American Oil and Gas Reporter - October 2016 - 58

SpecialReport: Gulf of Mexico Update
Three key issues in developing the
Stampede Field are reservoir compartmentalization, stratigraphic complexity,
and fluid contact uncertainty. These issues
have been studied in detail by integrating
structural and stratigraphic interpretation,
and using state-of-the-art dual-coil 3-D
seismic data, fault-seal analysis, and
pressure and fluid data from wells, core
data and logs.
The products and knowledge from
this integration effort were incorporated
into a geological model that honors the
data and observations to capture all uncertainties and their ranges. The focus
of this effort included trap geometry, the
sealing capability of faults, the depositional environment, facies distribution,
geochemical fluid analysis, and oil/water
contact (OWC) estimates. The model
then was applied for flow simulation,
resulting in the 10-well "base case" development plan.
This multidisciplinary effort to optimize the Stampede Field's development
allowed the project co-owners to:
* Incorporate fault seal-related compartmentalization into the simulation
model;
* Properly represent facies types in
the geological model; and
* Better understand the compartments
and associated OWCs, and understand
their impact on flow simulation/field development.

FIGURE 1
Legacy Depth Structure Map of Gff40s Main Reservoir Zone

GC468

Pony #2

Pony #1

KH #1

KH #2

GC512

C.I - 200'

FIGURE 2
Dual-Coil 3-D Image of Stampede Field
(Gff10s, Gff40s and Sh20s Reservoir Zones)
E

W

5,000'

10,000'

SALT

Trap And Fill
The Stampede Field is a four-way
structural closure segmented by faults in
Green Canyon blocks 468, 511 and 512.
Figure 1 shows a legacy depth structure
map of the main reservoir (the middle
Miocene Gff40s) from wide-azimuth 3D seismic data. It also denotes the discovery and appraisal wells. Note the absence of faults in the western flank of
the structure.
The structure formed as a four-way
turtle in response to salt withdrawal from
the basin. The evacuated salt formed an
58 THE AMERICAN OIL & GAS REPORTER

15,000'

20,000'

20,000'

25,000'

Gff10
30,000'

30,000'
Gff40
Sh20
35,000'

40,000'

40,000'

45,000'
0.0 0.2 0.5 0.8 1.0

2.0 miles



Table of Contents for the Digital Edition of American Oil and Gas Reporter - October 2016

Contents
American Oil and Gas Reporter - October 2016 - Cover1
American Oil and Gas Reporter - October 2016 - Cover2
American Oil and Gas Reporter - October 2016 - Contents
American Oil and Gas Reporter - October 2016 - 4
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American Oil and Gas Reporter - October 2016 - Cover3
American Oil and Gas Reporter - October 2016 - Cover4
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