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Keywords: fracture
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Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-006
... material that fills up the faults and hence results from the shear stress relaxation over a large number of pre-existing fractures and faults. The overall granite rock mass may be viewed as a combination of stiff elastic blocks separated by soft low strength material, leading to a fairly large scale...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-008
... that this stress is not related to tectonics but to pressure solution effects activated by pore pressure transients. These transients develop in the natural fracture system that affects limestone formations and are linked to climatic variations. They involve periods that range from thousands to hundreds...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-002
... Abstract Because hydraulic fractures (HF) are always normal to the least m1mmum principal stress, mapping the geometry of hydraulic fractures helps map the trajectory of the minimum principal stress direction. In addition, measuring the pressure for which both faces of a hydraulic fracture...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-013
... US government cavern Finland Johansson Symposium in-situ rock stress parking facility stress measurement fracture Abstract Parking facility P-Hamppi under central Tam pare has now been in use for few years. During completion, it was the first large span cavern in Tampers city centre...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-036
... the pressuremeter and hydraulic fracturing data sharing. The idea of the developed method is to use two different and independent data sets: the first one is obtained from standard deformation studies in well while the second one describes the behaviour of the same well with fracture formed in the direction...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-026
... hydraulic fracturing normal stress hydroelectric project rock mass Upstream Oil & Gas Finland Johansson proceedings fracture stress measurement principal stress Reservoir Characterization flow rate borehole Symposium Injection Rate critical pressure reservoir geomechanics...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-053
... reservoir geomechanics observation equation Finland Johansson Reservoir Characterization Upstream Oil & Gas Raasakka water management Yokoyama Rock stress in-situ rock stress shut-in pressure ps borehole high stiffness mechanism principal stress hydraulic fracturing compliance...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-058
... reservoir geomechanics edz study field Reservoir Characterization Upstream Oil & Gas complex reservoir hydraulic fracturing horizontal fracture stress interpretation excavation damage zone Rock mechanics niche fracture EDZ study area interpretation situ stress interpretation...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-029
... to the Pohang EGS research site, which is the first of its kind in Korea. The in-situ stress estimation analysis was conducted at an exploration borehole, EXP-1, which is about 1 km in depth. Three hydraulic fracturing stress measurement tests were conducted at around 700m depth. Several borehole breakouts...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-034
... Reservoir Characterization orientation diameter baby hole reservoir geomechanics drill pipe downhole tool core sample Upstream Oil & Gas borehole stress measurement in-situ stress hydraulic fracturing test interval Symposium packer deep depth SHmax deep rock stress tester...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-019
... ABSTRACT: This paper introduces one method to detect the fractures induced during the hydraulic fracturing in-situ stress measurement process. This method can detect the hydraulic fracture fairly well, and can define the strike of induced fractures exactly so as to determine the orientation...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-069
...Rock Stress and Earthquakes Xie (ed.) © 2010 Taylor & Francis Group, London, ISBN 978-0-415-60165-8 A pseudo-3D model with 2D flow of hydraulic fracture propagation in thin interbedded sandstone reservoir Yang Xiujuan, Wang Tongtao & Yan Xiangzhen College of Storage & Transportation...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-010
... ABSTRACT: Hydraulic Fracturing, Hydraulic Tests on Pre-existing Fractures, sleeve reopening tests and the analysis of en echelon fractures developed in wells inclined to the principal stress directions, have helped determine the vertical profile of the complete stress tensor in a sedimentary...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-016
... of preexisting fracture (HTPF) has similarity with hydrofracturing test but they are different. The hydrofracturing test (HF) is done in rock mass without discontinuity but HTPF is done in more discontinuity rock mass. In HF test direction of minimum stress can be measured by impression packer. HTPF and HFwere...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-011
... ABSTRACT: Stress measurements were undertaken in a significantly inclined borehole (denominated OL-KR40) at the Olkiluoto site, Finland, resulting in en echelon fracturing of the borehole wall. The failure to successfully stimulate pre-existing fractures using the HTPF-technique, which...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-006
... ABSTRACT: For the effective measurement of the reopening pressure in hydraulic fracturing, it is necessary to use the testing equipment with sufficiently small compliance. If not, there is no way to estimate the maximum stress in a plane perpendicular to a borehole, i.e. the maximum horizontal...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-026
... ABSTRACT: Hydraulic fracture in borehole is used to determine the geo-stresses. The complexity of rock property and stress state makes the great difference between the real curve and the ideal curve of water pressure time. The water pressure to crack the boreholewall may be lower than...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-042
... stress measure- ment methods, which can be classified into Hydraulic Fracturing Method, Stress Restoration Method and Stress Relief Method. At present, the Stress Relief Method is the most commonly used geostress mea- surement and develops more maturely. A thin-walled sleeve is needed to drill a core...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-012
... ABSTRACT: For the practical measurement of crustal stresses at great depths more than 1,000m from the ground surface, we have been promoting research and development of borehole-jack fracturing technique. The principle of this technique is described with the relations between jack pressure...

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