Geothermal investigations in Idaho. Part 8. Heat flow study of the Snake River Plain region, Idaho

Brott, Charles A.; Blackwell, David; Mitchell, John C.

doi:10.2172/7300489

Cited by 11 publications

(3 citation statements)

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“…The Eastern Snake River Plain (ESRP) aquifer is a productive volcanic aquifer flowing generally from east to west, from near the Yellowstone Plateau to near Thousand Springs, Idaho, where much of the groundwater flow exits the system and the remaining groundwater continues to flow along the Snake River Plain [ Brott et al ., ; Idaho Department of Water Resources , ]. While the ESRP aquifer is locally variably confined along its length, the highly heterogeneous stratigraphy and structure generally results in unconfined conditions, well‐connected to shallower geologic units.…”

Section: Example: Eastern Snake River Plain Regional Aquifer Systemmentioning

confidence: 99%

“…The 1‐D solution is applied piece‐wise to the Eastern Snake River Plain (ESRP) regional aquifer to demonstrate the method. Geothermal heat flow through the ESRP is significantly perturbed by flow through the regional aquifer system [ Brott et al ., ] but, unlike the examples considered by Manga and Kirchner [], heat conduction to the land surface is a significant part of the heat flow budget. We do not assert that the 1‐D solution is sufficient to capture all of the complex 3‐D interactions between groundwater and heat flow within the ESRP, but we do demonstrate that the method can efficiently identify the important physical processes within the ESRP aquifer, giving the practitioner a powerful tool to make estimates, assess which parameters are most sensitive (allowing improved experimental design), and help select more complex 2‐D and 3‐D tools for subsequent analyses.…”

Section: Introductionmentioning

confidence: 99%

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Evaluating geothermal and hydrogeologic controls on regional groundwater temperature distribution

Burns¹,

Ingebritsen²,

Manga

et al. 2016

Water Resources Research

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A one-dimensional (1-D) analytic solution is developed for heat transport through an aquifer system where the vertical temperature profile in the aquifer is nearly uniform. The general anisotropic form of the viscous heat generation term is developed for use in groundwater flow simulations. The 1-D solution is extended to more complex geometries by solving the equation for piece-wise linear or uniform properties and boundary conditions. A moderately complex example, the Eastern Snake River Plain (ESRP), is analyzed to demonstrate the use of the analytic solution for identifying important physical processes. For example, it is shown that viscous heating is variably important and that heat conduction to the land surface is a primary control on the distribution of aquifer and spring temperatures. Use of published values for all aquifer and thermal properties results in a reasonable match between simulated and measured groundwater temperatures over most of the 300 km length of the ESRP, except for geothermal heat flow into the base of the aquifer within 20 km of the Yellowstone hotspot. Previous basal heat flow measurements ($110 mW/m 2 ) made beneath the ESRP aquifer were collected at distances of >50 km from the Yellowstone Plateau, but a higher basal heat flow of 150 mW/m 2 is required to match groundwater temperatures near the Plateau. The ESRP example demonstrates how the new tool can be used during preliminary analysis of a groundwater system, allowing efficient identification of the important physical processes that must be represented during morecomplex 2-D and 3-D simulations of combined groundwater and heat flow.

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Section: Example: Eastern Snake River Plain Regional Aquifer Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluating geothermal and hydrogeologic controls on regional groundwater temperature distribution

Burns¹,

Ingebritsen²,

Manga

et al. 2016

Water Resources Research

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“…Lokasi penelitian berada di Camas Prairie, Idaho, yang merupakan wilayah di bagian barat Sungai Snake dengan aliran panas tinggi yang terkait dengan jalur hotspot Yellowstone (Shervais dkk., 2016), di mana daerah ini terdapat gradien panas bumi dengan suhu tinggi yaitu memperoleh 72 0 C/km. Gradien ini jauh lebih tinggi daripada gradien panas bumi normal yaitu 33 0 C/km (Brott & Mitchell, 1976). Daerah Camas Prairie merupakan wilayah dengan potensi sumber daya komersial (misalnya, mampu mendukung pembangkit tenaga listrik 10 MW atau lebih) berdasarkan perkiraan panasnya, permeabilitas, dan keberadaan tudung (cap) sedimen yang mengisi cekungan.…”

Section: Pendahuluanunclassified

Analisis Data Magnetotellurik Menggunakan Tensor Fase Dan Pemodelan 2d Bawah Permukaan (Studi Kasus Camas Prairie, Idaho, Amerika Serikat)

Maharani,

Paembonan,

Irawati

2023

jurgeo

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Metode geofisika yang umum diaplikasikan dalam eksplorasi geotermal adalah metode Magnetotelurik (MT), yang memanfaatkan gelombang elektromagnetik alami. Pada pengukuran metode Magnetotelurik sering menghasilkan data lapangan yang terpengaruh oleh gangguan atau distorsi, yang dapat mengurangi keakuratan hasil interpretasi struktur di bawah permukaan. Oleh karena itu, untuk mendapatkan hasil yang akurat, diperlukan analisis seperti tensor fase guna mengidentifikasi struktur bawah permukaan yang tidak terpengaruh oleh distorsi galvanik. Hasil analisis di daerah penelitian menunjukkan dominasi dimensionalitas 2D yang mengarah ke Barat Laut-Tenggara dengan arah strike N1050E. Model inversi 2D mengungkapkan adanya lapisan resistivitas rendah (1-10 Ωm), yang diduga merupakan zona alterasi yang menjadi batuan penudung. Terdapat juga lapisan dengan nilai resistivitas 10-25 Ωm diduga sebagai lempung pasiran (Sandy Clay), dan nilai resistivitas 25-50 Ωm merepresentasikan lapisan pasir. Pada resistivitas 50-70 Ωm, diduga sebagai basal, sementara pada resistivitas tinggi (200-1000 Ωm) diduga sebagai granit yang berperan sebagai reservoir dengan tipe hot dry rock di dasar intrusif magma. Terlihat adanya struktur sesar dextral-normal Pothole sebagai daerah pelepasan di manifestasi air panas Barron.

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Exploration of Geothermal Resources Utilizing Geophysical and Borehole Data in the Abu Gharadig Basin of Egypt’s Northern Western Desert

Elmasry

Zaher²,

Madani³

et al. 2022

Pure Appl. Geophys.

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The Abu Gharadig Basin is regarded as one of the most essential in Egypt, serving as the country’s second most important reservoir for hydrocarbon production. Our present study is focused on the investigation of geothermal resources in the Abu Gharadig Basin. Using airborne magnetic and gravity surveys, as well as temperature well records, we can identify possible geothermal sources in this region. Power spectral analysis was used on the airborne magnetic measurements to compute the Curie Point Depths (CPDs) and display the temperature gradients and heat flows regime in the study area, while on the gravity data, 3-D density inversion was used to identify the basement surface. Real data from bottom-hole temperature (BHT) logs and geological data (structural and stratigraphic data from prior studies) were used to cross-validate the geophysical maps and to ascertain the stratigraphy and structural setting beneath the study location. The depth of the basement rock, according to the studies, ranges from 4.5 to 7 km, and the CPDs run from 17 to 22 km. Furthermore, the estimated temperature gradients vary from 25 to 34 degrees Celsius per kilometer, whereas the heat flows vary from 52 to 86 mW/m2. Generally, there is a correlation between shallow curie depths, uplifts on basement rocks, and sites of high heat flow, indicating that basement rocks are primarily accountable for the geothermal potential of the basin.

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Geothermal investigations in Idaho. Part 8. Heat flow study of the Snake River Plain region, Idaho

Cited by 11 publications

References 0 publications

Evaluating geothermal and hydrogeologic controls on regional groundwater temperature distribution

Evaluating geothermal and hydrogeologic controls on regional groundwater temperature distribution

Analisis Data Magnetotellurik Menggunakan Tensor Fase Dan Pemodelan 2d Bawah Permukaan (Studi Kasus Camas Prairie, Idaho, Amerika Serikat)

Exploration of Geothermal Resources Utilizing Geophysical and Borehole Data in the Abu Gharadig Basin of Egypt’s Northern Western Desert

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