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Featured researches published by Youwei He.


Scientific Reports | 2015

Flow enhancement of water-based nanoparticle dispersion through microscale sedimentary rocks

Haiyang Yu; Youwei He; Peng Li; Shuang Li; Tiantian Zhang; Elena Rodriguez-Pin; Song Du; Chenglong Wang; Shiqing Cheng; Christopher W. Bielawski; Steven L. Bryant; Chun Huh

Understanding and controlling fluids flow at the microscale is a matter of growing scientific and technological interest. Flow enhancements of water-based nanoparticle dispersions through microscale porous media are investigated through twelve hydrophilic sedimentary rocks with pore-throat radius between 1.2 and 10 μm, which are quantitatively explained with a simple model with slip length correction for Darcy flow. Both as wetting phase, water exhibited no-slip Darcy flow in all cores; however, flow enhancement of nanoparticle dispersions can be up to 5.7 times larger than that of water, and it increases with the decreasing of pore-throat radius. The experimental data reveals characteristic slip lengths are of order 500 and 1000 nm for 3M® and HNPs-1 nanoparticles, respectively, independent of the lithology or nanoparticle concentration or shear rate. Meanwhile, the phenomenon of flow degradation is observed for HNPs-2 nanoparticles. These results explore the feasible application of using nanoparticle dispersions to control flow at the microscale.


The Scientific World Journal | 2014

Numerical Well Testing Interpretation Model and Applications in Crossflow Double-Layer Reservoirs by Polymer Flooding

Haiyang Yu; Hui Guo; Youwei He; Hainan Xu; Lei Li; Tiantian Zhang; Bo Xian; Song Du; Shiqing Cheng

This work presents numerical well testing interpretation model and analysis techniques to evaluate formation by using pressure transient data acquired with logging tools in crossflow double-layer reservoirs by polymer flooding. A well testing model is established based on rheology experiments and by considering shear, diffusion, convection, inaccessible pore volume (IPV), permeability reduction, wellbore storage effect, and skin factors. The type curves were then developed based on this model, and parameter sensitivity is analyzed. Our research shows that the type curves have five segments with different flow status: (I) wellbore storage section, (II) intermediate flow section (transient section), (III) mid-radial flow section, (IV) crossflow section (from low permeability layer to high permeability layer), and (V) systematic radial flow section. The polymer flooding field tests prove that our model can accurately determine formation parameters in crossflow double-layer reservoirs by polymer flooding. Moreover, formation damage caused by polymer flooding can also be evaluated by comparison of the interpreted permeability with initial layered permeability before polymer flooding. Comparison of the analysis of numerical solution based on flow mechanism with observed polymer flooding field test data highlights the potential for the application of this interpretation method in formation evaluation and enhanced oil recovery (EOR).


Polymers & Polymer Composites | 2017

Pressure Transient Behavior for Alternating Polymer Flooding in a Three-zone Composite Reservoir

Changyu Zhu; Shiqing Cheng; Youwei He; Engao Tang; Xiaodong Kang; Yao Peng; Haiyang Yu

Alternating polymer flooding has achieved great attractions recently in oil industry, however, the research of pressure analysis in alternating polymer flooding reservoir is rare. This work presents a numerical pressure analysis method of three-zone composite model for formation evaluation. A new numerical pressure analysis model (three-zone composite model) is established by considering diffusion, convection, shear, and inaccessible pore volume, which is based on the rheology experiments. Based on this model, the type curves are then developed and sensitivity analysis is further conducted. The type curves have seven regimes in three-zone composite model. The characteristic is the obvious upturn of pressure derivative curve in transient regime between low concentration and high concentration polymer solution. Formation parameters can be interpreted by history matching and formation evaluation can be conducted based on this model. As an important part of formation evaluation, formation damage as a result of adsorption of polymers in porous media is evaluated by comparing the interpreted permeability with the original value before polymer flooding. The field test data proves that this proposed method can accurately evaluate reservoir characteristics in alternating polymer flooding reservoirs, which emphasizes the potential application of this method in petroleum industry.


Spe Journal | 2017

A Semianalytical Methodology To Diagnose the Locations of Underperforming Hydraulic Fractures Through Pressure-Transient Analysis in Tight Gas Reservoir

Youwei He; Shiqing Cheng; Shuang Li; Yao Huang; Jiazheng Qin; Limin Hu; Haiyang Yu


Spe Reservoir Evaluation & Engineering | 2017

Waterflood Direction and Front Characterization With Four-Step Work Flow: A Case Study in Changqing Oil field, China

Youwei He; Shiqing Cheng; Lei Li; Guoquan Mu; Tiantian Zhang; Hainan Xu; Jiazheng Qin; Haiyang Yu


Journal of Petroleum Science and Engineering | 2017

The physical process and pressure-transient analysis considering fractures excessive extension in water injection wells

Yang Wang; Shiqing Cheng; Naichao Feng; Youwei He; Haiyang Yu


SPE Middle East Oil & Gas Show and Conference | 2017

A Semianalytical Approach to Estimate the Locations of Malfunctioning Horizontal Wellbore through Bottom-Hole Pressure and Its Application in Hudson Oilfield

Youwei He; Shiqing Cheng; Jiazheng Qin; Yang Wang; Naichao Feng; Limin Hu; Yao Huang; Ran Fang; Haiyang Yu


SPE Annual Technical Conference and Exhibition | 2017

Estimation of Non-Uniform Production Rate Distribution of Multi-Fractured Horizontal Well Through Pressure Transient Analysis: Model and Case Study

Jiazheng Qin; Shiqing Cheng; Youwei He; Le Luo; Yang Wang; Naichao Feng; Tiantian Zhang; Guan Qin; Haiyang Yu


Journal of Petroleum Science and Engineering | 2017

A semianalytical approach to estimate fracture closure and formation damage of vertically fractured wells in tight gas reservoir

Yao Huang; Shiqing Cheng; Haiyang Yu; Youwei He; Botao Lin; Naichao Feng


SPE Oil & Gas India Conference and Exhibition | 2015

Waterflood Direction and Front Characterization with Multiple Methods: A Case Study in Changqing Oilfield, China

Youwei He; Shiqing Cheng; Lei Li; Guoquan Mu; Tiantian Zhang; Hainan Xu; Jiazheng Qin; Haiyang Yu

Collaboration


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Shiqing Cheng

China University of Petroleum

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Haiyang Yu

China University of Petroleum

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Jiazheng Qin

China University of Petroleum

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Yang Wang

China University of Petroleum

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Naichao Feng

China University of Petroleum

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Tiantian Zhang

University of Texas at Austin

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Le Luo

China University of Petroleum

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Yao Huang

China University of Petroleum

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Hainan Xu

China University of Petroleum

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