Results 111 to 120 of about 15,353,518 (320)

The damage and failure mechanism of prestatically loaded rock during medium‐strain rate cyclic impact loading

open access: yesDeep Underground Science and Engineering, EarlyView.
Based on experimental results and theoretical analysis, an established rock damage accumulation model that comprehensively considers the preapplied static load, impact peak value, impact frequency, and impact times. Abstract To study the rock damage mechanism under high static loading and superimposed medium strain rate cyclic impact loading, a series ...
Wei Wang   +6 more
wiley   +1 more source

Effect of non-condensable gases on the flow of water and steam in geothermal wells [PDF]

open access: yesGeofísica Internacional, 2002
This paper describes a study on the effects of non-condensable gases (IG) represented by carbon dioxide, on the numerically simulated flow characteristics of water and steam in geothermal wells.
Rosa Ma. Barragán   +2 more
doaj  

Geothermal systems simulation: A case study [PDF]

open access: yes, 2015
Geothermal reservoir simulation is a key step for developing sustainable and efficient strategies for the exploitation of geothermal resources. It is applied in the assessment of several areas of reservoir engineering, such as reservoir performance and ...
Guerrero-Martinez, Fernando J.   +3 more
core  

Coupling of energy conversion systems and wellbore heat exchanger in a very deep oil well [PDF]

open access: yes, 2016
The conventional geothermal power plants use the reinjection wells mostly to avoid the depletion of the geothermal reservoir gathering in the underground of the produced brine.
Alimonti, Claudio   +3 more
core   +1 more source

Exploring wave propagation behaviors in rock: A grain‐based perspective on mineral structures

open access: yesDeep Underground Science and Engineering, EarlyView.
This study investigates wave propagation in rock at the grain scale using a grain‐based model, revealing that mineral elastic modulus significantly influences wave attenuation while grain size and distribution have limited effects. A novel peak particle velocity attenuation prediction model is proposed and validated for grain‐scale wave propagation ...
Zhiyi Liao   +3 more
wiley   +1 more source

Caving‐enhanced geothermal system overwhelms fracturing‐ and pipe‐enhanced geothermal system in heat extraction

open access: yesDeep Underground Science and Engineering, EarlyView.
Our study reveals that caving‐enhanced geothermal systems (C‐EGS) with adequately fractured reservoirs achieve optimal heat extraction by minimizing preferential flow paths, while conventional fracturing (F‐EGS) and pipe‐based (P‐EGS) systems suffer accelerated thermal drawdown.
Fangchao Kang   +4 more
wiley   +1 more source

Tracer Applications of Noble Gas Radionuclides in the Geosciences

open access: yes, 2013
The noble gas radionuclides, including 81Kr (half-life = 229,000 yr), 85Kr (11 yr), and 39Ar (269 yr), possess nearly ideal chemical and physical properties for studies of earth and environmental processes.
Fischer, T. P.   +10 more
core   +3 more sources

Improved geothermal well logging tools [PDF]

open access: yes, 1977
A geothermal well logging tool has been designed to operate at 275/sup 0/C and 7000 psi. The logging tool will initially consist of a manometer, a gradiomanometer and a thermometer; the electrical and mechanical design is such that a flowmeter and a caliper can be added as a later development. A unique feature of the logging tool is that it contains no
openaire   +2 more sources

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