Search

Search Results

• 11. [Image] Hydrothermal Alteration in Well Baca 22, Baca Geothermal Area, Valles Caldera, New Mexico

  	The Baca geothermal area is located in the Valles caldera in the Jemez Mountains of north-central New Mexico. Union Geothermal Company drilled a number of exploration wells to supply steam for a proposed ...
  	Citation × Citation Citation Abstract Copy Title: Hydrothermal Alteration in Well Baca 22, Baca Geothermal Area, Valles Caldera, New Mexico Author: Fox, D. J. Year: 1984 The Baca geothermal area is located in the Valles caldera in the Jemez Mountains of north-central New Mexico. Union Geothermal Company drilled a number of exploration wells to supply steam for a proposed electric generating plant. Drill cuttings from one of these wells, Baca 22 (see Figure 1), were studied with a petrographic microscope and by x-ray diffraction to determine the nature of the original rocks and of the hydrothermal alteration. The hydrothermal alteration will be used to determine the temperatures of alteration which can then be compared with borehole temperatures to determine if the mineral assemblages are compatible with present day temperatures. It will be shown that there is evidence indicating that the upper 2000 feet of borehole is cooler now than it has been in the past Title: Hydrothermal Alteration in Well Baca 22, Baca Geothermal Area, Valles Caldera, New Mexico Author: Fox, D. J. Year: 1984 The Baca geothermal area is located in the Valles caldera in the Jemez Mountains of north-central New Mexico. Union Geothermal Company drilled a number of exploration wells to supply steam for a proposed electric generating plant. Drill cuttings from one of these wells, Baca 22 (see Figure 1), were studied with a petrographic microscope and by x-ray diffraction to determine the nature of the original rocks and of the hydrothermal alteration. The hydrothermal alteration will be used to determine the temperatures of alteration which can then be compared with borehole temperatures to determine if the mineral assemblages are compatible with present day temperatures. It will be shown that there is evidence indicating that the upper 2000 feet of borehole is cooler now than it has been in the past Close

• 12. [Image] Geothermal Investigations in Idaho. Part 8. Heat Flow Study of the Snake River Plain Region, Idaho

  	The Snake River Plain of Idaho has recent lava flows and a large number of thermal springs and wells. A heat flow study was initiated which, together with available geological and geophysical information, ...
  	Citation × Citation Citation Abstract Copy Title: Geothermal Investigations in Idaho. Part 8. Heat Flow Study of the Snake River Plain Region, Idaho Author: Brott, C.A. Year: 1976 The Snake River Plain of Idaho has recent lava flows and a large number of thermal springs and wells. A heat flow study was initiated which, together with available geological and geophysical information, allows a better definition of the geothermal resource and evaluation of the geothermal potential. Local geothermal anomalies were not the objects of this study and have not been studied in detail. The quality of the heat flow values obtained varies as interpretation was necessary to determine geothermal gradients for many of the holes which had disturbances. A major problem in determining the heat flow values is the lack of knowledge of the in situ porosity of the rocks. The heat flow values obtained for the Eastern Snake River Plain are from shallow wells (< 200 m), hence the heat flow there is low (< 0.5 HFU) because of the water movement in the Snake Plain aquifer. The anomalous regional heat flow pattern around the Snake River Plain, together with other geophysical and geological data, suggest the presence of a major crustal heat source. With the exception of the area of the Snake Plain aquifer, high geothermal gradients were found in all areas of southern Idaho (40 to 100/sup 0/C/km). Temperatures hot enough for space heating can be found most anywhere in the Plain at relatively shallow depths (1 to 2 km). Temperatures hot enough for electrical power generation (200/sup 0/C) can be found beneath southern Idaho almost anywhere at depths of 3 to 4 kilometers. The Plain is fault bounded and hot water circulating along the fault zones from depths can be a very important geothermal resource at shallow depths. The margins of the Plain have the highest heat flow values, are the most faulted, and have possibly the highest geothermal resource potential Title: Geothermal Investigations in Idaho. Part 8. Heat Flow Study of the Snake River Plain Region, Idaho Author: Brott, C.A. Year: 1976 The Snake River Plain of Idaho has recent lava flows and a large number of thermal springs and wells. A heat flow study was initiated which, together with available geological and geophysical information, allows a better definition of the geothermal resource and evaluation of the geothermal potential. Local geothermal anomalies were not the objects of this study and have not been studied in detail. The quality of the heat flow values obtained varies as interpretation was necessary to determine geothermal gradients for many of the holes which had disturbances. A major problem in determining the heat flow values is the lack of knowledge of the in situ porosity of the rocks. The heat flow values obtained for the Eastern Snake River Plain are from shallow wells (< 200 m), hence the heat flow there is low (< 0.5 HFU) because of the water movement in the Snake Plain aquifer. The anomalous regional heat flow pattern around the Snake River Plain, together with other geophysical and geological data, suggest the presence of a major crustal heat source. With the exception of the area of the Snake Plain aquifer, high geothermal gradients were found in all areas of southern Idaho (40 to 100/sup 0/C/km). Temperatures hot enough for space heating can be found most anywhere in the Plain at relatively shallow depths (1 to 2 km). Temperatures hot enough for electrical power generation (200/sup 0/C) can be found beneath southern Idaho almost anywhere at depths of 3 to 4 kilometers. The Plain is fault bounded and hot water circulating along the fault zones from depths can be a very important geothermal resource at shallow depths. The margins of the Plain have the highest heat flow values, are the most faulted, and have possibly the highest geothermal resource potential Close

• 13. [Image] Geologic Characteristics of a Portion of the Salton Sea Geothermal Field

  	The examination of drill cuttings and core samples from the Magmamax Nos. 2 and 3 and Woolsey No. 1 wells indicate that the sequence of sedimentary rocks in the Salton Sea geothermal field from the surface ...
  	Citation × Citation Citation Abstract Copy Title: Geologic Characteristics of a Portion of the Salton Sea Geothermal Field Author: Tewhey; J.D. Year: 1977 The examination of drill cuttings and core samples from the Magmamax Nos. 2 and 3 and Woolsey No. 1 wells indicate that the sequence of sedimentary rocks in the Salton Sea geothermal field from the surface to below 4000 ft can be divided into three categories Title: Geologic Characteristics of a Portion of the Salton Sea Geothermal Field Author: Tewhey; J.D. Year: 1977 The examination of drill cuttings and core samples from the Magmamax Nos. 2 and 3 and Woolsey No. 1 wells indicate that the sequence of sedimentary rocks in the Salton Sea geothermal field from the surface to below 4000 ft can be divided into three categories Close

• 14. [Image] Drilling, Completion, and Testing of Geothermal Wells CD-1 and CD-2 Caliente, Nevada

  	The City of Caliente's interest in geothermal energy has grown from a perfunctory acknowledgement of the resources existence in the City's boundaries to a resounding affirmation of the City's need to utilize ...
  	Citation × Citation Citation Abstract Copy Title: Drilling, Completion, and Testing of Geothermal Wells CD-1 and CD-2 Caliente, Nevada Author: Flynn, T. Year: 1983 The City of Caliente's interest in geothermal energy has grown from a perfunctory acknowledgement of the resources existence in the City's boundaries to a resounding affirmation of the City's need to utilize the resource to its fullest potential. This ongoing metamorphosis of thought and opinion is largely due to the contributions of people and events in harmony with this beneficial natural resource Title: Drilling, Completion, and Testing of Geothermal Wells CD-1 and CD-2 Caliente, Nevada Author: Flynn, T. Year: 1983 The City of Caliente's interest in geothermal energy has grown from a perfunctory acknowledgement of the resources existence in the City's boundaries to a resounding affirmation of the City's need to utilize the resource to its fullest potential. This ongoing metamorphosis of thought and opinion is largely due to the contributions of people and events in harmony with this beneficial natural resource Close

• 15. [Image] Drilling plan: Raft River Geothermal Exploratory Hole No. 3

  	The program, plans, and procedures to be used in drilling and completion of the Raft River Geothermal Exploratory Hole No. 3(RRGE-3) are described. RRGE-3 will be located in the Raft River valley of south ...
  	Citation × Citation Citation Abstract Copy Title: Drilling plan: Raft River Geothermal Exploratory Hole No. 3 Author: Industrial Applications Division , Nevada Operations Office Year: 1976 The program, plans, and procedures to be used in drilling and completion of the Raft River Geothermal Exploratory Hole No. 3(RRGE-3) are described. RRGE-3 will be located in the Raft River valley of south central Idaho, southeast of Burley, and approximately 16 miles south of Malta, Idaho. The third exploratory hole will be drilled to provide data to further investigate and evaluate the geothermal reservoir, as well as to optimize the location of possible future resource and/or injection wells, and to develop methods to reduce the cost of geothermal wells. Plans call for drilling to a total depth of approximately 6,000 ft., or to the depth at which it is either indicated from temperature and test flow data and from logs that an acceptable hot water resource is available or that the hole is accepted as a possible reinjection well. (LBS) Title: Drilling plan: Raft River Geothermal Exploratory Hole No. 3 Author: Industrial Applications Division , Nevada Operations Office Year: 1976 The program, plans, and procedures to be used in drilling and completion of the Raft River Geothermal Exploratory Hole No. 3(RRGE-3) are described. RRGE-3 will be located in the Raft River valley of south central Idaho, southeast of Burley, and approximately 16 miles south of Malta, Idaho. The third exploratory hole will be drilled to provide data to further investigate and evaluate the geothermal reservoir, as well as to optimize the location of possible future resource and/or injection wells, and to develop methods to reduce the cost of geothermal wells. Plans call for drilling to a total depth of approximately 6,000 ft., or to the depth at which it is either indicated from temperature and test flow data and from logs that an acceptable hot water resource is available or that the hole is accepted as a possible reinjection well. (LBS) Close

• 16. [Image] Planning, Drilling, Logging, and Testing of Energy Extraction Hole EE-1, Phases I and II

  	Energy Extraction Hole No. 1 (EE-1) is the second deep hole drilled into the Precambrian-age granitic rocks of the Jemez Mountains of north-central New Mexico. EE-1 was drilled to intersect a hydraulic ...
  	Citation × Citation Citation Abstract Copy Title: Planning, Drilling, Logging, and Testing of Energy Extraction Hole EE-1, Phases I and II Author: Pettitt, R.A. Year: 1977 Energy Extraction Hole No. 1 (EE-1) is the second deep hole drilled into the Precambrian-age granitic rocks of the Jemez Mountains of north-central New Mexico. EE-1 was drilled to intersect a hydraulic fracture extending outward from near the bottom of previously drilled hole GT-2, thus completing the underground circulation loop required for the hot dry rock geothermal energy extraction experiment. Directional drilling techniques were used to intersect the fracture zone. In addition, high-temperature instrumentation and equipment development, hydraulic fracturing experiments, pressure-flow testing of the fracture systems, and fracture mapping and borehole-ranging technique activities were conducted. The drilling, logging, and testing operations in EE-1 are described Title: Planning, Drilling, Logging, and Testing of Energy Extraction Hole EE-1, Phases I and II Author: Pettitt, R.A. Year: 1977 Energy Extraction Hole No. 1 (EE-1) is the second deep hole drilled into the Precambrian-age granitic rocks of the Jemez Mountains of north-central New Mexico. EE-1 was drilled to intersect a hydraulic fracture extending outward from near the bottom of previously drilled hole GT-2, thus completing the underground circulation loop required for the hot dry rock geothermal energy extraction experiment. Directional drilling techniques were used to intersect the fracture zone. In addition, high-temperature instrumentation and equipment development, hydraulic fracturing experiments, pressure-flow testing of the fracture systems, and fracture mapping and borehole-ranging technique activities were conducted. The drilling, logging, and testing operations in EE-1 are described Close