Detailed Geologic Characterization of Core and Well Data from the Weber and Madison Formations and Associated Seals at a Potential CO2 Sequestration Site in Southwest Wyoming: Definining the Lithologic, Geochemical, Diagenetic, and Burial Histories Relative to Successful CO2 Storage

  • J. Fred McLaughlin
  • Mario Garcia-Gonzalez
Part of the Springer Environmental Science and Engineering book series (SPRINGERENVIRON)


The Paleozoic strata of the Rocks Springs Uplift (RSU), southwestern Wyoming, have been identified as potential CO2 storage reservoirs. The lithologic, diagenetic, geochemical, and burial histories of RSU strata were investigated to aid in the geologic characterization of the study site. Log data and core samples were collected from a 12,810 ft (3904 m) stratigraphic test well on the northeast flank of the RSU. The Weber and Madison Formations were found to have porous zones in distinct lithofacies: Weber eolianites have porosity and permeability values that average 6.3 % and 2.7 mD, and Madison dolostones have porosity and permeability values that average 13.1 % and 22.7 mD.

Dolomitization, cementation, pressure solution, dissolution, sulfate reduction, and other diagenetic reactions were largely responsible for the creation or destruction of porosity in these formations. Geologic characterization indicates that both formations are heterogeneous but contain suitable reservoir zones for injection and sequestration. Overall, the Madison Limestone has superior reservoir qualities.

Analysis of primary sealing lithologies at the study site suggests that the lower Triassic section, Amsden Formation, and upper part of the Madison Limestone can confine injected CO2. Analyses of the sealing formations established that porosity is lower than 4.6 % and micropores are dominant, permeability is below 0.005 mD, and displacement pressures exceed 900 psi (6205 kPa).

Local and regional burial history reconstruction models were completed to augment the reservoir sequestration pressure management plan. A 1-D burial history reconstruction of the study site shows the sedimentary column reaching a maximum depth greater than 8400 m (27,600 ft), maximum temperatures greater than 150 °C (302 °F), and maximum pressures approaching 255 MPa (2.5 kbars). Regional 2-D burial and geochemical history models show that several source rocks have re-entered the hydrocarbon window.

Robust geologic characterization of reservoirs and seals from the study site and interpretation of their diagenetic, geochemical, and burial histories suggest that the Rock Springs Uplift has geologic conditions suitable for the injection and storage of CO2.


Calcite Cement Diagenetic Alteration Burial History Thermochemical Sulfate Reduction Quartz Overgrowth 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  1. 1.Carbon Management InstituteLaramieUSA
  2. 2.Universidad Industrial de SantanderBucaramangaColombia

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