Seismic Wave Simulation in Fractured Media

Fractured reservoirs, including unconventional fields, are important in global energy supply, particularly for carbonate source rocks. Fractures can influence subsurface fluid flow and the stress state of a reservoir. The knowledge about the existence of fractures, their spatial distributions, and orientations can help us optimize well productivity and reservoir performance. Seismic detection of subsurface fractures provides important measurements to remotely image field-scale fractures. In developing such technology, forward modeling of the seismic response from fractures in the reservoir provides an important alternate tool for imaging subsurface fractures. In this paper, we implement a seismic modeling algorithm which can simulate 3D wave propagation in an arbitrary background media with imbedded fractures. During modeling, the fractures are added to the background medium by linear slip theory. Examples demonstrated the impacts of fractures on the wave propagation patterns for both PP and PS waves. We also investigate the amplitude versus offset (AVO) effects caused by fractures in a layer media and lay out potential applications of forward modeling in the inversion of fracture parameters and the estimation of fluid contents.

Weather Forecasting Based on Data-Driven and Physics Informed Reservoir Computing Models

In response to the growing demand for the global energy supply chain, wind power has become an important research subject among studies in the advancement of renewable energy sources. The major concern is the stochastic volatility of weather conditions that hinder the development of wind power forecasting approaches. To address this issue, the current study proposes a weather prediction method divided into two models for wind speed and atmospheric system forecasting. First, the data-based model incorporated with wavelet transform and recurrent neural networks is employed to predict the wind speed. Second, the physics-informed echo state network was used to learn the chaotic behaviour of the atmospheric system. The findings were validated with a case study conducted on wind speed data from Turkmenistan. The results suggest the out-performance of physics-informed model for accurate and reliable forecasting analysis, which indicates the potential for implementation in wind energy analysis.

The Politics of Climate Change and the Rising Demand for Global Energy in the 21st Century

Established that most governments prefer to boost global energy supply because it improves economies and translates to gainful employment for citizens, the rising global demand for energy from various sectors continues to trigger unprecedented consequences on the environment, resulting in hazardous implications. Hence, scientists argue that the rising demand for global energy by industrialized nations increases the vulnerability of persons and polities where these energy and mineral resources abound. Consequently, governments, multinationals, etc. are at a crossroads regarding how best to address this dilemma. Creswell's mix-method research deign and Merlyn's ex-post facto research methods for analyzing qualitative and quantitative data previously obtained from similar studies were used for attaining the objectives of the research. The study identified troubling and high-level politicking at play in most affected countries. Recommendations geared towards addressing the dilemmas emanating from the rising global demand for energy by governments and scholars were proffered.

Building Next-Generation Supercapacitors with Battery type Ni(OH)2

Electrochemical energy-storage technologies remain the only key to puzzle out the increasing major demands of global energy supply, zero-emission transportation and grid storage in a greener way. Accordingly, the novel...

Research on Energy Industry Strategy Based on Intelligent Digital Upgrading

The global energy supply and demand are constantly changing, and toward the leapfrog development of digital energy. How to further accelerate the pace of energy digital transformation is the direction that many scholars have been exploring. Starting from the background of international energy strategy, this article analyzes and researches new products of energy strategy digitization, energy data center intelligence and digital energy strategy, and then discusses the development trend and significance of intelligence in the future energy field. It aims to use digital technology and intelligent concepts to promote the in-depth integration of energy and modern information technology, promote the transformation of energy production management and marketing models, and reshape the energy industry chain, supply chain and value chain to promote the drawing of an intelligent blueprint in the energy field.

DFT Study of MAX Phase Surfaces for Electrocatalyst Support Materials in Hydrogen Fuel Cells

In moving towards a greener global energy supply, hydrogen fuel cells are expected to play an increasingly significant role. New catalyst support materials are being sought with increased durability. MAX phases show promise as support materials due to their unique properties. The layered structure gives rise to various potential (001) surfaces. DFT is used to determine the most stable (001) surface terminations of Ti2AlC, Ti3AlC2 and Ti3SiC2. The electrical resistivities calculated using BoltzTraP2 show good agreement with the experimental values, with resistivities of 0.460 µΩ m for Ti2AlC, 0.370 µΩ m for Ti3AlC2 and 0.268 µΩ m for Ti3SiC2. Surfaces with Al or Si at the surface and the corresponding Ti surface show the lowest cleavage energy of the different (001) surfaces. MAX phases could therefore be used as electrocatalyst support materials, with Ti3SiC2 showing the greatest potential.

Multiscale Modelling Approach Targeting Optimisation of PCM into Constructive Solutions for Overheating Mitigation in Buildings

Nowadays, the rising gap between the global energy supply and demand is a well-known circumstance in society. Exploring the solution to invert this tendency leads to several different scenarios of energy demand saving strategies that can be improved using phase change materials (PCM), especially in cold-formed steel-framed buildings. The present research reports the overheating (indoor air temperature above 26 °C expressed as an annualized percentage rate) reduction in south-oriented compartments and energy performance of a detached house located in the Aveiro region, in Portugal. An optimisation study was performed incorporating different phase change materials (PCMs) solutions and their position in the exterior envelope focusing overheating rate reduction and heating demand. The optimisations were managed by using a hybrid evolutionary algorithm coupled with EnergyPlus® simulation software. The overheating risk was reduced by up to 24% in the cooling season, for the case of the building compartments with south orientation. Thus, the use of construction solutions using PCMs with different melting temperatures revealed to be a good strategy to maximise PCM efficiency as a passive solution.

Evaluation of Artificial Lift Methods to Increase Oil Production from Depleting Oil Wells in Gulf of Mexico

This paper summarizes the research work with reference to artificial lift methods to increase oil production form mature oil wells in Gulf of Mexico. Increase oil production or oil recovery from oil reservoirs is very important. If the average worldwide recovery factor from hydrocarbon reservoirs can be increased beyond current limits, it will alleviate a number of issues related to global energy supply. Currently the daily oil production comes from mature or maturing oil fields and reserves replacement is not keeping pace with the growing energy demand. This paper presents big picture overview of artificial lift methods for mature oil wells in Gulf of Mexico.

Evaluating China’s Environmental Management and Risks Avoidance Policies and Regulations on Offshore Methane Hydrate Extraction

Methane hydrates (hereinafter, MH), for many reasons, are widely recognized as a form of sustainable energy due to their environmentally friendly nature. MH, while burning, produce fresh water, which could in turn offer one possible solution to worldwide shortages of water. MH also maintains the capacity to change the landscape of the global energy supply. According to recent scientific evaluations, the potential global supply of MH is even higher than the total storage of traditional crude oil and conventional natural gas. However, its offshore extraction process could be linked to both catastrophic and non-catastrophic events that may contribute to global warming and climate change, cause harm to human health and life, endanger the flora and fauna, and threaten the very global environment as a whole. Therefore, from a legal viewpoint, an efficient and effective system of civil liability rules seem crucial to control the risks, and to compensate the victims to which damages may occur. This article takes into consideration China’s legal framework in assessing the risks connected to MH offshore extraction. Such a choice for examination is justified by China’s leading position for implementing the technology necessary for extracting MH. This analysis shows that China’s current legal instruments are still far from fully equipped to prevent the risks associated with the offshore extraction of MH, as well as to offer effective remedies for the victims once any damages have occurred. Therefore, more efficient measures and remedies should be considered (or even imposed) to address the specific risks of offshore methane hydrate extraction. Indeed, in the past few decades, China’s environmental protection laws and regulations have mainly focused on the environmental risks that may occur during the process of extracting conventional resources; however, they do not address methane hydrates specifically. This presents a legal challenge for environmental protection laws. The potentially catastrophic events that may occur as a result of the offshore MH extraction processes in particular present a legal challenge for environmental protection laws in China and across the globe. Thus, this article focuses on how to prevent these risks before they even occur, followed by a careful attempt to address compensation efforts for any damages caused by said catastrophes.