Basin-Scale Hydrologic Impacts of CO2 Sequestration; Scaling Calculations using Sharp Interface Theory
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Date
2008-10
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Abstract
Rational For Study:
1) The Mt. Simon Formation represents a viable saline water saturated reservoir for CO2 sequestration in the Illinois Basin and environments. It is thick (500 - >2500 ft.) and potentially has sufficient porosity and permeability to store large volumes of CO2.
2) However, freshwater withdraws from the Mt. Simon in urban areas (~ 280 Million MT/year) are on the same order of magnitude as CO2
production across the Illinois Basin (~ 80 Million MT/yr). Freshwater withdraws have had a significant hydrologic impact (600 ft drawdown
in Chicago area) at the regional scale. Will CO2 injection have a regional scale impact on the hydrology of the system by displacing brine in
the regions currently saturated by freshwater?
3) High number of wells required to inject 80 Million MT/yr CO2 may result in well-well interference patterns, high deviatoric pressures
(especially in the deep, low-permeability portions of the basin), and displacement of brines into other aquifers.
4) We ask the question: Is there an optimal place to locate most of the injection wells across the basin?
Description
This poster presentation was given at the American Association of Petroleum Geologists (AAPG) Eastern Section meeting, October 11-15, 2008, Pittsburgh, Pennsylvania.
Keywords
CO2 reservoir, Indiana, Indiana Geological Survey, carbon sequestration, Mount Simon, regional capacity, Mount Simon Sandstone
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Presentation