A5055327056- Hydraulic Fracturing and Reservoir Analysis
- Drilling and Well Engineering
- Seismic Imaging and Inversion Techniques
- Rock Mechanics and Modeling
- Hydrocarbon exploration and reservoir analysis
- Tunneling and Rock Mechanics
- Enhanced Oil Recovery Techniques
- Groundwater flow and contamination studies
- Reservoir Engineering and Simulation Methods
- earthquake and tectonic studies
- Landslides and related hazards
- CO2 Sequestration and Geologic Interactions
- Geotechnical and Geomechanical Engineering
- Cold Atom Physics and Bose-Einstein Condensates
- Seismic Waves and Analysis
- Dam Engineering and Safety
- Spectroscopy and Chemometric Analyses
- NMR spectroscopy and applications
- Quantum Information and Cryptography
- Geotechnical Engineering and Underground Structures
- Oil and Gas Production Techniques
- Seismology and Earthquake Studies
- Mechanical and Optical Resonators
- Lattice Boltzmann Simulation Studies
- Spectroscopy Techniques in Biomedical and Chemical Research
Los Alamos National Laboratory
2018-2024
Lawrence Berkeley National Laboratory
2023
Government of the United States of America
2022
University of Nottingham
2011-2021
University of Wisconsin–Madison
2020
Environmental Earth Sciences
2019
Imperial College London
2014-2017
Summary In conventional wellbore-integrity analysis, the cement sheath’s initial state of stress and transient thermoporoelastic effects are often neglected. However, is prerequisite information for accurately predicting safe operating conditions that prevent a cemented well from being damaged. addition, can have profound effect on when damage will occur. this paper, we propose model includes these to predict pressures temperatures cement-sheath failure. For stress, proposed an empirical...
Abstract Understanding mechanisms controlling fluid injection-triggered seismicity is key in defining strategies to ameliorate it. Recent triggered events (e.g. Pohang, Mw 5.5) have exceeded predictions of average energy release by a factor >1000x, necessitating robust methodologies both define critical antecedent conditions and thereby constrain anticipated event size. We maximum magnitudes resulting from triggering as function pre-existing stresses injection volume. Fluid experiments on...
Abstract We present hydro‐mechanical measurements that characterize shear on natural fractures in schist, amphibolite, and rhyolite specimens from the enhanced geothermal system (EGS) Collab Project's Experiment 1 2 sites (E1 E2) at Sanford Underground Research Facility. employed a triaxial direct method augmented with X‐ray imaging to perform hydroshearing (injection‐induced shearing) mechanical shearing naturally fractured situ stress conditions. Measurements included fracture...
Abstract Shear fractures can facilitate fluid conductivity through rock. Aperture and roughness are controlling characteristics for a fracture's conductivity. Inspired by en echelon fractures, we develop shear “fracturelet” model that predicts anisotropic aperture with respect to the direction of shearing, rougher (nonplanar) rather than smoother (planar) bounds this coalesced fracture. This tendency fracture creation is validated in situ X‐ray images measurements from triaxial direct...
Abstract Target subsurface reservoirs for emerging low‐carbon energy technologies and geologic carbon sequestration typically have low permeability thus rely heavily on fluid transport through natural induced fracture networks. Sustainable development of these systems requires deeper understanding how geochemically mediated deformation impacts microstructure evolution, particularly with respect to geochemical reactions between pore fluids the host rock. In this work, a series triaxial direct...
Abstract Geothermal resources offer a stable low‐carbon energy source. However, geothermal sites can collocate with the hypocenters of large‐magnitude seismic events. Large events pose risk to public safety and are therefore liability for efforts develop resources. Here, we propose “fracture caging” limit induced event magnitudes present evidence from numerical model predictions, laboratory experiments, field observations. Fracture caging involves drilling tactical production wells around...
Abstract Fluid injection into rock formations can either produce complex branched hydraulic fractures, create simple planar or be dominated by porous diffusion. Currently, the optimum parameters to fractures are unknown. We conducted repeatable fracturing experiments using analog‐rock samples with controlled heterogeneity quantify fluid that promote fracture branching. A large range of rates and viscosities were used investigate their effects on induced patterns. Paired a analytical model,...
The UK National Quantum Technology Hub in Sensors and Metrology is one of four flagship initiatives the Program. As part a 20-year vision it translates laboratory demonstrations to deployable practical devices, with game-changing miniaturized components prototypes that transform state-of-the-art for quantum sensors metrology. It brings together experts from Universities Birmingham, Glasgow, Nottingham, Southampton, Strathclyde Sussex, NPL currently links over 15 leading international...
The development of focused ion beam-scanning electron microscopy (FIB-SEM) techniques has allowed high-resolution 3D imaging nanometre-scale porous materials. These systems are important interest to the oil and gas sector, as well for safe long-term storage carbon nuclear waste. This work focuses on validating accurate representation sample pore space in FIB-SEM-reconstructed volumes predicted permeability these from subsequent single-phase flow simulations using a highly homogeneous...
Summary Accurate characterization of oilwell cement mechanical properties is key to establishing long-term wellbore integrity. The most widely used method curing in an autoclave, demolding, cutting, and transferring it a triaxial compression apparatus. drawback this traditional technique that the are not measured under in-situ conditions. In paper, we developed high-pressure high-temperature vessel hydrate downhole conditions then directly measure Young’s modulus Poisson’s ratio without...
The authors theoretically analyze the performance and functionality of atom chips. results show that graphene-based van der Waals heterostructures result in a much longer lifetime trapped cloud smaller atom-surface separation than chips based on current-carrying wires.
A key element in the study of cold atoms, and their use emerging quantum technologies, is trapping atoms an ultra-high vacuum (UHV) chamber. Many methods have been used to trap including atom chips magneto-optical traps (MOTs). However, bulky apparatus, current-carrying coils, so far most MOTs restrict reduction power physical size, as required for technology applications. The advent 3D printing now offers a new route making with current paths that can be freely shaped shrunk several...
Abstract Wellbore integrity analysis should consider the cement setting process in a confined downhole environment, noting that is initially liquid becomes solid. In our study, state of stress specimens measured during cure from to solid at laboratory simulated conditions. We apply accurate control axial stress, confining pressure, and pore pressure inside entire combined with strain gauges mounted on outer surface steel pipe measure cement's process. The setup allows multiple experimental...
Abstract Leakage in carbon storage and hydrocarbon wells continues to be an area of concern the development abandonment reservoirs. Industry need for a leakage remediation sealant that can perform systems beyond capability cement squeezes has driven CO2/pH activated "smart" gel. Exploratory laboratory tests mock field scale well test were performed determine effectiveness smart Control gel particle size distribution was demonstrated through batch synthesis experiments. Microfluidic...
Abstract Unconventional oil and gas play a key role in the global transition to clean energy. Advances horizontal drilling hydraulic fracturing have enabled substantial hydrocarbon extraction from shale formations. However, initial high production rates these formations are not sustained over time, leading significantly lower recovery compared conventional reservoirs. Hydrocarbon is governed by complex, multi-physical coupled mechanisms, including fluid diffusion tight matrix, multiphase...
Abstract Managing fluid‐driven fracture networks is crucial for subsurface resource utilization, yet the current understanding of key controlling factors remains insufficient. While geologic discontinuities have been shown to significantly influence network complexity, this study identifies another major contributor. We conducted a new set experiments using transparent true triaxial cell, which enabled video recording temporal evolution paths. Using pseudo‐2D samples without macroscale...