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Stress impact on rock properties

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Proceedings Papers

Paper presented at the SPE Eastern Regional Meeting, October 15–17, 2019
Paper Number: SPE-196590-MS
... spacing 450 ft. To investigate the impact of rock mechanical properties on fracture properties and stress shadowing, Poisson's ratio for the pay zone (Marcellus Shale) was varied as provided in Table 3 . Poisson's ratio is used primarily to estimate the minimum horizontal stress. The calculated...
Proceedings Papers

Paper presented at the 54th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2020
Paper Number: ARMA-2020-1441
... during the whole experiment process. The second one is assuming that the entire rock specimen is uniform. In other words, it is considered that the stress and strain in the specimen are uniformly distributed during the entire propagation process of the stress wave, and the stress and strain on the two...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1612
... and blasting. In this study, a novel Triaxial Hopkinson pressure bar was used to study the dynamic properties of rocks having a multi-axial stress state. Dynamic compression tests for sandstone are conducted over a wide range of impact velocities under different true tri-axial confined conditions. Experimental...
Proceedings Papers

Paper presented at the ARMA/DGS/SEG International Geomechanics Symposium, November 3–5, 2020
Paper Number: ARMA-IGS-20-033
... shape of oil and gas wells are usually irregular. The deformation of rock near wellbore is caused by many factors such as the properties of the rock, the in-situ stresses, and drilling parameters. In this study, we have only considered the impact of rock type, borehole geometry and in-situ stresses...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1866
... to analyze the impact of changes in pore pressure reservoir pressure were calculated. The predefined stress- through time on the in-situ effective stress and rock strain curve (yield envelope) base on the rock properties deformation. With defined mechanisms that contribute to and stress conditions were...
Proceedings Papers

Paper presented at the ISRM International Symposium - 2nd Asian Rock Mechanics Symposium, September 11–14, 2001
Paper Number: ISRM-ARMS2-2001-019
... impacting fractures. Under high loading rate the rock may stand up very high transient compressive stress and store the energy or compression deformation. which will be completely released in the unloading process. Because of the brittle fracture properties of rock, its tensile strength is only one tenth...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-0906
... that need to be carefully studied to prevent and mitigate if any need arises. Direction dependent rock properties and in situ stress magnitudes are essential parameters for multidisciplinary shale reservoir characterization and geomechanical studies and have significant impact on the design and execution...
Proceedings Papers

Paper presented at the ISRM 2nd International Conference on Rock Dynamics, May 18–19, 2016
Paper Number: ISRM-ROCDYN-2016-17
... or the compression strength, which shows the loading rate effect of the rock. Furthermore, the one dimension coupled static and dynamic tension loading testing has been carried out. It is found that with the precompression stress increase, the impact dynamic strength increases. It could reach maximum when...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1784
... strain rates (up to 250/s). The damaged rocks were subjected to multiple steps of differential stress loading and hold stages under 15 MPa confining pressure. A key observation is that higher damaged specimens showed greater axial and volumetric creep strain deformation during loading and hold stages...
Proceedings Papers

Paper presented at the ISRM 2nd International Conference on Rock Dynamics, May 18–19, 2016
Paper Number: ISRM-ROCDYN-2016-30
... ABSTRACT: Plate impact experiments have been conducted on one fine-grained metamorphic rock, Carrara marble and one coarse-grained igneous rock, South Africa Gabbro. Embedded manganin stress gauges (i.e. longitudinal and lateral gauges) are used for the measurements of shock stresses. Shear...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1684
... mechanical properties along wellbore. Then numerical simulation was performed to get equilibrated 3D stress state. Finally, one-way coupling between 3D geomechanical and dynamic simulation were performed and analyzed to understand the dynamic response of rock imposed by the CO2 injection.A key parameter...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215150
... ABSTRACT The work described in this paper focusses on identifying the impact of contact cement shape on pressure and stress distributions near the cement-grain contact. Numerical simulations were used with elastic properties of quartz and clay to identify the shape effects. The results showed...
Proceedings Papers

Paper presented at the SPE Middle East Oil & Gas Show and Conference, March 6–9, 2017
Paper Number: SPE-183806-MS
... and stimulation operation decisions.In this paper, the impact of rock lamination orientation was qualitatively and quantitatively assessed. Core analysis and tri-axial experimental study were conducted on several US shale formations including Eagle Ford, Mancos and Green River. At various stress conditions, rock...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 24–26, 2017
Paper Number: URTEC-2671454-MS
... design of mud margins, leading to higher risks of borehole tensile and shear failures. Ignoring shale anisotropy will not alter the brittleness index trend observed in the OB rock, hence will have limited impact on the perforation location selection. However, the stress contrast is overestimated when...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2020, June 14–19, 2020
Paper Number: ISRM-EUROCK-2020-058
.... The hydro-mechanical model of the storage cavern aims at considering and analysing the following effects: The distribution of pore pressure and effective stresses in the rock joints impacting the stability of rock wedges The evolution of rock joints aperture impacting the hydraulic conductivity...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-2044
... ABSTRACT: The determination of stress barriers plays a key role in the design of hydraulic fracturing and well completion strategies. Stress barriers result from the presence of local stress maxima and are often influenced by rock mechanical properties and local tectonic stresses...
Proceedings Papers

Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE Annual Technical Conference and Exhibition, September 21–23, 2021
Paper Number: SPE-206271-MS
... had an unpredicted impact on the mud weight results. In addition, relying on muti-arm caliper logs for calibration in high angele wells may not provide accurate results. No laboratory tests or data were available to understand the distribution of properties and stresses around the fault. In this model...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 22–24, 2019
Paper Number: URTEC-2019-893-MS
... Shale to an orthorhombic (OB) medium. Previous studies illustrate that treating the naturally fractured shale rock as a TI medium by ignoring the NF-induced anisotropy can cause the erroneous estimation of the geomechanical properties and in-situ stress. In this paper, the study is extended to quantify...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0182
...). However, to the best of our knowledge, no attempts have been made to utilize anisotropic moduli to evaluate layering-induced stiffness anisotropy and the effect of pre-existing fractures on these rock properties. Furthermore, previous work did not attempt to investigate the impact of stress-induced damage...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 26–28, 2021
Paper Number: URTEC-2021-5290-MS
... Abstract Theoretical models predict very high cluster effectiveness using high perforation friction drop even under very low cluster spacing, however field evidence suggest that this is rarely the case. Rock elastic properties, in-situ stress contrast, stress heterogeneity in horizontal...

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