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Featured researches published by Yifei Xu.


Scientific Reports | 2016

Simulation Study of CO2-EOR in Tight Oil Reservoirs with Complex Fracture Geometries

Pavel Zuloaga-Molero; Wei Yu; Yifei Xu; Kamy Sepehrnoori; Baozhen Li

The recent development of tight oil reservoirs has led to an increase in oil production in the past several years due to the progress in horizontal drilling and hydraulic fracturing. However, the expected oil recovery factor from these reservoirs is still very low. CO2-based enhanced oil recovery is a suitable solution to improve the recovery. One challenge of the estimation of the recovery is to properly model complex hydraulic fracture geometries which are often assumed to be planar due to the limitation of local grid refinement approach. More flexible methods like the use of unstructured grids can significantly increase the computational demand. In this study, we introduce an efficient methodology of the embedded discrete fracture model to explicitly model complex fracture geometries. We build a compositional reservoir model to investigate the effects of complex fracture geometries on performance of CO2 Huff-n-Puff and CO2 continuous injection. The results confirm that the appropriate modelling of the fracture geometry plays a critical role in the estimation of the incremental oil recovery. This study also provides new insights into the understanding of the impacts of CO2 molecular diffusion, reservoir permeability, and natural fractures on the performance of CO2-EOR processes in tight oil reservoirs.


Spe Reservoir Evaluation & Engineering | 2017

Discrete-Fracture Modeling of Complex Hydraulic-Fracture Geometries in Reservoir Simulators

Yifei Xu; Jose Sergio de Araujo Cavalcante Filho; Wei Yu; Kamy Sepehrnoori


SPE Hydraulic Fracturing Technology Conference and Exhibition | 2017

Impact of Well Interference on Shale Oil Production Performance: A Numerical Model for Analyzing Pressure Response of Fracture Hits with Complex Geometries

Wei Yu; Yifei Xu; Ruud Weijermars; Kan Wu; Kamy Sepehrnoori


Aiche Journal | 2018

Simulation of shale gas transport and production with complex fractures using embedded discrete fracture model

Wei Yu; Yifei Xu; Malin Liu; Kan Wu; Kamy Sepehrnoori


Spe Reservoir Evaluation & Engineering | 2017

A Numerical Model for Simulating Pressure Response of Well Interference and Well Performance in Tight Oil Reservoirs With Complex-Fracture Geometries Using the Fast Embedded-Discrete-Fracture-Model Method

Wei Yu; Yifei Xu; Ruud Weijermars; Kan Wu; Kamy Sepehrnoori


Journal of Petroleum Science and Engineering | 2018

Numerical study of complex fracture geometry effect on two-phase performance of shale-gas wells using the fast EDFM method

Mohammad AlTwaijri; Zhaohui Xia; Wei Yu; Liangchao Qu; Yunpeng Hu; Yifei Xu; Kamy Sepehrnoori


SPE/AAPG/SEG Unconventional Resources Technology Conference | 2017

Modeling Dynamic Behaviors of Complex Fractures in Conventional Reservoir Simulators

Yifei Xu; Wei Yu; Kamy Sepehrnoori


SPE Improved Oil Recovery Conference | 2016

Modeling Dynamic Wettability Alteration Effect Based on Contact Angle

Hamid R. Lashgari; Yifei Xu; Kamy Sepehrnoori


SPE Annual Technical Conference and Exhibition | 2015

Modeling Fishbones Using the Embedded Discrete Fracture Model Formulation: Sensitivity Analysis and History Matching

Jose Sergio de Araujo Cavalcante Filho; Yifei Xu; Kamy Sepehrnoori


SPE Annual Technical Conference and Exhibition | 2018

Modeling Fault Reactivation Using Embedded Discrete Fracture Method

Shayan Tavassoli; Yifei Xu; Kamy Sepehrnoori

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Kamy Sepehrnoori

University of Texas at Austin

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Pavel Zuloaga-Molero

University of Texas at Austin

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Hamid R. Lashgari

University of Texas at Austin

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Jijun Miao

University of Texas at Austin

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Mohammad AlTwaijri

University of Texas at Austin

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Shayan Tavassoli

University of Texas at Austin

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