Optimizing CO2 Sweep Based on Geochemical and Reservoir Characterization of the Residual Oil Zone of Hess Seminole Unit


The Seminole San Andres Unit production history<br/>showing production peaks for primary,<br/>secondary, tertiary, and quaternary production types.
The Seminole San Andres Unit production history
showing production peaks for primary,
secondary, tertiary, and quaternary production types.
University of Texas at Austin
Website:  University of Texas at Austin
Award Number:  FE0024375
Project Duration:  12/01/2014 – 11/30/2019
Total Award Value:  $2,431,382
DOE Share:  $1,940,447
Performer Share:  $490,935
Technology Area:  Storage Infrastructure
Key Technology:  Characterization Field Projects (Onshore & Offshore)
Location:  Austin, Texas

Project Description

This project will perform a detailed geologic characterization and produce a new reservoir model of the largest producing residual oil zone (ROZ) in the Permian Basin, Hess Seminole San Andres Unit, based on core logging, petrography, and stratigraphic correlation of facies using core and wireline logging results. The new ROZ model will be used to design sophisticated multiphase fluid flow simulations to test different injection strategies. The team will compare the cost effectiveness of using a range of different strategies (such as use of horizontal injector wells, strategies to modify the viscosity of CO2 such as foam, and various strategies to alternate CO2 and water during injection) to optimize both oil production and incidental CO2 storage. Recommendations to optimize the sweep of CO2 in the reservoir will be presented to the operator of the reservoir for potential future implementation and testing.

Project Benefits

This project proposed a detailed characterization of a large, currently producing residual oil zone, Hess’s Seminole San Andres Unit. The project will investigate the controlling factors of sweep efficiency within a residual oil zone and identify the parameters by which CO2 storage and oil production can be maximized. This will help the Storage Program achieve its goals of estimating CO2 storage capacity ± 30%, and the safe and permanent long term storage of CO2. Specifically, this project will use a new reservoir model, together with natural chemical and isotopic tracers to constrain computer simulations of multiphase fluid flow in this residual oil zone reservoir. These simulations will be designed to evaluate strategies to increase CO2 storage as well as maximize oil production.

Contact Information

Federal Project Manager 
Joshua Hull: joshua.hull@netl.doe.gov
Technology Manager 
Traci Rodosta: traci.rodosta@netl.doe.gov
Principal Investigator 
Ian Duncan: ian.duncan@beg.utexas.edu

Click to view Presentations, Papers, and Publications