[PDF] A Handbook For Seismic Data Acquisition In Exploration eBook
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This illustration-rich book explains seismic data acquisition operations from a fundamental and practical standpoint, ranging from land to marine 2D methods to 3D seismic methods. Helpful to geologists, field crews, exploration managers, petroleum engineers, and geophysicists, each chapter concludes with exercises on field data recording problems.
This illustration-rich paperback book explains a broad spectrum of seismic data acquisition operations from a fundamental and practical standpoint, ranging from land to marine 2D methods to 3D seismic methods. The book explains why we use the seismic method in exploration and is written in a manner palatable to geologists, field crews, exploration managers, petroleum engineers, and geophysicists. The book is written by a senior lecturer at a university and is ideal for use as a text in education settings. It opens with a brief history of the origins of the seismic method. It explains how to understand what we see on shot records. It examines the problem of noise and how to improve seismic signals using geophone and hydrophone arrays. Other discussions cover land and marine receiver equipment, available energy sources, fundamental stacking methods as an approach to understanding operations of seismic instrumentation, basic geodetic systems, and the use of GPS systems. Each chapter concludes with exercises designed to emphasize problems of recording field data, including setting up survey parameters.
This illustration-rich paperback book explains a broad spectrum of seismic data acquisition operations from a fundamental and practical standpoint, ranging from land to marine 2D methods to 3D seismic methods. The book explains why we use the seismic method in exploration and is written in a manner palatable to geologists, field crews, exploration managers, petroleum engineers, and geophysicists. The book is written by a senior lecturer at a university and is ideal for use as a text in education settings. It opens with a brief history of the origins of the seismic method. It explains how to understand what we see on shot records. It examines the problem of noise and how to improve seismic signals using geophone and hydrophone arrays. Other discussions cover land and marine receiver equipment, available energy sources, fundamental stacking methods as an approach to understanding operations of seismic instrumentation, basic geodetic systems, and the use of GPS systems. Each chapter concludes with exercises designed to emphasize problems of recording field data, including setting up survey parameters.
Acquisition and Processing of Marine Seismic Data demonstrates the main principles, required equipment, and suitable selection of parameters in 2D/3D marine seismic data acquisition, as well as theoretical principles of 2D marine seismic data processing and their practical implications. Featuring detailed datasets and examples, the book helps to relate theoretical background to real seismic data. This reference also contains important QC analysis methods and results both for data acquisition and marine seismic data processing. Acquisition and Processing of Marine Seismic Data is a valuable tool for researchers and students in geophysics, marine seismics, and seismic data, as well as for oil and gas exploration. Contains simple step-by-step diagrams of the methodology used in the processing of seismic data to demonstrate the theory behind the applications Combines theory and practice, including extensive noise, QC, and velocity analyses, as well as examples for beginners in the seismic operations market Includes simple illustrations to provide to the audience an easy understanding of the theoretical background Contains enhanced field data examples and applications
This book describes the methods and attributes required for the compe tent quality control of the data acquisition of a seismic exploration crew operating on land. Although the book is concerned mainly with explo ration for oil and gas reservoirs, and all the topics that are discussed in it are centred on that target, the material is applicable to other areas of seismic exploration such as civil engineering and the search for other minerals. The book comprises the distillation of more than thirty years' experience in geophysical exploration in all its aspects and in many parts of the world. Seismic data acquisition quality supervision is one aspect of geophysical exploration which, although of great importance, has had, so far as the writer is aware, no textbook devoted to it. It is hoped that it will be of interest to anyone who is engaged, in whatever capacity, in geophysical exploration and will help them to attain their goal, which is illustrated in Fig. 1. 1. The term birddog is colloquial in the geophysical exploration industry. It is a convenient shorthand title to describe the person whose full title is, and who acts as, the data acquisition quality control supervisor on a field seismic exploration crew. The term is used also to describe the person who is the client's representative on the field crew. In practice the same person performs both functions on behalf of the client.
This book deals with the optimization technique of seismic data acquisition parameter. Each aspect of acquisition parameter has been discussed in detail. Chapter-one deals with the general technique of seismic data acquisition and common meaning of some of the terms being used in exploration seismic in on land and offshore areas, particularly about characteristics of source & receiver and acquisition techniques. Chapter-two deals with the optimization of Geometrical Parameters i.e. far-offset distance, near-offset distance, group interval, effective array length, foldage, line orientation and line length. Chapter-three deals with the optimization of Source Parameters. Basic goal of optimization is to have required resolution and signal to noise ratio in the acquired data. For explosive source, shot hole depth, charge size and lithology of the medium surrounding the charge are three parameters which decide the source signature. First of all records with different depths below the weathering layer with equal charge size is taken. Signal to noise ratio and peak frequency of the signal at the main zone of interest is computed. Amplitude spectra of different traces at main zone of interest are also compared for all the records. Record giving highest peak frequency and signal to noise ratio corresponds to optimum depth. Now keeping this depth fixed, charge size is varied and record are taken. Again signal to noise ratio, peak frequency and amplitude spectra are compared and a suitable one is selected on the basis of frequency content and signal to noise ratio. In the case of land airgun, Number of airgun, number of pops and air gun patterns are the main parameters, which decide signal to noise ratio. In the case of Vibroseis, sweep length, end frequencies of the sweep and Vibroseis pattern are the main parameters to be optimized in the field. In marine work marine air gun is the widely used marine seismic source. Peak to peak amplitude, primary to bubble ratio (PBR) and bandwidth of the amplitude spectrum are the deciding parameters for selection of source.Chapter-four deals with the Source/Receiver Array Parameters. Effective array length, element's weighting and spacing are the parameters to be optimized on the basis of desired seismic resolution as well as degree of attenuation of coherent noise. Effectiveness of the array is examined by fold-back experiment and f-k diagram.Chapter-five deals with the Recording System & Quality Control. Silent features have been discussed here, which are essential to be adhered in the field so that objective of the survey is achieved.
Seismic Data Analysis Techniques in Hydrocarbon Exploration explains the fundamental concepts and skills used to acquire seismic data in the oil industry and the step-by-step techniques necessary to extract the sections that trap hydrocarbons as well as seismic data interpretation skills. It enhances the ability to interpret seismic data and use that data for basin evaluation, structural modeling of a fault, reservoir characterization, rock physics analysis, field development, and production studies. Understanding and interpreting seismic data is critical to oil and gas exploration companies. Arming young geoscientists with a reference that covers the key principles of seismic data analysis will enhance their job knowledge, skills and performance. A fundamental grasp of seismic data enhances employability and aids scientists in functioning effectively when working with seismic data in industry. Edited by a team of petroleum geoscientists with more than 30 years of experience in hydrocarbon exploration and data analysis at O&G companies. More than 200 figures, photographs, and illustrations aid in the understanding of the fundamental concepts and techniques used to acquire seismic data Takes an easy-to-follow, step-by-step approach to presenting the techniques and skills used to extract the geologic sections from acquired seismic data. Enhances the geoscientist’s effectiveness when using seismic data for field development and other exploration and production studies
Details the properties of 3D acquisition geometries and shows how they naturally lead to the 3D symmetric sampling approach to 3D survey design. Many examples are used to illustrate choices of acquisition parameters, and the link between survey parameters and noise suppression as well as imaging is an intrinsic part of the contents.