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What Is GasPal and Why Use GasPal?

What Is GasPal and Why Use GasPal?. Maraco Inc. 2014. What Is GasPal?. What Is GasPal?. GasPal is an integrated gas reservoir simulator that Integrates formation, tubing and surface lines Models multiple phase flow in formation and pipes

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What Is GasPal and Why Use GasPal?

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  1. What Is GasPal andWhy Use GasPal? Maraco Inc. 2014

  2. What Is GasPal? www.maraco.info

  3. What Is GasPal? • GasPal is an integrated gas reservoir simulator that • Integrates formation, tubing and surface lines • Models multiple phase flow in formation and pipes • Combines cluster of reservoirs with multiple layers • Allows multiple offtake points • Allows loops and splits in surface network • Models production and injection wells for storage reservoirs • Has different production modes such as Free Flow, DCQ and Nomination • Makes short, mid and long term planning with hourly, daily and monthly time step • Imposes quality constraints such as CO2 content www.maraco.info

  4. Integrated Nodal Analysis Surface Line Surface Tubing Reservoir Layer 1 Aquifer Gas Layer 2 Gas Layer 3 Gas www.maraco.info

  5. Modeling Each Reservoir With Arbitrary Grids Arbitrary grids allow fewer cells to model a reservoir effectively. Fewer cells translate to fast simulation. GasPal models well interference effectively with a grid tailored to the reservoir by the user. www.maraco.info

  6. Modeling Gas, Water and Oil Flows in Reservoir www.maraco.info

  7. Modeling Multiple Phase Flow in Tubing Industry standard correlations are used to model tubing pressure drop for multiple phase flow. Users can further calibrate each correlation against well test data, using a least squares method imbedded in an effective proprietary algorithm. www.maraco.info

  8. Modeling Fluid Flow in a Surface Network Loops and splits in surface lines Multiple offtake points Compressors and other surface facilities such as separators www.maraco.info

  9. Model Production System With Multiple Platforms and Complex Surface Network www.maraco.info

  10. Why GasPal? www.maraco.info

  11. GasPal Is Versatile • GasPal can model a production system as simple as a single simulation cell, single layer, or as complex as 50+ platforms with 800+ wells and 5000+ layers. • GasPal can make short, medium and long term forecasts with hourly, daily, weekly or monthly time steps. • GasPal has multiple production modes to model different scenarios: • Free flow without choke and other mechanical restrictions • Limited flow considering sand-control, pipe vibration, market demand, spare capacity, CO2 constraints and more. www.maraco.info

  12. GasPal Is Fast • A typical 30-years simulation run takes • Seconds for a single platform • Minutes for a moderate complex system • Less than 2 hours for a 800+ wells, 5000+layer system • Fast simulation allows users to make different case-studies to answer “what-if” questions quickly www.maraco.info

  13. GasPal Is User-Friendly: Input • GasPal runs on any Windows-based computers without special requirements. • GasPal has carefully crafted Graphic User Interface, designed by petroleum engineers, used and improved by petroleum engineers • Users can enter data • Using conventional methods such as typing data reservoir by reservoir, or • Using copy-and-paste from Excel through several “Grand Data Input” panels www.maraco.info

  14. GasPal Is User-Friendly: Output • GasPal has extensive built in output graphs (150+ types and growing) so users can analyze the simulation results without leaving GasPal. • GasPal also writes output results into MDB database files so users can use existing tools to do other analyses • GasPal can also export output into text/CSV files that can be readily loaded into Excel. www.maraco.info

  15. Sample Output and Menu for Output www.maraco.info

  16. GasPal Has Many Features • Convenient history match • Well gas, water and condensate rates • Flowing, wellhead and gauge pressure • Manifold pressure, rate and CO2 content • Numerous well inflow options • Standard Darcy’s law (drainage radius, k, h & skin) • AB method • C/n method, etc. • Numerous ways to model water and condensate productions • Darcy’s law and relative permeability curves • Empirical WGR/CGR curves for wells or layers www.maraco.info

  17. Continuously Improving • GasPal is updated regularly to add new features. Some of the recent additions are • Well and surface facility downtime • Platform maintenance scheduling • Gray well cutoff rate method • Non-adiabatic compression modeling • Liquid removal at various surface locations • Time-dependent surface network www.maraco.info

  18. Fast Services From Maraco • Quick response to answer users questions • Proactive to new features requested by users www.maraco.info

  19. Dr. Elmer Dougherty • President, founder Maraco. • Professor Emeritus, Petr & Chem Eng, USC - University of Southern California • SPE – Distinguished Member & Legion of Honor • 50 years of reservoir simulation and optimization experience. eld.maraco@gmail.com www.maraco.info

  20. Dr. Jincai Chang • Petroleum consultant and software engineer. • 23 years of experience in reservoir simulation and optimization • Teaching “Reservoir Simulation” at University of Southern California, Los Angeles, California, USA jincai@maraco-soft.com www.maraco.info

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