Results 141 to 150 of about 1,645,202 (341)

Shale Kerogen: Hydraulic Fracturing Fluid Interactions and Contaminant Release

open access: yes, 2018
The recent increase in unconventional oil and gas exploration and production has prompted a large amount of research on hydraulic fracturing, but the majority of chemical reactions between shale minerals and organic matter with fracturing fluids are not ...
Dustin, Megan K.   +23 more
core   +1 more source

Permeability of granite from a shallow buried mountain pipe gallery tunnel under unloading confining pressure

open access: yesDeep Underground Science and Engineering, EarlyView.
Triaxial compression tests under unloading confining pressure conditions were conducted to systematically analyze the permeability behavior of granite retrieved from the different classification surrounding rocks. Abstract The rock mass within mountain tunnels undergoes complex changes in permeability, strength, and deformation during tunneling ...
Xiaoyan Zhang   +4 more
wiley   +1 more source

Hydraulic Fracturing in Porous and Fractured Rocks

open access: yes, 2022
There are various methods to determine in situ stress parameters, each having its own advantages and limitations. Among the methods available, the hydraulic fracturing method is the most adopted method for in situ stress measurements because of its simplicity and reliability.
openaire   +1 more source

Hydraulic fracturing and shale gas extraction

open access: yes
Master of ScienceDepartment of Chemical EngineeringJames H. EdgarIn the past decade the technique of horizontal drilling and hydraulic fracturing has been improved so much that it has become a cost effective method to extract natural gas from shale ...
Klein, Michael
core  

Alternatives to Hydraulic Fracturing [PDF]

open access: yes, 2015
Hydraulic fracturing is a common stimulation technique which is widely used especially in a North America. It has several positive impacts on economy and energy.
SHABERDI, KOSHEKOV
core  

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

Critical expansion points: Mechanical signs of surrounding rock instability

open access: yesDeep Underground Science and Engineering, EarlyView.
This study proposes the Rock Bearing‐Expansion Model (RockBEM) with critical expansion points (CEPs) to quantify post‐peak damage stages in deep‐buried rock masses via plane strain compression test (PSCT). CEP hysteresis&interval ratios reveal bearing performance dynamics and failure severity, advancing mechanistic insights into deep underground rock ...
Jiaqi Wen   +4 more
wiley   +1 more source

Hydraulic fracture optimization using hydraulic fracture and reservoir modeling in the Piceance Basin, Colorado

open access: yes, 2012
textHydraulic fracturing is an important stimulation method for producing unconventional gas reserves. Natural fractures are present in many low-permeability gas environments and often provide important production pathways for natural gas. The production
Reynolds, Harris Allen
core  

An optimizing microseismic method for rock burst early warning based on mining production process

open access: yesDeep Underground Science and Engineering, EarlyView.
A classification early warning method of rock burst based on hourly microseismic data is proposed, which can be combined with the on‐site production process to provide more timely warning. Abstract Microseismic (MS) events have been reported in nearly every coal mining country, which could well lead to rock burst in underground coal mines.
Zepeng Han   +6 more
wiley   +1 more source

Determination of the state of stress at the Stripa Mine, Sweden

open access: yes, 1982
The state of stress at the Stripa Mine has been measured both in a 381-m-deep hole drilled from the surface and in holes drilled from the drifts underground.
Hustrulid, W.A.,   +4 more
core  

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