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Title: Characterization of heterogeneity in the Heletz sandstone from core to pore scale and quantification of its impact on multi-phase flow

In this paper we present the results of an extensive multiscale characterization of the flow properties and structural and capillary heterogeneities of the Heletz sandstone. We performed petrographic, porosity and capillary pressure measurements on several subsamples. We quantified mm-scale heterogeneity in saturation distributions in a rock core during multi-phase flow using conventional X-ray CT scanning. Core-flooding experiments were conducted under reservoirs conditions (9 MPa, 50 °C) to obtain primary drainage and secondary imbibition relative permeabilities and residual trapping was analyzed and quantified. We provide parameters for relative permeability, capillary pressure and trapping models for further modeling studies. A synchrotron-based microtomography study complements our cm- to mm-scale investigation by providing links between the micromorphology and mm-scale saturation heterogeneities.
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [5] ;  [1]
  1. Stanford Univ., Stanford, CA (United States)
  2. Univ. of Science & Technology of China, Anhui (China)
  3. Imperial College, London (United Kingdom)
  4. Argonne National Lab. (ANL), Argonne, IL (United States)
  5. SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
International Journal of Greenhouse Gas Control
Additional Journal Information:
Journal Volume: 48; Journal Issue: P1; Journal ID: ISSN 1750-5836
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Stanford University
Country of Publication:
United States
54 ENVIRONMENTAL SCIENCES; CT scanning; capillary heterogeneity; capillary pressure; carbon sequestration; core flooding; Heletz core; mercury intrusion porosimetry; micro-tomography; relative permeability
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1425693