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2023

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Articles 151 - 180 of 367

Full-Text Articles in Oil, Gas, and Energy

Applicability Evaluation Technology Of Perforating Parameters In Different Reservoirs, Bi Gang, Wu Jiemin, Yang Shangyu, Li Mengmeng, Han Fei, Wang Xin, Cui Ying Jul 2023

Applicability Evaluation Technology Of Perforating Parameters In Different Reservoirs, Bi Gang, Wu Jiemin, Yang Shangyu, Li Mengmeng, Han Fei, Wang Xin, Cui Ying

Coal Geology & Exploration

Perforating parameters have an important impact on the productivity of oil and gas wells. Currently, the optimization of perforating parameters is mostly based on single factor analysis, with no multi-factor comprehensive evaluation analysis performed. In this paper, the finite element simulation method was used to analyze and study the influence law of perforating parameters on wellhead flow under different reservoir conditions. Firstly, a geometric model of pressure drop in reservoir with perforation completion was established to simulate the fluid flow after perforation. In this way, the influence laws of perforating parameters, anisotropy parameters and natural fracture parameters on the pressure …

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Construction And Restoration Technology Of Terrain Remodeling Layer In The Restoration Of Ecological Geological Layer In Open-Pit Mining Areas, Zhao Xin, Wang Tong, Li Congcong, Lin Zhongyue, Li Fei, Wang Weichao, Feng Kangning, Yin Yalei, Jiang Zhe Jul 2023

Construction And Restoration Technology Of Terrain Remodeling Layer In The Restoration Of Ecological Geological Layer In Open-Pit Mining Areas, Zhao Xin, Wang Tong, Li Congcong, Lin Zhongyue, Li Fei, Wang Weichao, Feng Kangning, Yin Yalei, Jiang Zhe

Coal Geology & Exploration

Mining can easily result in a series of change in the geomorphic form, such as irregular mining pits, high and steep slopes, slag hills, primitive soil failure and accumulated water in mining pits in the plateau and alpine mining area, which is in disharmony with the surrounding environment. Such changes of geomorphic form will not only adversely affect the surface ecological environment, but also bring different degrees of influence and damage to the shallow groundwater seepage field and the permafrost. In particular, the geological hazards and disasters such as landslides and collapses may even be resulted in. In response to …

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Uav Aerial Triangulation: Point Error Distributions And The Influencing Mechanisms Of Ground Control Points On Its Accuracy, Zha Jianfeng, Zhu Pengcheng, Wu Dejun, Ma Chenyang, Zhong Chongwu, Yin Hongwu, Wang Dong Jul 2023

Uav Aerial Triangulation: Point Error Distributions And The Influencing Mechanisms Of Ground Control Points On Its Accuracy, Zha Jianfeng, Zhu Pengcheng, Wu Dejun, Ma Chenyang, Zhong Chongwu, Yin Hongwu, Wang Dong

Coal Geology & Exploration

Unmanned aerial vehicles (UAVs) have been an important means of monitoring the surface deformation in mining areas since they are flexible, are insensitive to weather, and can swiftly acquire images of target areas. However, there is an urgent need to improve UAV-based measurement accuracy. Based on a systematic analysis of factors affecting the accuracy of surface measurement points, this study focuses on the influence of the quality of ground control points on the point error distribution and accuracy of aerial triangulation. Firstly, through a large number of repeated observations and experiments, this study investigated the error distributions of the planar …

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Table Of Contents, The Editors Jul 2023

Table Of Contents, The Editors

Coal Geology & Exploration

No abstract provided.

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Research Advances On The Techno-Economic Evaluation Of Ucg Projects, Yi Tongsheng, Qin Yong, Zhou Yongfeng, Wang Lingxia, Jin Jun, Zhou Ze Jul 2023

Research Advances On The Techno-Economic Evaluation Of Ucg Projects, Yi Tongsheng, Qin Yong, Zhou Yongfeng, Wang Lingxia, Jin Jun, Zhou Ze

Coal Geology & Exploration

Underground coal gasification (UCG) is driven by China's development strategy for a clean and efficient coal energy structure. Its industrialization prospect depends on the economic and social benefits of UCG projects. Against this background, this study reviews the research advances on the economic evaluation of UCG projects at home and abroad and summarizes the current insights into the economic competitiveness of UCG projects. Through case analysis, it presents a basic model for the economic evaluation of the UCG-combined-cycle gas turbine (CCGT) - carbon capture and storage (UCG-CCGT-CCS) system and the main understanding of the model. Furthermore, this study discusses the …

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Ucg Industrialization In The Soviet Union: History And Comments, Kong Weimin, Zhou Yongfeng, Yi Tongsheng, Li Ping, Qin Yong, Zhou Ze Jul 2023

Ucg Industrialization In The Soviet Union: History And Comments, Kong Weimin, Zhou Yongfeng, Yi Tongsheng, Li Ping, Qin Yong, Zhou Ze

Coal Geology & Exploration

China's energy resources are originally poor in oil and gas but rich in coal. The industrialization of underground coal gasification (UCG) technologies, which is an important way of achieving a low-carbon and efficient coal energy structure in China, contributes to the smooth achievement of the peak carbon dioxide emissions and carbon neutrality in China. This study reviews the history of the field tests and industrialization of UCG technologies in the Soviet Union by systematically referencing and sorting literature, aiming to provide a reference for the present development and industrialization of UCG technologies in China. The results show that the development …

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Ucg Pilot Tests In The United States And Their Contributions To Modern Ucg Technologies, Huang Wan, Wang Jun, Wang Lingxia, Yi Tongsheng, Chen Kexin, Qin Yong Jul 2023

Ucg Pilot Tests In The United States And Their Contributions To Modern Ucg Technologies, Huang Wan, Wang Jun, Wang Lingxia, Yi Tongsheng, Chen Kexin, Qin Yong

Coal Geology & Exploration

The industrialization of underground coal gasification (UCG), which is conducive to the transformation and development of the coal energy structure and the improvement in the low-carbon utilization level of coal resources, is an environmentally friendly energy development technology in line with the sustainable development strategy. The international energy crisis from the 1980s to the 1990s prompted the United States to vigorously develop UCG technologies. Accordingly, this country has successively carried out six series of UCG pilot tests, which contribute greatly to the progress in UCG technologies and provided the critical foundation for the formation of modern UCG technologies worldwide. This …

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Ucg Pilot Tests In Eu Countries: A Review Of History And Progress, Jin Lili, Yang Lei, Wu Yarong, Wang Xiaofang, Yi Tongsheng, Qin Yong Jul 2023

Ucg Pilot Tests In Eu Countries: A Review Of History And Progress, Jin Lili, Yang Lei, Wu Yarong, Wang Xiaofang, Yi Tongsheng, Qin Yong

Coal Geology & Exploration

Underground coal gasification (UCG) is an important way of transforming China’s coal energy structure. European Union (EU) countries explored UCG for over 80 years, and their rich experience can be used as a reference for promoting UCG industrialization in China. The UK prepared for UCG pilot tests for the first time in the world. From 1944 to 2014, based on the experience of the former Soviet Union and the United States, EU countries successively implemented at least 12 UCG pilot test projects in three stages, making important contributions to the progress in UCG technologies. They invented the blind-hole method and …

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Ucg Engineering Demonstrations In Australia: History And Its Implications, Zhou Ze, Wang Lingxia, Qin Yong, Jin Jun, Yang Lei, Yi Tongsheng Jul 2023

Ucg Engineering Demonstrations In Australia: History And Its Implications, Zhou Ze, Wang Lingxia, Qin Yong, Jin Jun, Yang Lei, Yi Tongsheng

Coal Geology & Exploration

Underground coal gasification (UCG), which is a revolutionary coal mining technology, is an important direction for achieving a low-carbon and efficient coal energy structure in China and is also a potential explorable way to ensure the smooth realization of the peak carbon dioxide emissions and carbon neutrality in China. Based on a literature survey, this study sorts out the exploration process of UCG technologies in Australia and analyzes the gains and losses using field test cases. The experience in UCG technologies in Australia can provide a reference for the development of the technologies in China. The results show that the …

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A New Type Of Ordovician Limestone Karst Water Inrush From The Floor Of Old Goaf: Formation Mechanism And The Prevention And Control Technology, Zhou Shuai, Li Shuqian, Yin Shangxian, Liang Manyu, Meng Haopeng, Qi Rongrong, Li Yuanyuan Jul 2023

A New Type Of Ordovician Limestone Karst Water Inrush From The Floor Of Old Goaf: Formation Mechanism And The Prevention And Control Technology, Zhou Shuai, Li Shuqian, Yin Shangxian, Liang Manyu, Meng Haopeng, Qi Rongrong, Li Yuanyuan

Coal Geology & Exploration

The Ordovician limestone water inrush accident occurred in the small coal-pit area in Xin’an Mine of Hebei Fengfeng mining area on October 25th, which resulted in the production level being flooded, with the coal mine shut-down. Specifically, the accident cause was analyzed, and the concept of Ordovician limestone karst water inrush from the floor of old goaf was proposed, with its difference from the connotation and denotation of water inrush from the old goaf or floor water inrush accidents induced by mining summarized. Then, the water inrush mechanism based on the dynamic evolution of stored energy release from …

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Research And Application Of Fracture Mechanics Model Of Stope Roof Under The Coupling Of Direct Roof And Basic Roof, Li Jinhua, Zheng Chengxian, Gu Shuancheng, Wu Baolin, Wang Xiong, Song Yongjun Jul 2023

Research And Application Of Fracture Mechanics Model Of Stope Roof Under The Coupling Of Direct Roof And Basic Roof, Li Jinhua, Zheng Chengxian, Gu Shuancheng, Wu Baolin, Wang Xiong, Song Yongjun

Coal Geology & Exploration

Periodic weighting is a typical characteristic of mine pressure. Accurate prediction of stope periodic weighting step is an important way to effectively reduce the occurrence of stope accidents. Aiming at the influence of the coupling between the basic roof defects and the direct roof on the periodic weighting step, the stope roof was regarded as a finite plate model with cracks. According to the coordinate deformation mechanism of the overburden rock, the fracture mechanics model of the stope roof was established based on the fracture mechanics theory. On this basis, the periodic weighting step function under the coupling between the …

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Material Point Method-Based Simulation And Dynamic Characteristic Analysis Of Instability-Induced Landslide Movement: A Case Study Of The Yanguan Landslide In The Three Gorges Reservoir Area, Song Kun, Ruan Di, Lyu Honglin, Han Luyang, Huang Haifeng Jul 2023

Material Point Method-Based Simulation And Dynamic Characteristic Analysis Of Instability-Induced Landslide Movement: A Case Study Of The Yanguan Landslide In The Three Gorges Reservoir Area, Song Kun, Ruan Di, Lyu Honglin, Han Luyang, Huang Haifeng

Coal Geology & Exploration

The dynamic process and influence range of instability-induced landslide movement have important effects on the risk area division and prevention of landslide hazards. To accurately and systematically analyze the changes in the dynamic characteristics of landsides during their instability-induced movement, this study thoroughly investigated and analyzed the instability-induced movement process of the Yanguan landslide in the Three Gorges Reservoir area, Zigui County, Hubei Province. Through laboratory ring shear tests, this study determined the changing pattern of residual strength and the motion parameters of sliding zone soil under different shear rates. Accordingly, using the material point method (MPM), which is suitable …

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Detection Of Near-Surface Cavities Using The 2d Multi-Parameter Full-Waveform Inversion Of Rayleigh Waves, Li Yu, Wang Jingqi, Guan Jianbo, Yan Yingwei Jul 2023

Detection Of Near-Surface Cavities Using The 2d Multi-Parameter Full-Waveform Inversion Of Rayleigh Waves, Li Yu, Wang Jingqi, Guan Jianbo, Yan Yingwei

Coal Geology & Exploration

The accurate detection of near-surface low-velocity anomalies (such as cavities), which has always been a valuable and challenging research topic in the field of geophysics, holds great significance for the fine-scale near-surface modeling in urban disaster assessment and the seismic exploration of coalfields under complex conditions. The full-waveform inversion (FWI) of surface waves is suitable for high-precision near-surface modeling. However, there still exist many urgent problems with the modeling in practical applications. To solve the key issues of the FWI of surface waves, such as multi-parameter crosstalk, actual data preprocessing, and source wavelet estimation, this study developed a complete method …

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A Method For Suppressing Casing Coupling Noise In Vsp Data Based On Morphological Component Analysis Of Characteristic Waves, Pan Long, Mao Haibo, Jiang Li, Hu Keyang, Dang Zhimin, Chen Wenchao Jul 2023

A Method For Suppressing Casing Coupling Noise In Vsp Data Based On Morphological Component Analysis Of Characteristic Waves, Pan Long, Mao Haibo, Jiang Li, Hu Keyang, Dang Zhimin, Chen Wenchao

Coal Geology & Exploration

During the acquisition of vertical seismic profile (VSP) data, coupling noise between casing strings frequently emerges due to poor well cementing or the presence of cement annulus between multiple casing layers. This type of noise features high energy, a wide spatial influence range, and slow attenuation. Furthermore, it overlaps effective signals in multiple domains, such as the time and frequency domains. Therefore, casing coupling noise severely affects the signal-to-noise ratio of VSP data. This study first introduces the basic theory of Morphological Component Analysis (MCA). Then, it conducts a comparative analysis of the distribution of effective signals and casing coupling …

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Influence Of High In-Situ Stress Areas In The Coal Seam Roofs On Microseism-Based Tomographic Inversion, Liu Kaihang, Feng Lei, Yun Meihou, Cao Yunxing, Tian Lin Jul 2023

Influence Of High In-Situ Stress Areas In The Coal Seam Roofs On Microseism-Based Tomographic Inversion, Liu Kaihang, Feng Lei, Yun Meihou, Cao Yunxing, Tian Lin

Coal Geology & Exploration

High in-situ stress areas in the coal seam roofs are prone to induce mine dynamic hazard such as rock bursts. To meet the demand for safe coal mining, this study achieved real-time monitoring and swift early warning of high in situ stress areas. Specifically, based on data transmitted from microseismic stations in real time, this study conducted the inversion of the wave velocities in coal seams and rocks using a fast three-dimensional (3D) tomographic inversion algorithm. The accuracy of tomographic inversion results directly determines the judgment on the locations of high in situ stress areas. Therefore, by building a 3D …

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Bring On The Heat, Renée Stoute Jul 2023

Bring On The Heat, Renée Stoute

The Journal of International Relations, Peace Studies, and Development

According to the World Economic Forum, in retaliation to European Union sanctions and embargoes, Russia cut EU gas flows by around 80% between May and October 2022 (WEF, 2022). The EU, in turn, has had to not only reduce energy consumption within the public and private sectors but has also scrambled to find energy alternatives to compensate for its energy shortcomings. However, due to the EU’s rejection of Russian oil and gas, there are now opportunities to embrace more sustainable energy alternatives quicker than previously expected. This could lead to a faster transition towards the use of cleaner and more …

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Influence Of Cutting Parameters On The Performance Of Plough During Hard Rock Cutting In Coal Mining, Sathish Kumar Palaniappan, Moganapriya Chinnasamy, Samir Kumar Pal, Rajasekar Rathanasamy Jul 2023

Influence Of Cutting Parameters On The Performance Of Plough During Hard Rock Cutting In Coal Mining, Sathish Kumar Palaniappan, Moganapriya Chinnasamy, Samir Kumar Pal, Rajasekar Rathanasamy

Journal of Sustainable Mining

Coal ploughs have proved very successful on many faces in various parts of the world. Recently, there has been a general tendency in longwall working to increase the speed at which the machine progresses along the coal face. An increase in production rate demands enhances either due to depth of penetration or cutting speed. This, in turn, results in increasing power demand and also the force acting on an individual pick. To get maximum efficiency from a cutting machine, a number of parameters need to be investigated. The first and foremost thing of interest is naturally the pick geometry. The …

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From Waste To Energy: The Electrochemical Reduction Of Co2 Using Recycled Nanostructured Catalysts, Ibrahim Badawy Jul 2023

From Waste To Energy: The Electrochemical Reduction Of Co2 Using Recycled Nanostructured Catalysts, Ibrahim Badawy

Theses and Dissertations

The reduction of carbon dioxide (CO2RR) using electrochemistry is a promising solution for the burgeoning global energy crisis. The overall vision of its implementation relies on renewable energy sources to power the reaction creating carbon neutral products and effectively closing the carbon cycle. Research in this field has come a long way since its inception in the mid-1900s. However, there remain significant hurdles and important considerations to overcome in order to reach full commercialization. Most electrocatalysts tested for CO2RR have been designed solely for maximum performance while ignoring the environmental consequences if such a material were …

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Geophysical Imprint Of Mining-Induced Rock Mass Deformation In The Area Of Construction Disaster In Bytom (Poland), Andrzej Kotyrba, Łukasz Kortas Jul 2023

Geophysical Imprint Of Mining-Induced Rock Mass Deformation In The Area Of Construction Disaster In Bytom (Poland), Andrzej Kotyrba, Łukasz Kortas

Journal of Sustainable Mining

The paper presents the analysis of the results of geophysical surveys conducted in the mining area located in Bytom – Karb (USCB, Poland) in the aspect of identifying the causes of significant damage to the complex of inhabited tenement houses which occurred in 2011. The surveys were carried out by microgravimetric and GPR methods. The construction disaster was caused by the exploitation of one of the hard coal seams at a depth of about 800 m along the mining longwall running underneath the settlement. The terrain deformation parameters exceeded the forecasted values, and in several places discontinuities took linear forms …

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The Causal Links Between Urbanization, Energy Use And Carbon Emissions: A Case Of Sadc Region, Pendo T Kivyiro Jun 2023

The Causal Links Between Urbanization, Energy Use And Carbon Emissions: A Case Of Sadc Region, Pendo T Kivyiro

Tanzania Journal of Science

The study aimed at examining the causal links between urbanization, energy consumption and carbon emissions in the case of selected SADC countries. The study employed annual time series data spanning from 1988 to 2020 extracted from the World Bank Development indicator Databank. A Pedroni cointegration test was employed to test whether the variables of interest move together in the long run. Granger causality backed with Full Modified Ordinary Least Squares (FMOLS) was used to detect the direction and the nature of causality among the variables of interest. The results from Pedroni cointegration test revealed that the variables move together in …

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Status And Prospects Of Fully Mechanized Mining Technology In Vietnam Coal Mines From 2005 To 2020, Hai Duong Duc, Quang Dao Hong, Viet Phan Van, Thang Ngo Van Jun 2023

Status And Prospects Of Fully Mechanized Mining Technology In Vietnam Coal Mines From 2005 To 2020, Hai Duong Duc, Quang Dao Hong, Viet Phan Van, Thang Ngo Van

Journal of Sustainable Mining

This paper analyzes the achievement and the failures of applying the mechanized mining method in underground coal mines by the Vietnam National Coal – Mineral Industries Holding Corporation Ltd. (VINACOMIN) for 15 years (from 2005 to 2020). It also proposes the recommendations for developing mechanized mining in order to improve coal production, productivity and safety management for the sustainable development of Vietnam’s underground coal mining in the period 2021-2025

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Evaluating The Impacts Of The Transition From Open-Pit To Underground Mining On Sustainable Development Indexes, Naser Badakhshan, Kourosh Shahriar, Sajjad Afraei, Ezzeddin Bakhtavar Jun 2023

Evaluating The Impacts Of The Transition From Open-Pit To Underground Mining On Sustainable Development Indexes, Naser Badakhshan, Kourosh Shahriar, Sajjad Afraei, Ezzeddin Bakhtavar

Journal of Sustainable Mining

Sustainable development is about creating a balance between development and environment, and it consists of three essential principles: environment, society, and economy. Today, one of the most important challenges in deep open pit mines is the transition from open pit to underground, which has positive and negative impacts on sustainable development indexes. In order to reduce these adverse impacts, the impact of various parts of the transition operation on these indexes should be evaluated and corrective and preventive measures should be implemented. In this study, using a hybrid semi-quantitative approach, the effects of the transition in the Songun copper mine …

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Applications Of Uavs In Mine Industry: A Scoping Review, Dang Tuyet Minh, Nguyen Ba Dung Jun 2023

Applications Of Uavs In Mine Industry: A Scoping Review, Dang Tuyet Minh, Nguyen Ba Dung

Journal of Sustainable Mining

In recent years, a variety of technologies have improved mining operations. One of them is the Unmanned Aerial Vehicles (UAVs), the emerging technology that has been changing the mining process, boosting mining safety and productivity. The main purpose of this paper is to review the applications of UAVs in the mining industry based on the results of 113 research papers over the past twelve years, from 2010 to May 2022. The potential applications of UAVs in the mining industry are broad. Based on the paper identified, eight categories are used to classify UAV applications in the mining sector. The reviewed …

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Table Of Contents, The Editors Jun 2023

Table Of Contents, The Editors

Coal Geology & Exploration

No abstract provided.

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Preparation And Properties Of Acrylate Grouting Material Used In Coal Mine, Zeng Juanjuan, Li Huizhi, Wei Daidong, Xue Wei, Zhu Kaipeng Jun 2023

Preparation And Properties Of Acrylate Grouting Material Used In Coal Mine, Zeng Juanjuan, Li Huizhi, Wei Daidong, Xue Wei, Zhu Kaipeng

Coal Geology & Exploration

Water leakage control on the coal mine roof is an inevitable challenge in the process of coal mining. In this regard, chemical grouting provides an effective method to solve this problem. Specifically, acrylate grouting materials were prepared using the synthesized magnesium acrylate solution, cross-linking agent, initiator, and accelerator as the raw materials. Based on this, the effects of the concentration of magnesium acrylates, the type and dosage of crosslinking agent and the dosage of initiator on the properties of the gels of the acrylate grouting materials were investigated. The test results indicate that the type and dosage of crosslinking agent …

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Current Situation And Development Trend Of Pressure-Relief Gas Extraction In The Protective Layer Mining In Coal Mines In China, Xue Junhua, Xiao Jian, Du Xuanhong, Shi Yu Jun 2023

Current Situation And Development Trend Of Pressure-Relief Gas Extraction In The Protective Layer Mining In Coal Mines In China, Xue Junhua, Xiao Jian, Du Xuanhong, Shi Yu

Coal Geology & Exploration

Deep coal mining in China is seriously restricted by factors including high stress, high gas pressure, and low coal seam permeability. Moreover, with the gradual deterioration of the mining conditions of deep coal seams, it is increasingly difficult to control the gas in these coal seams. Fortunately, the pressure-relief mining of protective layers serves as an efficient way to control gas and eliminate coal and gas outbursts. To meet the demand of practical projects, this paper reviews the studies on the mining technology for protective layers, the law of change in the stress of protected layers, the evolutionary law of …

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Recharge Water Types Of Coalbed Methane Wells: Controlling Effects On Water Yield And Countermeasures, Du Fengfeng, Ni Xiaoming, Zhang Yafei, Liu Yuru, Wang Wensheng Jun 2023

Recharge Water Types Of Coalbed Methane Wells: Controlling Effects On Water Yield And Countermeasures, Du Fengfeng, Ni Xiaoming, Zhang Yafei, Liu Yuru, Wang Wensheng

Coal Geology & Exploration

External water recharge of coalbed methane (CBM) wells leads to high water yield, thus affecting effective pressure propagation within coal seams and ultimately impacting gas production. This study aims to ascertain the influence of different types of recharge water on the water yield of CBM wells, as well as the characteristics of water yield and gas production of these wells under different recharge water types. Based on the exploration and development data of 25 CBM wells in the Shouyang block, this study presented general methods for obtaining the parameters for recharge water type classification and proposed the stepped method for …

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Effects Of Increasing Sintering Pressure On The Performance Of Impregnated Diamond Bit, Yang Zhan, Tan Songcheng, Fang Xiaohong, Yang Kaihua Jun 2023

Effects Of Increasing Sintering Pressure On The Performance Of Impregnated Diamond Bit, Yang Zhan, Tan Songcheng, Fang Xiaohong, Yang Kaihua

Coal Geology & Exploration

The matrix formulas of conventional hot-pressed impregnated diamond bits are mostly elemental metal systems, using WC or YG8 as the skeleton materials, Cu alloys as the bonding materials, and Ni, Co, Fe and Mn as the intermediate materials. Due to the compositions and contents of the bonding and skeleton materials in the formulas, the suitable sintering pressure is limited (≤16 MPa), while the sintering temperature is relatively high (≥ 930℃), resulting in a lower relative ratio of the actual and theoretical densities (≤98%) for the diamond bit matrix. However, the high sintering temperature will cause thermal damage to the diamonds, …

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Design And Application Of Anti-Drop Drill Pipe With Fracture Self-Locking Function, Dong Changle Jun 2023

Design And Application Of Anti-Drop Drill Pipe With Fracture Self-Locking Function, Dong Changle

Coal Geology & Exploration

Drill pipe will inevitably break and drop during its long-term service, which not only seriously affects the drilling efficiency and the rate of hole formation, but also brings great economic losses to coal mines. In terms of drill pipe drop caused by the random fracture during drilling, the shortcomings of fishing tap were pointed out. By analyzing the fracture characteristics of drill pipe, it is concluded that the key to solve the problem of drill pipe drop is to develop the axial connection technology after the fracture of pin joint. Herein, an active anti-drop technology with fracture self-locking function was …

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Experimental Study On Co2 Storage In Coal Measure Gas Hydrates Reservoirs In Muli Coalfield, Lyu Wenyu, Lyu Chao, Zhang Wenzhong, Sun Qiang, Jia Hailiang, Tang Li'an Jun 2023

Experimental Study On Co2 Storage In Coal Measure Gas Hydrates Reservoirs In Muli Coalfield, Lyu Wenyu, Lyu Chao, Zhang Wenzhong, Sun Qiang, Jia Hailiang, Tang Li'an

Coal Geology & Exploration

Carbon Dioxide Geological Storage (CGS) is a promising technology for reducing the greenhouse gas emissions and mitigating the climate change. The hydrate-based CO2 storage in the abandoned gas hydrate reservoir can play a key role in CGS. In this paper, artificial cores of hydrate reservoir were prepared based on the basic physical properties of coal measure gas hydrate reservoir in Muli Coalfield, and the variations in density, porosity and permeability of the core with particle diameter of quartz sand were analyzed. The variations in CO2 hydrate saturation in core were analyzed based on the low-field Nuclear Magnetic Resonance …

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