Assessment of geothermal resources of the United States: 1978

Abstract

Mean reservoir volume in relation to mean reservoir temperature for hydrothermal convection systems identified in 1978, excluding those systems for which data are not adequate to calculate other than a standard volume of 3.3 km3-Histogram of thermal energy in undiscovered hydrothermal convection systems by reservoir temperature (2ooc classes, 90o-330oc

Estimate of Hot Dry Rock Geothermal Resource in Daqing Oilfield, Northeast China

“…If the porosity and permeability are extremely low, the heat stored in the fluid in pores is ignorable, the heat will just be stored in HDR, which can be exploited with EGS. The geothermal resource base is actually the heat content of the targeted medium calculated by Equation (6) [40,41]:…”

“…However, the production has been decreasing since 1997. The annual production declined from the peak production of 56.0 million tons in 1997 to 41.6 million tons in 2007-an average decline rate of 2.9% per year. Höök et al [10] predicted the future oil production in Daqing Oilfield will continue to decline, from 41.6 million tons in 2007 to 8.0 million tons in 2060.…”

Assessment of low-temperature geothermal resources of the United States - 1982

“…define low-temperature geothermal resources. Upper temperature limit is ~O'C, following usage of Muffler (1979); lower temperature limit is defined as 10°C above the mean annual air temperature at the surface, increasing by 25°C/km with depth. Dashed lines X-XI and Y-Y' show minimum geothermal-resource temperatures re uired for mean annual air temperaair temperatures considered in this assessment.…”

Mineral resources of the Quigg West Wilderness Study Area, Granite County, Montana

“…No hot springs, or tufa deposits of former hot springs, occur within or adjacent to the wilderness study area, and, according to the studies of Robertson and others (1976), Muffler (1979), and Sonderegger and Bergantino (1981), no known geothermal resource area (KGRA) exists within the region. The study area is near two major igneous intrusives, and concealed intrusives could lie adjacent to (or under) it.…”