High resolution fiber-optic distributed temperature sensing logs from the Illinois Basin Decatur Project (IBDP) in Decatur, IL were used to model the thermal profile in the Illinois Basin.
University of Illinois Campus Deep Direct-Use Feasibility Study - Subsurface Temperature Profile
This paper describes the development of a basin-scale model of geologic carbon sequestration (GCS) in the basal sandstone of the Illinois Basin.
basin scale modeling for co2 sequestration in the basal sandstone reservoir
This paper identifies areas where ground water in the Illinois basin is moving vertically should be reflected by temperature anomalies. To test this hypothesis, an isothermal map for a depth of 500 feet was constructed, based on bottom hole temperatures of deep wells. This map was compared with a theoretical isothermal map for a depth of 500 feet that was made by projecting temperature gradients (calculated from the thermal conductivities of the rock) downward from the surface where mean annual air temperatures were known. The residual temperature map that was made on the basis of this comparison (calculated minus observed temperature) shows several warm and cool anomalies that are postulated to be discharge and recharge areas, respectively. Analysis of the curvature of the earth's thermal profile calculated for the basin suggests that approximately 59,000 acre‐feet of ground water per year are discharged upward from the deep rocks in the Illinois basin.
groundwater discharge in the illinois basin as suggested by temperature anomalies
Summary of research undertaken at Illinois Basin - Decatur Project, which includes distributed temperature sensing (DTS) logs of well CCS#1 pre- and post-injection (Slide 12).
deep well monitoring and veritification at the illinois basin decatur project
Geothermal gradients of North America based on corrected bottom-hole temperatures.
geothermal gradient map of north america
Bottom-hole temperatures from the Illinois Basin in central Illinois. From this data analysis we found the large variation in temperature at each depth interval prohibited us from using this data alone to determine the thermal gradient. Most temperature records lacked information about when the measurement was taken in reference to the drilling operation or injection and extraction activities. This information is critical so that measurements affected by heating from drilling and brine flow can be disregarded. Includes formation temperature versus depth plot.