Numerical model illustrating flow focusingUT GeoFluids is managed by the University of Texas Institute for Geophysics (UTIG) and is currently supported by 10 energy companies at a cost of ~ $50,000/year. We are at the start of a 10-year effort entitled GeoFluids2020. Our results are used to predict pressure and stress, design stable and safe drilling programs, and predict hydrocarbon migration and entrapment. We study the state and evolution of pressure, stress, deformation and fluid flow through experiments, models, and field study:

  1. Experimental: We analyze fabric, acoustic, electrical, and material properties of mudrocks : 0.1-100 MPa.
  2. Poromechanical Modeling: We develop and apply coupled models to link realistic rheologies, deformation, stress (shear and normal), and pore pressure.
  3. Field Study: We analyze pore pressure, stress, and deformation in both conventional and unconventional basins.

We produce innovative concepts and analysis workflows that couple geology and geomechanics to predict and interpret pore pressure and stress in the subsurface. We have

  • developed online software that predicts reservoir pressure,
  • released databases and material models that describe mudrock material behavior, and
  • developed workflows to predict stress in salt systems and thrust belts.

Our new research aims to develop a unified approach that incorporates stress dependency, creep, mineralogical transformation, and loading path to illuminate the state and evolution of pressure and stress in basins. We are applying this approach to develop two and three-dimensional whole earth models that improve well design, real-time drilling, borehole stability, reservoir simulation and seismic imaging.

Click here for more details about the Consortium, or contact the Consortium Co-Directors, Dr. Peter Flemings and Dr. Jack Germaine.

UT GeoFluids 2021 April 6th - April 8th, 2021. Thank you to everyone who attended! Members will find the recorded talks and abstracts under Presentations on the consortium member pages.

BOOK: Peter Flemings's book, A Concise Guide to Geopressure, is now available. Get your copy here:
This book arose from the UT GeoFluids Consortium and it summarizes many of the concepts and case studies we have presented and you have contributed to.

Summer: We are excited to announce that UT GeoFluids grad student Landon Lockhart has begun a summer internship with Chevron's Geomechanics team.

May 22: UT GeoFluids student, David Wiggs, has graduated from the Jackson School of Geosciences with a master's in geological sciences. He will soon be starting a new job with EOG Resurces in San Antonio.

January 12: A paper by Jean Joseph d’Hooghvorst, Maria Nikolinakou, Toby Harrold, Oscar Fernandez, Peter Flemings and Alejandro Marcuello has been accepted for publication in the journal, Basin Research.

View all UT GeoFluids publications on the publications page
Members can access copies of publications at the Member Area Publication Site
If you don't know your password please contact Felicia Garcia-Hildenbrand.

Hooghvorst, JJ, Nikolinakou, MA, Harrold, TWD, Fernandez, O, Flemings, PB, Marcuello, A., 2021, Geologically constrained evolutionary geomechanical modelling of diapir and basin evolution: A case study from the Tarfaya basin, West African coast. Basin Research.

Bhandari, A.R., Flemings, P.B., Hofmann, R.,2021, The dependence of shale permeability on confining stress and pore pressure. Journal of Natural Gas Science and Engineering.

Flemings, P. B., Phillips, S.C., Boswell, R., Collett, T. S., Cook, A., Dong, T., Frye, M., et al., 2020, Pressure coring a Gulf of Mexico deep-water turbidite gas hydrate reservoir: Initial results from The University of Texas-Gulf of Mexico 2-1 (UT-GOM2-1) Hydrate Pressure Coring Expedition: AAPG Bulletin, v. 104, no. 9, p. 1847-1876,

Daigle, H., Reece, J.S., Flemings, P.B., 2020, A Modified Swanson Method to Determine Permeability from Mercury Intrusion Data in Marine Muds. Marine and Petroleum Geology.

Wiggs, D.M., Flemings, P.B., Spikes, K.T., Nikolinakou, M.A., 2020, Mudrock Velocity Andisotropy Based on History of the Full Strain Tensor. Society of Exploration Geophysicists.

Heidari, M., Nikolinakou, M. A., and Flemings, P. B., 2020, Modified Cam-Clay Model for Large Stress Ranges and its Predictions for Geological and Drilling Processes. Journal of Geophysical Research: Solid Earth, 125(12).

UT GeoFluids produces innovative concepts and analysis workflows that couple geologic loading and fluid flow to predict pore pressure and stress in the subsurface. These include:

  • UT Centroid: online software to predict reservoir pressure as a function of reservoir geometry and mudstone permeability.
  • Seismic Pressure Prediction Integrated with Geomechanical Modeling: a highly innovative workflow integrating seismic velocity data with geomechanical modeling to predict pressure and the full stress tensor.
  • UT-FAST-P3: An online, educational tool allowing users to predict and compare pore pressure using the full stress tensor while demonstrating why it is important to go beyond vertical effective stress (VES) models.

Learn more.