Methods to measure contact angles in scCO2-brine-sandstone systems
- National Energy Technology Lab. (NETL), Morgantown, WV (United States); National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States); Oak Ridge Inst. for Science and Education (ORISE), Oak Ridge, TN (United States)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Univ. of Texas, Austin, TX (United States)
- National Energy Technology Lab. (NETL), Morgantown, WV (United States); National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)
Numerous methods are used to measure contact angles (θ) in multiphase systems. The wettability and θ are primary controls on CO2 residual trapping during Geologic Carbon Storage (GCS) and determining these values within rock pores is paramount to increasing storage efficiency. One traditional experimental approach is the sessile drop method which involves θ measurements on a single image of droplets. More recent developments utilize X-ray micro-computed tomography (CT) scans which provide the resolutions necessary to image in situ θ of fluids at representative conditions; however, experimental micro-CT data is limited and varied. To further examine θ distributions in supercritical-CO2-brine-sandstone systems, a combination of manual and automated θ measurement methods were utilized to measure θ using both sessile drop and micro-CT images of two sandstone cores. Here, the purpose of this work was threefold: (1) compare two current and two new θ measuring methods using micro-CT images of scCO2-brine-sandstone systems; (2) determine how traditional experimental method (sessile drop) θ results compare to in situ θ results (micro-CT); and (3) determine if the Matlab Contact Angle Algorithm (MCAA) from Klise et al. (2016) can be used to measure θ scCO2-brine-sandstone systems.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Center for Geologic Storage of CO2 (GSCO2); National Energy Technology Lab. (NETL), Morgantown, WV and Pittsburgh, PA (United States)
- Sponsoring Organization:
- FE; USDOE
- OSTI ID:
- 1509708
- Alternate ID(s):
- OSTI ID: 1544797
- Report Number(s):
- NETL-PUB--22325
- Journal Information:
- Advances in Water Resources, Journal Name: Advances in Water Resources Journal Issue: C Vol. 122; ISSN 0309-1708
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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