Airborne - EM Hydrocarbon mapping in Mozambique

Andreas Pfaffling; Ståle Monstad; Ross W. Groom; Jonathan Rudd

doi:10.1071/ASEG2009ab040

ISSN: 2202-0586
E-ISSN:

oa Airborne - EM Hydrocarbon mapping in Mozambique
Authors Andreas Pfaffling^a, Ståle Monstad^b, Ross W. Groom^c and Jonathan Rudd^d
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^a NGI, , [email protected] ^b DNO, , [email protected] ^c Petroseikon lnc., , [email protected] ^d Aeroquest Ltd., , [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2009, Issue ASEG2009 - 20th Geophysical Conference, Dec 2009, p. 1 - 6
DOI: https://doi.org/10.1071/ASEG2009ab040
- Published online: 01 Dec 2009

Abstract

Summary

We lay out a case history of a multi-method airborne geophysical survey to assist a hydrocarbon exploration project in central Mozambique. The dedicated targets of the survey are near surface resistivity anomalies caused by hydrocarbon seepage plumes. The geophysical survey concept includes the use of time-domain electromagnetics, magnetometry and gamma-spectrometry applied from rotary and fixed wing aircraft. Preliminary data interpretation, closely tied to 2D seismic information and the regional geological understanding, indicates a successful delineation of a seepage alteration zone just one month after survey completion.

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2009-12-01

2026-01-15

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References

Hughes, L., 1983, Case Histories of an Electromagnetic Method for Petroleum Exploration: Proprietary data sale, Zonge Engineering & Research Organization, available for download at www.zonge.com
Saunders, D.F., Branch, J.F., and Thompson, C.K., 1994, Tests of Australian aerial radiometric data for use in petroleum reconnaissance: Geophysics, 59 (3) 411-419.
Smith, R.S. and Rowe, J.D., 1997, A new regional exploration method for detecting hydrocarbon alteration plumes: the ALTREX™ method: Expl. Geophys., 28, 286-291.
Sternberg, B., 1991, A review of some experience with the induced-polarization/resistivity method for hydrocarbon surveys: Successes and limitations: Geophysics, 56, 1522-1532.

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Article Type: Research Article

Keyword(s): Airborne EM; case history; hydrocarbons; magnetics; near-surface; spectrometry

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