CO2 Stimulation of Oil Shale

Matt Balhoff, Kishore Mohanty

The invention of putting 10-25 transverse vertical fractures on long horizontal wells has made it possible to produce shale oil by primary recovery. The ultimate recovery by primary production, however, is low, between 5-10%. Improved recovery methods (e.g., CO2 flooding) must be developed for this huge resource.

Development of a New Marsh Funnel Rheometer for non-Newtonian Oil-Field Fluids

Matt Balhoff, Larry Lake, Paul Bommer


Techniques for measurement of fluid rheological properties are important for field operations in the oil industry, but existing methods are relatively expensive and the results can be subjective. Marsh Funnels are popular quality-control tools used in the field. In the normal measurements, a single point is used to determine an average viscosity.

Investigation of Fundamental Dynamic Petrophysical Properties of Gas-Bearing Shales

Matt Balhoff, Carlos Verdin


The hypothesis of this work is that dynamic petrophysical properties of shales cannot be measured accurately and reliably with traditional approaches because the physical laws governing fluid transport in nanoscale pores are fundamentally different from those of microscale pores of conventional reservoirs.

Multiscale Simulation of Flow and Transport in Carbon Sequestration

Matt Balhoff

Carbon sequestration, a potential solution for mitigating climate change, is inherently a multiscale process because transport mechanisms range from the nanometer scale to the kilometer scale. In carbon sequestration, CO2 is captured from emission gases as an industrial byproduct and then injected into potential storage sites for long-time storage.

Polymer Injectivity for a Horizontal Well with Coupled Formation-Wellbore Hydraulics

Matt Balhoff, Mojdeh Delshad, Chun Huh

Polymers are often injected into horizontal wells during EOR processes. During injection of these high-viscosity, non-Newtonian polymers, a significant pressure drop may occur along the length of the well. Accurate models for pressure drop in the well and polymer leakage into the reservoir are necessary for simulation but presently do not exist.