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Chapter from: SG
42: Applications of 3-D Seismic Data to Exploration and Production
Edited by:
Paul Weimer and Thomas L. David Authors:
Stephen C. Jumper and Howel W. Pardue
Published 1996 as
part of Studies in Geology 42
Copyright © 1996 The American Association of Petroleum
Geologists. All Rights Reserved.
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*Editorial Note: Page numbers in this digital version
(HTML and PDF) do not correspond to those of the hardcopy.
Otherwise, the two are the same.
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| Jumper,
S. C., and H. W. Pardue, A 3-D case history in the Horseshoe Atoll area
of Scurry County, Texas, in P. Weimer and T. L. Davis, eds., AAPG
Studies in Geology No. 42 and SEG Geophysical Developments Series
No. 5, AAPG/SEG, Tulsa, p. 155-160.
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CHAPTER
16
Chapter 16: A 3-D
Case History in the Horseshoe Atoll Area of Scurry County, Texas Stephen C. Jumper and Howell W. Pardue*
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ABSTRACT
This case history presents
design considerations, processing techniques, and drilling results from
a 3-D seismic survey acquired in the pinnacle reef trend of Scurry County,
Texas. Pennsylvanian age reefs in this area have long been lucrative but
elusive exploration objectives. Their small areal extent and random location
pattern have often frustrated explorationists interpreting conventional
2-D seismic data. Through the example shown here, it becomes apparent that
pinnacle reef objectives can be located with much-improved confidence using
the 3-D seismic method.
The survey has approximately
9 mi2 (23 km2) of surface coverage, more than adequate
for a proper migration aperture at the objective horizon. The reefs in
question are reasonably identified with a 3-D grid consisting of 110 X
110-ft (33 X 33-m) bin spacing. Economic considerations and accessibility
constraints greatly affect the design of the survey. Processing techniques
include 3-D surface-consistent statics, post-stack FX (spacial deconvolution)
filtering to reduce random noise, and 3-D migration.
Interpretation of the migrated
3-D volume identified several possible drilling locations. Time slice presentations
at the pinnacle reef level clearly identified three subsequent producing
locations and helped reconcile two previous nonproductive wells. Geophysical
and economic success in this survey show that the 3-D seismic technique
can solve several of the problems previously encountered using conventional
2-D seismic data. |
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