Poro-thermoelastic borehole stress analysis for determination of the in situ stress and rock strength

Geothermics ◽  
2010 ◽  
Vol 39 (3) ◽  
pp. 250-259 ◽  
Author(s):  
Qingfeng Tao ◽  
Ahmad Ghassemi
Keyword(s):  
Stress Analysis ◽  
Rock Strength ◽  
In Situ Stress

Determination of in‐situ stress and rock strength using borehole acoustic data

2009 ◽  
Author(s):  
Colin M. Sayers ◽  
Zsolt Nagy ◽  
José Adachi ◽  
Vasudev Singh ◽  
Kwasi Tagbor ◽  
...  
Keyword(s):  
Rock Strength ◽  
In Situ Stress ◽  
Acoustic Data

The Application of Hydraulic Fracturing in Storage Projects of Liquefied Petroleum Gas

2006 ◽  
Vol 306-308 ◽  
pp. 1509-1514 ◽  
Author(s):  
Jing Feng ◽  
Qian Sheng ◽  
Chao Wen Luo ◽  
Jing Zeng
Keyword(s):  
Rock Mass ◽  
Hydraulic Fracturing ◽  
Stress Measurement ◽  
Test Procedure ◽  
In Situ Stress ◽  
Test System ◽  
Petroleum Engineering ◽  
Liquefied Petroleum Gas

It is very important to study the pristine stress field in Civil, Mining, Petroleum engineering as well as in Geology, Geophysics, and Seismology. There are various methods of determination of in-situ stress in rock mass. However, hydraulic fracturing techniques is the most convenient method to determine and interpret the test results. Based on an hydraulic fracturing stress measurement campaign at an underground liquefied petroleum gas storage project which locates in ZhuHai, China, this paper briefly describes the various uses of stress measurement, details of hydraulic fracturing test system, test procedure adopted and the concept of hydraulic fracturing in arriving at the in-situ stresses of the rock mass.

Rock Overstressing in Deep Tunnel Excavation of Pahang-Selangor Raw Water Transfer Project

2015 ◽  
Vol 802 ◽  
pp. 16-21 ◽  
Author(s):  
Romziah Azit ◽  
Mohd Ashraf Mohamad Ismail ◽  
Sharifah Farah Fariza Syed Zainal ◽  
Norzani Mahmood
Keyword(s):  
Rock Strength ◽  
Stress Measurement ◽  
In Situ Stress ◽  
Water Transfer ◽  
Stress Factors ◽  
Raw Water ◽  
Tunnel Excavation ◽  
In Situ Stress Measurement ◽  
Assessment Approach

Tunneling under high overburden and in-situ stress may cause tunnel instability because of rock overstressing. Evaluating overstressing in deep hard rocks is crucial to minimize excavation risks. The excavation of the Pahang-Selangor Raw Water Transfer Tunnel is evaluated in this study. A potential overstressing problem is expected at a tunnel depth more than 500 m. Therefore, the possibility of rock overstressing is assessed based on the evaluations of in-situ stress measurement, rock strength, and actual observations during the tunnel excavation. An analytical method is used to analyze the behavior of the tunnel under high overburden stress based on rock strength and tangential stress factors. The empirical assessment approach to the observation of actual overstressing appeared to be valid for the prediction of overstressing. These approaches facilitate the reasonable prediction of tunnel behavior under different rock conditions, support systems, and overburden stresses, which serve as useful tools in the observational design and construction method of long and deep tunnels.

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