Hao Wu

Hao Wu
Los Alamos National Laboratory | LANL · Earth and Environmental Sciences Division

Ph.D

About

24
Publications
3,374
Reads
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138
Citations
Citations since 2016
24 Research Items
137 Citations
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2016201720182019202020212022010203040
2016201720182019202020212022010203040
2016201720182019202020212022010203040

Publications

Publications (24)
Article
Full-text available
Basalt formations are potentially attractive targets for carbon capture and sequestration (CCS) on the basis of favorable CO 2-water-rock reactions, which result in permanent CO 2 isolation through mineral trapping. Recent pilot-scale experiments in Iceland and Washington state, USA, provide promising results that indicate rapid carbon mineralizati...
Article
Full-text available
During carbon sequestration, CO 2 migration is affected by so many uncertainties. • Numerical simulations of multi-phase fluid dynamics are computational expensive. • The combined effects of capillary pressure and relative permeability are explored. • The application of Machine Learning provides a huge computational speed-up. • Capillary pressure i...
Article
Full-text available
Exsolution and re-dissolution of CO2 gas within heterogeneous porous media are investigated using experimental data and mathematical modeling. In a set of bench-scale experiments, water saturated with CO2 under a given pressure is injected into a 2-D water-saturated porous media system, causing CO2 gas to exsolve and migrate upwards. A layer of fin...
Presentation
Full-text available
Successful geologic CO2 storage projects depend on numerical simulations to predict reservoir performance during site selection, injection verification, and post-injection monitoring phases of the project. These numerical simulations solve non-linear sets of coupled partial differential equations, while accounting for multi-phase fluid dynamics on...
Article
Predicting the spatial configuration of gas in nanopores of isrelevant in applications such asfluidflow forecasting and hydrocarbonreserves estimation. For example, shale reservoirs have suffered fromcomputationally intractable multiscale problems, sincefluid properties suchas viscosity, density, and adsorption must be calculated by using expensive...
Article
Full-text available
Pumping oilfield wastewater into deep injection wells causes earthquakes by effective stress change and solid elastic stressing. These processes result from fluid pressure changes in the seismogenic basement, so it is generally accepted that pressure diffusion governs spatiotemporal patterns of induced earthquake sequences. However, new evidence su...
Preprint
Full-text available
Predicting the spatial configuration of gas molecules in nanopores of shale formations is crucial for fluid flow forecasting and hydrocarbon reserves estimation. The key challenge in these tight formations is that the majority of the pore sizes are less than 50 nm. At this scale, the fluid properties are affected by nanoconfinement effects due to t...
Presentation
Full-text available
Increasing production of methane in shale reservoir is one of the major perspectives for gas resource exploration. It is very essential to understand the flow mechanism in shale reservoir at different scales. Molecular dynamics simulation of methane at nano-pores scales provides understanding of methane flow properties, e.g. methane molecular distr...
Article
Full-text available
Recent field experiments in Iceland and Washington State (USA) show that basalt formations may be favorable targets for carbon capture and sequestration (CCS) because CO 2 mineralization reactions proceed rapidly. These results imply that there is tremendous opportunity for implementing CCS in large igneous provinces. However, the magnitude of this...
Article
Full-text available
Oilfield wastewater disposal causes fluid pressure transients that induce earthquakes. Here we show that, in addition to pressure transients related to pumping, there are pressure transients caused by density differences between the wastewater and host rock fluids. In northern Oklahoma, this effect caused earthquakes to migrate downward at ~0.5 km...
Article
To understand the implications of permeability uncertainty in basalt-hosted CCS reservoirs, this study investigates the feasibility of industrial-scale CCS operations within the Columbia River Basalt Group (CRBG). It is generally accepted that plausible constraints on in situ fracture-controlled permeability distributions are un-knowable at reservo...
Presentation
Full-text available
Anthropogenic CO2 emissions are strongly implicated in increasing global temperatures and other serious environmental issues. Carbon capture and sequestration (CCS) is considered as an engineering-based approach designed to reduce the total mass of atmospheric CO2 releases. In the context of CCS, there are four types of trapping mechanisms for CO2...
Conference Paper
Full-text available
This study investigates the feasibility of industrial-scale CCS operations within the Columbia River Basalt Group (CRBG) with an emphasis on understanding the implications of site-scale permeability uncertainty. We develop a Monte Carlo-style numerical modeling experiment in which CO2 sequestration is simulated within 50 stochastically generated an...
Article
Full-text available
During carbon capture and sequestration, capillary forces and buoyancy effects strongly influence CO2 migration and plume geometry. To understand interactions between these processes, we implement a numerical modeling experiment of CO2 injections in a sandstone reservoir to understand how parametric variability reported in the literature affects nu...
Presentation
Full-text available
Geological Carbon Sequestration (GCS) is considered a key method to mitigate the climate change problem caused by excessive CO2 emission. During the past decades, numerical simulation has been treated as one technique for better understanding the injection, migration and leakage of supercritical CO2 (scCO2) during GCS process. Capillary pressure (P...
Presentation
Full-text available
Geological Carbon Sequestration(GCS)is considered as a key method for mitigatingthe adverse effects of steadily increasing atmospheric CO2concentrations. Numerical simulationis one technique for better understandingthe injection, migration and leakage of supercriticalCO2(scCO2) during GCS. At the field scale, capillary pressure (Pcap) is an importa...

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