Известия Томского политехнического университета: Инжиниринг георесурсов (Oct 2018)
Dependence of a sensitive element deflection in a pressure measurement sensor in a pipeline
Abstract
The relevance of the research is caused by the need to increase the energy efficiency of activities of the oil companies “Zhiant”, “Tomskaya Neft” and “VTK”, while unconditionally ensuring the continuity of the technological processes of extraction and reliability of the equipment, the implementation of existing sanitary standards, and, on this basis, fuel and energy resources. The main aim of the study is to justify the use of organizational measures to increase energy efficiency to ensure sustainable management of the technological process of oil production, all auxiliary technical processes, as well as compliance with the criteria of technological safety. The practical use of available energy efficiency reserves should be based on reliable accounting data for automated monitoring of energy consumption at oil producing enterprise, system analysis and forecasting of energy consumption and also on system analysis of sectoral energy balances (benchmarking studies). Object: an analytical method for estimating the quantitative indicators of consumption of fuel and energy resources in the extraction of a product unit. Commercial accounting of electric power for such oil-producing enterprises of Tomsk region as “Zhiant”, “Tomskaya Neft” and “VTK” is carried out by commercial meters installed on the border of the balance sheet of electrical networks, as well as by the automated system of commercial electricity metering), adopted for commercial settlements in the wholesale electricity (capacity) market. It is not enough to organize system monitoring and analysis of electricity consumption). For oil companies “Zhiant”, “Tomskaya Neft”, “VTK” the volume of electricity consumption for year is about 87 % among other fuel and energy resources. At the same time,the most energy-intensive technological process at oil-extracting enterprises is mechanized oil production - the share of drives of downhole pumps accounts for up to 60 % of the total electricity consumed by the enterprise. Results. Study of the influence of transported liquid and pressure sensor parameters on the change of sensitive element deflection of the considered device has shown that it is necessary to consider such parameters of the sensor as Poisson's coefficient and sensitive element thickness when selecting pressure sensors. It was determined as well that the density of the pumped-over liquid effects most of all the sensor sensitive element deflection. Using the Simulink application of the MatLab program the authors studied the most widespread pressure sensor of DMD 331'A'S'AX. It was defined that the amplitude of an oscillations sensitive element is 3,5 mm and oscillations time is 180 seconds in case of the most allowable pressure of 9,8 MPa at high measured pressure in a pipe. At increase in pressure the process becomes dispersing that signals a membrane rush.
