The paper deals with the comparison of different mathematical models with regard to their usage in the model-based leak-monitoring scheme. The pipeline is represented as a two-port system. Three models are compared: a nonlinear distributed parameters…
In the report the problem leakage detection of petroleum and gas from trunking pipelines is solved. The basic questions for the detection of the fact of occurrence of leakage and definition of a place of its occurrence are presented. Their…
Pipelines are one of great important components for gas and petrochemical industries. Normally, they are used to transport gas by hundreds or even thousands of miles. It is a momentous task to keep the gas pipeline under safety operation. Leak…
The fluid behavior in a pipeline of Liquefied Petroleum Gas (LPG)-according to the principles of conservation of mass and momentum-is governed by a set of Partial Differential Equations (PDE). In this work, such equations are modified with the…
A new direction of researches is the development of the methods to find effective technologies for natural gas processing. The practical interest to this researches is stimulated by the current situation when the degree of natural gas processing in…
We propose a method to use historical data to improve disturbance estimation in dynamic matrix control. It is proposed to compute the Kalman gain matrix of a step response model directly from plant data through a spectral or state-space realization.…
In this work, we propose and efficient structure for decision feedback equalization (DFE). The proposed structure makes use of the power-of-two quantization concept to completely eliminate the real multiplications in the DFE's update equations. The…
There appears to exist in the oil industry a definite use for a computing machine which may be employed to shorten the multi-component fractionation plate-to-plate calculations. A machine believed to be of satisfactory accuracy and reliability has…
THE PETROLEUM and natural gas industries utilize fractionating columns to separate hydrocarbons of high volatility from hydrocarbons of low volatility. Each column, or tower, is a type of equipment which permits a liquid stream to cascade down over a…
The study of relationships governing the variability of quality of Eurasian oils has been carried out on the basis of the statistical processing of data chosen from a database on petroleum chemistry which includes more than 9,000 entries of oil…
Important hydraulic characteristics of liquid pipelines and pumps that are necessary to assist the power engineer in evaluating optimum drive characteristics are reviewed. Typical pipeline pumping stations are developed with characteristic curves at…
Water injection exploration is a primary technology to ensure crude oil production. Especially during the mid to late term of oil field development, no water injection means no crude production. Therefore, oilfield companies set up large injection…
Asphaltene is apt to deposit from crude oil under high pressure condition, and the sediment will reduce the pipeline flow area and the performance of equipments, even block the submarine pipeline in extreme cases. The pressure is relatively high in…
There are two common flow regulation methods for crude oil pipeline, regulating valve opening and frequency converter speed regulation. The basic principle of frequency converter speed regulation and the principle of frequency converter power-saving…
Unlike ordinary refined products, high waxy crude oil has a potential serious safety problem during transportation because of its non-Newtonian characteristic. Further, the operating parameters of the pipeline and physical properties of the crudes…
Historical hallmark accomplishments pertaining to design and function of cathodic protection (cp) systems for marine structures are listed and briefly discussed. The newly developed first-principles based slope parameter method and a unified design…
We apply a PDE observer to a hydraulic system to detect and quantify an in- or outflux. We show that the PDE model of the hydraulic system can be expressed as a 2×2 linear hyperbolic system of PDEs with spatially varying coefficients coupled with an…
To prevent slug-flow on offshore oil production units, controlling a subsea pressure is the recommended solution. However, the subsea pressure is not often available as a measurement. The top-side pressure is usually measured but it is difficult to…
This paper studies the multiphasis slugging flow phenomenon occurring in oil wells and flow lines. The main contribution is a low-dimensional distributed parameters model, comprising the gas mass fraction, the pressure, and gas velocity as states.…
A physical model based on flow rate testing instrument used flow-concentrating horizontal wells is established. According to the continuity equation and momentum conservation equations, a mathematical model of oil-water two-phase flow is derived. The…
Two-phase flow is said as the flow of two phases simultaneously in a pipe. Two-phase flow occurs in both production and injection wellbores. In injection wellbores, the two-phase moves downward and so it is known as downward flow. The complexity of…
This paper was based on the acoustic propagation mechanism in the oil pipe, the transmission model is established, dispersion equation and spectral distribution equation are derived, and the attenuation characteristics of acoustic propagation is…
Energy companies and governments have considered alternative solutions over traditional planning problem where electricity, natural gas, oil are treated as an independent problem. The optimization and integration of the energy sources and demands in…
In order to reduce oil leakage accidents in transmission process, this system with the advanced algorithm and precise GPRS remote transmission technology, can be in one of the circumstances, automatic completion of leak detection and alarm and…
Pipelines are one of great important components for gas and petrochemical industries. Normally, they are used to transport gas by hundreds or even thousands of miles. It is a momentous task to keep the gas pipeline under safety operation. Leak…
This article describes how to use a three-dimensional MODFLOW model, paired with MT3D, to predict groundwater pollution caused by oil pipeline leakage. Then using geological and hydraulic data, the potential area of oil pollutant transport and its…
With the development of Natural Gas Pipeline in China, gas turbine & compressor unit has been widely used, so the fault diagnosis of its equipment is important particularly. In this paper, the method based on SDG (Signed Directed Graph) and Bayes…
Pipe diameter is one of important options of designing a long distance gas pipeline. In order to select effectively pipe diameters in designing a gas pipeline, the concept of minimum pipe diameter is presented. Based on this concept, formula of…
There are two common flow regulation methods for crude oil pipeline, regulating valve opening and frequency converter speed regulation. The basic principle of frequency converter speed regulation and the principle of frequency converter power-saving…
The fluid behavior in a pipeline of Liquefied Petroleum Gas (LPG)-according to the principles of conservation of mass and momentum-is governed by a set of Partial Differential Equations (PDE). In this work, such equations are modified with the…
In order to explore the motion law of oil spill to conduct cleaning, simulation for submarine oil spill based on wave motion is carried out by user defined function and volume of fluid in FLUENT, and the dispersion and diffusion of oil spill in deep…
The present oil spill models are usually based on sea surface, while few of them are for submarine oil spill. Therefore, modeling and simulation for submarine pipeline oil spill is discussed by FLUENT in this paper to forecast the trajectory of oil.…
The paper deals with the comparison of different mathematical models with regard to their usage in the model-based leak-monitoring scheme. The pipeline is represented as a two-port system. Three models are compared: a nonlinear distributed parameters…
By analyzing node equations in gas network, a mathematical model of steady-state calculation in urban pipeline with node method was established. Computer programs using MATLAB have been written. The algorithm can be used for hydraulic adjustment…
The mechanical characteristics of circular arch span pipelines under load of pressure, temperature, deadweight and wind are obtained by shooting method. In order to solve the nonlinear boundary-value problems, the Kirchhoff theory is used. The large…
This paper examines a fluid-particle flow system with constant pipe burst problems. Particles from the reservoir were found to be a major threat to the service life of conveying pipelines. This is responsible for about 65% of pipeline leakages in…
In order to accurately determine the remaining strength of pipelines with corroded defects, this paper studied the B31G Code and theoretical basis of the finite element analysis. Aiming at piping pressure of the same pipeline with corroded defect, we…
In the oil-gas pipeline magnetic flux leakage (MFL) detection, the qualitative and quantitative analysis can be achieved. The circumferential excitation technology is an effective way to detect or size axial direction of defects reliably
In the report the problem leakage detection of petroleum and gas from trunking pipelines is solved. The basic questions for the detection of the fact of occurrence of leakage and definition of a place of its occurrence are presented. Their…
The control equation of transient flow on oil pipeline was discretized. Based on extended Kalman filtering, the robust adaptive Kalman filter was designed with fictitious noise compensation method. The input and output vector of the distributed…
In this paper a lumped transfer function (TF) model is derived for High Pressure Natural Gas Pipelines. Departing from a nonlinear partial differential equation (PDE) model a high order continuous state space (SS) linear model is obtained using a…
The new design AZK-T of the automatic independent device for emergency shut-down of MG is considered. Using the results of numerical modeling the basic geometrical and regime parameters of AZK-T have been chosen. The preproduction model of the…
Nowadays, most of the analysis of the explosion of und erground gas pipeline consequences did not consider the tunnel's covering ground conditions. In this paper,the risk are analyzed w ith considering and without considering of covering rock layer…
Natural gas dehydration is one of the crucial upstream operation processes to protect the gas transportation pipeline and fulfill the sale gas specification. The most commonly used technology for the gas dehydration is glycol absorption. Even though…
The unbundling of the electricity sector and the force of competition have developed new technologies of the generation and the delivery of electricity. From another point of view, the transmission and distribution activities are very similar with…
Importance measures are widely used to characterize the roles of components in systems. The system lifetime can be divided into different life stages. Traditionally, importance measures do not consider the possible effect of the expected number of…
For a two-level supply chain with a single vendor and a single buyer, a model is presented to determine the optimal production-shipment policy taking into account of the fuel cost of shipment. The objective is to minimize the total cost of a…
Unlike ordinary refined products, high waxy crude oil has a potential serious safety problem during transportation because of its non-Newtonian characteristic. Further, the operating parameters of the pipeline and physical properties of the crudes…
With thorough work on reduction technology of carbon dioxide emission, CO2 capture and storage is gradually paid great attention by international scholars. Transport is an integral part of this capture and storage technology. It has been estimated…