scholarly journals Investigation of Electrohydraulic Effect on Physicochemical Characteristics of High-Resinous Oil “Karazhanbas”

2020 ◽  
Vol 22 (4) ◽  
pp. 315
Author(s):  
R.Kh. Salakhov ◽  
M. Seitzhanova ◽  
D.U. Bodykov ◽  
L.R. Sassykova ◽  
N.K. Zhakirova ◽  
...  
Keyword(s):  
Heavy Oil ◽  
Hydrocarbon Composition ◽  
13C Nmr Spectroscopy ◽  
Physicochemical Characteristics ◽  
High Viscosity ◽  
Fragment Composition ◽  
Oil Hydrocarbons ◽  
Oil Fractions ◽  
Before And After ◽  
High Viscosity Oil

In order to change the viscosity of high-resinous oil of the “Karazhanbas” field (Kazakhstan), the effect of electrohydraulic action on it was studied. The effect of adding an organic solvent xylene on the rheological properties of oil is investigated. A comparative study of the hydrocarbon composition of oil before and after electrohydraulic impact was carried out by the method of gas chromatographymass spectrometry. Fragment composition of oil hydrocarbons before and after electrohydraulic treatment was determined by 1H and 13C NMR spectroscopy. It is shown that the conversion of heavy oil fractions to light ones begins with a five-time electrohydraulic impact. It is determined that 20‒25 electric discharge pulses are sufficient for the quantitative process of splitting hydrocarbons. It was found that the addition of xylene to high-viscosity oil leads to an increase in the conversion of hydrocarbons under electrohydraulic action. The content of paraffins and naphthalenes in high-viscosity oil is slightly reduced during electrohydraulic processing. In oil, after electrohydraulic action, a decrease in the proportion of protons of long alkyl terminal СН3-groups of hydrocarbons is observed, which indicates the process of decomposition of heavy oil fractions into light fractions.

Investigation of the qualities of some promising oils of the Absheron oil and gas region

2021 ◽  
Vol 02 ◽  
pp. 22-26
Author(s):  
Yu.A. Abdulayeva ◽  
◽  
N.H. Alekperova ◽  
S.B. Logmanova ◽  
N.F. Kafarova ◽  
...  
Keyword(s):  
Sulfur Content ◽  
Oil And Gas ◽  
Viscosity Index ◽  
Hydrocarbon Composition ◽  
High Viscosity ◽  
Group I ◽  
Oil Fractions ◽  
Low Sulfur Content ◽  
Selective Refining ◽  
Low Sulfur

The article presents the characteristics of characteristic oils of the Apsheron oil and gas region, as well as the hydrocarbon composition of light and oil fractions. Oils of the Apsheron oil and gas region in terms of light fractions, sulfur content, and density are comparable to marketing grades of oils. The standards for prices are: graded crude oil WTI, Light Sweet, Brent, and Russian oils Sokol, Urals, Siberian Light are approaching them. We have studied in detail the yields and hydrocarbon composition of light and oil fractions of oils from the Apsheron oil and gas region. To obtain oils with a high viscosity index, studies were carried out to change the structure of oil fractions using hydrogen using the example of oil fractions of Azeri oil. Due to the significant content of aromatic hydrocarbons, schemes for the processing of oil fractions have been developed, including selective purification of distillates, dewaxing (except for Guneshli oil), as well as hydrocatalytic treatment in a severe mode in the presence of industrial Russian catalysts. As a result, it was possible to obtain API group I oils, according to the viscosity classification corresponding to SAE 20 and SAE 30. Thus, a study of the qualities and hydrocarbon composition of oils from the Absheron oil and gas region showed that these oils are characterized by a high content of light fractions, low density, and low sulfur content. According to these indicators, these oils correspond to the marker oils. In order to obtain base oils with a viscosity index of ≥90 and an aromatic hydrocarbon content of ≥10, a traditional refining method was used: selective refining, dewaxing, and severe hydrotreating.

scholarly journals NMR-Spectrometric Determination of the Fragmented Oil Composition from the Karazhanbas and Zhangurshi Oil Deposits

2018 ◽  
Vol 20 (3) ◽  
pp. 229
Author(s):  
D.U. Bodykov ◽  
T.M. Seilkhanov ◽  
M. Nazhipkyzy ◽  
A.S. Toylybayev ◽  
R. Salakhov
Keyword(s):  
13C Nmr ◽  
13C Nmr Spectroscopy ◽  
High Viscosity ◽  
Oil Composition ◽  
Alkyl Chains ◽  
H Nmr ◽  
A Value ◽  
Heavy Oil Residues ◽  
Before And After ◽  
Integrated Intensities

The methods of 1 H, 13C NMR-spectroscopy were used to study the fragmentary compositions of oil from the Karazhanbas, Zhangurshi deposits (Kazakhstan) and heavy oil residues obtained before and after the electrohydraulic effect of water hammer after topping a light fraction of oil products. Their fragmentary composition were determined by the value of integrated intensities of 1 H, 13C NMR signals of the oil under study. The obtained results have shown that the composition of oil samples understudy includes terminal CH3-groups of long alkyl chains having a value of 0.87 ppm. The presence of long alkyl chains of oil components imparts a high viscosity and bituminous consistency to the latter. The content of aromatic protons according to the integrated intensities of 1 H NMR in both oil samples does not exceed 2.08%; but there are no aromatic nuclei by the integral intensities of carbon atoms at all. The low content of protons of Hα-type in hydrocarbon crude (5.2–5.3%) indicates a low content of aromatic and carbonyl carbons as well as heteroatoms in the studied samples. The content of the greater proportion of protons of the Hγ-type in Karazhanbas oil (33.0%) compared to the Zhangurshi oil (23.8%) indicates a greater length of aliphatic hydrocarbons of the latter and its increased viscosity.

scholarly journals RAW MATERIAL BASE OF HARD-TO-EXTRACT OIL RESERVES OF RUSSIA

2020 ◽  
Vol 17 (34) ◽  
pp. 915-924 ◽  
Author(s):  
Oleg M PRISCHEPA ◽  
Yury V NEFEDOV ◽  
Olga E KOCHNEVA
Keyword(s):  
Heavy Oil ◽  
High Viscosity ◽  
Oil Extraction ◽  
Raw Material ◽  
Material Base ◽  
Oil Reserves ◽  
Wide Range ◽  
Oil Density ◽  
High Viscosity Oil ◽  
Different Sources

The estimation of the share of hard-to-extract oil reserves in the deposits of Russia varies by different sources, in a fairly wide range (from 30 to 70 %). Due to the absence of a common approach to their definition, the variety of parameters used to estimate this share and fundamentally different conditions for the development of the groups of reserves classified as hard-to-extract become challanging. A significant share of the proven oil reserves of Russian oil fields - about 34 % (6.3 million tons) - belongs to heavy (oil density more than 0.871 g/cm3) and super-heavy (oil density more than 0.895 g/cm3). In general, the share of high-viscosity and super-highviscosity oils is about 13% (2.4 million tons). The largest share refers to the deposits of three districts. In lowpermeable collectors (permeability less than 0.05 μm2), huge reserves are concentrated – 8.2 million tons or 44.6 % of all oil. Comparison of oil extraction and reserves structure indicates a good correlation for oil extraction from low-permeable collectors in 41.8 % with reserves percentage in 44.6 % as well as a relatively good correlation in super-heavy oil in 13.4% with reserves percentage in 18 % and low rates for super-high-viscosity oil in 1.7% with reserves perecentage in 6 %. Significant proven reserves of high-viscosity oil in Russia indicate the possibility of increasing production with the introduction of modern, existing and proven, technologies under appropriate economic conditions. Full-scale involvement in the development of only the largest deposits of high-viscosity oil would allow the Russian Federation to produce at least 25-30 million tons in the medium term.

scholarly journals Applications of optical descriptors for estimating the amount of sulphur in high viscosity petroleum fractions from the Ashalchinsk oil field

2020 ◽  
Vol 64 (11) ◽  
pp. 96-101
Author(s):  
Milana M. Dolomatova ◽  
◽  
Rashid I. Hairudinov ◽  
Ildar R. Hairudinov ◽  
Ella A. Kovaleva ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Refractive Index ◽  
Boiling Point ◽  
Fractional Composition ◽  
High Viscosity ◽  
Oil Field ◽  
Test Method ◽  
Chemical Descriptor ◽  
Oil Fractions ◽  
High Viscosity Oil

The article proposes a predictive mathematical model to determine the concentration of sulphur in hydrocarbon fractions by the boiling point of the fractions and the refractive index determined by the the sodium yellow line. The model allows for non-linearity of changes in the fractional composition and optical properties with an increase in the amount of sulphur in a multicomponent mixture. Due to the complexity of the multicomponent system, the problem to predict the sulphur concentration was solved using multivariate regression analysis. The model was constructed using a physical and chemical descriptor (boiling point) and an optical descriptor (refractive index). The Ashalchinskoye heavy oil was used as an object for research in this work. The Ashalchinskoye field is one of the most promising fields for industrial development of high-viscosity oil in the territory of Republic of Tatarstan. The authors have analyzed the fractional composition and studied the properties of ashalchinsk oil fractions. Methods for determining the fractional composition were carried out according to the ASTM D 2892-18 Standard Test Method for Distillation of Crude Petroleum (15-Theoretical Plate Column) using the fully computer controlled unit "I-Fisher DIST D-2892/5236 CC" in the range from 200 to 400 oC. The refractive index nD20 was determined using an IRF-454B2M multipurpose laboratory refractometer. The sulfur content in oil fractions was determined in accordance with GOST R 51947-02 and ASTM D 4294 by energy dispersive X-ray fluorescence spectroscopy using a sulphur analyzer RX-360SH manufactured by Tanaka Scientific Limited (Japan); for coke residue in accordance with GOST 2059-95 (ISO 351-96) by the POST-2 apparatus manufactured by Millab (Moscow, Russia). In this paper has been made a comparison between the results obtained from regression model and experimental results were for training and testing samples of high-viscosity oil fractions analyzed. Results of numerical studies for Ashalchinsk high-viscosity oil with a high sulphur content demonstrated very good agreement with the experimental data, which suggest adequacy of mathematical model. The data obtained from the model can be used in the preparation of high-viscosity oils for transportation and processing.

scholarly journals ANALYSIS OF DAMAGE ROD STRING COMPONENTS IN SUCKER ROD PUMP IN THE FIELD SS

2018 ◽  
Vol 7 (1) ◽  
pp. 47-55
Author(s):  
Fitrianti Fitrianti ◽  
Anwar Haryono
Keyword(s):  
Heavy Oil ◽  
High Viscosity ◽  
Oil Field ◽  
Stroke Length ◽  
Pump Speed ◽  
Artificial Lift ◽  
Sucker Rod ◽  
Sucker Rod Pump ◽  
High Viscosity Oil ◽  
Viscosity Fluid

Field SS is a Heavy Oil field which means high viscosity oil making it difficult to flow. Therefore, artificial lift was used in this field to help lifting the high viscosity fluid, i.e. sucker rod pump (SRP). In the last several years, problem of the damage to the rod string was frequently occur. Rod string damage is usually indicated by the occurrence of broken or detached components. In order to overcome the damage of rod string components on the sucker rod pump, several parameters that causes rod string damage in 41 well samples in the field SS were analyzed and then recommendations were made as an alternative to minimize the occurrence of rod string damage. After analyzing the parameters that can cause rod string damage on 41 well samples in SS field, the cause of the breakdown of rod string is fluid pounding for 37 samples well, while the causes for 4 samples of other wells is not detected. After that, recommendation efforts is done, like size down pump speed and stroke length for 9 samples of wells, size down pump size and pump speed for 6 samples of wells and size down pump speed for 22 samples well. As for the undetected cause 4 samples of wells, is recommended to do proactive well service.

Research on the Asphaltene Structure and Thermal Analysis in Catalytic Aquathermolysis of Heavy Oil

2011 ◽  
Vol 474-476 ◽  
pp. 893-897 ◽  
Author(s):  
Fa Jun Zhao ◽  
Yong Jian Liu ◽  
Yi Wu ◽  
Yong Si ◽  
Bo Zhang ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Heavy Oil ◽  
High Viscosity ◽  
Viscosity Reduction ◽  
Component Structure ◽  
Catalytic Aquathermolysis ◽  
Lower Viscosity ◽  
Before And After ◽  
Light Components ◽  
Asphaltene Structure

As an irreversible viscosity reduction way, catalytic aquathermolysis of heavy oil is given close attention by scholars at home and abroad, and a high content of asphaltene in heavy oil is the major cause for the high viscosity of heavy oil. Through the use of IR spectrum and TG-DTA, this paper analyzes the asphaltene structure and thermal analysis before and after the catalytic aquathermolysis reaction, and the result shows some changes in the heavy component structure in the asphaltene after the reaction, a reduction in some unsaturated structures, an increase in saturated structures, a reduction in long-chain structures, an increase in short-chain structures, and an increase in light components. Thermal analysis shows that part of the asphaltenes can be converted into alkane soluble substance. The catalyst acts on the heteroatoms in asphaltenes, which partly changes the asphaltene structure and makes it cracked to some extent, so as to lead to the lower viscosity of heavy oil.

Modeling High-Viscosity Oil/Water Cocurrent Flows in Horizontal and Vertical Pipes

SPE Journal ◽  
2012 ◽  
Vol 17 (01) ◽  
pp. 243-250 ◽  
Author(s):  
H.Q.. Q. Zhang ◽  
D.H.. H. Vuong ◽  
C.. Sarica
Keyword(s):  
Water Flow ◽  
Oil Recovery ◽  
Heavy Oil ◽  
Flow Behavior ◽  
Model Performance ◽  
High Viscosity ◽  
Low Viscosity ◽  
Oil Water ◽  
Mixing Length Theory ◽  
High Viscosity Oil

Summary Water is produced along with heavy oil either during the primary production or during enhanced oil recovery. Therefore, cocurrent oil/water flow is a common occurrence in heavy-oil production and transportation. Production-system design is strongly dependent on accurate predictions of the oil-/water-flow behavior. The predictions of previous mechanistic models for pressure gradient and water holdup are tested with the data acquired, and significant discrepancies are identified, especially for horizontal flow (Vuong 2009). The model performance is largely dependent on the predictions of phase inversion, distribution, and interaction. On the basis of the new understandings from experimental observations, the Zhang and Sarica (2006) unified model is modified by adding a new closure relationship for water-wetted-wall fraction in stratified flow and a new interfacial shear model based on mixing-length theory. The new model is compared with both high-viscosity and low-viscosity oil-/water-flow experimental results, and significant improvements are observed.

Study on Mechanism of Removing the Organic Matter in Heavy Oil Sewage by the Electric Flocculation Method

2012 ◽  
Vol 535-537 ◽  
pp. 2201-2208
Author(s):  
Yong Wang ◽  
Jie Nian Jie ◽  
Zhi Yong Li ◽  
Li Guo Wang ◽  
Jiang Wu ◽  
...  
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Heavy Oil ◽  
Tin Dioxide ◽  
Electrochemical Treatment ◽  
Oily Wastewater ◽  
Treatment Technology ◽  
Before And After ◽  
Treatment Technologies ◽  
Oily Wastewater Treatment

Oily sewage is one of the wastes produced in the oil industry production process and its quantity has been increasing year by year, which influences the environment and human health severely. Electric flocculation method is one of the wide application electrochemical treatment technologies for the oily wastewater treatment at home and abroad, which has higher efficiency than other technologies at the aspect of the organic pollutants degradation. A simulative experiment device dealing with heavy oil sewage by the electric flocculation method has been designed in this paper. The mechanism of the electric flocculation method in removing organic matter of the heavy oil sewage by analyzing the change of the composition and content of the organic matter in water samples before and after the process of the electric flocculation has been studied. Research results show: the carbon/tin dioxide electrode is better than the carbon/ ruthenium dioxide electrode in removing organic matter; most alkanes matters in the oily wastewater have been removed in the dispersing oil form by the electric flocculation; as the current density increases, the types and quantity of the response organic matter can be improved while types of the new synthetic organics increase. At the same time, this paper provides a theory support in specific optimization of the electricity flocculation flotation in oily wastewater treatment technology and process.

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