Hasil untuk "Gas industry"

JIANG Yong, LUO Xianbo, ZHANG Qixuan, WU Jintao, YANG Chenxu

The BZ condensate gas reservoir in the Bohai Sea, China, is a rare fractured buried hill condensate gas reservoir with high saturation and high content of condensate oil. The reservoir features high temperature, high pressure, ultra-low porosity, and ultra-low permeability. Due to the small difference between the fluid dew point and the pressure in the gas reservoir, it is prone to condensate oil precipitation, causing contamination in the near-wellbore zone. In the early development stage, the BZ gas reservoir pilot area was produced using natural energy. When the reservoir pressure drops below the dew point, retrograde condensation intensifies, leading to a rapid increase in the gas-oil ratio and an accelerated decline in production. Therefore, there is an urgent need for the evaluation of retrograde condensation damage and effective remediation methods. Core depletion experiments were conducted under high-temperature and high-pressure conditions using compound condensate gas to simulate retrograde condensate oil contamination. Gas-phase permeability was tested at different depletion pressure points to evaluate the degree of retrograde condensate contamination. Additionally, gas injection experiments were carried out to investigate the mechanisms of damage mitigation. Experimental results showed that as the reservoir pressure decreased, the amount of retrograde condensate in the core increased, and the effective gas-phase permeability decreased significantly. Ultimately, the resulting retrograde condensate damage to the reservoir reached 65.8% to 70.2%. Gas injection could reduce the viscosity of condensate oil, increase the volume expansion coefficient of reservoir fluids, and induce re-vaporization of retrograde condensate oil. This process reduced the amount and saturation of retrograde condensate liquid, relieved retrograde condensate blockage, and improved the effective gas-phase permeability of reservoir cores. The permeability recovery rates for N2, associated gas, and CO2 were 48.1%, 78.6%, and 81.7%, respectively. The final recovery rates for condensate oil reached 43.7%, 66.8%, and 69.2%, respectively. The research results provide technical support for gas injection development in the pilot zone of the BZ buried hill condensate gas reservoir. This approach effectively mitigates production decline and achieves good results, offering important guidance for the efficient large-scale gas injection development in the future.

QI HUAIYAN, YANG GUOBIN, ZHU YADI et al.

Imbibition plays a crucial role in waterflood development and the soaking stage after fracturing in tight oil reservoirs, serving as an effective method to enhance oil recovery. To investigate the effects of complex pore structures and rock-fluid interactions on imbibition mechanisms in tight reservoirs, this study combined nuclear magnetic resonance (NMR) technology with pore-scale imbibition numerical simulation techniques, conducting imbibition experiments and pore-scale imbibition numerical simulations on tight cores with different pore-throat characteristics. In the imbibition experiments, NMR <italic>T</italic>₂ spectra (transverse relaxation time) at different times were monitored in real time, which revealed the dynamic influencing patterns of pore structure on imbibition efficiency. In the pore-scale imbibition numerical simulations, realistic pore-scale physical models of tight sandstone were constructed based on thin sections, and the pore-scale imbibition process of tight sandstone was simulated by solving the Navier-Stokes equations combined with the phase field method. Based on the mutual verification of experimental and simulation results, the effects of contact angle, crude oil viscosity, and reservoir physical properties on imbibition efficiency were analyzed in detail. The results showed that the pore-scale imbibition numerical simulation results were in good agreement with the experimental data. The complexity of the pore structures significantly affected the oil displacement characteristics of imbibition, showing a relatively fast imbibition rate that gradually decreased with the extension of imbibition time. The aqueous phase preferentially entered smaller pores and then displaced the oil phase in larger pores. The smaller the contact angle resulting from rock-fluid interaction (i.e., the stronger the hydrophilicity of the rock), the greater the oil-water displacement driving force in the imbibition process and the higher the imbibition efficiency. In addition, a lower oil-water viscosity ratio and lower core permeability both generated stronger imbibition driving force. The research findings deepen the understanding of imbibition mechanisms in tight oil reservoirs at the microscopic level and provide theoretical foundation and experimental support for improving the development efficiency of tight oil reservoirs.

Duihong Zhang, Ruoxi Wang, Xin Ouyang et al.

Carbon Capture, Utilization and Storage (CCUS) is an important strategic reserve technology to reduce CO2 emissions. Accelerating the application and development of CCUS technology is a realistic need and an important path for the energy industry to achieve the goal of carbon peak and carbon neutrality. It is the most economical method to transport CO2 from carbon source to carbon sink in supercritical state through pipeline. The key issue of supercritical/dense phase CO2 pipeline design is whether the pipeline steel has an adequate toughness to arrest running ductile fracture. For the study of toughness requirements of pipeline, full-scale burst test is the most direct and effective method at present. In order to research the toughness requirements of the supercritical CO2 pipeline, the first full-scale burst test of CO2 pipeline in China was carried out. The X65 steel pipeline with an outer diameter of 323.9 mm and a wall thickness of 7.2–7.6 mm was used as the test pipe. The test gas was 95% CO2 + 4% N2 + 1% H2, the test pressure was 11.85 MPa, and the temperature was 12.6 °C. The test results show that the axial prefabricated crack of the crack initiation pipe was successfully detonated and the crack propagated along the axial direction. On the west side, the crack was arrested at the girth weld of the two pipelines, and on the east side the crack was arrested ductilely because the base metal of the pipeline had sufficient toughness. The test steel pipe showed typical ductile shear fracture characteristics. The data of crack propagation velocity, pressure and temperature were collected, and the test results were accurate. After the burst of the pipe, the high-pressure gas in the pipe was sprayed upward and out in the opposite direction of the wind direction, and then diffused along the wind direction to the external field under the action of the wind velocity. This test provides data support for China to master the development, pipeline design and construction technology of million-ton CO2 pipeline. The test results will significantly improve the prediction accuracy of crack arrest toughness of CO2 pipeline of China, and provide important technical support for the safe construction and operation of global CO2 pipeline.

Prashant Dhote, Uday Bhan

The oil and gas industry relies heavily on inverse geostatistical modeling to predict static reservoir properties that influence hydrocarbon accumulation and flow. However, these methods face significant challenges due to sparse sampling and the inability to capture reservoir variability beyond boreholes. Geostatistical techniques typically depend on borehole data, which represent only a small fraction of the total reservoir volume. The large distances between boreholes further hinder the ability to achieve reliable and accurate predictions. An innovative approach in numerical forward modeling, the stratigraphic-structural forward modeling (SSFM) technique, offers an alternative or complementary workflow for modeling facies and property distribution in static reservoir models. The SSFM quantitatively integrates sedimentation and deformation processes in basins, grounded in the physics of basin formation, infill, and sedimentary architecture. By translating conceptual geological models into cellular geological volumes, SSFM requires minimal borehole and seismic data for validation. This review traces the historical evolution of various numerical techniques, with particular emphasis on the advancements and limitations of SSFM. However, these limitations present opportunities for guiding future research, fostering development in the field, and extending the application of SSFM techniques beyond hydrocarbon exploration. Understanding and addressing SSFM’s limitations is essential to optimizing and enhancing its effectiveness within the industry.

Hesamedin Ayati, Homam Naffakh-Moosavy

In this study, the laser surface melting of cobalt-based superalloy ECY768, which has been in service for 40,000 h at a temperature of 1000 °C, has been investigated. Subsequently, laser surface welding and post-welding heat treatment is performed on the samples. This study was conducted in order to restore the microstructure of the damaged service-aged gas turbine nozzle to as-cast state. The results showed that by performing laser surface remelting, the microstructure of as-cast state can be approached. Also, the results of this study have investigated the weldability, microsegregation and solidification path of this superalloy, and it can be used in the repairing this superalloy in the industry. Laser surface melting was performed using a continuous wave fiber laser at various speeds of 10, 12, 14, 20, 50, and 70 mm/s. The microstructure and phase characteristics of the samples were examined using optical and scanning electron microscopes. Upon analyzing the macrostructure of the weld metal, it was observed that the depth of the melt zone at the speed of 12 mm/s is 585 ± 40 μm. In the investigating the microstructure of the solidification modes, namely planar, cellular, columnar dendritic, and equiaxed dendritic, it was observed that microsegregation occurs during laser welding of the samples due to the presence of heavy elements such as tantalum and tungsten. The solidification distribution coefficient for tantalum was calculated to be 0.37, which increased to 0.60 after the solution annealing heat treatment, resulting in an improved segregation behavior. Characterizing the surface hardness profiles of laser-melted samples it was observed that the hardness in the melt zone significantly increased compared to the base metal. The results of the current research indicate that the weldability (resistance to various welding defects, especially hot cracks) of the cobalt-based superalloy ECY768 is acceptable, and this process can be used for rejuvenating service-aged ECY768 cobalt-based gas turbine nozzle.

Yilun Zhou, Yinghui Xie, Xiaolu Liu et al.

Removing trace amounts of acetylene (C2H2) from ethylene (C2H4)-rich gas mixtures is vital for the supply of high-purity C2H4 to the chemical industry and plastics sector. However, selective removal of C2H2 is challenging due to the similar physical and chemical properties of C2H2 and C2H4. Here, we report a “single-molecule trap” strategy that utilizes electrostatic interactions between the one-dimensional (1D) channel of a covalent organic framework (denoted as COF-1) and C2H2 molecules to massively enhance the adsorption selectivity toward C2H2 over C2H4. C2H2 molecules are immobilized via interactions with the O atom of C=O groups, the N atom of C≡N groups, and the H atom of phenyl groups in 1D channels of COF-1. Due to its exceptionally high affinity for C2H2, COF-1 delivered a remarkable C2H2 uptake of 7.97 cm3/g at 298 K and 0.01 bar, surpassing all reported COFs and many other state-of-the-art adsorbents under similar conditions. Further, COF-1 demonstrated outstanding performance for the separation of C2H2 and C2H4 in breakthrough experiments under dynamic conditions. COF-1 adsorbed C2H2 at a capacity of 0.17 cm3/g at 2,000 s/g when exposed to 0.5 ml/min C2H4-rich gas mixture (99% C2H4) at 298 K, directly producing high-purity C2H4 gas at a rate of 3.95 cm3/g. Computational simulations showed that the strong affinity between C2H2 and the single-molecule traps of COF-1 were responsible for the excellent separation performance. COF-1 is also robust, providing a promising new strategy for the efficient removal of trace amounts of C2H2 in practical C2H4 purification.

Camille Rønn, Andreas Wieland, Christiane Lehrer et al.

BackgroundThe circular economy reshapes the linear “take, make, and dispose” approach and evolves around minimizing waste and recapturing resources in a closed-loop system. The health sector accounts for 4.6% of global greenhouse gas emissions and has, over the decades, been built to rely on single-use devices and deal with high volumes of medical waste. With the increase in the adoption of digital health solutions in the health care industry, leading the industry into a new paradigm of how we provide health care, a focus must be put on the amount of waste that will follow. Digital health solutions will shape health care through the use of technology and lead to improved patient care, but they will also make medical waste more complex to deal with due to the e-waste component. Therefore, a transformation of the health care industry to a circular economy is a crucial cornerstone in decreasing the impact on the environment. ObjectiveThis study aims to address the lack of direction in the current literature on circular business models. It will consider micro, meso, and macro factors that would impact the operational validity of circular models using the digital health solutions ePaper label (medical packaging), smart wearable sensor (health monitoring devices), smart pill box (medication management), and endo-cutter (surgical equipment) as examples. MethodsThe study will systematically perform a scoping review through a database and snowball search. We will analyze and classify the studies from a predetermined set of categories and then summarize them into an evidence map. Based on the review, the study will develop a 2D framework for businesses to follow or for future research to take a standpoint from. ResultsPreliminarily, the review has analyzed 26 studies in total. The results are close to equally distributed among the micro (8/26, 31%), meso (10/26, 38%), and macro (8/26, 31%) levels. Circular economy studies emphasize several circular practices such as recycling (17/26, 65%), reusing (18/26, 69%), reducing (15/26, 58%), and remanufacturing (8/26, 31%). The value proposition in the examined business model is mostly dominated by stand-alone products (18/26, 69%) compared to product as a service (7/26, 27%), involving stakeholders such as health care professionals or hospitals (20/26, 77%), manufacturers (11/26, 42%), and consumers (9/26, 35%). All studies encompass societal (12/26, 46%), economic (23/26, 88%), and environmental (24/26, 92%) viewpoints. ConclusionsThe study argues that each digital health solution would have to be accessed individually to find the optimal business model to follow. This is due to their differing life cycles and complexity. The manufacturer will need a layered value proposition, implementing several business models dependent on their respective product portfolios. The need to incorporate several business models implies an ecosystem perspective that is relevant to consider. International Registered Report Identifier (IRRID)DERR1-10.2196/47874

Cristina Popescu, Andrei Olteanu

The Oil and Gas industry is pursuing major changes in automation, with the aim of reducing the risk involved in operations and increasing efficiency, speeding up processes to reduce costs. Internationally and especially in the Offshore environment, deposits with high productive potential are targeted, which are put into operation through a small number of wells with a high flow rate, due to the complexity of marine drilling. The high costs in this sector of the industry make it necessary to optimize all operational times, thus we very often encounter automation elements in the marine drilling process. This work intends to present the advantages of using the Simulink program package in the simulation of the processes, respectively of the maneuver operation in a drilling installation, to predict their real behavior.

Moupriya Nag, Dibyajit Lahiri, Ankita Dey et al.

In recent times, the seafood industry is found to produce large volumes of waste products comprising shrimp shells, fish bones, fins, skins, intestines, and carcasses, along with the voluminous quantity of wastewater effluents. These seafood industry effluents contain large quantities of lipids, amino acids, proteins, polyunsaturated fatty acids, minerals, and carotenoids mixed with the garbage. This debris not only causes a huge wastage of various nutrients but also roots in severe environmental contamination. Hence, the problem of such seafood industry run-offs needs to be immediately managed with a commercial outlook. Microbiological treatment may lead to the valorization of seafood wastes, the trove of several useful compounds into value-added materials like enzymes, such as lipase, protease, chitinase, hyaluronidase, phosphatase, etc., and organic compounds like bioactive peptides, collagen, gelatin, chitosan, and mineral-based nutraceuticals. Such bioconversion in combination with a bio-refinery strategy possesses the potential for environment-friendly and inexpensive management of discards generated from seafood, which can sustainably maintain the production of seafood. The compounds that are being produced may act as nutritional sources or as nutraceuticals, foods with medicinal value. Determining utilization of seafood discard not only reduces the obnoxious deposition of waste but adds economy in the production of food with nutritional and medicinal importance, and, thereby meets up the long-lasting global demand of making nutrients and nutraceuticals available at a nominal cost.

Adekunle Qudus Adeleke, Waliu Adeniyi Ajibike, Gerry Nkombo Muuka et al.

Organisational internal risk factors, which include management, material, finance, and design risk factors, affect oil and gas construction projects' success in emerging nations, in which Malaysia is no exception. The purpose of this study is to examine the effect of these internal risk factors and government support on oil and gas projects among sixty-one (61) employees of oil and gas firms using a questionnaire survey. The data collected were analysed using structural equation modelling (SEM) techniques. The results revealed that all the exogenous variables (design risk, management risk, financial risk and material risk factors and government support) significantly impact project success. According to the findings, all exogenous variables (design risk, management risk, financial risk, material risk factors, and government support) have substantial effects on project success. The study developed an all-inclusive framework that can assist stakeholders in the industry in mitigating internal risk factors in ensuring the success of projects. Policy implications and future study paths are considered.

Alejandro Fernández Gil, Eduardo Lalla-Ruiz, Mariam Gómez Sánchez et al.

Road freight transport is one of the sectors with the highest greenhouse gas emissions and fuel consumption in the logistics industry. In recent years, due to the increase in carbon dioxide emissions, several companies have considered reducing them in their daily logistics operations by means of better routing management. Green vehicle routing problems (GVRPs) constitute a growing problem direction within the interplay of vehicle routing problems and environmental sustainability that aims to provide effective routes while considering environmental concerns. These NP-hard problems are one of the most studied ones in green logistics, and due to their difficulty, there are many different heuristic and hybrid techniques to solve them under the need of having high-quality solutions within reasonable computational time. Given the role and importance of these methods, this review aims at providing a comprehensive overview of them while reviewing their defining strategies and components. In addition, we analyze characteristics and problem components related to how emissions are being considered. Lastly, we map and analyze the benchmarks proposed so far for the different GVRP variants considering emissions.

Yanqiu Wang, Pengtai Li, Zhiwei Zhu

Abstract In order to seek the optimal growth of China's economy under the premise of natural gas supply safety and air pollution emission constraints, this paper builds a multiobjective optimal allocation model of China's natural gas. The model takes 2012 as the base period, and the simulation period is from 2013 to 2025. Four types of policy combinations are set as variables to be introduced into the model. Lingo is used to simulate the policy combinations under considerations by the model to select the optimal scenario. The dynamic scenario simulation results are as follows: (a) Comparing the simulated data with actual data from 2013 to 2018, we find that the relative error between the simulated results and the actual results is less than 3%, indicating that the constructed multiobjective optimization configuration model is reliable and effective. (b) By 2025, China's natural gas production will be 333.4 billion cubic meters, and its consumption will be 217.1 billion cubic meters. The output will gradually exceed the demand; the proportion of natural gas consumption in the total energy consumption will increase from 5.4% to 7.8%. The proportion has increased significantly; the total GDP is 139 trillion yuan, with an average annual growth rate of 7.5%, and the contribution of the tertiary industry to GDP accounts for 55.8%; (c) China's SO2 emissions from 19.54 million tons in 2013 will be reduced to 12.64 million tons in 2025, China's NOx emissions plummeted from 21.92 million tons in 2013 to 12.59 million tons, and the emission intensity of atmospheric pollutants dropped from 34.0 tons/100 million yuan in 2013 to 9.1 tons/100 million yuan in 2025.

Xin GUO, Xifeng KANG

The main factor of oil tank fire spread should be attributed to the fire's heat radiation. Affected by the heat radiation transferred from the flame of the firing tank, adjacent tanks are easily ignited and may cause a widespread fire in the entire tank farm. In order to study the distribution rule of heat radiation on tank wall when adjacent tanks are exposed to heat radiation, the small-sized experimental device of the heat radiation influence of burning tank on adjacent tank a smallscale experimental device for the influence of tank combustion on the heat radiation of adjacent tanks was established to conduct the experimental study on heat radiation distribution of adjacent tank wall under fire conditions. The experimental results show that under fire conditions, the adjacent tank wall in front of the firing tank is most exposed to radiation. The heat radiation drops gradually from the tank roof to the tank bottom and symmetrically from the center line to both sides. As the L/D(L is the distance between two adjacent oil tanks, and D is the diameter of the oil tank) ratio increases, the heat radiation on the adjacent tank decreases. The experimental data can provide a reference for the heat radiation research of adjacent tanks under fire conditions, and is of great significance for preventing adjacent tanks from being ignited and preventing fire and explosion accidents in tank farm.

Wagner Davel Canal, Ana Márcia Macedo Carvalho, Clarissa Gusmão Figueiró et al.

Abstract The charcoal production when performed in woods with high moisture content negatively impacts the pyrolysis and causes an increase of greenhouse emissions. The aim of this study was to investigate the effects of moisture on the production and quality of charcoal for the pig iron industry. The slow pyrolysis of Eucalyptus sp. was carried out in four different wood moistures, 0, 20, 40 and 60% (dry base). The charcoal and gas yield decreased according to the increase of wood moisture. On the other hand, the bio-oil yield and charcoal friability increased along with the moisture content. The proximate analysis, bulk density and higher heating value of the charcoal were not influenced by the moisture content. The use of wood with moisture content below 20% in the production of charcoal is an alternative to improve productivity, contributing for the economic sustanainability of this sector.

G. A. Schlein, I. I. Kleshchenko, A. A. Baluev et al.

The article deals with innovative technologies for the development and research of oil and gas wells by jet devices in various conditions of occurrence of productive formations. Data are given about the results of work with jet pumps for intensifying the inflows in fields of Western Siberia and about their efficiency to change well productivity. We show development potential of jet pumps and technology in the oil and gas industry to improve the quality of well construction and well operation. Attention is drawn to new technologies and designs of jet pumps, which have been developed for well development, research of two or more reservoirs with the aim of combining them into one production facility. The article gives valuable information on effective technical and technological solutions for well development and stimulation of inflows from reservoirs with abnormally high reservoir pressure. The use of this technique and technology in well development processes allows you to obtain enhanced information about the reservoir properties of productive formations, as well as to increase their productivity.

Somchai Rice, Madina Tursumbayeva, Matthew Clark et al.

The Midwest wine industry has shown a marked increase in growers, hectares planted, wineries, and wine production. This growth coincides with the release of cold-hardy cultivars such as Brianna and Frontenac gris, in 2001 and 2003, respectively. These white grape varieties account for one-third of the total area grown in the state of Iowa. It is generally accepted that the wine aroma profile plays a crucial role in developing a local, sustainable brand. However, the identity of Brianna/Frontenac Gris-based wine aromas and their link to the grape berry chemistry at harvest is unknown. This study aims to preliminarily characterize key odor-active compounds that can influence the aroma profile in wines made from Brianna and Frontenac gris grapes harvested at different stages of ripening. Brianna and Frontenac gris grapes were harvested approximately 7 days apart, starting at 15.4 &deg;Brix (3.09 pH) and 19.5 &deg;Brix (3.00 pH), respectively. Small batch fermentations were made for each time point with all juices adjusted to the same &deg;Brix prior to fermentation. Odor-active compounds were extracted from wine headspace using solid-phase microextraction (SPME) and analyzed by gas chromatography-mass spectrometry (GC-MS) and simultaneous olfactometry (O). Over 30 odor-active compounds were detected. Aromas in Brianna wines developed from &ldquo;cotton candy&rdquo; and &ldquo;floral&rdquo;, to &ldquo;banana&rdquo; and &ldquo;butterscotch&rdquo;, then finally to &ldquo;honey&rdquo;, &ldquo;caramel&rdquo; and an unknown neutral aroma. Frontenac gris wines changed from an unknown neutral aroma to &ldquo;fruity&rdquo; and &ldquo;rose&rdquo;. Results from the lay audiences&rsquo; flavor and aroma descriptors also indicate a shift with harvest date and associated &deg;Brix. To date, this is the first report of wine aromas from Brianna and Frontenac gris by GC-MS-O. Findings from this research support the hypothesis that aroma profiles of Brianna and Frontenac gris wines can be influenced by harvesting the grapes at different stages of ripening.

Wang Jun

Low permeability reservoirs are widely distributed in Subei（northern Jiangsu province） Basin. There are some problems such as insufficient natural energy and fragmented structures, which make it difficult to form an effective injection-production well pattern. Therefore, the effect of water injection is poor. The CO₂ huff and puff technology can effectively solve these problems with less investment, simple process and rapid results. Choosing the proper wells to execute is the key to the success of this technology. Based on the comparative analysis of CO₂ huff and puff in low permeability reservoirs in Subei Basin in recent years, combined with indoor physical simulation experiments and numerical simulation results, it is considered that closed reservoirs with medium-deep burial depth and fracture development are more suitable for CO₂ huff and puff. Fractures have a greater impact on huff and puff effect. There is an appropriate interval for formation pressure, not the bigger the better, whether miscibility can be achieved or not. It has no decisive effect on the throughput effect. Oil wells with high initial production and water cut of 30 %~70 % in lower structure are more conducive to huff and puff, and the huff and puff effect of horizontal wells is better than that of vertical wells.

Denisova Olga

This article describes an updated system for measuring and controlling the level of liquid media. Well-known capacitance method for determining the liquid level is modernised. The new scheme proposes the use of electro-optical cell with a nematic liquid crystal. Homeotropically oriented liquid crystal is sandwiched between two plates, one of which is glass, and the other – crystal – cadmium sulfide CdS photoconductor. liquid crystal cell serves as an indicator. Its light transmittance depends on the applied voltage. Cell is designed so that the dependence of the phase delay of the voltage is linear. The article describes a mathematical model showing linear dependence, confirmed experimentally. Application of linear electrooptic effect observed in liquid crystals, allows to improve the accuracy and speed of measurement of liquid media, as the liquid crystal is an anisotropic medium more sensitive than solid crystals. The relaxation time of the orientation effects in liquid crystals is ~10-6 s. From the point of view of practical significance, this method will be of interest for application in the fuel and energy complex, in particular, oil and gas industry for the commercial accounting of petroleum products.

T. Bobyleva, A. Khripunova

The article describes the current state, prospects of development of world and domestic gas industry. The analysis of exploration resources gas. Presented to world leaders in the production of natural gas. Describes the main trends affecting the development of the world gas market, special attention is paid to the active development of liquefied natural gas production. The different forecast scenarios of development of gas markets. Describes the basic scenario for gas demand, given attention to the problems of the gas industry and measures conducive to their achievement and future development of the gas industry.