formats (8 bit vs. 32 bit) will occupy significantly different storage spaces; at the same time, that will reveal the same study subject with different depths of details.

It also demonstrates that the responsibility of data managers and IT supports goes beyond data loading and storage. Most importantly, it addresses important practices of data verification, validity, corrections for misties, projection systems, polarity, etc., in a process called data cleaning or harmonization.

To conclude, this guidebook is loaded with a wealth of useful tips for subsurface data management for IT people who support essentially the oil and gas business.

Vladimir Machado

PhD in Geosciences

Specialist Geologist—Exploration, SONANGOL P&P

Table of Contents

List of Figures

Figure 1-1: Seismic section and a trace after undergoing processing

Figure 2-1: Schematic of the reflected wave

Figure 2-2: Schematic of the refracted wave

Figure 2-3: Schematic of the surface wave

Figure 2-4: A sinusoidal wave denoting (1) amplitude (2) frequency (3) wavelength

Figure 2-5: Example of frequencies

Figure 2-6: Paper seismic section

Figure 2-7: Seismic section on film—an example

Figure 2-8: Seismic section on sepia—an example

Figure 2-9: Microficheand reader

Figure 2-10: Types of microfilm reel and reader

Figure 2-11: Floppy disk—8, 5¼, and 3½"

Figure 2-12: Half-inch 9-track