Nodal rheological task of oil mixing for optimal distribution of flows in branched pipeline network

Valeev

2023

MSF

This paper presents results of studies of the problem to describe the nature of oil flow at low temperatures and shear velocities for prediction of flow fluidity and determination of the parameters of a cold start of an oil pipeline after an extended downtime. Analytical and experimental studies have been carried out, which include a review of rheological test data from earlier studies available in the literature and an analysis of empirical relation obtained with the rotational viscometry method. More specifically, the existence of a zone of viscosity anomaly for low-paraffin and heavy oils has been proved on the basis of laboratory test data of model mixtures of commercial crude oils and their weighted samples. The necessity has been substantiated to create more adaptive rheological models which fit the total curve of oil flow, including the zone of viscosity anomaly in the transient state of cold start, this zone manifesting itself when reaching a certain temperature, even for low-paraffin oils. Based on the results of this work, the most advance multi-factor rheological models have been identified for description of the total shape of the rheological curve in a wide range of temperatures and velocities.

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Section: Fitting Of the Total Curve Of The Flow Of Non-newtonian Oilsmentioning

confidence: 99%

About Complex Oil Flow Curve Form in Anomaly Viscosity Low Temperatures and Shear Rates Conditions

Valeev

2023

MSF

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Improving Energy Efficiency of Main Oil Pipeline Systems by Method of Multidimensional Network Optimization of Oil Flows

IOP Conf. Ser.: Mater. Sci. Eng.

Bakhtizin

2021

The aim of this paper is to explore the organization of oil’s traffic from various oilfields through a system of main pipelines adapted to control the rheological properties of the pumped product due to rational oil blending of various oilfields at the nodal points of the pipeline system – at oil pumping stations with storage facilities. The current trend of increasing high-viscosity and high-pour-point oil production and the urgent need of their main pipeline transport are the main problem of our research. Its solution will provide an oil-transfer system from various oilfields that will minimize the total energy consumption for oil pumping. To determine the blending parameters at the nodal points we suggest to use the standard multidimensional optimization algorithm: the simplex method as the main calculation module. The objective function is presented in the form of total energy consumption for oil pumping, depending on the concentration of oil blending at the nodal points of the main oil pipeline system. We propose a method for calculating the objective function for any branched main oil pipeline system using algorithms for constructing a blending tree and determining its properties using the tree traversal algorithm. The issues of determining the limits of possible blending based on mass balance and quality reserve preservation of oils that delivered to consumers were also considered in our paper work. As an example, we solved this problem for an element of a main oil pipeline system with four oil blending nodes in the case of an oil viscosity increase of one of the suppliers. Carrying out multidimensional optimization of energy consumption for this system made it possible to increase its energy efficiency by more than 2%.

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Decision Support System for Feasibility Study and Determination the Optimal Way to Increase the Throughput Capacity of Main Oil Pipelines

2023 International Russian Smart Industry Conference (SmartIndustryCon)

Valeev

2023