Some of our
Clients and Project Study Areas
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IRT has broad experience both with Domestic US
and International projects.
IRT also has a broad range of experience with both clastic and carbonate reservoirs.
Domestic
Alaska - Since 1989, International
Reservoir Technologies, Inc. (IRT) has been developing and updating full field models
including the largest oil reservoir in North America, Prudhoe Bay. Past and present
projects have ranged from providing manpower to complete studies, with IRT personnel
working between IRT's Lakewood office (located west of Denver) and the client's
offices. The models we have built range from high resolution type-pattern /
mechanistic models to full field models, conventional black oil to fully compositional,
including anywhere between 10 and 3000 wells and matching almost 30 years of producing
history to parametric studies for exploration plays. |
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Prudhoe Bay Field, Alaska; BP Exploration
Details 1990-2002
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Prudhoe Bay is one of the largest fields in North America. International Reservoir
Technologies has been performing modeling studies of this reservoir since 1990 and
continues to perform compositional simulation studies including a new full field
model. All of the models have been built and maintained using the Landmark VIP
family of simulation software. The full field model is based on a deterministic
petrophysical reservoir description and the latest 3-D seismic interpretation of the
Field's structure. The model has 280,000 grid cells - over 100,000 of them active at any
time - and a sequence of lower porosity, lower net-to-gross, relatively shale-free sands,
in the middle, and much lower porosity, low net-to gross sands separated by mapable flood
plain shales at the bottom of the reservoir. The degree of vertical communication within
the reservoir at any point usually controls the performance of wells in that area;
successfully modeling the Ivishak reservoir is therefore highly dependent on correctly
representing the variations in vertical communication throughout the reservoir.
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The effects of water injection, dry gas cycling into the gas cap, miscible gas
displacement using a WAG procedure in patterns, well fracture treatments and gas
production levels have all been modeled using the VIP suite of software. International
Reservoir Technologies has also integrated existing reservoir description geo-statistical
models into "type pattern" sector models to study the miscible gas displacement
process using both compositional and Todd-Longstaff PVT formulations. These sector studies
included studies of the impact of vertical and areal gridding density and scale-up
techniques on the predicted miscible displacement recovery. Phase behavior of the fluids
has been studied, and equation of state parameters derived.
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Schrader Bluff Field, N. Slope Alaska,
BP Exploration Details 1995
This was an EOR/miscible gas feasibility study to evaluate miscibility conditions for
this North Slope Alaska reservoir. Swelling tests were modeled using a PVT simulator, and
compositional slimtube displacements were modeled with VIP simulation models.
International Reservoir Technologies also built and evaluated a pattern WAG process model.
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Milne Point Unit, N. Slope Alaska; BP Exploration
Details Contact Richard Dillon for additional
information 303 279-0877
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Niakuk Field, N. Slope Alaska; BP Exploration
Details Contact Richard Dillon for additional
information 303 279-0877
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Endicott Field, N. Slope Alaska; BP Exploration
Details 1995-1999
Endicott is a large oil reservoir just offshore on the North Slope of Alaska. IRT has
constructed and history matched a new full field model of the reservoir, and we are now
building a compositional and Todd-Longstaff version of the model. Sector models to
study a new miscible gas displacement project at Endicott will be imbedded into a coarse
grid version of this full field model. All of the models are based on a geo-statistical
based geocellular reservoir description of over 19 million cells. Geological modeling of
the reservoir in this valley-fill, tidally influenced fluvial-deltaic environment was
accomplished through facies and petrophysical modeling using geo-statistical techniques,
namely object modeling and sequential Gaussian simulation respectively. The geological
models were successfully up-scaled to the full field model gridding - coarse root grid
with multiple "fine" grids embedded in the oil intervals of each geologic zone -
using the Landmark/VIP gridgenr/array software suite. Again, reservoir performance and the
model's ability to accurately model that performance are controlled by the level of
vertical communication at each point in the reservoir.
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North Star, N. Slope Alaska; BP Exploration
Details 1995-1998
International Reservoir Technologies built a 59,000 grid cell, 11 component VIP model
of this volatile oil reservoir and has simulated several prediction scenarios to support
the facilities design team in determining project economics.
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PT Thompson Field, Alaska; BP Exploration
Details Contact Joe Dozzo for additional information
303 279-0877
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Liberty Field, Alaska; BP Exploration
Details Contact Joe Dozzo for additional information
303 279-0877
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Badami Field, Alaska; BP
Exploration Details 1995-1998
International Reservoir Technologies built a 202,000 grid cell model of this turbidite
reservoir based on detailed geophysical and geostatistical interpretations. The model was
used to evaluate recovery sensitivities to reservoir description variables as part of the
overall commerciality decision-making process.
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| Big Hand Minnelusa, Montana; Nance
Petroleum Details |
Brush Lake Field, Gunton Reservoir,
Montana; Nance Petroleum
Details 2002
International Reservoir Technologies was contracted by Nance Petroleum to build a
static model for the ordovician Gunton, a carbonate reservoir in Brush Lake Field,
Williston Basin, Montana. The model consisted of 6 layers and 19 wells. Work
included a review of the core, development of a depositional model, construction of an
OpenWorks database, update of the structural interpretation, log correlation, property
mapping, and fluid contact identification. Reservoir simulation using the static
model resulted in a substantial increase in estimated oil-in-place and numerous completion
and re-completion opportunities in this secondary reservoir.
Please contact Laura Elliott for additional information:
IRT_Information@irt-inc.com
or 303 279-0877
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Dolphin Field, North Dakota;
Consolidated Oil and Gas
Details 1987-1995
International Reservoir Technologies has been the principal reservoir engineering
consultant on the Dolphin Field through the discovery, development, gas cycling miscible
displacement and performance monitoring phases of the life of this implementation of this
volatile oil reservoir. The reservoir is a salt plugged carbonate with highly directional
permeability. Equation of state fluid property characterization was performed on extensive
laboratory tests in order to determine miscibility conditions and develop an accurate
compositional reservoir simulation model. Development and operational alternatives are
continuously evaluated including recompletions, infill drilling, water injection for sweep
control, and blowdown scenarios. Each alternative is evaluated within gathering system,
process plant, and compression constraints.
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Eland Lodgepole Unit,
Williston Basin, ND; Duncan Oil Co. Details
1994-2002
The Eland Lodgepole reservoir is geologically complex in terms of
porosity types and pore volume determination. A vuggy/fracture pore system results
in a high effective permeability, which provides good productivity. Extensive
geologic and engineering analysis have been performed in order to construct a
dual-porosity reservoir simulation model for use in field development and operations
management. The field is currently under waterflood and is expected to recover an
extraordinarily high proportion of the original oil in place.
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East Hawley Field, Oklahoma; General
Atlantic Resources
Details 1993
International Reservoir Technologies was contracted by General Atlantic Resources to
conduct a reservoir engineering study of the East Hawley Field, Misener Sand,
located in Grant County, Oklahoma. The objectives for the forty-one (41) well
project was to gain an understanding of the source of water and water cut behavior,
evaluate production practices to maximize recovery, evaluate East Hawley Field as a
water-flood candidate and recommend a water-flood pattern if a water-flood proved
appropriate. During the coarse of the study, log and core data were used to build a
geologic model of the field. The geologic model, combined with available pressure
data, hydraulic fracture treatment records and production data, were sufficient to meet
the objectives of the study.
Contact project coordinator for additional information:
Joe
Dozzo
JADozzo@irt-inc.com
or 303 279-0877
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SW Canyon City, Oklahoma; UMC Petr.
Corp. Details 1997-1998 (UMC
is now Ocean Energy Inc.)
 International Reservoir Technologies performed a reservoir simulation study on
this Lower Red Fork tight gas sand in Caddo and Canadian Counties, Oklahoma. The
goal of the study was to identify high pressure bypassed areas of the reservoir for
spotting potential infill locations.
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Dripping Rock Field, Wyoming; Celcius
Energy Company Details 1992
in January 1992, International Reservoir Technologies, Inc (IRT), had just completed an
initial reservoir study consisting of six (6) wells located in the Dripping Rock
Field, Sweetwater County, Wyoming. Subsequent to completion of the initial study,
additional wells were placed on production with plans to drill an additional number of
wells. IRT was contacted by Celcius Energy Company to update the initial
reservoir study to characterize the reservoir and predict recoverable gas reserves for the
existing wells. Several prediction cases were run to evaluate the impact of
additional development drilling.
Contact project coordinator for additional information:
Joe
Dozzo
JADozzo@irt-inc.com
or 303 279-0877
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| Henry Unit, Sweetwater Co.,
Wyoming: Washington Energy Details
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| Royal Draw, Wyoming; Duncan Energy
Details |
Sun Ranch Field, Wyoming; UMC
Petroleum Details 1993-1994
International Reservoir Technologies performed a compositional modeling study of gas
cycling expansion in this volatile oil reservoir. The interpretations of both reservoir
sandstone distribution and structure were input into the simulation model. The model was
then history matched and used to develop a reservoir injection and production scheme that
accounted for the effects of offsetting production. IRT presented the results to the
Wyoming Oil & Gas Conservation Commission for project sanctioning
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International
Africa
Algeria - Since 1992 IRT has been
providing general engineering and earth science support as well as preparing detailed
development models. Work has been performed at both the client's offices and
IRT's office in Colorado. |
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Block 406A, Ghadames Basin Algeria;
CEPSA Details 1992-1998
 International Reservoir Technologies provides all encompassing integrated
consulting services and ongoing reservoir management support for three volatile oil
reservoirs on this block. International Reservoir Technologies performed the well
test analyses for the first two wells drilled in the Rhourde el Khrouf Field. Following
the second well, the operator (CEPSA) obtained 2,500 km of 2-D seismic data through both
proprietary acquisition and data trades. There were five vintages of data in all,
and these were converted into a single consistent data set on the workstation by analyzing
480 line tie points and performing a grid balance in time, phase, frequency and
amplitude. The data were interpreted in the workstation, and structure maps made in
time and depth. The RKF structure itself was mapped along with the structure that
became the basis for the discovery of the giant Qoubba Field. International
Reservoir Technologies completed a sequence stratigraphic analysis to provide flow unit
definition to the reservoir models. Equation-of-state parameters were derived from
detailed phase behavior analyses. Landmark VIP has been used to model the effects of
gas re-injection in these reservoirs. Sensitivity analyses were performed to
determine a range of OOIP estimates and the corresponding range of recovery
estimates. Economic evaluations and studies were then performed to determine
project feasibility and unitization among multiple leaseholders in the Qoubba Field.
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Block 405, Ghadames Basin Algeria;
Burlington Resources
Details 1998-2002
International Reservoir Technologies provided engineering support assistance in the
construction of a simulation model of the MLN Field using Roxar's (formerly Smedvig) MORE
Compositional Simulation Model. Engineering support also included the design of a
study that would satisfy the Algerian Oil and Gas Ministry's requirements to support
commerciality. IRT also provided assistance to Burlington with critical
presentations before SONATRACH, as well as final ELA document preparation for the Algerian
Oil and Gas Ministry. Most of the support work was performed on site in London.
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Nigeria
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Uquo & Stubbs Creek, Nigeria; Prudence
Petroleum
Details
IRT was contracted to provide general engineering and earth science support for the
Uquo and Stubbs Creek Fields located in the Niger Delta. These studies were used in
part, to assist the client in deciding whether or not to submit petitions in pursuit of
operatorship.
Pls contact our office to obtain additional information on this project :
IRT_Information@irt-inc.com
or 303 279-0877
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Asia
China - IRT has provided simulation
guidance and expertise to help our clients investigate deliverability issues in a major
offshore gas field. |
Australia
Adelaide - IRT has participated in
seismic interpretation research programs with an objective of developing and implementing
new techniques to enhance areas of favorable hydrocarbon accumulation within tight gas
sands as well as gas reserve/deliverability evaluations and field study and reservoir
descriptions. Geographic locations include Coopers Basin, Amadeus Basin and the
southern part of the country. |
Mexico
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| Agave Field, Mexico; SSI / PEMEX
Details |
Akal Field, Cantarell Complex,
Mexico; PEMEX Details 1995
(Western Atlas subcontract)
 The Akal Field is a giant fractured carbonate reservoir that is
part of the large Cretaceous reef trend running along Mexico's North Yucatan coast.
Almost 40% of Mexico's daily oil production comes from the Akal, which is the largest oil
field in the Western Hemisphere. It is a, that i International Reservoir
Technologies has acted in an on-site advisory capacity for production engineering and
reservoir engineering. International Reservoir Technologies was involved in a
multi-disciplinary integrated project team that started with 3-D seismic data and well
logs, and resulted in an Eclipse reservoir simulation model. International Reservoir
Technologies provided guidance in planning future Enhanced Oil Recovery for the field and
also performed an analysis of artificial lift using Petroleum Experts PROSPER software,
and acted on behalf of PEMEX in outlining the planned artificial lift program to equipment
suppliers. International Reservoir Technologies proposed a combination of improved
gas-lift and electric submersible pumps to improve production in the field.
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Carmito Reservoir, Mexico; PEMEX
Details (Veritas subcontract)
Pls contact our office to obtain additional information on this project
:
IRT_Information@irt-inc.com
or 303 279-0877
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Middle East
Kuwait - Since 1999, IRT has been
conducting large integrated studies on major Kuwaitee reservoirs. These
studies involve a multidisciplinary project team and (extended)
training/mentorship opportunities in IRT's Colorado offices. Seismic interpretation,
petrophysics, geology and stratigraphy are utilized in deterministically guided stochastic
static models, history match and prediction cases that ultimately aid in field development
planning. |
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Middle East Field Locations
Details IRT was contracted to design a
field development plan for miscible gas injection in a frectured reservoir. This
project involved participation in an integrated project team that negotiated the
development contract, designed the surface facilities and development wells, and completed
the subsurface evaluation.
For additional information, please contact our office:
IRT_Information@irt-inc.com
or 303 279-0877
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Blk 30, Oman, Anadarko
Details IRT was contracted to perform an
integrated reservoir simulation study of the known gas reserves in the fractured carbonate
reservoirs of a lease in Oman. A simulation model of all of the pore-volume
contributing to flow in the known gas reservoirs in the lease was built using the
“most probable” properties identified in the data analysis and well test
modeling. That model was used to determine an optimum set of locations and
orientations for production wells for the reservoirs.
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South America
Colombia - Since 1995, IRT has been
assisting in updating and constructing compositional, full field models, using VIP and
Eclipse, becoming the basic tool for planning future depletion strategies for the
client. Projects have included two of the largest fields in Colombia (Cupiagua and
Cusiana), Portions of this work have been performed at the client's facility in
Colombia, including technology transfer and training. |
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Cupiagua Field, Colombia, Ecopetrol
/ BP Details 1995-2001
International Reservoir Technologies has performed a series of integrated studies of
the giant Cupiagua gas condensate reservoir in order to estimate reserves, define infill
and step-out drilling locations, and provide a complete evaluation of development and
surface equipment scenarios. In these studies, the complex structural geology of the field
was defined through the detailed interpretation of approximately thirty 2-D seismic lines,
which were tied in time, phase, amplitude and frequency to form a consistent data set.
Interpretation was performed with the Landmark SeisWorks program and was validated through
the construction of balanced structural cross-sections in the Cogniseis Geosec package.
All cores in the field were described in detail and were integrated into the reservoir
description through stratigraphic cross-sections and property maps.
This information was all incorporated into a compositional full field model of the
reservoir using the Landmark VIP software suite. The model was based on analyses of
several PVT tests for different wells that indicated the reservoir fluid to be a
near-critical point fluid with significant compositional variations with depth and
temperature. These PVT anomalies were all successfully modeled and incorporated into the
full field model. The compositional modeling work was used to test fourteen different
development scenarios in terms of ultimate recovery and production rate over time,
including several miscible gas displacement scenarios.
IRT continues to be involved in model studies of Cupiagua and satellite reservoirs in
support of field development efforts.
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Cusiana Field, Colombia; Ecopetrol / BP
Details 1997-2001
International Reservoir Technologies performed an integrated review of reservoir model
of the giant Cusiana Field. In this study, the work of a foreign operator in planning the
reservoir depletion was reviewed for ECOPETROL. The work by the operator included a
detailed reservoir description, a major simulation model, and detailed operating
strategies. Findings from the study assisted ECOPETROL in guiding and understanding these
strategies, as well as providing important refinements.
IRT assisted ECOPETROL in the construction of a new compositional full field model of the
Cusiana Field using VIP. This model is now the basic tool for planning future depletion
strategies for ECOPETROL. Part of the effort included technology transfer and training.
Portions of this work are performed on-site in Bogotá.
IRT continues to be involved in model studies of the Cusiana Reservoir in the support of
field development efforts.
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El Segundo Field, Colombia; Ecopetrol / Sipetrol
Details 1998-2000**
The reservoir exists in a regional syncline with a local anticlinal development.
In these studies, the complex structural geology of the field was defined through the
detailed interpretation of 2-D and 3-D seismic with statistical curvature analysis of dip
meter data. All cores in the field were described in detail and were integrated into
the reservoir description. Stratigraphic analysis identified nine separate facies
within the productive reservoir horizon. Extensive petrophysical data, including FMI
logs and over 300 thin-section analyses were integrated with engineering data to show that
the highly productive reservoir likely consisted of fractures only with no effective
matrix porosity.
**Study updated 2003-2004 for the operator, SIPETROL, under the revised field name,
Guaduas.
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Floreña Field, Colombia; Ecopetrol / BP
Details 1998
In August of 1998, International Reservoir Technologies, Inc. was contracted to perform
a simulation study of the Floreña Field defining sensitivity cases to evaluate principal
recovery factors of a gas injection project in a volatile oil field. The study
utilized existing reports / data and worked in concert with the client and the Colombian
Institute of Petroleum. Three scenarios were developed for OOIP with an evaluation
of various recovery possibilities using the simulation model to provide forecasts suitable
for economic evaluation of each scenario.
Contact project coordinator for additional information:
Tom
Gould
tlgould@irt-inc.com
or 303 279-0877
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| ongoing Venezuelan
projects . . . |
Bachaquero, Lake Maracaibo,
Venezuela; PDVSA Details 2002-2005
Bach-01 field is a heavy oil sand in the Lagunillas-Lago unit of the
Tía Juana District. The field has produced
over 420 million barrels from 641 wells. There
are numerous horizontal wells and over 1000 steam cycles into 350 wells. The Bach-01 Field
was put on production in August 1934 with the completion of the LL-231 well in the area
operated by the Former Lagoven, and the field has had continuous production for over 75
years. Both solution gas and compaction
(subsidence) have been important recovery mechanisms in the field. Recovery is about 6% of the estimated 6600 MMstb
POES. IRT is evaluating future recovery
strategies including continuous steam injection (ICV) and steam assisted gravity drainage
(SAGD), among other technologically available alternatives.
IRT is performing a full-integrated study of the field including development of a
digital database, complete reservoir description, construction of a 3D geological static
model with associated rock properties, oil-water contact definition, reserves, and
reservoir simulation.
Contact project coordinator for additional information:
Tom
Gould
tlgould@irt-inc.com
or 303 279-0877
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C2/VLE305, Lake Maracaibo,
Venezuela; PDVSA Details 2001-2002
C2/VLE305 is a highly complex reservoir both structurally and stratigraphically. International Reservoir Technologies utilized an
existing geological static model and constructed a 3D geocellular model for geostatistical
analysis of the field. A geocellular model
was then used for reservoir simulation involving history matching, water flood
optimization and analysis of WAG. Petrophysical review resulted in recomputation of
v-shale values and effective porosities. Errors in structural interpretation at the
faults were corrected with the aid of the interpreted seismic data and then modified
horizons for each of the C2 sand flow units were entered into a new IRMS geological
model. Predominate facies were mapped deterministically and combined with IRMS
software based facies object modeling as a basis for the geostatistical determination of
net-to-gross, porosities, and permeabilities for each of 319 layers. A 34 layer
simulation model of the area was built and history match developed. The field has
produced over 300 million barrels from the Eocene Misoa sands. The reservoir has 138 wells and about 1500 MMstb
POES.
Contact project coordinator for additional information:
Tom
Gould
tlgould@irt-inc.com
or 303 279-0877
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VLE196/VLE460, Lake Maracaibo,
Venezuela; PDVSA
Details 2001-2002
In November 2000 PDVSA contacted International Reservoir Technologies, Inc to conduct a
reservoir simulation study of the VLE196 and VLE460 areas in Lake Maracaibo,
Venezuela. The goals of this study were to provide an updated geologic
description for four (4) reservoirs, quantify OOIP and reserves, identify
opportunities to increase oil production and locate additional reserves and recommend
improved recovery techniques to maximize the field's potential within these
reservoirs.
The study was a corroborative effort between IRT and PDVSA staff members. A new
geologic model was constructed that ties VLE196/VLE460 to Block VI Lamar, Block VI East
and Block V Centro, thereby creating an internally consistent framework. This model
is tightly integrated between seismic, well logs, core date, oil-water contacts, pressure
tests and production data.
A 3D full-field reservoir simulation model has been history-matched to pressure and
production performance. Many late time wells have found small compartments of
bypassed oil that present a challenge for the history match. Fault sealing (and
opening) was a key variable required to reach a match. Faults in the study area are
not completely open or completely closed. Facies transition from one type to another
was found to create compartments.
In conclusion, after 20 years, large areas were left unswept by existing wells,
workovers and recompletions. To access the remaining oil, several drilling
opportunities, recompletions and/or waterflooding were Identified or future evaluation by
PDVSA., with an estimated ultimate recovery of 78% of the proven MOOIP and 44% of the
proven OOIP.
Contact project coordinator for additional coordinator:
Tom
Gould
tlgould@irt-inc.com
or 303 279-0877
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Block V Centro & VI East, Lake
Maracaibo, Venezuela; PDVSA Details
1998-2000
Block V Centro is a highly complex field both structurally and stratigraphically. The field has produced over 300 million barrels
from the Eocene Misoa sands. The study
included 260 wells and Block V Centro has a POES of about 1500 MMstb. International Reservoir Technologies performed a
fully integrated study of the Block V Centro field. The
reservoir description included interpretation of 225 km2 of 3D seismic,
detailed correlation of 44 flow units based on sequence stratigraphic and genetic
stratigraphic concepts within the 260 wells penetrating the Misoa B and C sands. Core description was used to associate
depositional facies with log signature. Within
a single stratigraphic unit, log signature was correlated between wells to provide an
areal distribution of facies. Petrophysical
analysis was performed on 61 wells calibrated to core measurements and previous
petrophysical analysis. Facies are assigned
unique rock properties based on the petrophysical analysis, thus representing the lateral
heterogeneity within a single stratigraphic layer.
Contact project coordinator for additional information:
Tom
Gould
tlgould@irt-inc.com
or 303 279-0877
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Lamar Block VI Field, Lake
Maracaibo, Venezuela; PDVSA
Details 1994-1998
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click on image to enlarge |
Lamar Block VI is a highly complex reservoir both structurally and stratigraphically.
The field has produced over 300 million barrels from the Eocene Misoa sands. For this
integrated study, International Reservoir Technologies first provided a detailed
description of all
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click on image to enlarge |
available cores, identifying key sequence stratigraphic surfaces, systems tracts, and
depositional facies. International Reservoir Technologies performed a detailed 3-D seismic
interpretation over the block using the Landmark SeisWorks software, integrating the
interpretation with abundant dipmeter data for fault and fold geometry control, well log
picks, and production data. Wavelet extraction was performed to provide an understanding
of the phase and frequency content of the data, and the results were used in generating
synthetic seismograms to tie well log picks to the seismic volume. Seven horizons have now
been mapped in time and depth, and these maps have been used as the basis for identifying
fifteen step-out and infill drilling prospects. International Reservoir
Technologies has built a detailed reservoir model of Block VI with 44 flow units and 40
major faults. Seismic attribute analysis and forward modeling has been performed to
determine the nature of amplitude anomalies apparent in the data set. These were
used as guides for reservoir mapping, and in determining current fluid contacts or
pressure compartments. The reservoir model contains in excess of 100,000 grid cells and
the simulation is being performed with the Schlumberger GeoQuest Eclipse simulation
system. The model was history matched and is now being used to predict the behavior of
planned infill drilling and water injection projects in the Block.
Contact project coordinator for additional information:
Tom
Gould
tlgould@irt-inc.com
or 303 279-0877
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United Kingdom
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