American Oil and Gas Reporter - October 2016 - 62

Everything

Everything for Oilwell Cementing

but the Cement!
OMEGA PLUG
(Ball-Type)

RUBBER
CEMENTING
PLUGS

Our cementing plugs are engineered
for reliability. Five wiping surfaces
provide a firm wiping action all the way to bottom. The top plug has a
solid non-metalic core. It is completely encased in rubber to prevent
pumpout and insure separation of slurry and drilling fluid at the bottom
of the casing. The core of the bottom plug is an aluminum alloy
cylinder with a diaphragm designed to allow the plug to be pumped
ahead of the cement slurry and rupture at touchdown on the float
equipment. Plugs are available in sizes: 2 3⁄8" through 13 3⁄8".
Top Plug Bottom Plug

CEMENTING
PLUGS
FOR LARGE
DIAMETER CASING
The plugs were originally designed for the large diameter casing used on
our Gulf Coast and have been in use for over 20 years. The assembly
consists of three heavy rubber cups separated by two aluminum alloy
bodies, three aluminum alloy discs. The plugs are assembled with
aluminum alloy bolts. The design provides six wiping surfaces. The
strength of these plugs permits use of conventional cementing methods
in deep holes. The bottom plugs have a diaphragm designed to allow the
plug to be pumped ahead of the cement slurry and rupture at touchdown
on the float equipment.

Top and bottom plugs are available in sizes: 16", 18 5⁄8", and 20"
All Cementing Plugs are PDC drillable.

EVERYTHING FOR OILWELL CEMENTING.

Plugs, casing centralizers, baskets, float equipment, stage cementing tools,

EVERYTHING BUT THE CEMENT!

CALL TOLL-FREE 800-457-4851 FOR PRICE AND DELIVERY
* P.O. Box 890068
Oklahoma City, OK 73189
* Phone: 800-457-4851
* Fax: 405-703-7049
* www.iri-oiltool.com
We accept VISA & MasterCard

PRIVATELY OWNED -ESTABLISHED IN 1965
62 THE AMERICAN OIL & GAS REPORTER

Improved Trap Definition, Fault Seal
Figure 3 illustrates the multidisciplinary
approach adopted to build the simulation
model to address each of the key
challenges involved in field development.
Some of the key aspects of the work can
be summarized as building the container
(delineating trap and fault sealing), filling
the container (resolving stratigraphic
complexities), and filling the reservoir
(reducing uncertainties related to
compartmentalization and fluid contact).
As the flanks of Stampede Field's
four-way turtle structural trap subsided
in response to salt withdrawal, crestal
faults were created as a result of structural
"flexuring." The faults were both short
and long, with some long enough to offset
the base of the salt. To accurately estimate
in-place resources and understand field
compartmentalization, the structure's
shape had to be interpreted accurately
and every possible fault had to be mapped
correctly. In turn, structure shape and
fault maps depend on acquiring a good
seismic image.
Seismic image quality in subsalt
environments generally is impacted
adversely by the overlying salt geometry.
In Stampede, while the center of the field
was well-imaged, the flanks generally
were not because of steep salt flanks,
faulted base salt, intrasalt inclusions, etc.
Previous seismic images, including WAZ
data, were not clear enough to reliably
map the flanks of the structure and identify
small offset faults. Because of the lowfrequency content (about 12 hertz) of the
seismic data, the presence of subseismic
faults could not be ruled out.
Both NAZ and WAZ seismic data
were used in the exploration and appraisal
phases, which involved limited subsurface
illumination. As a result, while the central
part of the trap was imaged relatively
well, the peripheral part of the traps-
especially in the north and northwest-
were imaged poorly.
Dual-coil 3-D seismic data licensed
during the field development phase showed
an overall imaging improvement. We
used dual-coil seismic and its derivative
attributes to map the structural flanks
American Oil and Gas Reporter - October 2016

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