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The AAPG/Datapages Combined Publications Database
AAPG Bulletin
Abstract
(Begin page 433)
AAPG Bulletin, V.
Sequence
stratigraphic responses to shoreline-perpendicular growth
faulting in shallow marine reservoirs of the Champion field, offshore Brunei Darussalam,
South China Sea
Sequence stratigraphic responses to shoreline-perpendicular growth
faulting in shallow marine reservoirs of the Champion field, offshore Brunei Darussalam,
South China SeaD. Hodgetts,1 J. Imber,2 C. Childs,3 S. Flint,4 J. Howell,5 J. Kavanagh,6 P. Nell,7 J. Walsh8
1STRAT Group, Department of Earth Sciences, University of
Liverpool, 4 Brownlow Street, Liverpool L69 4GP, United Kingdom; email: [email protected]
2Fault Analysis Group, Department of Earth Sciences, University of Liverpool, 4
Brownlow Street, Liverpool L69 4GP, United Kingdom. Current address: Department of
Geology, University College Dublin, Belfield, Dublin 4, Ireland
3Fault Analysis Group, Department of Earth Sciences, University of Liverpool, 4
Brownlow Street, Liverpool L69 4GP, United Kingdom. Current address: Department of
Geology, University College Dublin, Belfield, Dublin 4, Ireland
4STRAT Group, Department of Earth Sciences, University of Liverpool, 4 Brownlow
Street, Liverpool L69 4GP, United Kingdom
5STRAT Group, Department of Earth Sciences, University of Liverpool, 4 Brownlow
Street, Liverpool L69 4GP, United Kingdom
6STRAT Group, Department of Earth Sciences, University of Liverpool, 4 Brownlow
Street, Liverpool L69 4GP, United Kingdom
7Fault Analysis Group, Department of Earth Sciences, University of Liverpool, 4
Brownlow Street, Liverpool L69 4GP, United Kingdom. Current address: Badley Technology
Ltd., North Beck House, Hundleby, Spilsby, PE23 5NB, United Kingdom
8Fault Analysis Group, Department of Earth Sciences, University of Liverpool, 4
Brownlow Street, Liverpool L69 4GP, United Kingdom. Current address: Department of
Geology, University College Dublin, Belfield, Dublin 4, Ireland
AUTHORS
David Hodgetts received his B.Sc. (hons) degree in geology from
Durham University in 1991 and an M.Sc. degree (1992) in computing in earth sciences and
Ph.D. (1995) in three-dimensional (3-D) numerical modeling of continental lithosphere
deformation from Keele University. After a one year postdoctoral fellowship at Keele
working on 3-D structural restoration algorithms, he moved to the Stratigraphy Research
Group at the University of Liverpool. Since then he has been working on the
tectono-stratigraphy of the Champion field, offshore Brunei Darussalam, South China Sea.
His other research interests include development of software to aid the building of
reservoir models, synthetic seismic modeling from outcrop data, and numerical modeling of
sedimentary depositional systems.
Jonathan Imber, a B.Sc. degree graduate of Durham University,
joined the Fault Analysis Group in 1998 after completing a Ph.D. on fault/shear zone
kinematics at Durham. A research fellow with the Fault Analysis Group at University
College Dublin, his research mainly concerns analysis of the kinematics of faults from 3-D
seismic data and numerical modeling of fault growth using discrete element modeling
methods.
Conrad Childs is a senior research fellow within the Fault
Analysis Group of University College Dublin, formerly of University of Liverpool. Having
earned an M.Sc. degree in structural geology from Imperial College London in 1987, he
joined the Fault Analysis Group at University of Liverpool, taking up a senior research
role and completing a Ph.D. on the structure and hydraulic properties of fault zones. His
research concerns many aspects of faults, including their impact on fluid flow.
Stephen Flint holds a personal chair in stratigraphy and petroleum geology at the University of Liverpool, United Kingdom. After earning a Ph.D. from Leeds University in 1985 he joined Shell Research, Rijswijk, Netherlands, where he was involved in development of 3-D reservoir geological modeling technology with related outcrop studies and application to fields worldwide. In 1989 he moved to Liverpool University, where he built up and directs the Stratigraphy Research Group (STRAT Group). This industry-supported team of postdoctoral researchers and Ph.D. students is working on stratigraphic prediction in nonmarine, shallow, and deep marine reservoirs and analog outcrops worldwide. New developments in the group include 3-D reservoir modeling and sediment transport modeling.
John Howell gained a B.Sc. (hons) degree from Cardiff (1988) and
a Ph.D. from the University of Birmingham (1992). He then moved to Liverpool, where he
completed postdoctoral studies on sequence stratigraphy of the Upper Jurassic reservoirs
in the North Sea and the Book Cliffs of Utah. In 1995 he took a faculty position in
Liverpool as part of the Stratigraphy Research Group. He works on sequence stratigraphy in
aeolian, coastal plain, and shallow marine systems in Utah, Namibia, Chile, Argentina, and
other exotic places and has just completed a three-month reservoir modeling sabbatical at
Saga Petroleum.
John Kavanagh graduated from the University of Glasgow in 1992.
After working for Bullen Consultants as a graduate geologist and site quality assurance
engineer, he then went on to join the Earth Science Department of the University of
Liverpool as a laboratory technician. He currently works with the STRAT Group as a
research technician where his main work involves seismic and well correlation, as well as
field data acquisition.
Philip Nell, a B.Sc. degree graduate from Nottingham University,
completed a structural geology Ph.D. on the Scottish Dalradian from the University of
Manchester in 1984. He held postdoctoral structural geology positions at the University of
Leeds, British Antarctic Survey, and University of Manchester prior to joining the Fault
Analysis Group at Liverpool in 1995. His recent research has been on fault geometry and
the development of new software techniques for seismic interpretation and reservoir
modeling. He joined Badley Technology Ltd. as a structural geologist in 2000 to continue
these developments.
John Walsh is on the teaching staff of the Department of Geology
at University College Dublin. He gained a B.Sc. degree from University College Dublin in
1980 and a Ph.D. from University College Galway in 1986, prior to becoming a founding
member of the Fault Analysis Group at the University of Liverpool. He has been director of
the research group since 1996, both within Liverpool and following its relocation to
Dublin. This externally funded research group comprises ten mainly postdoctoral
researchers, together with additional postgraduates, and carries out basic research on all
aspects of faults and other types of fracture and applies the results to practical
problems, principally in the field of hydrocarbon reservoir characterization and modeling.
ACKNOWLEDGMENTS
This article resulted from a collaborative research project between the
Stratigraphy Group and the Fault Analysis Group at Liverpool University. We thank Brunei
Shell Petroleum Co. Snd. Bhd. for financial and technical support of the project, in
particular Rick Carter, Han Van Gils, William Walton, Robert Maskall, Claudio Barrio, and
Jim Chapman. The final manuscript benefited from the useful comments of reviewers Fred
Wehr, G. H. Blake, and AAPG editors Jory Pacht and Neil Hurley. This article is
published with the permission of Brunei Shell Petroleum Co. Snd. Bhd. and the Petroleum
Unit of the Government of Brunei Darussalam.
ABSTRACT
The Champion field, offshore Brunei Darussalam, comprises a thick
middle-upper Miocene succession of shallow marine sediments associated with major growth
fault systems and deposited as part of the paleo-Baram delta. The structural evolution of
the Champion field has resulted in an unusual situation where growth faults strike
perpendicular to the paleoshoreline orientation. Shoreface parasequences and
tidal-estuarine complexes are mapped directly from three-dimensional (3-D) seismic data
calibrated from wells. The seismic interpretations provide chronostratigraphic
correlations that are more robust than some well-based markers because the seismic
interpretations have better spatial coverage. Depositional responses to growth faulting
are defined by two end-member models, (1) layer thickening and (2) addition of layers in
the hanging wall. Layer addition makes correlation across faults problematical. Growth may
be accommodated by either or a combination of these processes, and areas of layer addition
are related to transgressive events in the hanging wall. Topographic changes thought to be
associated with fault movements may fundamentally change shoreline type, sand body
orientations, and petrophysical properties for discrete periods of time. These
stratigraphic complexities are linked spatiotemporally to accommodation history but cannot
be adequately predicted from well data alone.
(Begin page 434)
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