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Keywords: sediment
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Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0333
... ABSTRACT: Due to the special characteristics of natural gas hydrate sediments, previous models of open-hole extended-reach limit without considering their thermosensitive feature are not applicable. Study on the open-hole extended-reach limit considering the coupling relationship between the...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1928
... stabilized in the slope, the hydrate zone would inhibit the expansion of the plastic zone due to the high strength of hydrate sediment with a slight increase of the slope safety factor. As the hydrate decomposition radius reached 100 m, the plastic zone first appeared in the hydrate decomposition zone, then...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1887
... must be taken. Upstream Oil & Gas particle size sand control wave velocity sand control measure flow assurance sand production hydrate reservoir experimental study rock sample gas hydrate sediment sand production experiment reservoir Modeling & Simulation experiment...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1533
... carbonate rock synthetic rock sediment Upstream Oil & Gas porous medium Pernambuco injection chemical dissolution dissolution complex reservoir dissolution cell laboratory acid solution time evolution Reservoir Characterization strength permeability porosity dissolution test carbonate...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1579
... ABSTRACT: We simulate behavior of salt-basin sediments using a constitutive formulation that incorporates stress-level dependency and compare the results to those from a constant-friction-angle material model. Specifically, we simulate sediment behavior with SR3KH, a critical state model...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1591
.... Models are drained and use poro-elastic material behavior for the sediments and viscoplastic behavior for the salt. We found that both models show a horizontal stress reduction above the salt diapir that was targeted by an exploratory well. These results where validated by the data coming from the...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-637
... ABSTRACT: We use an evolutionary geomechanical model to study stress and deformation in sediments during the emplacement of a frontal-rolling salt sheet. We show that overturned-roof sediments develop high differential stresses and plastic strains. We illustrate that these high plastic...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-175
... equivalent density drilling mud density extended-reach limit Upstream Oil & Gas horizontal section dissociation gas hydrate sediment hydrate-bearing sediment gradient permafrost region 1. INTRODUCTION Natural gas hydrates are crystals composed of mostly methane gas under the circumstance of...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-438
... velocity shallow gas colony algorithm experimental data inversion drilling operation sand body optimization problem shallow gas risk algorithm sediment longitudinal wave velocity 1. INTRODUCTION Offshore petroleum exploration and development in the proportion of global petroleum development...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-790
...-scale (Heidari et al. 2015; Heidari et al. 2016; Fredrich et al. 2003; Luo et al. 2012). As a result of this behavior, salt is almost unable to sustain differential stress, leading to significant stress perturbation in sediments surrounding salt. We use the original and the enhanced MCC models to...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1049
... distribution sediment gas hydrate bearing sand 1. INTRODUCTION Methane hydrates are ice-like solids in which water molecules form a cage-like molecular structure that traps methane (Yamamoto et al., 2008). It forms under high pressure and low temperature condition and is widely distributed under deep...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1199
... assumptions of the widely used Hertz- Mindlin model are violated in this type of sediment and the model drastically overpredicts velocities. Our results indicate that the Hertzian contact model should be applied with caution to angular, unconsolidated sediments.The Hertzian contact model is commonly used to...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1219
... distribution architecture sediment 1. INTRODUCTION Both mechanical and hydraulic behavior of poorly lithified siliciclastic rocks are considerably affected by tectonic strain. The presence of structures like joints, faults and deformation or compaction bands may obliterate porous network or generate new...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0209
... ABSTRACT: The Nile sediments are characterized by its unique behavior where silt size particles exhibit significant plasticity. Cohesive Nile Sediments are collected and resedimented in two different forms of consolidometers. The paper presents a standardized process of resedimenting the...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0345
... Reservoir Characterization total mean stress geomechanical model salt sheet shear reservoir geomechanics pore pressure Upstream Oil & Gas Mean stress prediction porosity emplacement loading sedimentation stress state workflow overpressure pressure prediction deposition...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0701
... sediment sequence deformation American Rock mechanics Association in-situ stress 1. INTRODUCTION A Layered Evaporite Sequence (LES) is a compositionally stratified heterolithic sequence comprising salt(s) and sediments. Some examples of salt basins containing layered evaporites are the Brazilian...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0881
... mudrock sediment pressure increase ABSTRACT: We study the effects of a highly permeable sand layer on pore pressure and stresses near a salt diapir by using a forward hydro-mechanical finite-element model. We compare a salt basin entirely composed of mudrocks to the same basin but with a highly...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-790
... dipping structures above salt domes, understanding factors governing salt behavior over geological time is of paramount importance. Controls on salt movement often focus on the inclination of the margin and the delivery of prograding sediment packages – both of which serve to drive salt towards deeper...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-035
... Abstract: We use an evolutionary finite-element model to determine changes in stress and geomechanical features of sediments near a welding source layer of a salt wall. We show that a significant stress concentration develops at the weld tip, which is experienced by all sediments along the...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-545
... Abstract: We use large-strain, drained poro-mechanical models to investigate the evolution of stress and porosity in fold-and-thrust belt systems. We impose horizontal displacement on an initially horizontal sediment layer to simulate the lateral tectonic loading. We find that the maximum...

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