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EnSys
Energy Services
Technology,
Regulatory and Market Analyses
EnSys Energy provides quantified short- and long-term analyses of
United States and global refining sectors and markets to gauge
the impacts of new environmental regulations, shifts in crude
production and product demand patterns, process technologies,
shipping economics, tariffs and geo-political factors.
Some examples of our work include:
- For the American Petroleum Institute, we are evaluating
the market, refining and trade impacts of EPA's proposed
ultra-low sulfur diesel rule. Focus is on US
refining detail but fully integrated with the global
market and supply/demand system.
- For the U.S. Department of Energy and EPA, assessed the
investment and production cost impacts of U.S. refineries
meeting proposed standards for ultra low sulfur gasoline
and diesel fuels
- For a major U.S. oil company, projected and quantified
the impacts of gas-to-liquids capacity on world refining
investments and margins
- For a major industry organization, developed a
quantified outlook of the global petroleum supply system
in 2010 covering crude production and trade, refining
operations and investments, product trade, market pricing
and differentials; this against three different product
quality scenarios
- Gauged impacts of pending U.S. refinery emissions
regulations on future U.S. refinery utilization,
investment and trade
- Advised leading chemical company on refining impacts of
MTBE
Expert
Witness Services
EnSys Energy provides support to litigation and contractual
proceedings.
Some examples of our work include:
- Assessment of alternative methods to evaluate US West
Coast crude economics
- For the Senate of the US Virgin Islands, provided
detailed analysis of the potential impacts of the proposed
HOVENSA refinery joint venture on St. Croix, since
ratified. This included board level discussions, access to
confidential data, detailed assessment of financial,
process, investment and environmental data.
Optimization/LP
Modeling Systems
EnSys Energy provides development and reworking/enhancement of
complex linear programming modeling systems for the petroleum
and related industries. We have in-depth expertise in the main
modeling and optimizer systems, such as PIMS, GRTMPS, OMNI
language, Cplex, XpressMP and will undertake all programming
and turnkey model (re)development.
EnSys develops and maintains its sophisticated PC-based
global petroleum supply industry model, WORLD, for
quantitative evaluation of short-, medium- and long-term
scenarios. We have also developed the COMPLIN system for
linearized representation of the EPA Complex Model in refinery
LP models. Both WORLD and COMPLIN are available for licensing.
Some examples of our work include:
- Comprehensive redevelopment of the OMNI-based
manufacturing and distribution planning optimization
system for a major processing company
- Reconstruction of GRTMPS refinery planning model for
European refiner to incorporate latest technology, improve
refinery staff productivity and refinery profitability
- Assessment of coker economics using PIMS
- Installation, training and adaptation of EnSys' WORLD
model for a major U.S. oil company, for the U.S. Energy
Information Administration and the OPEC Secretariat
Hydrocarbon
Sector/Investment Planning
EnSys Energy undertakes quantitative planning and evaluations for
individual capital projects through to complete hydrocarbon
sectors.
Some samples of our work include:
- Appraisal of Caribbean refinery upgrade economics and
markets that got to the heart of the refinery's
competitive advantage and identified lower capital cost
options for the second phase of the rehabilitation
- Evaluation of the petroleum and electric sector energy
systems of Puerto Rico, leading to Report to Congress; the
report predicted the closure of island refineries barring
relaxation of the fiscal regime
- Analysis of refining sector development options as part
of a national petroleum sector master planning system for
Ministry of Energy, Ecuador; the study evaluated refinery
expansion options and exposed the inappropriateness of
investing in a large upgrading unit being considered
- National energy planning and modeling system for ETAP-
(Tunisia); enabled petroleum (production and refinery
supply) to be evaluated against gas and electric sector
options for meeting future national energy demand
EnSys
Yocum Services
Oil
and Gas Field Development Studies
EnSys Yocum designs and evaluates alternative field production
facilities development schemes (wells through
surface/gathering, separation, measurement and transmission
facilities) and optimizes designs for best life of field
performance consistent with reservoir/fluid properties data
and projections.
Some examples of our work include:
- For a major North Sea field, a technically feasible
three-phase subsea production system with 46 wells
connected to a 450' riser to the process platform was
designed and simulated over the life of the field, then
compared with a multiphase study based on installing a
well platform with the wells connected to the
separator/process platform by a 450' downcomer into a
trunkline flowing into the 450' riser. A detailed analysis
of costs, risks and future problems was made. The
alternative system designs were simulated over a 10-year
period with high accuracies obtained on the wells through
the risers etc.
- For Alaska Prudhoe Bay, we ran simulations of the
performance of 12" and 16" three-phase
trunklines gathering flows from multi-well clusters and
supplying the gas/oil separator flow station. An overall
plan and detailed design layouts of the flow elements and
facilities were prepared and formed the basis for project
recommendations. The maximum flow capacities of the system
trunklines and gas/oil separator trains were determined.
Simulations were carried out based on reservoir
predictions of flowing bottom hole pressures and fluid
properties each year for 10 years.
- For SUCO Egypt, we simulated the gas lifting of the Ras
Budran wells and determined the depth of injection points,
location of gas lift valves and gas injection rates. We
calculated compressor horsepower requirements to produce
the optimum oil producing rates. We designed facilities
modifications to balance the total system and simulated
the application of downhole submergible pumping Ras Fanar
wells.
Production
Facilities Design/Performance
EnSys Yocum undertakes focused simulation studies of existing or
new production systems to identify and remove bottlenecks,
raise throughput and optimize separation efficiencies.
Some example of our work include:
- For Unocal (offshore Indonesia), we simulated offshore
two-phase and onshore multistage, 2/3-phase separators to
assess capacity constraints and the potential for raising
production, including by enabling produced water to be
discharged offshore rather than transmitted ashore. Our
simulations of water-in-oil and oil-in-water on
three-phase separations closely matched actuals. Our
results confirmed the severe under-sizing of the offshore
separator. Design options were presented to debottleneck
this and enable production to be raised by 30,000 bpd.
- For Preussag, Venezuela, we modeled and designed a
multiphase trunkline system with feeder lines along the
path for an existing field with low wellhead pressures. We
optimized flowlines versus pump and compressor stations.
The final design achieved several million dollars in
capital and projected operating cost savings versus
client's initial concept.
- For Caltex, Indonesia, we analyzed horizontal and
vertical separator design options for heavy oil, high
water cut, high viscosity emulsion. Our studies prevented
the development of severely undersized separators and led
the client to adopt novel design concepts saving millions
of dollars versus the correctly sized conventional
separators we designed.
Multiphase
Flow Measurement and Reconciliation
EnSys Yocum provides software and support services to enhance the
performance of multiphase and wet gas meters, reconcile mass
balances and flows versus multiphase and single-phase meters.
We also supply "virtual metering" technology for
complete flow measurement and reconciliation across a
producing system.
Some examples of our work include:
- For Texaco North Sea Erskine field, (HPHT with
retrograde condensation), we implemented our PVT Meter
software to correct flowrates from the six Erskine Framo
multiphase meters. PVT Meter software was installed
offline and integrated within the shore-based production
workstation, correcting flows on a daily basis.
- For Roxar ARCO Alaska, we integrated our PVT Meter
software into Roxar (MFI) multiphase meters for real time
application in two multiphase meters with partial
separation configuration. SPE paper 54605,
"Multiphase-Flow Measurement System of High-GOR
Applications," discusses this application, which
achieved high accuracies
Multiphase
Flow Simulation and Metering Software
EnSys supplies field-proven and accurate multiphase
pressure, temperature, flow simulation software for facilities
design and fluid properties (PVT) software to improve
multiphase meter accuracy and utility.
- GOSPSIM
/ PRODSIM simulates production facilities from
either the wellhead or the reservoir pay. PTQ algorithms
handle all line inclinations and flow regimes enabling
integrated analyses across the whole flow system. (There
is no requirement to switch between algorithms depending
on piping inclination etc.) Provides
rigorous design and performance simulation of two- and
three-phase separators. Has been proven on over 18 million
bpd oil production. Pressure/flow accuracies +/- 2-4% for
wells, 3-8% for surface facilities and 5-15% for extreme
conditions such as slug flow in hilly terrain. Supporting
databank on over 65 reservoir fluids
- TRUNKSIM is a multiwell, trunkline network extension of
PRODSIM. It converges pressures, temperatures and flows
across entire flow system.
- PVT Meter corrects multiphase/wet gas meter
gas/oil/water phase flow rates at meter conditions,
converts these accurately to standard, downhole and other
user-specified conditions, thereby improves
field/reservoir management and fiscal sales accounting.
- Virtual MPM simulates and calculates flows across
an entire production system from wells through surface
facilities and separators, enabling flow measurement,
hydrocarbon mass balancing, redundancy, reconciliation and
error checking on conventional meters across the system
(e.g. wellhead and separator outlets).
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