PROSPECTIVE PHYSICO-CHEMICAL METHODS OF INCREASING THE RECOVERY (EOR) FOR OIL FIELDS WITH THE CATEGORY OF HARD-TO-EXTRACT OILS

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Published: Wednesday, 19 April 2023 17:06
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Volume 14 (2), April 2023, Pages 110-116

Malik Abdullayev1, Samira Mansurova2, Nicat Qazanfarli3

1,2Associate Professor, Department of “Oil and gas engineering” Azerbaijan State Petroleum and Industrial University, Azerbaijan. Email-id: 1This email address is being protected from spambots. You need JavaScript enabled to view it. 2https://orcid.org/0000-0002-1284-4628

3Deputy chief, Oil and gas production department named after N. Narimanov. Azerbaijan.

ABSTRACT

 It is known that many technologies to improve the oil recovery factor in fields at a late stage of development are being used. However, there are no universal technologies that ensure the effective displacement of residual oil in the reservoir by changing the filtration and volumetric parameters of rocks and the rheological properties of fluids depending on the geological characteristics of the reservoirs. In the article, based on the analysis of well-known works carried out on the selection of the appropriate oil for displacement oil in the reservoir, taking into account changes in some reservoir parameters, research work was conductedwith the purpose to prepare a new composition.

The question of searching for a composition capable of maintaining oil-displacing properties at different temperatures in reservoir conditions, not changing its viscosity at large temperature differences, and also capable of retaining the properties of removing oil particles absorbed there from the surface in contact with the reservoir is relevant. the surface of the rock was examined by laboratory studies. The viscosities of the found composition at various temperatures were determined using a viscometer, and the optimal composition with a stable viscosity was determined by replacing the components with numerous laboratory experiments. Under laboratory conditions, the process of displacement of oil under various compositions with a slug of the composition at different temperatures was carried out.

The results obtained are satisfactory, and the effective behavior of the composition at bed temperatures of 30-80 0C has been experimentally confirmed.

If we take into account that the compositions injected into the reservoir undergo certain changes under the influence of reservoir temperature and pressure, then certain changes in its properties will inevitably occur when the composition comes into contact with reservoir fluids. Therefore, the ability of the prepared composition to form a precipitate or gel upon contact with various formation waters was also studied.

The results of laboratory studies of physical and chemical technologies for enhanced oil recovery in fields treated by water injection and thermochemical treatment are presented. These technologies can be used in reservoirs with hard-to-recover reserves of high-viscosity oil.

Keywords: viscosity, residual reserve, bed, surfactant, gel, oil displacer.

METHODS FOR ASSESSING THE TECHNICAL CONDITION OF DRILL ROTORS

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Published: Wednesday, 19 April 2023 17:03
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Volume 14 (2), April 2023, Pages 104-109

Mehin Bagirova1, Javid Mursalov2

1Associate Professor, Azerbaijan State Petroleum and Industrial University, Azerbaijan. Email-id: This email address is being protected from spambots. You need JavaScript enabled to view it.

2Master's student, Azerbaijan State Oil and Industrial University, Azerbaijan. Email-id: This email address is being protected from spambots. You need JavaScript enabled to view it.

 ABSTRACT

This article, devoted to methods for assessing the technical condition of drill rotors, will help to consider the problem of servicing industrial equipment. The relevance of this work lies in the fact that in today's time, with the development of industrial sectors, both in our country and in other countries, there is a need for new and effective approaches to assessing the technical condition of equipment. Especially with the expansion of the boundaries of the oil and gas industry, the number of unexplored deposits is increasing. To process such deposits, there is a need to introduce new methods of maintenance. In order to increase the productivity of equipment that works for a long time, sometimes continuously, it is important to adhere to certain service methods. The aim of the work is to study the available methods for assessing the technical condition of drill rotors and propose a new integrated approach that combines the available indicators and criteria of known methods. This article discusses in detail the methods for assessing the technical condition of drill rotors, their characteristics are studied. The objectives of this work are to analyze the available methods for assessing the technical condition of drilling equipment, to determine the procedure for establishing the noise and vibration characteristics of rotors, to develop criteria for assessing the technical condition of the rotor. The article also analyzes the factors affecting the operation of drill rotors in operating conditions. Having studied the existing methods, a new integrated method is proposed, which, through a point approach and the choice of a specific method, based on the available data on the unit, will ensure higher reliability and longevity of the drill rotors used. The use of an integrated method is based on the calculation of all important points that are relevant to the object under study. The proposed method will have to reduce errors and malfunctions of drill rotors, increase the accuracy and service life of the equipment. The choice of an integrated method will help to ensure the continuous operation of drill rotors in industrial enterprises.

Keywords: drilling rotor, method, control, damage, wear, factors, detection, vibration monitoring, noise characteristics, evaluation.

RESEARCH ON THE IMPROVEMENTS OF COUNSTRUCTION OF PUMP JACK WITH ONE-ARM SHOULDER

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Published: Wednesday, 19 April 2023 17:00
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Volume 14 (2), April 2023, Pages 93-103

Zuleikha Eyvazova1, Farhad Baydemirov2

1Associate Professor, Department of Industrial Machines, Azerbaijan State University of Oil and Industry, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

2Master student, Azerbaijan State University of Oil and Industry, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

ABSTRACT
In the production of oil by downhole rod pumps, as a drive, both in Azerbaijan and abroad, balancing one-arm and two-arm pump jack are most often used ones. In this article the goal is - a comparative study of the advantages of one-arm pump jack over two-arm pump jack. For that, the calculation of the main parameters was maid – displacenemt, speed and acceleration of suspension poin of rods and built comperative graphs for commercially avaible deaxial pump jack type of SKD8-3-4000 and the proposed construction of a one-arm pump jack. There are existing options, for holding a one-arm pump jack on the weight of the balancer when changing the stroke length of the suspension point of the rods that reviewed. Options for improving the one-arm pump jack are proposed.

Keywords: pumping unit, balancer, pump jack, one-arm, two-arm.

INVESTIGATION OF THE ENERGY CHARACTERISTICS OF CENTRIFUGAL PUMPS

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Published: Tuesday, 18 April 2023 19:01
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Volume 14 (2), April 2023, Pages 77-83

Ali-Hikmat Ahmadov1, Musayev Anar2

1Associate Professor, Dean the faculty of “Oil-mechanical”, PhD department of “Industrial machines”, Azerbaijan State Oil and Industry University, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

2Master, Azerbaijan State Oil and Industry University, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

 ABSTRACT

 A hydraulic device that is used to suck up liquid, move it under pressure or pump it, is called a pump. As a rule, any movement of a liquid by similar aggregates is carried out due to the transfer of potential or kinetic energy to it. Depending on the technical indicators, different types of pumps are used. At the same time, they differ in efficiency, power, volumes of fluid pumped per unit time, maximum head and resulting pressure.

The most used group of pumps are vane pumps. Their distinctive feature is the impeller rotating in a fixed housing, equipped with blades. Depending on the warehouse of the impeller and the conditions for moving fluid through it, vane pumps are divided into centrifugal and vortex.

With a centrifugal pump, liquid is supplied due to the centrifugal force that appears when the impeller rotates. She is carried away by the blades and, under the action of centrifugal force, moves from the middle of the wheel to the edges along the blades. The blades of the impellers are bent in the direction of rotation backwards. The number of blades is usually from 6 to 8 pieces. But special pumps for impure liquids, in order to increase the cross section of the channels in the wheel, are installed with a smaller number of blades from 2 to 4 pieces.

Centrifugal pumps are usually installed above the liquid level in the receiving tank, so they must be filled before use. The pump is filled with a check valve on the suction line through the filling funnel until the gas is completely expelled from the suction pipeline and the pump housing. In the absence of a check valve, for filling, air is forced out of the pump housing with the valve closed by a special vacuum pump. The same is done when filling large pumps. Centrifugal pumps are characterized by a rather high efficiency, compactness and durability of use.

Based on the numerical modeling of hydrodynamic processes, a substantiation of adjustment of the design of the working wheels of centrifugal pumps is given. Mathematical modeling of the fluid flow in the running part of the centrifugal pump is performed. The results of the CFD calculation are analyzed, after which an experimental work wheel is created, and its tests are carried out. There is a process of comparing a serial and experimental pump.

Keywords: Centrifugal pumps, numerical modeling, mathematical model, energy characteristics, hydrodynamic processes, dynamic characteristics, power engineering, working wheel, working fluid, working wheel vanes.

IMPROVEMENT OF OPERATING CAPACITY OF OIL PRODUCTION EQUIPMENT CONSIDERING THE INFLUENCE OF DYNAMIC LOADS

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Published: Wednesday, 19 April 2023 16:57
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Volume 14 (2), April 2023, Pages 84-92

Tahir Suleymanov1, Suleyman Efendi2, Aybeniz Amirova3

1Associate professor, Department of “Mechanics”, Azerbaijan State Oil and Industry University, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

2PhD student, Department of “Mechanics”, Azerbaijan State Oil and Industry University, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

3Chief laboratory assistant, Department of of “Mechanics”, Azerbaijan State Oil and Industry University, Azerbaijan, E-mail: ayka 59@ mail.ru

 ABSTRACT

 In the presented article, the analysis of the effect of the dynamic load falling on the polished rod of the sucker rod pump unit on the normal function of the operating unit during the oil extraction process was carried out. The general formula for the damage caused by the impact of the pump's wellhead packing seal has been derived. The dependence graph of damaged work on the length of the packing seal and the Poisson's ratio of the material was made.

Due to the dynamics of the frictional force generated in the packing seal of the stuffing box appropriately located below the suspension point of the rods, its forced cyclic movement occurs as a result of the impact transmitted to the system which consists of an incompressible fluid column, and the elastic rods. This requires the investigation of the dynamics of the rod pump associated with the probability of unpleasant situations such as the possible resonance occurrence in the specified system, the time between repairs, and the reduction of the working coefficient of the pump, in this regard.

At the same time, the questions such as the coefficient of friction depending on the selection of the material of the packing seal, the reduction of the dynamic accumulation of the load on the system, and the saving of electric energy are also important. It needs to be considered that the operation process is accompanied by a certain energy loss. It should be taken into account that even a small reduction in energy loss can manifest great economic benefits. It should be noted that some issues encountered in the process of operation of oil wells through the rod pump and depending on certain arguments affecting this process were also resolved by those experts.

Keywords: oil production, frictional force, sucker road pump, dynamic load, logging operations, logging cable, separator, energy loss, wellhead packing seal.

TUBING HANGER INVESTIGATE OF LOADING

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Published: Tuesday, 18 April 2023 18:59
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Volume 14 (2), April 2023, Pages 70-76

Zenfira Huseynli1, Alieva Rovshana2, Akbar Hashimov3, Gulnara Feyziyeva4

1Associate professor, department of “Industrial Machines”, Azerbaijan State Oil and Industry University, phd in technical sciences, Azerbaijan. Email id: This email address is being protected from spambots. You need JavaScript enabled to view it.

2Laboratory assistant, department of “Industrial Machines”, Azerbaijan State Oil and Industry University, phd in technical sciences, Azerbaijan.

3Master student, Azerbaijan State University of Oil and Industry, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

4Teacher, “Industrial Machines”, Azerbaijan State Oil and Industry University, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

 ABSTRACT

 In this article, the failures of tube hangers made from UNS N07718 are discussed. An arrangement known as a tubing hanger may be found in wells that produce either oil or gas. It is positioned in the upper tubing head’s bowl after it has been installed. The tubing is held in place by this, and a main annulus seal is created between tubing also the production casing. This holds the tubing in place, and at the same time, it creates a primary annulus seal between tubing also production casing. When compared to odd component in wellhead system, tubing hangers are available in a broader range of styles and sizes than any other option. Tubing hangers made of UNS N07718 are often used in the installation process of sour service oil and gas wells that operate under high pressure and also high temperatures. Afterwards more than 10 years of service, it was only recently found that the tubing hanger made of UNS N07718 had failed in sour wells. Failures of the tubing hanger will inference in substantial production delays as well as high workover expenses. The purpose of this research is to demonstrate the failure mechanism of tubing hanger furthermore its ramifications on existing wells that were erected with material that is comparable to what was used here. In order to establish what caused the failure, each and every exposure that was brought on by well intervention efforts was evaluated. The manner of failure of stringer head suspension was researched, as was its influence on already existing wells that had been erected with materials that were comparable.

Keywords: tubing head, tubing hanger, tubing thread, back pressure valve profile, landing shoulder, snap ring, running thread.

 

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