StimuFrac Compressibility as a Function of CO2 Molar Fraction

Compressibility values were obtained in a range of pressures at 250degC by employing a fixed volume view cell completely filled with PAA aqueous solution and injecting CO2 at constant flow rate (0.3mL/min). Pressure increase as a function of supercritical CO2 (scCO2) mass fraction in the mixture was monitored. The plot shows the apparent compressibility of Stimufrac as a function of scCO2 mass fraction obtained in a pressure range between 2100-7000 psi at 250degC.

At small mass fractions of scCO2 the compressibility increases probably due to the dissolution/reaction of CO2 in aqueous PAA and reaches a maximum at mCO2/mH2O = 0.06. Then, compressibility decreases showing a linear relationship with scCO2 mass fraction due to the continuous increase in density of the binary fluid associated to the pressure increase.

Data and Resources

Field Value
DOI 10.15121/1422769
accessLevel public
bureauCode {019:20}
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identifier https://data.openei.org/submissions/3568
issued 2016-04-29T06:00:00Z
landingPage https://gdr.openei.org/submissions/870
license https://creativecommons.org/licenses/by/4.0/
modified 2019-10-18T15:39:19Z
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programCode {019:006}
projectLead Sean Porse
projectNumber FY16 AOP 1324
projectTitle Reservoir Stimulation with Operational Monitory for Creation of Enhanced Geothermal Systems
publisher Pacific Northwest National Laboratory
resource-type Dataset
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Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • carbon-dioxide
  • ckan
  • co2
  • compressibility
  • fluid-compressibility
  • geo
  • geoss
  • geothermal
  • hydraulic-fracturing
  • mass-fraction
  • national
  • north-america
  • stimufrac
  • stimulation
  • united-states
isopen True
license_id cc-by
license_title Creative Commons Attribution
license_url http://www.opendefinition.org/licenses/cc-by
maintainer Carlos A. Fernandez
maintainer_email carlos.fernandez@pnnl.gov
metadata_created 2025-11-21T18:46:33.407451
metadata_modified 2025-11-21T18:46:33.407454
notes Compressibility values were obtained in a range of pressures at 250degC by employing a fixed volume view cell completely filled with PAA aqueous solution and injecting CO2 at constant flow rate (0.3mL/min). Pressure increase as a function of supercritical CO2 (scCO2) mass fraction in the mixture was monitored. The plot shows the apparent compressibility of Stimufrac as a function of scCO2 mass fraction obtained in a pressure range between 2100-7000 psi at 250degC. At small mass fractions of scCO2 the compressibility increases probably due to the dissolution/reaction of CO2 in aqueous PAA and reaches a maximum at mCO2/mH2O = 0.06. Then, compressibility decreases showing a linear relationship with scCO2 mass fraction due to the continuous increase in density of the binary fluid associated to the pressure increase.
num_resources 1
num_tags 17
title StimuFrac Compressibility as a Function of CO2 Molar Fraction