... the overburden value and that of the initial horizontal stresses (e.g., Nikolinakou et al. (2012 In a typical extensional setting, this causes loading at the flank and unloading above and/or below the salt. On the other hand, stresses within long, shallow salt bodies converge to the value of the overburden...

... weight. reservoir geomechanics wellbore integrity 13th international congress porosity jebbouri wellbore stability analysis geomechanical study hozayen Reservoir Characterization Upstream Oil & Gas mud weight mechanical property Zhang Wellbore Design nawrocki horizontal stress...

... OF GEOLOGICAL AND MINING CONDITIONS ON UNDERGROUND MEASURING METHODS OF THE STRESS PATTERN IN POLISH COPPER MINES J. Butra, R. Debkowski, D. Pawelus, M. Szpak ABSTRACT Impact of horizontal stresses on stability of underground workings in mines is a very important issue in underground mining. Identification...

... position, horizontal stresses, valley sloping angle, and valley shape. Further three-dimensional analyses regarding the relationships between the major factors and valley closure subsidence are discussed in this paper. The results have significant implications with regard to both the underlying mechanisms...

... model reservoir geomechanics Reservoir Characterization horizontal stress stress PREDICTION orientation Geomechancial Reservoir Model tectonic stress prediction workflow stress field Artificial Intelligence 13th international congress modeling result rock mechanics isrm13 Magnitude case...

... rock parameters were estimated by using Roclab software. According to the stress measurements the major horizontal stress varied in the area and the results gave no clear picture on the stress field. The measurements gave values from 2.6 to 10.2 MPa for maximum horizontal stress and from 1.9 to 5.6 MPa...

... criterion parameters for different lithologies associated with the coal seam. Entry width and horizontal stress have a major influence on intersection stability. Pillar ribs across an intersection fail first and lead to progressive failure of immediate roof and floor layers. The failure of roof layers...

... stress measurements by flat jack tests and hydraulic fracturing tests. The measured vertical stress was more than the stress due to overburden of rock cover and horizontal stress was higher than the vertical stress in general. The average vertical stress as measured by hydraulic fracturing test...

... on the relationship between the reopening pressure ratio and the horizontal stress ratio at the test site. By applying this approach to the test section of the slightly open fracture, the adjusted reopening pressure and the adjusted stress are estimated. The adjusted stress has a valid level compared to the trend...

... been defined from various well data (flow logs, tempera- ture logs and UBI) (Gentier et al, 2005). Nine fault zones more or less developed have been selected (Tab. 1). The fault zones are roughly sub-vertical and four of them are sub parallel to the direction of maximum horizontal stress (see §2.3...

... compression testing machine that was modified with side frames to give minimum and maximum horizontal stress. Triaxial stress was applied to make the samples in a state similar to in situ stress because hydraulic fracturing test is usually done in situ. 1147 Figure 2. (a) The parts that make up the nozzle (b...

... of the horizontal stress changes in the monitoring station. 3 IN-SITU MEASUREMENTS AT THE STUDY SITE In the study site, a monitoring station was installed in main- gate CT-8B, 20 m inby the cross cut Tr-20. A doorstopper cell was installed in the middle of the maingate and in 4 m above the roof to measure changes...

... important roles in slope failure. Hoek & Bray's (1973) book on rock slope engineering is one of the most recognised in the field of rock slope design, andwas first published 34 years ago. metals & mining mechanism coal seam reservoir geomechanics horizontal stress slope failure...

... and Sweden by 1987. They concluded from this stress database that in the Fennoscandia shield: there is a large horizontal stress component in the uppermost 1000m of bedrock, and the maximum and minimum horizontal stresses exceed the vertical stress assuming the vertical stress is estimated from...

.... For a longwall mine it is vital to orientate the mining area optimal to the major horizontal stress component. Otherwise the confining stresses can create a bridging effect, resulting in discontinuous violent caving and rockburst from stress build-up at the face and pillars. Another effect related to the stress...

... from which K can be estimated. To account regional and local influencing factors in the far and near stress fields decision tree analysis are applied. The combined application of TSI and decision tree procedures can provide a reasonable estimation of the expected magnitude of horizontal stress...

... Characterization failure criteria failure criterion horizontal stress principal stress borehole collapse Zimmerman lower limit borehole failure criterion equation stress regime 11th Congress of the International Society for Rock Mechanics Ribeiro e Sousa, Olalla & Grossmann (eds) © 2007 Taylor...

... the determination of the stress field. A striking result is the good agreement between the re-analysed overcoring data and the existing hydraulic fracturing data. The deviations for the horizontal stresses between the re-analyzed overcoring data and the existing hydraulic fracturing data are approximately 3 MPa...

... reservoir geomechanics Downstream Oil & Gas stress component horizontal stress hydraulic fracturing sea level Rock mechanics maximum horizontal stress Oil Storage Cavern Reservoir Characterization Upstream Oil & Gas cavern underground oil storage cavern excavation hydro...

...1381 ZHOU, Y. et al. Behaviour of large-span rock tunnels and caverns under favourable horizontal stress conditions. ISRM 2003 Technology Roadmap for Rock Mechanics, South African Institute of Mining and Metallurgy, 2003. Behaviour of large-span rock tunnels and caverns under favourable...