Study of wax deposition reasons in non-isothermal main pipelines for hot pumping of high-viscosity waxy oil

2021 ◽  
pp. 87-91
Author(s):  
R.M. Karimov ◽  
◽  
R.Z. Sunagatullin ◽  
R.R. Tashbulatov ◽  
M.E. Dmitriev ◽  
...  
Keyword(s):  
High Viscosity ◽  
Wax Deposition ◽  
Waxy Oil ◽  
Main Pipelines

The Model of Wax Precipitation and Experimental Validation

2012 ◽  
Vol 463-464 ◽  
pp. 1182-1185 ◽  
Author(s):  
Bing Qiang Zhang ◽  
Da Shuai Xue ◽  
Ji Cheng Yang
Keyword(s):  
Rheological Property ◽  
Pour Point ◽  
Wax Deposition ◽  
Wax Precipitation ◽  
Oil Pipeline ◽  
Waxy Oil ◽  
The Past ◽  
Oil Pipelines ◽  
Experimental Values ◽  
Pipeline Safety

A comprehensive review of literature concerning rheological property, and wax deposition during involving the pipeline safety problems is presented. The deposition and gelation of waxy oil pose great flow assurance risks, especially in submarine oil pipeline. Even though there have been a lot of studies and breakthroughs in understanding the wax precipitation and deposition in the past few years, there still continue to be some challenges that have remained unsolved. In order to well understand the rheological property of the crude oil, First of all, the issue need to be solved is study the wax precipitation property of the oil. In this paper, an accurate model of wax precipitation in laboratory condition undergoing a cooling process is established. And then we predicted the wax appearance temperature, pour point and the weight of the wax appearance about the oil sample. Here, the calculated results of model are much close to the experimental values, which shows that the model of wax precipitation developed is correct and reasonable. By accurate prediction the WAT, pour point, we can well understand the rheological property, which will help the operators make an impeccable flow restart plan for the planned or emergency production shut-down of waxy oil pipelines

scholarly journals Wax inhibitor performance comparison for waxy crude oil from Fang oilfield

2021 ◽  
Vol 294 ◽  
pp. 06005
Author(s):  
Kreangkrai Maneeintr ◽  
Tanapol Ruengnam ◽  
Thodsaporn Taweeaphiradeemanee ◽  
Treetasase Tuntitanakij
Keyword(s):  
Crude Oil ◽  
Pour Point ◽  
High Efficiency ◽  
Performance Comparison ◽  
Wax Deposition ◽  
Cold Finger ◽  
Waxy Crude Oil ◽  
Waxy Oil ◽  
Point Reduction ◽  
Higher Temperature

In petroleum chemistry, waxy oil from paraffins can cause operating problems for oil production. The chemical method is used to remove by using chemicals or additives to prevent the wax problem. In this study, the performance of wax inhibitor are evaluated by the measurement of pour-point reduction and wax deposition of crude oil from Mae Soon area, Fang oilfield. Wax deposition is determined by cold finger technique. Wax inhibitors, hexane, Poly(maleic anhydride-alt-1-octadecene) (PMAO) and monoethanolamine (MEA) are mixed in oil sample at various concentrations. From the experiment, it is presented that hexane is used to reduce pour-point temperature up to 19.55 % and to reduce wax deposit up to 92.56 %. Moreover, MEA and PMAO have less effect on pour-point reduction. However, they have high efficiency to prevent wax deposition. PMAO provide the better wax deposition performance than MEA. The amount of wax deposit is lower at the same conditions. The percentage of wax deposit is from 39.19 % to 83.02 % for MEA and from 58.54 % to 88.51 % for PMAO. Furthermore, from the results, the preferred concentration of hexane can be at 10 % and PMAO can be 7500 ppm at low temperature or 5000 ppm for higher temperature. The results of this research can be applied to the practical way for wax deposition prevention operation in Mae Soon area in Fang oilfield to reduce the wax problem in the future.

scholarly journals Experimental investigation of wax deposition from waxy oil mixtures

2019 ◽  
Vol 9 (2) ◽  
pp. 77-90 ◽  
Author(s):  
Mojtaba Mansourpoor ◽  
Reza Azin ◽  
Shahriar Osfouri ◽  
Amir Abbas Izadpanah
Keyword(s):  
Experimental Investigation ◽  
Wax Deposition ◽  
Waxy Oil ◽  
Oil Mixtures

Microbial Prevention of Wax Deposition in Crude Oil

2012 ◽  
Vol 550-553 ◽  
pp. 1364-1368 ◽  
Author(s):  
Jiong Hong Liu ◽  
Yun Peng Jia ◽  
Rui Dan Xu
Keyword(s):  
Crude Oil ◽  
Group Treatment ◽  
Freezing Point ◽  
Reduction Rate ◽  
Separation And Purification ◽  
Wax Deposition ◽  
Waxy Oil ◽  
Optimum Proportion ◽  
Production Wells ◽  
Mixed Bacteria

Microorganisms were obtained by separation and purification experiment from waxy oil production wells in Daqing Oilfield. The paraffin removal strain was named for S1, and the biological surfactant strain was named for G1. Microscopic and morphological examinations showed strain S1 was to be Bacillus Subtilis and strain G1 was to be Bacillus Cereus. As an indicator of the degradation of paraffin, strain S1 and strain G1 were added in different proportions, the optimum proportion was 5:2. In this proportion the degradation rate of paraffin could reach to 64%, the prevention rate of paraffin could reach to 55%. By experiment after mixed bacteria group treatment, the viscosity of crude oil reduced from 36.9mPa•s to 27.8mPa•s, the reduction rate of viscosity was 24.7%, and the freezing point of crude oil reduced by 3.6°C, paraffinic hydrocarbons of crude oil were degraded.

scholarly journals About the effectiveness of hydrocarbon diluents for pipeline transportation of high viscosity heavy and waxy oil

2021 ◽  
pp. 148-155
Author(s):  
P. A. Revel-Muroz ◽  
◽  
R. N. Bakhtizin ◽  
R. M. Karimov ◽  
B. N. Mastobaev ◽  
...  
Keyword(s):  
High Viscosity ◽  
Point Of View ◽  
Gas Condensate ◽  
Chemical Effect ◽  
Chemical Reagents ◽  
Waxy Oil ◽  
Northern Latitudes ◽  
Physico Chemical ◽  
Motor Fuels ◽  
Stable Gas Condensate

Deposits of tight high viscosity heavy and waxy oil are becoming increasingly important in the world economy. They are also of particular importance in Russia, where the fields of easy accessible oil are practically depleted, and the newly discovered ones are located mainly in the northern latitudes of the country, which complicates their delivery to places of consumption, and use of so-called "special methods" (heating, chemical reagents) leadsytanb to an increase Cost. Despite the abundance of such methods, one can distinguish one of the most accessible and understandable from the point of view of the physico-chemical effect - dilution with hydrocarbon diluents, as can be effectively used by adding ready-made motor fuels and light distillates of oil, as well as - cheaper stable gas condensate, also co-produced in oil fields.In the present work, the experience of blending high viscosity heavy and congealing waxy oil with various types of hydrocarbon diluents has been considered with the aim of improving the operational properties of hydrocarbon crude, the transport and processing of which are associated with high costs due to the peculiarities of the composition and properties of the oil. The results of laboratory experiments on dilution of heavy and congealing oils with diesel fuel and stable gas condensate are given, on the basis of which recommendations on the effective usage these special methods. Keywords: oil; rheology; effective viscosity; pour point; hydrocarbon diluent; stable gas condensate.

scholarly journals Fields of Samara region - study of rheological properties of high-viscosity and waxy oil

2013 ◽  
Vol 8 (1) ◽  
Author(s):  
P.V. Roshchin ◽  
◽  
A.V. Petukhov ◽  
L.S. Vasquez Cardenas ◽  
A.D. Nazarov ◽  
...  
Keyword(s):  
Rheological Properties ◽  
High Viscosity ◽  
Waxy Oil

scholarly journals TECHNOLOGICAL PIPELINES CALCUCATION FEATURES FOR HIGH-VISION OIL PRODUCTS TRANSPORTATION

2018 ◽  
pp. 49-56
Author(s):  
Ye.V. Semenenko ◽  
Ye.S. Lapshin ◽  
M.M. Liah ◽  
S.V. Dziuba
Keyword(s):  
Tangential Stress ◽  
Newtonian Fluid ◽  
High Viscosity ◽  
Rheological Characteristics ◽  
Main Pipelines ◽  
Transportation Modes ◽  
Modern Methods ◽  
Operation Parameters ◽  
Newtonian Liquids ◽  
Technological Calculation

Purpose. Scientific basis substantiation for the technological calculation of main pipelines. Which are pumping high viscosity non-Newtonian liquids, taking into account the peculiarities behavior of the full Buckingham equation solution in various intervals of the values included in it. Methodology. The modern methods analysis for calculating rational parameters of the high viscosity non-Newtonian fluid viscosity transportation modes which made it possible to substantiate the specificity of the rheological characteristics of these liquids, taking into account the possibility of controlling their rheological properties by introducing surface-active reagents or a heterogeneous medium of lower viscosity. Findings. The scientific and methodological support for the calculation of the rational parameters of high viscosity non-Newtonian liquids transportation modes for main pipelines is substantiated, in order to ensure an increase in the efficiency of their operation. At the same time, the dependencies proposed in the work take into account the possibility of evaluating changes in the main pipelines operation parameters and modes with forced regulation by the rheological parameters of the pumped medium. Originality. Based on the modern methods of technological calculations of the main pipelines operation parameters analysis, the hydrodynamic feature of the high viscosity non-Newtonian fluids is determined, which is that the dependence of the hydraulic slope on the initial tangential stress and costs are expressed by a linear superposition of the terms containing these values, and the proportional coefficients are independent from the rheological characteristics of the environment, the properties of the transported and the pipeline diameter. Practical value. It consists in improved methods for calculating rational parameters for the transportation of slurries, slurries and high viscosity liquids in main pipelines. These methods allow to determine the pipeline diameter value, the choice of pumps indicators, taking into account the effective viscosity, as well as the initial tangential stress of high viscosity non-Newtonian fluid in order to reduce the energy intensity of transportation, save resources and improve the environmental safety of industrial areas. Key words: high viscosity non-Newtonian fluid, rheological characteristics, main pipeline, technological calculation

Experimental Investigation of Rheological Behavior and Wax Deposition of Waxy Oil–Disulfide Oil Systems

2019 ◽  
Vol 28 (4) ◽  
pp. 1609-1617 ◽  
Author(s):  
Mojtaba Mansourpoor ◽  
Reza Azin ◽  
Shahriar Osfouri ◽  
Amir Abbas Izadpanah ◽  
Rahmatallah Saboori
Keyword(s):  
Experimental Investigation ◽  
Rheological Behavior ◽  
Wax Deposition ◽  
Waxy Oil

scholarly journals MAGNETIC FIELD INFLUENCE TECHNOLOGIES ON HIGH-PARAFFIN CRUDE OIL IN THE PIPELINE WITH DIFFERENT CALIBER

2018 ◽  
Vol 1 (50) ◽  
pp. 208-213
Author(s):  
O. I. Nalyvaiko ◽  
Yu. L. Vynnykov ◽  
L. G. Nalyvaiko ◽  
R. V. Petrash ◽  
N. V. Ichanska ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Viscosity ◽  
Action Mechanism ◽  
Wax Deposition ◽  
Oil Transportation ◽  
Paraffin Oil ◽  
Magnetic Recovery ◽  
Oil Deposits ◽  
Field Influence

Influence technology of constant magnetic field at high paraffin oil is enhanced to prevent the formation and wax deposition in the tubing and during oil transportation by pipelines of different calibres. Action mechanism determination of directed static magnetic field on high- viscosity paraffin oil wells in Boryslav deposits was investigated by conducting laboratory tests of samples. For Botyslav field conditions the construction of magnetic recovery equipment (MRE) regarding the influence of magnetic induction on heavy oil deposits is designed.

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