Autonomous electrical heating facility supplied by wind turbine for elimination of oil wellbore paraffin deposits
The article considers an autonomous electrical heating facility supplied by a wind turbine designed to eliminate paraffin deposits in an oil wellbore. Computer modeling of the facility is performed. Modeling results are verified with a laboratory simulation bench. Operating curves for various operating conditions are obtained. An optimal resistance of the heating cable is determined to ensure a maximal efficiency of the wind turbine, as well as the amounts of energy produced by the wind turbine with a constant load resistance and resistance control are compared.
Increase in Energy Efficiency of Oil and Gas Companies by Perfecting of Management Systems
The aim of this paper is to develop a method of intellectualizing information and measuring systems, designed to control the complex of parameters of sophisticated multiphase flows under uncertainty and its implementation by the example of creating methodology for an adaptive information and measuring system of the transported oil parameters and detecting organic deposits on the pipeline inner surface to improve the efficiency of the implementable state information system of the fuel and energy sector and to determine optimal operation specifications for the oil transportation process control system. The assigned aim achievement provides for improving energy and environmental performance of oil enterprises, reducing the anthropogenic impact induced by the fuel and energy sector on the ambient medium. This paper presents grounding for the structure of the measuring system, designed to provide effective non-separation measurements of dynamic oil flows in pipelines and the thickness of paraffin deposits on the pipeline inner surface. A computer model for simulating the operation of an automated process control system for oil transportation, according to the MatLAB mathematical computing system, the SimuLink software package, was developed based on the proposed intelligent system use.
Characterization of high molecular weight hydrocarbons (>C40) in oils and reservoir rocks
Abstract The presence of high molecular weight hydrocarbons in crude oils has been known for some time, particularly in view of their ability to precipitate and form barriers and blockages in pipelines. Recent advances in analytical technology have led to the development of capillary columns for gas chromatography capable of withstanding high temperatures (350 to 450°C), which allow the characterization of hydrocarbons with carbon numbers as great as C100 and above. Consequently, the individual high molecular weight hydrocarbon compounds in oils and waxes can now be identified. In the present paper, results are presented from high temperature gas chromatographic analyses of naturally occurring waxes. These clearly show the presence of significant concentrations of hydrocarbons with carbon numbers in excess of C40 in many of these samples. In order to assist in the quantification of these high molecular weight hydrocarbons, we have also assessed the potential of thermal microdistillation coupled with a field ionization detector, to obtain more accurate molecular weight distributions in wax samples. This is based on the concept that high temperature gas chromatography has an upper carbon number limit in the range C100 to C120. Thermal distillation may provide the ability to exceed that limit and determine the presence of compounds above C120. More detailed characterization of the wax fractions on a molecular level has the potential to provide clues as to the composition and origin of the residual components left in a petroleum reservoir at the end of its production history. A better understanding of the nature of this material will lead to improved secondary and tertiary recovery mechanisms, and other enhanced oil recovery procedures.