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Keywords: fluid injection
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Proceedings Papers

Paper presented at the 57th U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2023
Paper Number: ARMA-2023-0275
... ABSTRACT Fracture caging is a proposed approach to geothermal energy extraction that involves using one injection well and multiple boundary wells for continuous fluid injection at high rates and pressures while controlling induced seismicity. To validate this concept, a solid block...
Proceedings Papers

Paper presented at the 57th U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2023
Paper Number: ARMA-2023-0638
... slip associated with fluid injection, we extend a spring-slider system with a rate-and-state dependent friction law by incorporating the evolving fluid pressure and poroelastic stress. Simulations of continuous constant fluid mass injection rate scenarios using the developed model suggest...
Proceedings Papers

Paper presented at the 57th U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2023
Paper Number: ARMA-2023-0882
... and timing of fluid injection is important for the effectiveness of refracturing. To properly predict the geometries of re-fractured hydraulic fracture, it is necessary to consider both the stresses and pore pressure changes before refracturing. For Changqing oil field, both new and existing fractures...
Proceedings Papers

Paper presented at the 57th U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2023
Paper Number: ARMA-2023-0937
..., in formations that combine high Young Modulus and high reduction in temperature during injection. This article will also present a few analyses using CFD simulation and an analytical simplified solution of the cooling effect of the reservoir during fluid injection. This will give sensibility of the orders...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1955
... ABSTRACT: Understanding the physical mechanisms controlling fluid-injection-induced seismicity in a gouge-filled fault is crucial in the assessment and mitigation of induced seismicity, especially in the context of subsurface technologies like wastewater disposal, hydraulic fracturing, oil...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1912
... displacement and fractures, but flow is closely linked to the volumetric subsequent fluid injection through Opalinus behavior of the rock when exposed to fluids and its claystone using X-ray computed tomography (XCT) ability to self-seal when fractures are present (e.g., to spatially map the temporal evolution...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1270
... Abstract We address the coupled hydro-mechanical problem of fluid injection in a fractured rock mass in the limit of negligible matrix hydraulic diffusivity. The fact that fuid-induced aseismic slip may outpace pore-fluid diffusion along a planar fault is also valid in the case of fluid...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1065
..., is applied to a physically similar case of fault gouge instability caused by fluid injection. 1. Introduction Landslides and faults instabilities pose a significant environmental hazard. Most landslides and tectonic faults shear within a shear zone or gouge, which consists of clay and granular material...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1339
... ABSTRACT: Seismic response to fluid injection at the Húsmúli area within the Hellisheiði geothermal field in Iceland was investigated by correlating induced seismicity with fault structures and fluid injection rates. Induced seismicity recorded around five injection wells over a half-year...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1690
... with an impermeable core but with a high-permeable damage zone, the injection fluid penetrates the deep basement and causes pore pressure elevation. Although this pore pressure elevation increases the total stress, the CFS increases in response to a decrease in Terzaghi effective stress. Fluid injection...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0481
... needed to reach complete damage. Transient fault slip is captured by the progressive damage initiation and propagation in joint elements. This study expects to provide insights into the correlation between fluid injection and fault instabilities and contribute to the optimized design of injection...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1557
... ABSTRACT: Near-realtime seismic monitoring of fluid injection allowed control of induced earthquakes during the stimulation of a geothermal well near Helsinki, Finland. The injection well was drilled down to 6.1 km-depth into Precambrian crystalline rocks. The well was deviated 45° from...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1563
... of HFs is critically important for the design of hydraulic fracturing treatment. Normally, HFs tend to take a straight path in a symmetrical stress field. However, as a result of fluid injection or production through pre-existing wells, non-uniform stress field can be encountered during the fracturing...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1700
... ABSTRACT: Shear slip of fractures/faults induced by pressurized fluid injection has been recognized as an important mechanism in reservoir stimulation and induced earthquake. A lab-scale physical simulation of fluid injection-induced shearing is still lacking to understand the slip evolution...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1848
... deformation as well as the evolution of effectives stress at the fault plane. Reservoir Characterization Upstream Oil & Gas fluid injection simulator Modeling & Simulation Fault Activation mfm method reservoir geomechanics drillstem/well testing pressure change assumption...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0248
... stress law as shown in Eq. (1) (Stein and Wysession, 2003) where refers to the normal stress on the fault and refers to the pore pressure on the fault. = (1) Following the effective stress law, the high fluid injection pressure reduces the effective normal stress. Typically faults slip when shear...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1952
... can help to predict the shape of poroelastic deformation and whether or not solid grains would rearrange effectively in a given time. Fluid Dynamics flow rate Closing Time flow in porous media fluid injection capillary force Upstream Oil & Gas injection port test condition enhanced...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-691
... ABSTRACT: Exploitation of unconventional energy resources often requires fluid injection to improve the hydraulic performance of the reservoir. A potential risk associated with these hydraulic stimulation treatments is the unintended development of manmade seismic events. Therefore...

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