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October 2004

GasPal. Cutting-Edge Software for Managing Gas Production and Storage Operations. October 2004. GasPal. Goal of forthcoming initial release targeted for 1 st Quarter, 2005:

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October 2004

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  1. GasPal Cutting-Edge Software for Managing Gas Production and Storage Operations October 2004

  2. GasPal Goal of forthcoming initial release targeted for 1st Quarter, 2005: Accurate prediction of performance of gas storage reservoir/compressor/pipeline systems with a speed that allows hourly/daily scheduling of compressors for production and injection. Schedules obtained are efficient and economic. Given a complete database GasPal allows operations to be quickly rescheduled in response to new opportunities or unexpected changes in available equipment and/or supply/demand requirements. GasPal, focusing on operational planning, is a logical counterpart to Maraco’s GasTopsoftware, which performs optimal investment planning for storage operations.

  3. GasPalCharacteristics • GasPal: foundation is a PC-based gas reservoir simulator. • GasPal: complex surface network may include splits, loops and multiple offtake points. • GasPal: each of several reservoirs may have up to 5 producing layers • GasPal: GRIDDER™ preprocessor inserts arbitrary number of computing cells into each reservoir. • GasPal: simulates injection and production or a mixture of the two, providing full storage scheduling flexibility. • GasPal: hourly, daily or monthly time steps accommodate short-, mid- and long-term planning needs. • GasPal: optimizes service allocation and size of possible compressor configurations.

  4. Operational Planning Scope • Short-term operation: hourly time steps for two weeks. Useful for immediate injection/withdrawal planning. • Mid-term planning: daily time step for one year. Useful for overall storage planning. • Long-term production : monthly time step for 30 years. Useful for regular gas reservoir production or blowdown.

  5. Surface Flow Capabilities:Splits, Loops & Offtake Points Split flow at node Choke total flow or either flowline Produce against or inject with a given back pressure Produce or inject a requested rate profile

  6. Surface Line Capabilities:Multiple Reservoirs Choke each producing cell and/or reservoir to produce requested rate Each cell in each reservoir may have different characteristics

  7. Surface Line Capabilities:Compressor Optimization Work is now underway on GasPal’s compressor scheduling capability Compressor locations and sizes optimized to maximize withdrawal, injection and inventory revenues

  8. Reservoir: Arbitrary Number Of Simulation Cells Computing mesh generated by GRIDDER Faults

  9. Reservoir:Multiple Layers

  10. GasPal Results From Current Development Version Of GasPal October 2004

  11. Interface Layout Surface network Reservoirs Offtake points Output Results

  12. Reservoir Output

  13. Flow Rate Through Each Pipe

  14. Pressure Drop Across Each Pipe

  15. Offtake Rate: Fixed Back Pressure

  16. Pressure: With Offtake Rate Fixed

  17. Bi-directional Flows • Gas flow direction is determined by system pressure distribution

  18. Reverse Flow Dictated by pressure at end nodes, flow can be reversed Reversed flow displayed as “negative”

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