Title page for ETD etd-11102010-200649


Type of Document Master's Thesis
Author D'Aquin, John Adam
Author's Email Address adam.daquin@gmail.com
URN etd-11102010-200649
Title Geothermal Energy Potential of South Bossier Parish, Louisiana
Degree Master of Science (M.S.)
Department Geology & Geophysics
Advisory Committee
Advisor Name Title
Nunn, Jeffrey A. Committee Chair
Hanor, Jeffrey S. Committee Member
White, Christopher D. Committee Member
Keywords
  • cotton valley
  • geothermal
Date of Defense 2010-09-03
Availability unrestricted
Abstract
Northwestern Louisiana sits atop a geothermal anomaly that stretches across Eastern

Texas and into Southern Arkansas. Geothermal gradients are observed in this area that are

greater than the Gulf Coast average of 22-26oC/km. South Bossier Parish, in particular, could be

an ideal location for economic production of electricity by conventional geothermal or enhanced

geothermal projects due to ideal geothermal production temperatures of 120-180oC at a relatively

shallow depth of approximately 3-5 km. A localized geothermal of 35oC/km gradient was

determined using bottom-hole temperatures (BHTs) from 147 wells. At approximately 3.2 km

depth, temperatures of approximately 130oC within the geopressured sands of the Lower Cotton

Valley are the best potential target. The Lower Cotton Valley is a tight, gas-bearing sand that is a

target for hydrocarbon production by the oil and gas industry. With permeabilities averaging 1

mD and porosities of 8%, this sand must be stimulated by hydraulic fracturing to prove

economic. Moreover, little water is produced out of the formation (1 to 5 barrels per day). This is

not economic for electricity generation by conventional geothermal energy generation. Enhanced

geothermal systems production, such as methane generation and super-critical CO2 injection,

could prove economic, but more research must be done. Deeper potential reservoirs, such as the

Smackover and Eagle Mills formations, have been drilled within the study area, and could be

potential resources upon further investigation. Geothermal energy production for generating

electricity in South Bossier Parish, Louisiana is not economic at this time, but with further

research and new technologies could be feasible in the near future.

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