@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix gsp: <http://www.opengis.net/ont/geosparql#> .
@prefix locn: <http://www.w3.org/ns/locn#> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://data.amerigeoss.org/dataset/54ed9dc0-7f77-4e46-8155-990a8ed0854c> a dcat:Dataset ;
    dct:description """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.""" ;
    dct:identifier <https://data.openei.org/submissions/3568> ;
    dct:issued "2016-04-29T06:00:00+00:00"^^xsd:dateTime ;
    dct:modified "2019-10-18T15:39:19+00:00"^^xsd:dateTime ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((-116.7502 35.2279, -112.8941 35.2279, -112.8941 39.3634, -116.7502 39.3634, -116.7502 35.2279))"^^gsp:wktLiteral ] ;
    dct:title "StimuFrac Compressibility as a Function of CO2 Molar Fraction" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Carlos A. Fernandez" ;
            vcard:hasEmail <mailto:carlos.fernandez@pnnl.gov> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/54ed9dc0-7f77-4e46-8155-990a8ed0854c/resource/71dfcdf8-f17f-4c82-94df-8b3677e957fa> ;
    dcat:keyword "amerigeo",
        "amerigeoss",
        "carbon-dioxide",
        "ckan",
        "co2",
        "compressibility",
        "fluid-compressibility",
        "geo",
        "geoss",
        "geothermal",
        "hydraulic-fracturing",
        "mass-fraction",
        "national",
        "north-america",
        "stimufrac",
        "stimulation",
        "united-states" .

<https://data.amerigeoss.org/dataset/54ed9dc0-7f77-4e46-8155-990a8ed0854c/resource/71dfcdf8-f17f-4c82-94df-8b3677e957fa> a dcat:Distribution ;
    dct:description "This excel sheet reports compressibility of PNNL's StimuFrac fluid as a function of CO2 concentration" ;
    dct:format "XLS" ;
    dct:issued "2021-06-24T00:13:49.183909"^^xsd:dateTime ;
    dct:modified "2025-11-21T18:46:33.397518"^^xsd:dateTime ;
    dct:title "StimuFrac Compressibility.xlsx" ;
    dcat:accessURL <https://gdr.openei.org/files/870/StimuFrac%20compressibility.xlsx> ;
    dcat:mediaType "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" .

<https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> a foaf:Agent ;
    foaf:name "US Migrating" .