Geochemical and Hydrological Assessment Utilizing Super-Critical Flow Through Experiments to Quantify CO2 Usage for Secondary Oil Recovery, and Storage in Kansas
Department of Geology, Kansas State University, Manhattan, KS, USA
Our main objective is to develop a geochemical model to describe successively how CO2 can be used for EOR and storage in Kansas. For the EOR study, our proposed experiments will help in understanding, utilizing producing-zone rocks, how the CO2 will compete with the miscibility of the oil and allow for further recovery. Relating to CO2 storage, flow through experiments will help in investigating how Sc-CO2 will react under formation temperatures and pressures when injected into cored rock structures, while co-injecting formation water. Our efforts are focused on trying to recreate an in-situ environment and to determine reaction kinetics and thermodynamic data for understanding and estimating mineralization rates from a series of flow-through experiments in a laboratory setup and then extrapolate the data to the field. Understanding how the formation water and minerals will react upon injection of Sc-CO2 will allow us to determine how effectively the CO2 will compete for the miscibility of hydrocarbons and the efficacy of CO2 entrapment. The overarching result will be to understand the influences that Sc-CO2 will have within the subsurface. We expect to know progressively and as an end result: minimum miscibility pressure, fluid conductivity, pH, alkalinity, permeability and porosity changes caused by fluid pressures and mineral precipitation/dissolution, chemical changes and how those affect the mineralogy and fluid saturation states relating to the CO2. Upon completion of the experiments we will model a long-term simulation to determine the reaction pathways and plume movement of the injected Sc-CO2 by geochemical modeling.
AAPG Search and Discovery Article #90199 © 2014 AAPG Foundation 2014 Grants-in-Aid Projects