Results 31 to 40 of about 849 (184)

Mean value coordinates–based caricature and expression synthesis [PDF]

open access: yes, 2013
We present a novel method for caricature synthesis based on mean value coordinates (MVC). Our method can be applied to any single frontal face image to learn a specified caricature face pair for frontal and 3D caricature synthesis.
B. Gooch   +9 more
core   +1 more source

A hydro‐mechanically‐coupled XFEM model for the injection‐induced evolution of multiple fractures

open access: yesInternational Journal for Numerical and Analytical Methods in Geomechanics, Volume 47, Issue 9, Page 1539-1558, 25 June 2023., 2023
Abstract In this paper, a two‐dimensional eXtended Finite Element Method (XFEM) solution is presented for the hydro‐mechanically coupled hydro‐frac‐induced propagation of multiple fractures in rocks. Fractures are considered one‐dimensional objects, and the rock matrix is regarded as a two‐dimensional medium.
Yuxiao Wang   +2 more
wiley   +1 more source

Numerical simulation of fractured horizontal well considering threshold pressure gradient, non‐Darcy flow, and stress sensitivity

open access: yesEnergy Science &Engineering, Volume 11, Issue 2, Page 811-825, February 2023., 2023
To predict the production of fractured horizontal wells more accurately, we establish a numerical simulation model of fractured horizontal wells that considers the threshold pressure gradient, non‐Darcy flow, and stress sensitivity using the embedded discrete fracture model.
Honglin Xiao   +5 more
wiley   +1 more source

Applying Reservoir Simulation and Artificial Intelligence Algorithms to Optimize Fracture Characterization and CO2 Enhanced Oil Recovery in Unconventional Reservoirs: A Case Study in the Wolfcamp Formation

open access: yesEnergies, 2022
Reservoir simulation for unconventional reservoirs requires proper history matching (HM) to quantify the uncertainties of fracture properties and proper modeling methods to address complex fracture geometry. An integrated method, namely embedded discrete
Xincheng Wan   +5 more
doaj   +1 more source

$S^{3}$ and $S^{4}$ Reductions of Type IIA Supergravity [PDF]

open access: yes, 2000
We construct a consistent reduction of type IIA supergravity on S^3, leading to a maximal gauged supergravity in seven dimensions with the full set of massless SO(4) Yang-Mills fields.
Cvetic, M   +4 more
core   +2 more sources

A Coupled Novel Green Element and Embedded Discrete Fracture Model for Simulation of Fluid Flow in Fractured Reservoir

open access: yesGeofluids, 2021
In this study, we present a hybrid model coupled with two-set nodes Green element method (GEM) and embedded discrete fracture model (EDFM) for capturing the effect of transient flow in inhomogeneous fractured porous media.
Linsong Cheng   +4 more
doaj   +1 more source

An Improved Embedded Discrete Fracture Model with Fracture Growth for Water-Induced Fracture Simulation in Low Permeability Reservoirs

open access: yesLithosphere, 2022
Water injection is often used to supply formation energy in low permeability reservoirs. A lot of field data shows that fractures nearby the wellbores may extend hundreds of meters because of the poor injectability which is called water-induced fractures.
Chenxu Yang   +4 more
doaj   +1 more source

Embedded Discrete Fracture Modeling as a Method to Upscale Permeability for Fractured Reservoirs

open access: yesEnergies, 2019
Fractured reservoirs are distributed widely over the world, and describing fluid flow in fractures is an important and challenging topic in research. Discrete fracture modeling (DFM) and equivalent continuum modeling are two principal methods used to ...
Zhenzhen Dong   +4 more
doaj   +1 more source

Simulation of a multistage fractured horizontal well in a tight oil reservoir using an embedded discrete fracture model

open access: yesEnergy Science & Engineering, 2019
As an unconventional resource, tight oil reservoirs hold abundant geological reserves and great development potential. However, tight oil reservoirs suffer from high heterogeneity and low permeability.
Yu‐long Zhao   +4 more
doaj   +1 more source

Effect of Complex Natural Fractures on Economic Well Spacing Optimization in Shale Gas Reservoir with Gas-Water Two-Phase Flow

open access: yesEnergies, 2020
At present, investigation of the effects of natural fractures on optimal well spacing of shale gas reservoirs from an economic perspective has been lacking.
Cheng Chang   +5 more
doaj   +1 more source

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