Search

2016-01-01

Yifei Cui, Alireza Nouri, Dave Chan, Ehsan Rahmati

This paper presents a model for the investigation of sandstone degradation and sand production mechanisms coupled with fluid flow analysis using the Discrete Element Method (DEM). The model was used to investigate the effects of in-situ stresses and flow rate on sand production. We developed a...

2016-01-01

Mojtaba Rahimi, Dave Chan, Alireza Nouri

This paper presents a constitutive model for describing the stress-strain response of sands under cyclic loading. The model, formulated using the critical state theory within the bounding surface plasticity framework, is an upgraded version of an existing model developed for monotonic behavior...

2016-01-01

Mojtaba Rahimi, Dave Chan, Alireza Nouri, Rouzbeh Rasouli

Sand response changes with intensity of cementation bonds between sand grains, magnitude of intermediate principal stress and with fabric anisotropy. First a critical state bounding surface plasticity model is presented in this paper. In this constitutive model, the loading surface always...

2018-01-01

Siavash Taghipoor, Morteza Roostaei, Arian Velayati, Atena Sharbatian, Dave Chan, Alireza Nouri

This paper presents a numerical investigation of hydraulic fracturing in oil sands during cold water injection by considering the aspects of both geomechanics and reservoir fluid flow. According to previous studies, the low shear strengths of unconsolidated or weakly consolidated sandstone...

2016-01-01

Mahshid Jafar Pour, Alireza Nouri, Dave Chan

This paper presents a numerical model with a new approach for analyzing the propagation of pressure waves in porous media and investigates the dynamic response of sand in relation to the attributes of pore pressure pulses. There are various instances in which dynamic phenomena can have a...

2018-01-01

Morteza Roostaei, Alireza Nouri, Vahidoddin Fattahpour, Dave Chan

A central issue in hydraulic fracturing treatment in petroleum wells is the transport of proppant particles by the injection fluid. In this paper, we present an innovative proppant transport model in a fixed rectangular- and elliptic-shaped slots. The proposed model is an improvement to the...

2019-01-01

Morteza Roostaei, Siavash Taghipoor, Alireza Nouri, Vahidoddin Fattahpour, Dave Chan

There are aspects of the hydraulic fracturing process that remain unresolved for weakly consolidated sandstones. These issues include fracture modes and geometries for weak sandstones, and higher-than-expected fracture pressure in some field projects. The development of shear bands and the...