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6 results for “Deep Boreholes”
Calibration of a movable heat pulse probe in borehole for measuring horizontal groundwater flow velocity in deep aquifers
<ol> <li>The first file is the flow profile data calculated by analytical solution in the steady-state flow. The calculation region is 30cm×30cm.</li> <li>The secend file is the temperature response data calculated by finite difference method. The simulated temperature response data corresponding to all heat pulse experiments are calculated and listed here.</li> </ol>
Calibration of a movable heat pulse probe in borehole for measuring horizontal groundwater flow velocity in deep aquifers
<ul> <li>In the laboratory, 42 heat pulse experiments with 7 different Darcy’s velocities and 6 different heating powers had been done. The results are summarized in a relationship of temperature increase with time.</li> <li>The temperature responses were continuously monitored over a 30min period. Data were collected every 2s throughout the recording period. In order to strictly monitor the actual power to the heater, the voltage and current delivered to the heater were also recorded simultaneously with the temperature.</li> <li>The heater was switched on and lasted for 1 min to generate a heat pulse. The time when the heater was switched on was selected as the initial time of data analysis.</li> </ul>
Borehole temperatures in deep wells of Western Siberia, Russia, 1960-1995, Version 1
This data set is a database of the permafrost and geothermal conditions of the oil and gas deposits of Western Siberia. Data were taken from 736 plots, each having from one to ten wells. The data set includes soil and rock temperatures at 20, 50, 100, 200, 300, 400, 500, 1000, and 3000 meters; depth of the bedding of the top and bottom of permafrost layers; size of the thermal flows in the subpermafrost; and thickness of frozen layers and underlying thawed layers. Additional information includes the geographical coordinates of the sites, the air temperature, permafrost-geothermal geological sections, maps of thermal flows, and the distribution of the temperatures at each depth (down to 5000 meters). The data are presented on the CAPS Version 1.0 CD-ROM, June 1998.
Permafrost Temperature Data from a Deep Borehole Array on the Arctic Slope of Alaska, 1973 - 2014, Version 1
These data consist of fully processed permafrost temperature data from borehole logs acquired by the U.S. Geological Survey (USGS) from the 24-element US Department of the Interior (DOI) Global Terrestrial Network for Permafrost (GTN-P) Deep Borehole Array in arctic Alaska beginning in 1973 and ending in 2014. The data represent the true temperatures in the wellbores and surrounding rocks at the time of the measurements.
Ground Temperatures from Deep Boreholes in the Ob River Valley, Russia (VK-1615 and ZS-124/124a), Version 1
This data set contains soil temperature data from three deep boreholes in the Ob River valley in Russia. Boreholes were drilled in 1967 (VK-1615), 1977 (ZS-124), and 1980 (ZS-124a) in discontinuous permafrost of approximately 70 m depth. Borehole VK-1615 was sampled to a depth of 100 m between 1971 and 2002, ZS-124 was sampled monthly to a depth of 13 m between 1978 and 1980, and ZS-124a was sampled monthly to a depth of 33.7 m between 1980 and 2002.
Datasets of in situ stress and fracture information of four deep scientific boreholes
<p>The data sets contain four MS Excel files with the in situ stress and fracture information from four deep scientific boreholes (Cajon Pass, Long Valley, Nevada Test Site (NTS), and German Continental Deep Drilling Program (KTB)). The raw data sets were originally provided by Prof. Mark Zoback at Stanford University, which are listed here to support 'Determination of the Crustal Friction and State of Stress in Deep Boreholes using Hydrologic Indicators' by S Zhang, X Ma, and M Zoback.</p> <p>In each Excel file, gradients of the three principal stresses (<em>S</em><sub>V</sub>, <em>S</em><sub>H</sub>, <em>S</em><sub>h</sub>) and pore pressure are provided (unit: MPa / m), where is <em>S</em><sub>V</sub> the (vertical) overburden stress, <em>S</em><sub>H</sub> is the maximum horizontal stress, and <em>S</em><sub>h</sub> is the minimum horizontal stress. The orientation (theta, measured from North) of <em>S</em><sub>H</sub> is also given so that the in situ stress tensor is available for each borehole (interval).</p> <p>Fractures identified by acoustic televiewer (ATV) logs are listed with their depth, dip direction (from North), dip (from horizontal plane), and hydraulic conductivity. Based on the stress gradients, the shear and normal stresses of each fracture are also calculated and presented in each file. In particular, the hydraulic conductivity of each fracture is indexed by '0' (non-conductive/impermeable) or '1' (conductive/permeable), which was previously determined by temperature logs (Barton et al., 1995, Geology; Ito and Zoback, 2000, GRL).</p> <p>Citation:</p> <p> "Zhang, S., Ma, X., & Zoback, M. (2022). Datasets of in situ stress and fracture information of four deep scientific boreholes [Dataset]. Zenodo. https://doi.org/10.5281/zenodo.6585196"</p>
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