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HanYi Wang

Publications and source records attributed to HanYi Wang.

7 recordsLinked to original sources
arXiv2019

Hydraulic Fracture Propagation in Naturally Fractured Reservoirs: Complex Fracture or Fracture Networks

Understanding the behavior of fluid-driven hydraulic fracture in naturally fractured reservoirs is crucial in the development of geothermal energy and unconventional reservoirs. This study presents a fully-coupled numerical model to investigate hydraulic propagation in naturally fractured reservoirs, along with a comprehensive discussion on field observations. The results indicate that, contrary to our common beliefs, "Complex Fracture" rather than "Fracture Networks" is the norm in these naturally fractured reservoirs

physics.geo-ph↗
arXiv2019

Estimating Un-propped Fracture Conductivity and Fracture Compliance from Diagnostic Fracture Injection Tests

Fractures are ubiquitous in the subsurface. The flow and mechanical properties of these fractures are controlled by its compliance or stiffness. Characterizing fracture compliance and conductivity is crucial in applications such as fault zone studies, underground CO2 sequestration, nuclear waste repositories, geothermal energy exploitation and hydrocarbon reservoir development. In this study, we present a time convolution solution of pressure transient behavior of a closing fracture. From Diagnostic Fracture Injection Tests, our presented method can be used to estimate subsurface fracture conductivity and compliance as a function of effective stress.

physics.geo-ph↗
arXiv2017

A computationally efficient approach to modeling contact problems and fracture closure using superposition method

Characterizing fracture closure behavior, surface roughness and fracture compliance is crucial in many earth sciences, such as fault zone studies, underground CO2 sequestration, nuclear waste repositories and geothermal energy exploitation. In this study, we present a computationally efficient method to model fracture closure on surface asperities, which can be can be used to quantify and simulate mechanical, hydraulic, and transport properties of subsurface fractures

physics.geo-ph↗
arXiv2017

A Non-Local Model for Fracture Closure on Rough Fracture Faces and Asperities

Fractures are ubiquitous in the subsurface. The flow and mechanical properties of these fractures are controlled by its compliance or stiffness. Characterizing fracture compliance is crucial in applications such as fault zone studies, underground CO2 sequestration, nuclear waste repositories and geothermal energy exploitation. In this study, we present a method to determine fracture compliance by modeling fracture closure on asperities using integral transform.

physics.geo-ph↗
arXiv2017

A Numerical Study of Thermal-Hydraulic-Mechanical (THM) Simulation with the Application of Thermal Recovery in Fractured Shale Gas Reservoirs

We presented a general multi-physics model for shale gas flow in fractured systems, first the first time, with fully coupled thermal-hydraulic-mechanical (THM) properties. The impact of gas adsorption, real gas properties, gas flow in nano-scale pore space and geomechanics effects on total gas flow capacity are investigated. We also showed that by elevating shale rock temperature, the characteristic of gas adsorption behavior can be substantially altered.

physics.geo-ph↗
arXiv2017

New Variable Compliance Method for Estimating In-Situ Stress and Leak-Off from DFIT Data

It is shown that using Carter leak-off is an oversimplification that leads to significant errors in the interpretation of DFIT data. Most importantly, this article reveals that previous methods of estimating minimum in-situ stress often lead to significant over or underestimates. Based on our modeling and simulation results, we propose a much more accurate and reliable method to estimate the minimum in-situ stress and fracture pressure dependent leak-off rate.

physics.geo-ph↗