The environmental improvement due to the relocation of base load gas production plant from Ma Tau Kok to Tai Po industrial estate

1994 ◽  
Author(s):  
Kwok-on, Desmond Chow
Keyword(s):  
Gas Production ◽  
Production Plant ◽  
Environmental Improvement ◽  
Industrial Estate ◽  
Base Load

A Comparison of Different Approximations for Computation of Second Order Roll Motions for a FLNG

2013 ◽  
Author(s):  
Flavia C. Rezende ◽  
Allan C. de Oliveira ◽  
Xiao-bo Chen ◽  
Fabio Menezes
Keyword(s):  
Gas Production ◽  
Second Order ◽  
Plant Performance ◽  
Production Plant ◽  
Surface Boundary ◽  
Natural Period ◽  
Oil Companies ◽  
First Order ◽  
Exploration And Production ◽  
Order Quantities

The use of FLNG units for gas exploration and production offshore is a subject in study by some oil companies. More complex and sophisticated than a FPSO production plant, a gas production plant has strict motion criteria in order to have an optimal operational performance. Due to this, designers have been trying hull concepts with small initial stability and higher roll motion periods in order to reduce the unit motions and improve the plant performance. Indeed, the increase of roll natural period dramatically reduces the first order roll motions. However, the unit still responds at its resonance due to second order excitation. These kinds of loads are also more complex and require a great computational power to be evaluated. Due to its complexity, which would involve the solution of a non-homogeneous free surface boundary condition, some approximations are used in order to assess the second order loads and motions. In this paper, the different formulations for the first part of QTF, contributed by first order quantities, are revisited and the differences are highlighted. Furthermore the approximations for the computation of the second part of the QTF, contributed by the second order potential, are benchmarked for the case of a FLNG operating in deep water depth.

scholarly journals Distribution of Heavy Metals in Surface Sediments of the Bay of Bengal Coast

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
M. Z. H. Khan ◽  
M. R. Hasan ◽  
M. Khan ◽  
S. Aktar ◽  
K. Fatema
Keyword(s):  
Heavy Metals ◽  
Trace Elements ◽  
Sediment Quality ◽  
Contamination Factor ◽  
Pollution Load Index ◽  
Gas Production ◽  
Production Plant ◽  
Marine Sediment Quality ◽  
Bay Of Bengal Coast ◽  
The Impact

The concentrations of major (Si, Al, Ca, Fe, and K) and minor (Cd, Mn, Ni, Pb, U, Zn, Co, Cr, As, Cu, Rb, Sr, and Zr,) elements in the surficial sediments were studied in an attempt to establish their concentration in the Bengal coast. It was revealed that the majority of the trace elements have been introduced into the Bengal marine from the riverine inflows that are also affected by the impact of industrial, ship breaking yard, gas production plant, and urban wastes. The concentration of heavy metals was measured using Atomic Absorption Spectroscopy and Energy Dispersive X-ray fluorescence instruments. The highest concentrations for several trace elements were thus recorded which generally decrease with distance from the coast. It was observed that the heavy metal concentrations in the sediments generally met the criteria of international marine sediment quality. However, both the contamination factor and pollution load index values suggested the elevation of some metals’ concentrations in the region. Constant monitoring of the Bengal coast water quality needs to be recorded with a view to minimizing the risk of health of the population and the detrimental impacts on the aquatic ecosystem.

scholarly journals Анализ работы системы транспортировки сжиженного природного газа

2020 ◽  
Author(s):  
N.V. Pershin
Keyword(s):  
Natural Gas ◽  
Graph Model ◽  
Gas Production ◽  
Liquefied Natural Gas ◽  
Kolmogorov Equation ◽  
Production Plant ◽  
Production Lines ◽  
Mild Winter ◽  
Climatic Regions ◽  
Number Of Branches

В настоящее время активно развивается транспортировка сжиженного природного газа, с помощью танкеров-газовозов, из сложных климатических регионов. В работе анализируется показатель эффективности транспортировки сжиженного природного газа. Представлена модель Танкер-газовоз Завод по производству сжиженного природного газа имеющая четыре вершины. Анализируется функционирование системы транспортировки на графовой модели, описываемой уравнением Колмогорова. Определены вершины графовой модели, дуги размечены интенсивностями перехода. Для рассматриваемой модели определены финальные вероятности состояний, в которых может находиться система. Приведены результаты расчета и анализ функционирования системы для различных условий лето, мягкая зима, средняя зима, суровая зима. Показано, что увеличение количества технологический линий на заводе по производству сжиженного природного газа, при прочих равных условиях, повышает эффективность функционирования системы и снижает убытки за счет уменьшения времени простоя танкера-газовоза и потери сжиженного природного газа за счет испарения из резервуара. Проведенные расчеты позволяют сформулировать требования к автоматизированной системе управления перевозками сжиженного природного газа.Currently, the transportation of liquefied natural gas, with the help of LNG-tankers, from complex climatic regions is actively developing. The paper analyzes the indicator of the efficiency and functioning of transportation of liquefied natural gas. The model LNG Tanker - Liquefied Natural Gas Production Plant with four peaks is presented. The functioning of the transportation system on a graph model described by the Kolmogorov equation is analyzed. The vertices of the graph model are determined, the arcs are marked with transition intensities. For the model under consideration, the final probabilities of the states in which the system may be located are determined. The results of calculation and analysis of the functioning of the system for various conditions are presented - summer, mild winter, middle winter, severe winter. It is shown that an increase in the number of production lines at a liquefied natural gas plant, all other things being equal, increases the efficiency of the system and reduces losses by reducing the downtime of a LNG tanker and the loss of liquefied natural gas due to evaporation from the tank. It is shown that an increase in the number of branches at a liquefied natural gas plant, all other things being equal, increases the efficiency of the system and reduces losses by reducing the downtime of a gas tanker and the loss of liquefied natural gas due to evaporation from the tank.

Root cause analysis of failure of bolts in the low pressure section of a gas turbine in an oil and gas production plant

2020 ◽  
Vol 115 ◽  
pp. 104675
Author(s):  
M. Mousavinia ◽  
A. Bahrami ◽  
S.M. Rafiaei ◽  
M. Rajabinezhad ◽  
M. Taghian ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Oil And Gas ◽  
Root Cause Analysis ◽  
Low Pressure ◽  
Gas Production ◽  
Production Plant ◽  
Oil And Gas Production ◽  
Cause Analysis ◽  
Root Cause

The Research of Oil Production Plant of Reservoir Operation and Management Improvement

2014 ◽  
Vol 962-965 ◽  
pp. 1900-1903
Author(s):  
Ai Ling Wang ◽  
Jiao Wang
Keyword(s):  
Oil And Gas ◽  
Comprehensive Evaluation ◽  
Reservoir Management ◽  
Oil Production ◽  
Gas Production ◽  
Production Plant ◽  
Oil And Gas Production ◽  
The Subject ◽  
Development And Management ◽  
Operation And Management

As the subject of oil and gas production, reservoir management is the oil production plant’s core business. But at present, there are some problems in reservoir management. For example: the development and management unit is not clear; the organizational structure is not streamlining; management mechanism is not perfect; evaluation is not systematic and so on. So, the oil production plant should focus on those four aspects to explore reservoir management---“unified the ground and underground, clear the input-output” “flattened the management layers, specialized functions structure” “market-oriented economy development, optimize the production process” “long-efficiency business goal , comprehensive evaluation of analysis”

scholarly journals Corrosion-Fatigue Failure of Gas-Turbine Blades in an Oil and Gas Production Plant

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 900
Author(s):  
Mojtaba Rajabinezhad ◽  
Abbas Bahrami ◽  
Mohammad Mousavinia ◽  
Seyed Jalil Seyedi ◽  
Peyman Taheri
Keyword(s):  
Gas Turbine ◽  
Corrosion Fatigue ◽  
Oil And Gas ◽  
Turbine Blades ◽  
Gas Production ◽  
Phase Identification ◽  
Production Plant ◽  
Rotating Speed ◽  
Gas Turbine Blades ◽  
Electron Microscopes

This paper investigates the root cause of a failure in gas-turbine blades, made of Nimonic-105 nickel-based superalloy. The failure was reported in two blades in the second stage of a turbine-compressor of a gas turbine in the hot section. Two failed blades were broken from the root and from the airfoil. The failure took place after 20 k h of service exposure in the temperature range 700–850 °C, with the rotating speed being in the range 15,000–16,000 rpm. The microstructures of the failed blades were studied using optical/electron microscopes. Energy dispersive X-ray spectroscopy (EDS) was employed for phase identification. Results showed that failure first initiated from the root. The dominant failure mechanism in the root was concluded to be corrosion-fatigue. The failure scenario was suggested based on the results obtained.

scholarly journals Data Driven Model of Gas Well Integrity and Its Application

2021 ◽  
Vol 2095 (1) ◽  
pp. 012092
Author(s):  
Jiangling Hong ◽  
Hongjie Zhang ◽  
Jiaqi Wang ◽  
Jinbo Liu ◽  
Honglei Liu ◽  
...  
Keyword(s):  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Fuzzy Comprehensive Evaluation ◽  
Gas Production ◽  
Evaluation Index System ◽  
Production Plant ◽  
Fuzzy Evaluation ◽  
Gas Well ◽  
Time Dynamic ◽  
Well Integrity

Abstract In view of the problems that there are many well control risk points and the situation is grim of Xinjiang No.1 gas production plant, this paper carries out the gas well integrity evaluation and risk assessment, and establishes the comprehensive fuzzy evaluation model (FCEM) of gas well integrity. This paper analysed the integrity status of gas wells in Xinjiang No.1 gas production plant, establishes the integrity evaluation index system with well barrier components, real-time dynamic index and management organization as the main influence factors, determines the membership function of each index, calculates the weight of each index by using analytic hierarchy process(AHP), and establishes the risk degree calculation model by using fuzzy comprehensive evaluation, Quantitative analysis of gas well integrity. In this paper, a case study of a well in Xinjiang No.1 gas production plant shows that the model can quantitatively calculate the risk of gas well integrity and provide a reference for early warning of gas well integrity failure.

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