Small acoustic sources for low-cost reservoir monitoring offshore

Two 4D seismic data sets are compared which were acquired simultaneously in a deepwater field but with differently sized acoustic sources with 2450 in3 and 360 in3 volumes. The data sets were processed using similar runstreams, enabling side-by-side comparison of the 4D features. Compared with the l...

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Bibliographic Details
Published in:	Leading edge (Tulsa, Okla.) Vol. 35; no. 10; pp. 860 - 866
Main Authors:	Chalenski, David A, Wang, Kanglin, Lopez, Jorge, Hatchell, Paul, Wills, Peter, Chen, Yi, Griswold, Shari, Patrikeeva, Natalya
Format:	Journal Article
Language:	English
Published:	Society of Exploration Geophysicists 01-10-2016
Subjects:	applied (geophysical surveys & methods) Economic geology energy sources four-dimensional models geophysical methods Geophysics marine methods monitoring offshore petroleum reservoir rocks seismic methods seismic sources
Online Access:	Get full text
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Summary:	Two 4D seismic data sets are compared which were acquired simultaneously in a deepwater field but with differently sized acoustic sources with 2450 in3 and 360 in3 volumes. The data sets were processed using similar runstreams, enabling side-by-side comparison of the 4D features. Compared with the large-source data, the small-source data showed similar 4D signals, albeit with higher but acceptable levels of 4D noise. An overprint of the acquisition methodology was found to detrimentally impact the small-source data, but this was mitigated in processing. Opportunities for improvement of the small-source data in future dedicated surveys are proposed. A cost-benefit analysis is presented to show the relative value increase by using smaller, lower-cost surveys for frequent reservoir monitoring.
ISSN:	1070-485X 1938-3789
DOI:	10.1190/tle35100860.1