Fundamental Understanding of Methane-Carbon Dioxide-Water (CH₄-CO₂-H₂O) Interactions in Shale Nanopores under Reservoir Conditions (Quarterly Report)

Technical Report · Mon Oct 28 00:00:00 EDT 2019

DOI:https://doi.org/10.2172/1573135· OSTI ID:1573135

Wang, Yifeng ^[1]

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1. Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Shale is characterized by the predominant presence of nanometer-scale (1-100 nm) pores. The behavior of fluids in those pores directly controls shale gas storage and release in shale matrix and ultimately the wellbore production in unconventional reservoirs. Recently, it has been recognized that a fluid confined in nanopores can behave dramatically differently from the corresponding bulk phase due to nanopore confinement (Wang, 2014). CO₂ and H₂O, either preexisting or introduced, are two major components that coexist with shale gas (predominately CH₄) during hydrofracturing and gas extraction.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE Office of Fossil Energy (FE), Oil & Natural Gas
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 1573135
• Report Number(s): SAND-2019-13223R; 680932
• Country of Publication: United States
• Language: English