OF-04-01 Evaluation of Bottom Hole Temperatures in the Canon City Embayment, Hugoton Embayment, and North Park, Paradox, Piceance, Raton and Sand Wash Basins

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Citation: Dixon, Jeanette. “OF-04-01 Evaluation of Bottom-Hole Temperatures in the Canon City Embayment, Hugoton Embayment, North Park, Paradox, Piceance, Raton, and Sand Wash Basins of Colorado.” Geothermal Resource Assessment. Open File Reports. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 2004.

Description

This report provides an accurate database of bottom-hole temperatures (BHTs) and completes the survey of bottom-hole temperature data across the state. The Denver and San Juan basins were covered in OF-02-15. Maps and plots of temperature versus other criteria are included, as well as an Excel database of all the measurements. Digital ZIP download. OF-04-01D

From the author’s notes:

The maximum recorded temperature or bottom-hole temperature (BHT) is usually recorded when logging an oil or gas well. It is used in wellbore management, oil and gas prospecting, and reservoir analysis for calculating reserves. Edwardson, and others (1962), Middleton (1982), Fertl and Wichmann (1977), and Fertl (1978, 1985) have described various influences on the measured BHT and how to calculate a true temperature, compensating for those influences. Bottom-hole temperatures were studied by Dixon (2002) to see if the raw, unadjusted temperatures could be of value. In both the Denver Basin and the San Juan Basin of Colorado, data indicated an increase in temperature possibly related to deep basement structures.

The purposes of this study are to complete a statewide bottom-hole temperature database (in conjunction with the CGS OF-02-15, “Evaluation of bottom-hole temperatures in the Denver and San Juan Basins of Colorado”) and to determine if any geologic trends noticeably influence BHTs in the Canon City, Hugoton, North Park, Paradox, Piceance, Raton, and Sand Wash basins. Detailed analyses are beyond the scope of this project.

A total of 5,039 BHTs were recorded for the seven basins included in this study. These BHTs, in combination with the 10,908 BHTs acquired in the Denver and San Juan basins study, make a database of 15,946 bottom-hole temperatures for the nine oil and gas basins of Colorado. This is a statewide BHT sampling rate of over one-fourth of the oil and gas wells in the Colorado Oil and Gas Conservation Commission (COGCC) database.