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Marine controlled-source electromagnetic methods in the hydrocarbon industry; a tutorial on method and practice

Lucy MacGregor and James Tomlinson
Marine controlled-source electromagnetic methods in the hydrocarbon industry; a tutorial on method and practice (in Interpretation and integration of CSEM data, Anonymous)
Interpretation (Tulsa) (August 2014) 2 (3): SH13-SH32

Abstract

We provide a tutorial on the marine controlled-source electromagnetic (CSEM) method aimed at geoscientists and explorationists who are new to EM methods. This tutorial highlights some of the issues to be considered in planning and executing a CSEM survey, and interpreting the results. CSEM methods can add valuable information on the resistivity structure of the subsurface, which complements measurements obtained from seismic or other geophysical methods. We also discuss the development of the method and provide an overview of the CSEM acquisition approaches applied today. Understanding the sensitivity of the CSEM method to seafloor resistivity structures is key to ensuring a successful survey. We illustrate this with simple examples, demonstrating the effect of reservoir and overburden properties and the effect of electrical anisotropy. It is also important to understand how well a given resistivity structure can be recovered from realistic survey data. We apply an inversion approach to illustrate this for 2D resistivity structures. Finally, we discuss the importance of interpreting CSEM in an integrated framework alongside seismic and well log data.


ISSN: 2324-8858
EISSN: 2324-8866
Serial Title: Interpretation (Tulsa)
Serial Volume: 2
Serial Issue: 3
Title: Marine controlled-source electromagnetic methods in the hydrocarbon industry; a tutorial on method and practice
Title: Interpretation and integration of CSEM data
Author(s): MacGregor, LucyTomlinson, James
Author(s): Anonymous
Affiliation: Rock Solid Images, Houston, TX, United States
Pages: SH13-SH32
Published: 201408
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 76
Accession Number: 2015-007008
Categories: Economic geology, geology of energy sourcesApplied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects.
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States
Update Code: 201504
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