Oil, Gas, and Energy Commons^™

Effects Of Pressure Drop Funnels Model Of Different Shapes On Cbm Well Productivity, Hu Haiyang, Jin Jun, Zhao Lingyun, Chen Jie, Gu Jiaoyang

Coal Geology & Exploration

In order to study the effect of pressure drop funnel shapes on CBM well productivity, the change law of pressure and the shape of pressure drop funnel in different drainage stages of CBM wells were discussed, the mathematical models of pressure drop funnel were established, the concept of "desorption coefficient" and "effective desorption coefficient" for coal reservoir were proposed to quantitative study desorption effect of the coal reservoir. Taking a CBM well in the west of Guizhou as an example, the research results show that the logarithmic function model of pressure distribution of radial flow is difficult to accurately reflect …

Diffusion Ability Of Contaminants Of Coal Gangue Leachate In Geosynthetic Clay Liners, Dong Xingling, Dong Shuning, Zhou Zhenfang, Wang Qiangmin, Liu Ji

Coal Geology & Exploration

To verify the feasibility of geosynthetic clay liners(GCL) as liners material for coal gangue impoundment, diffusion tests were conducted with vertical double reservoir method to determine the diffusion ability of heavy metals(Zn²⁺、Mn²⁺) and sulfate from coal gangue leachate in GCL-S(Sodium-activated bentonite), and POLLUTE V7 based on finite layer method was used to draw the fitting curve of pollutant changing with time in the diffusion device, which calculated the diffusion coefficient of contaminants in GCL. The data show that the diffusion coefficient in GCL was lower than that in compacted clay liners, so GCL could control the …

Occurrence Regularity Of Uppermost Minable Coal Seams And Their Harmful Level Of Mining In Yushen Mining Area, Li Zhixue, Shen Xiaolong, Li Mingpei, Wang Hongsheng

Coal Geology & Exploration

In order to study the occurrence regularity of uppermost mining coal seams and the damage degree of Salawusu Formation aquifer caused by mining in Yushen mining area, occurrence characteristics of the uppermost mining coal seams was analyzed, and spatial distribution law and combination of the uppermost mining coal seams overlying strata, the development law of the water flowing fractured zone based on the ratio of rock and loading thickness and mining height, and the damage degree of the Salawusu Formation aquifer caused by coal seam mining. The damage degree of the Salawusu Formation aquifer was divided into four kinds of …

Water Yield Analysis Of Underground Drainage Boreholes On The Basis Of Logarithmic Normal Distribution, Ma Lianjing, Zhao Baofeng

Coal Geology & Exploration

In order to analyze the distribution rule of water flow from underground drainage borehole in coal mines, histogram, Q-Q chart and nonparametric tests were used to test the logarithmic normal distribution model for water flow from underground drainage borehole in typical working face, and the nonlinear regression model was fitted. Combined with hydrogeological conditions, the parameters in the model were analyzed. The result shows that water flow from underground drainage boreholes in working face obeys the lognormal distritution. The logarithmic mean and standard deviation of water flow from drainage borehole of typical working face have a positive linear dependence relation …

Prediction Of The Height Of Water Flowing Fractured Zone Under Subcritical Mining Based On Dimensional Analysis, Lou Gaozhong, Guo Wenbing, Gao Jinlong

Coal Geology & Exploration

In order to accurately predict the height of water flowing fractured zone under subcritical mining, mining thickness M, mining depth H, inclined length of working face L, dip angle of coal seam α, overburden mechanical properties R, overburden structure characteristics S were selected as the main influencing factors on the height of water flowing fractured zone under subcritical mining. Dimensionless relations between the height of water flowing fractured zone and M, H, L, α, S were established by dimensional analysis. Based on 30 sets of measured data, the optimal function relation of dimensionless relation was …

Ga_Svm_Adaboost Model For Prediction Of Earthquake-Induced Sandy Soil Liquefaction, Mao Zhiyong, Huang Chunjuan, Lu Shichang

Coal Geology & Exploration

In order to predict the liquefaction of sand, the seismic intensity, groundwater level, covering thickness, standard number, average particle size, landform, soil quality and inhomogeneity coefficient are selected as influencing factors. Genetic algorithm(GA) is used to optimize the parameters of support vector machine(SVM) by using correlation analysis and factor analysis model, and combining with Adaboost iterative algorithm, the GA_SVM_Adaboost model for predicting the liquefaction of sand is established. 329 sets of survey data of sandy liquefaction site in Tangshan earthquake were used to train the model, and 68 samples of sandy liquefaction data were predicted by using the good model. …

Feasibility Test Of Roof Resistivity Monitoring For Super-High Mining Face, Lu Jingjin, Li Deshan, Wang Bingchun

Coal Geology & Exploration

The failure of roof overburden is one of the main reasons for water inrush in mining working face. Roof resistivity monitoring by mine electrical method can be used to detect overburden failure dynamically. However, roof resistivity monitoring for super-high mining face has many problems, such as audio electromagnetic signal by conventional methods is difficult to penetrate through wide working face, burying of roof monitoring electrodes is difficult, monitoring electrode in the roof of air return lane is hard to protect, and so on. In order to solving these problems, feasibility study of roof resistivity monitoring for super-high mining face is …

Detection Electric Field Control Strategy For Advanced Scanning Detection Of Focusing Multipoint Current Sources In Coal Mine Roadway, Liu Zhimin, Meng Cairu, Li Bing, Han Lei, Pan Yue

Coal Geology & Exploration

In order to realize the effective detection of electric field focusing depth and deflection angle scanning of focusing multipoint current sources in coal mine roadway, and accurately grasp its variation, according to the advanced scanning detection mechanism, Gauss theorem and two different methods were used to solve the integration process and derive the electric field line equation of a uniformly charged linear electrode with finite length. The electric field line equation of coplanar multi-electrode layout is induced and deduced through using its spatial distribution symmetry. By changing focusing shielding current ratio coefficient, this paper calculates the boundary line equation of …

Development Of High Temperature Borehole Inclinometer, Qu Zhaogui, Gong Mingmao, Zhou Ce, Wang Guangzhai

Coal Geology & Exploration

In the detection of high-temperature and high-pressure dry heat rock drilling location trajectory, the instrument has some problems, such as poor performance, poor stability, low measurement accuracy and large energy consumption. A set of high temperature borehole inclining device is designed to solve the problem of high temperature and high pressure measurement deviation and temperature measurement. Adopt high temperature resistant components, design control and measurement circuit. Automatic intermittent power supply is adopted to reduce heat dissipation and power consumption. The design of heat preservation pipe and pressure detection pipe is carried out by using ANSYS finite element software to conduct …

Application Of Wire Line Coring Technique In Overburden Drilling, Li Baijun, Zou Run, Guo Chao

Coal Geology & Exploration

In order to improve the drilling efficiency of two oil and gas geological survey wells "Jitaodi 1" and "Ji Bai Di 1" in Baicheng area of Jilin Province, wireline coring technique was applied in overburden drilling. Based on the lithological characteristics of the drilled strata, combined with the technological characteristics of core extraction by lifting the drill pipe and wireline core extraction, by designing the bit, drilling flushing fluid and by improving drilling procedure parameters, drilling tool nozzle flow channel, the wireline coring drilling method has been successfully applied in drilling overburden strata(about 1 100 m thick). Compare with the …

Wavenumber-Dependent Complex Refractive Indices Of Synthetic Motor Oil By Aerosol Extinction Spectra, Daniel Olesak

DePaul Discoveries

Wavenumber-dependent, complex refractive indices, or optical constants, in the mid-infrared for unused Pennzoil 0W-20 motor oil have been obtained from aerosol extinction spectroscopy at room temperature. The oil’s spectroscopy is dominated by carbon-hydrogen stretching modes similar to those observed in spectra for pure alkanes. These same characteristic features were observed in a previously reported motor oil study. The optical constants retrieved here are an addition to the small number of data sets in the scientific literature for organic compounds many of which are components of aerosols present in the lower troposphere, particularly in urban areas. Such data offer new perspectives …

Design And Testing Of A Reciprocating Wind Harvester, Ahmet Topcuoglu

USF Tampa Graduate Theses and Dissertations

Renewable energy sources are vital to reduce dependence on fossil fuels that are harmful for the environment and release greenhouse gases causing global warming. Wind energy is a natural source of energy that is abundant in the environment. While wind turbines are most popular, convenient, and used to harvest energy at large scales, there have been recent studies focusing on harvesting energy from the wind for microdevices. Such micro wind energy harvesters can decrease dependence on batteries.

In this study, a novel, framed flag micro wind harvester was designed and tested, and its behavior at three different wind speeds was …

Quantifying Methane Emissions In The Uintah Basin During Wintertime Stagnation Episodes, C. S. Foster, Erik T. Crosman, J. D. Horel, Seth Lyman, B. Fasoli, R. Bares, J. C. Lin

Bingham Research Center

This study presents a meteorologically-based methodology for quantifying basin-scale methane (CH₄) emissions in Utah’s Uintah Basin, which is home to over 9,000 active and producing oil and natural gas wells. Previous studies in oil and gas producing regions have often relied on intensive aircraft campaigns to estimate methane emissions. However, the high cost of airborne campaigns prevents their frequent undertaking, thus providing only daytime snapshots of emissions rather than more temporally-representative estimates over multiple days. Providing estimates of CH₄ emissions from oil and natural gas production regions across the United States is important to inform leakage rates …

Shale Play: Poems And Photographs From The Fracking Fields By Julia Spicher Kasdorf And Steven Rubin, Kelly Shepherd

The Goose

Review of Julia Spicher Kasdorf and Steven Rubin's Shale Play: Poems and Photographs from the Fracking Fields

Analyzing The Efficiency Of Horizontal Photovoltaic Cells In Various Climate Regions, Parker A. Hines, Torrey J. Wagner, Clay M. Koschnick, Steven J. Schuldt

Faculty Publications

This research presents the development of linear regression models to predict horizontal photovoltaic power output. We collected a dataset from 14 global Department of Defense (DoD) installations over a timeframe of one year using an experimental apparatus, resulting in 24,179 usable data points. We developed a linear model to predict power output, which incorporated site-specific weather and geographical characteristics, along with Köppen-Geiger climate classifications in order to determine the effect of adding climate to the model. After performing a Wald test between the full model and a reduced model without Köppen-Geiger climate variables, it was determined that including Köppen-Geiger climate …

Seamless Lidar Surveys Reveal Rates And Patterns Of Subsidence In The Mississippi River Delta, Celeste E. Woock

University of New Orleans Theses and Dissertations

Light Detection and Ranging (Lidar) data are used to report the temporal and spatial patterns of subsidence as well as the potential contributors to subsidence within the Barataria and Terrebonne Bays. In recent decades, subsidence in southeast Louisiana has become a topic of substantial and growing concern to the scientific community, the local residents, and all those invested in the region. Lidar data were acquired from the United States Geological Survey (USGS) and the LSU Center for Geoinformatics. The data has been manipulated to map the differenced Lidar, complete an instantaneous slope analysis, and determine the thickness of the Holocene …

An Integrated Resource Plan For Public Service Company Of Colorado (Psco), Rawley Loken, Alex Smith

Master of Science in Energy Systems Management

An Integrated Resource Plan (IRP) is a tool used by load serving entities (LSEs) to plan how they will meet forecasted energy demand and system reliability requirements through a combination of supply-side and demand-side resources. The goal of an IRP is to identify the lowest cost option to meet future load while also adhering to policy requirements. For Public Service Company of Colorado’s (PSCo) IRP process, a suite of generating resources, storage capacity, and demand-side management programs are all considered when developing a plan that meets state and utility regulatory requirements and environmental targets.

In 2016, PSCo’s system peak demand …

Enabling Electric Storage Participation In Wholesale Markets: An Analysis Of Ferc Order No. 841, Glenn A. Smith

Master of Science in Energy Systems Management

This study has been performed to understand the potential impact that the Federal Energy Regulatory Commission’s (FERC) Order No. 841 will have on the adoption of energy storage resources (ESR). This analysis looked at: (1) the Order’s requirements, (2) FERC’s exercise of its authorized jurisdiction within the Order, and (3) actions taken by the Regional Transmission Organizations (RTO), Independent System Operators (ISO) and FERC to demonstrate compliance with the Order’s requirements:

Order No. 841 utilizes a participation model to ensure ESR’s are able to participate in wholesale electricity markets to an extent that is reflective of a resource’s physical and …

Enabling Electric Storage Participation In Wholesale Markets: An Analysis Of Ferc Order No. 841, Glenn A. Smith

Master's Projects and Capstones

This study has been performed to understand the potential impact that the Federal Energy Regulatory Commission’s (FERC) Order No. 841 will have on the adoption of energy storage resources (ESR). This analysis looked at: (1) the Order’s requirements, (2) FERC’s exercise of its authorized jurisdiction within the Order, and (3) actions taken by the Regional Transmission Organizations (RTO), Independent System Operators (ISO) and FERC to demonstrate compliance with the Order’s requirements:

Order No. 841 utilizes a participation model to ensure ESR’s are able to participate in wholesale electricity markets to an extent that is reflective of a resource’s physical and …

An Integrated Resource Plan For Public Service Company Of Colorado (Psco), Rawley Loken, Alex Smith

Master's Projects and Capstones

An Integrated Resource Plan (IRP) is a tool used by load serving entities (LSEs) to plan how they will meet forecasted energy demand and system reliability requirements through a combination of supply-side and demand-side resources. The goal of an IRP is to identify the lowest cost option to meet future load while also adhering to policy requirements. For Public Service Company of Colorado’s (PSCo) IRP process, a suite of generating resources, storage capacity, and demand-side management programs are all considered when developing a plan that meets state and utility regulatory requirements and environmental targets.

In 2016, PSCo’s system peak demand …

An In-Situ Study Of The Aqueous Speciation Of Uranium (Vi) Under Hydrothermal Conditions, Diwash Dhakal

Graduate Theses/Dissertations

Rigorous study of the speciation distribution of uranyl-chloride bearing solutions under hydrothermal conditions is important to understand the transport mechanism of uranium underground, which is of uttermost interest to parties studying the geological uranium deposits and those studying the possibilities of geological repositories for spent nuclear waste. I report an in-situ Raman spectroscopic study of the speciation distribution of aqueous uranyl-chloride complexes upto 500°C conducted using a HDAC as the high PT spectroscopic cell. The samples studied contained the species UO₂²⁺, UO₂Cl⁺, UO₂Cl₂⁰ and UO₂Cl₃^{- …}

Using Numerical Models Of Dewatering At Coal Ash Impoundments To Understand Cost And Schedule, Peter Bell, Joel Thompson, Don Fuller

World of Coal Ash Proceedings

No abstract provided.

Investigating Ccr Units And Evaluating The Physical Properties Of Ponded Ccr, David Skeggs, Zahra Aghazadeh, Rachel Combs

World of Coal Ash Proceedings

No abstract provided.

Demonstration Of “No Migration” Alternative Performance Standard For Ccr Facilities In Arid To Semi- Arid Regions Using Unsaturated Zone Modeling, James Aiken, Katy Lindstom

World of Coal Ash Proceedings

No abstract provided.

Coal Combustion Residuals Management Using Geotextile Containers- Considerations For Various Options, Randall Wilcox, Gregg Lebster, Bryan Hamilton, Thomas Stephens

World of Coal Ash Proceedings

No abstract provided.

State Vs Federal Ccr Rule Regulations: Comparisons And Impacts, Nicole Kron, Eric Nelson

World of Coal Ash Proceedings

No abstract provided.

Continuous, Real-Time Tss Monitoring Verifies Effluent Quality And Coal Ash Management Performance While Reducing Compliance Costs, Dave Fraley, Chris Bauman, Dave Donahue

World of Coal Ash Proceedings

No abstract provided.

Advantages Of Single Source Contracting In-Plant Ccr Services, Kevin Foody, Marcella Funderburg, Blake Whittington

World of Coal Ash Proceedings

No abstract provided.

Effect Of Coal Fly Ash On Agricultural Crops :Second Phase Showcase Project On Use Of Fly Ash In Agriculture In And Around Thermal Power Station Areas Of National Thermal Power Corporation Ltd., India., K. Arivazhagan, M. Ravichandran, S.K. Dube, V.K. Mathur

World of Coal Ash Proceedings

No abstract provided.

Design And Construction Of A Ccr Landfill Adjacent To The Missouri River, Thomas Gredell, Jeffrey Fouse, Jay Ellington

World of Coal Ash Proceedings

No abstract provided.