Aneth Data and Monitoring Summary

Data and Monitoring Activity	Comments	Investigative Lead or Compiler of
Data

Time-lapse Vertical Seismic Profiling (VSP)	Analysis in progress.
Intended to result in time-lapse images of plume development and measure
of geophysical property changes affected by CO22 injection.	Los Alamos
National Lab

Microseismic monitoring	Monitoring induced seismicity. Analysis in
progress. Intended to result in time-space relationships of microseismic
source locations, correlated with production/injection activity and
interpretation of results.	Los Alamos National Lab

Interwell tracers tests	Water-based test complete, CO2-conveyed test
just starting. Measuring time-space flow pattern of water and CO2 in
Aneth reservoir and evaluating novel tracers for CO2 flow.
EGI-University of Utah

Production and Injection Records from monitor areas	Being updated
periodically	Resolute Natural Resources

CO2 soil flux measurements

NM-Tech

Fracture analysis of cores	Memo report available	Sandia National Labs

Summary of well construction records

EPA

Surface fracture and banding study	Field work completed, report in
progress	Utah Geologic Survey

Analysis of Gothic Shale core – the Aneth Reservoir seal rock.
Terra-Tek tests to be conducted – includes petrography, geochemistry
analysis, mechanical properties (Terra-Tek proposed tests summary
available upon request).	Laboratory measurements just starting at Terra
Tek, preliminary fracture analysis completed. Poro-Technology to conduct
mercury capillary pressure measurements. Sandia will conduct xray
diffraction, backscattering electron imaging, fracture characterization,
and laser scanning confocal microscopy	Utah Geological Survey, Sandia
National Labs

Reservoir flow model framework for Aneth Unit	Formation tops (structure
and isopach maps), digitized well logs (porosity), core plug analysis
for permeability vs porosity relationship. Will result in flow
simulation results.	EGI-University of Utah, Utah Geological Survey

Self-potential monitoring	Acquisition and analysis underway. An
experimental technique being tested for effectiveness in detecting
subsurface CO2 flow	AIST, Japan



