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Book Chapter

Correlation Procedures

Published:
January 01, 2011

Abstract

This chapter describes the basic correlation procedures used in a typical interpretation project, beginning with how to start an interpretation and then discussing fundamentals of the two main correlation techniques (loop tying and jump correlation). The section on correlations in depth-migration projects provides helpful information and guidance for handling aspects of interpretation that are specific to working with depth-migrated data, especially for building velocity models. The discussion of visualization emphasizes the importance of this procedure for validating correlations and communicating interpretation results. The chapter closes with a summary of individual processes and an example of a generic interpretation workflow.

After checking to be sure that all data (seismic, well, cultural, potential field, etc.) for your project are in hand, take time to review the data before beginning correlations. You often make many important observations with a minimum of bias at this early stage of a project. Here are the steps you should follow:

You select horizons for interpretation and mapping early in a project; some horizons may be more geologically significant or more obvious than others, and in some projects there is neither time nor need for picking the entire set of common dip families that make up an individual seismic line or a whole data set. These choices, which often involve correlation with other control such as well information by way of well ties, are determined by the exploration objectives for the project, the geologic complexity of the study area, and the quality of the available seismic data. On occasion, you modify the number of horizons and faults that you interpret during a project as you learn more about the study area. Within the limits of project objectives and available time, there is no point picking horizons (boundaries) and faults that do not contribute meaningfully to building the geologic history of an area. Although there might be many interesting features and surfaces visible in your data, attempting to identify and track all of them can compromise the objectives of an interpretation, destroy interpretive focus, and waste time and resources.

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Contents

Society of Exploration Geophysicists Geophysical Monograph Series

First Steps in Seismic Interpretation

Donald A. Herron
Donald A. Herron
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Society of Exploration Geophysicists
Volume
16
ISBN electronic:
9781560802938
Publication date:
January 01, 2011

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