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Gas Hydrates Reserve Characterization Using Thermo-Hydro-Mechanical Numerical Simulation: A Case Study of Green Canyon 955, Gulf of Mexico

Author

Listed:
  • Sulav Dhakal

    (Formerly Craft and Hawkins Department of Petroleum Engineering, Louisiana State University, Baton Rouge, LA 70803, USA)

  • Ipsita Gupta

    (Craft and Hawkins Department of Petroleum Engineering, Louisiana State University, Baton Rouge, LA 70803, USA)

Abstract

The Gulf of Mexico is a widely explored and producing region for offshore oil and gas resources, with significant submarine methane hydrates. Estimates of hydrate saturation and distribution rely on drilling expeditions and seismic surveys that tend to provide either large-scale estimates or highly localized well data. In this study, hydrate reserve characterization is done using numerical simulation at Green Canyon block 955 (GC955). In addition, coupled thermo-hydro-mechanical (THM) simulation results show that hydrate saturation and geobody distribution are determined by the thermodynamic conditions as well as reservoir structures, stratigraphic differences, and permeability differences. Hydrate formation due to upflow of free gas and dissociation due to gas production and oceanic temperature rise due to climate change are simulated. The abundance of free gas under the hydrate stability zone and favorable pressure and temperature meant little hydrate was depleted from the reservoir. Furthermore, the maximum displacement due to warming reached 0.5 m in 100 years and 4.2 m in 180 days based on a simulation of constant production of methane gas. The displacement direction and magnitude suggest that there is little possibility of slope failure. Therefore, the GC955 site studied in this paper can be considered a favorable site for potential hydrate exploitation.

Suggested Citation

  • Sulav Dhakal & Ipsita Gupta, 2023. "Gas Hydrates Reserve Characterization Using Thermo-Hydro-Mechanical Numerical Simulation: A Case Study of Green Canyon 955, Gulf of Mexico," Energies, MDPI, vol. 16(7), pages 1-15, April.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:7:p:3275-:d:1117152
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    References listed on IDEAS

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    1. Liu, Xiaoqiang & Qu, Zhanqing & Guo, Tiankui & Sun, Ying & Rabiei, Minou & Liao, Hualin, 2021. "A coupled thermo-hydrologic-mechanical (THM) model to study the impact of hydrate phase transition on reservoir damage," Energy, Elsevier, vol. 216(C).
    2. E. Dendy Sloan, 2003. "Fundamental principles and applications of natural gas hydrates," Nature, Nature, vol. 426(6964), pages 353-359, November.
    3. Ewa Burwicz & Lars Rüpke, 2019. "Thermal State of the Blake Ridge Gas Hydrate Stability Zone (GHSZ)—Insights on Gas Hydrate Dynamics from a New Multi-Phase Numerical Model," Energies, MDPI, vol. 12(17), pages 1-24, September.
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