scholarly journals The research and development of technical and technological solutions for the operation of oil wells with increased gas content

2021 ◽  
pp. 31-40
Author(s):  
M. I. Korabelnikov ◽  
◽  
S. N. Bastrikov ◽  
N. A. Aksenova ◽  
A. T. Khudaiberdiev ◽  
...  
Keyword(s):  
Gas Content ◽  
Financial Costs ◽  
Effective Technology ◽  
Thermodynamic Conditions ◽  
Oil Water ◽  
Oil Deposits ◽  
Low Efficiency ◽  
Formation Of Hydrates ◽  
Pumping Equipment ◽  
Productive Time

In the practice of oil production, there are oil deposits with high values of gas content (gas factor), from tens to hundreds of cubic meters of gas per one ton of oil produced. Gas dissolved in oil and coming from the reservoir into the well along with the liquid phase (oil, water), under certain thermodynamic conditions, is capable of forming hydrates, which complicate the operation of downhole pumping equipment, reduce the efficiency of pumps and well flow rate. The formation of gas hydrate plugs in the well requires the total overhaul, which leads to an increase in non-productive time, financial costs and an increase in lost profits on lost oil. Considered in the article technologies and devices that prevent the formation of gas hydrates in marginal wells with a high gas content in oil have shown their unreliability and low efficiency. The authors propose for the consideration a new effective technology for the operation of such wells, which makes it possible to avoid the formation of hydrates. Keywords: well; gas content; hydrates; production; oil; valve; coupling; pump.

USING ARTIFICIAL INTELLIGENCE METHODS TO PREVENT COMPLICATIONS IN WELL CONSTRUCTION

2021 ◽  
Vol 4 (1) ◽  
pp. 132-144
Author(s):  
A.N. Dmitrievsky ◽  
◽  
N.A. Eremin ◽  
A.D. Chernikov ◽  
L.I. Zinatullina ◽  
...  
Keyword(s):  
Artificial Intelligence ◽  
Oil And Gas ◽  
Automated Systems ◽  
Emergency Situations ◽  
Machine Learning Methods ◽  
Artificial Intelligence Methods ◽  
Well Field ◽  
Oil Water ◽  
Model Oil ◽  
Productive Time

The article discusses the use of automated systems for preventing emergency situa-tions in the process of well construction using artificial intelligence methods to increase the productive time of well construction by reducing the loss of working time to eliminate compli-cations. Key words: problems and complications during drilling, emissions, gas and oil water showings, stuck, artificial neural networks, digitalization, drilling, well, field, oil and gas blockchain, artificial intelligence, machine learning methods, geological and technological research, neural network model, oil and gas construction wells, identification and forecasting of complications, prevention of emergency situations.

Development of Pumping Equipment for Oil and Gas Production in Complicated Conditions

2019 ◽  
Vol 16 (11) ◽  
pp. 4573-4578 ◽  
Author(s):  
M. A. Mokhov ◽  
Yu. A. Sazonov ◽  
V. V. Mulenko ◽  
M. A. Frankov ◽  
Kh. A. Tumanyan ◽  
...  
Keyword(s):  
Gas Turbines ◽  
Oil And Gas ◽  
Gas Production ◽  
Additive Technologies ◽  
Operating Conditions ◽  
Gas Content ◽  
Oil And Gas Production ◽  
Hydraulic Machines ◽  
Pumping Equipment ◽  
Complicated Conditions

The research is aimed at the development of new scientific principles for the creation of special pumping equipment for the extraction of oil and gas in complicated conditions. In many cases, the complicated operating conditions of the pump are determined by the high gas content and high content of mechanical impurities in the multiphase flow. In the course of scientific research, new methods of designing hydraulic machines were tested, including the use of additive technologies. In the study of labyrinth pumps, the issues were considered concerning the features of the operating process with increased rotor speed. New design of the rotor manufactured using additive technologies was discussed. It is shown that the rotor screw in a labyrinth pump can be replaced by a set of impellers, for example, by a set of centrifugal wheels or a set of axial wheels. New results concerning labyrinth pumps can give impetus to the development of research on hydraulic and gas turbines, as well as on heat engines. Some results of the works performed can be used to create robotics.

Specialized ESP Layouts for the Operation of Deep Wells Confined to the Category of Hard-to-Recover Reserves

2021 ◽  
Author(s):  
Nikolai Pavlovich Sarapulov ◽  
Maxim Valerevich Vasin ◽  
Andranik Sedrakovich Palandzhyants ◽  
Evgeni Alexandrovich Tambovstev ◽  
Rinat Alfredovich Khabibullin
Keyword(s):  
Operating Time ◽  
Specific Energy Consumption ◽  
Flow Characteristics ◽  
Gas Content ◽  
Well Production ◽  
Deep Wells ◽  
Oil Flow ◽  
Natural Separation ◽  
Pumping Equipment ◽  
Selection Of

Abstract The article is devoted to the selection of a specialized configuration of submersible equipment to minimize downhole pressure in order to intensify the flow of fluid to the wells of Gazpromneft-Orenburg. The depth of the wells and the design features of the well do not allow sufficient depth of the pumping equipment (top of the perforation interval 3800-4200 m). In addition, the operation of the fund is complicated by abnormally low reservoir pressures (60-120 at), low filtration-capacity properties and high linear pressures of single-standing wells (20-30 at). To increase the productivity of wells, the ESP layout was used with a two-way engine, two submersible pumps and a shank. The layout is chosen in such a way as to reduce the density of the liquid column under the pump due to the circulation of the liquid by the lower pump. A special feature of the design was the selection of the length and the limit of the descent of the shank, the ratio of performance and pressure of the upper and lower pumps and a number of pre-connected devices as part of the layout. Pilot tests were conducted at three wells of the Gazpromneft-Orenburg field. After the installation and commissioning work in the process of bringing the wells to the established mode, the features of the ESP that differ from the standard operation, leading to an increase in the period of stable well production, were revealed. According to the results of the tests, an increase in the oil flow rate of an average of 16 tons per day was obtained. The study of the characteristics of a complete installation directly on the test wells allowed us to determine the technical capabilities of the equipment, the volume-flow characteristics of the fluid under the pump and PVT. The aspects of natural separation and free gas content at the inlet of both pumps are studied, which is also a boundary condition for well intensification. The tests allowed us to assess the technological limit of the layout with two ESP in the conditions of the Gazpromneft-Orenburg field. In contrast to other options for the operation of hard-to-recover wells, the proposed layout has a number of advantages, such as a minimum increase in the cost of construction, simplicity of construction, which ensures high operating time of equipment and low specific energy consumption. Based on the results of testing the pilot installations, a decision was made to replicate this approach in the Company.

Development of Catalyst for Industrial Flue Gas Denitration at Low Temperature

2014 ◽  
Vol 535 ◽  
pp. 683-687
Author(s):  
Qiao Wen Yang ◽  
Yan Jiao Ren ◽  
Lu Wei Zhao ◽  
Jin Lei Zuo ◽  
Wen Yi Sun
Keyword(s):  
Low Temperature ◽  
Selective Catalytic Reduction ◽  
Flue Gas ◽  
Catalytic Reduction ◽  
Molar Ratio ◽  
Fe Oxide ◽  
Oxide Precursor ◽  
Effective Technology ◽  
Low Efficiency

The most effective technology currently for flue gas denitrition is selective catalytic reduction (SCR). And the major problem against spreading SCR technology is the high cost and low efficiency of the catalyst for SCR. Al2O3 supported Mn-Fe oxide precursor was prepared through water/ethanol coprecipitation and then nitridized through NH3-TPD. Thus the inexpensive and efficient Mn-Fe-O-N/Al2O3 catalyst was obtained. The catalyst with a Mn/Al molar ratio of 0.4 and a Fe loading of 6.0 wt.% was testified to have the best performance for denitrition. The NOx conversion reached 95% at low temperature (150~200°C).

Rapid Synthesis of Aluminum Nitride Nanopowders from Gaseous Aluminum Chloride

2020 ◽  
Vol 862 ◽  
pp. 88-93
Author(s):  
Fu Lin Chu ◽  
Lai Wang Wang ◽  
Meng Yung Sun ◽  
Cheng Hsien Tsai
Keyword(s):  
Aluminum Nitride ◽  
Aluminum Chloride ◽  
Microwave Plasma ◽  
Resonant Cavity ◽  
Gas Content ◽  
Synthesis Process ◽  
Plasma Chemical ◽  
Aluminum Powders ◽  
Low Efficiency ◽  
Thermal Nitridation

The synthesis of aluminum nitride (AlN) powders is traditionally completed through a thermal nitridation process, in which the reacting aluminum powders are combined with nitrogen at high temperatures with a long reaction time (usually several hours). Moreover, the occurrence of agglomeration within the melting Al particles results in a poor dispersibility of AlN powders, with a low efficiency of nitridation. In this study, an atmosphere-pressure microwave plasma preceded the rapid gas-gas synthesis process. In the reactor, the gaseous aluminum chloride (AlCl3) reactant was fed at different positions (R1, R2, R3) to react with nitrogen at various reaction temperatures (690~1150°C) to rapidly produce AlN nano powders (in several seconds). The process was operated at a total flow rate of 13 slm with NH3 gas content of 0 or 0.77% and an applied power of 1200/1400 W. Results showed that the high purity and dispersibility of AlN powders were found at a AlCl3 feeding position closer to the resonant cavity of the reactor (R3, 1150°C). The AlN particle size was in the range of 25-50 nm. The experiments indicated that the gas-gas reaction for rapidly synthesizing AlN nanopowders can be successfully carried out via an AlCl3-N2 plasma-chemical approach.

Study on the Feasibility of SRV in Coal Reservoir

2014 ◽  
Vol 986-987 ◽  
pp. 734-737
Author(s):  
Lin Lin Cheng ◽  
Yuan Fang Cheng ◽  
Chong Chen ◽  
Dong Feng Zhu ◽  
Wen Biao Deng
Keyword(s):  
Coalbed Methane ◽  
New Technology ◽  
Gas Content ◽  
Stimulated Reservoir Volume ◽  
Reservoir Volume ◽  
Surface Development ◽  
Low Efficiency ◽  
Weak Structure ◽  
Coal Reservoir ◽  
Rock Brittleness

In our country there is plenty of CBM (coalbed methane), but the state of CBM itself, unique output mechanism and low saturation, low permeability, low reservoir pressure and high gas content, et al. determine the low efficiency of it, so in order to improve CBM recovery, combined with the successful experience of north American shale gas reservoir by SRV(stimulated reservoir volume), the writer summarizes the implementation of SRV, deeply analyzes effectiveness and limitations of this new technology in CBM development. The results of practical research and theoretical analysis show that SRV in the coal reservoir can achieve the desired effect on the condition that there are great quantity of natural fractures, joints and bedding, weak structure surface development in the reservoir, the rock brittleness index is greater than 40 and horizontal principal stress difference is relatively smaller. Finally, simulating a well’s condition by the MEYER software, the result shows that SRV is feasible in coal reservoir, which will create important guiding significance and practical value for the exploration of CBM.

THE MAIN FACTORS AFFECTING THE LEVEL AND FORM OF WATER-OIL CONTACT

2015 ◽  
pp. 15-19
Author(s):  
A. V. Podnebesnykh ◽  
V. P. Ovchinnikov
Keyword(s):  
Hydrodynamic Pressure ◽  
The West ◽  
Facial Analysis ◽  
Factors Affecting ◽  
Reservoir Rocks ◽  
Reservoir Permeability ◽  
Oil Water ◽  
Main Factors ◽  
Oil Deposits ◽  
Vasyugan Formation

The paper discusses the main causes of inclined oil-water contacts occurrence in the deposits Strezhevskoye and Krapivinskoe of the West Siberian plate, confined to the deposits of Vasyugan formation. The authors believe that the main reasons for the inclined oil-water contacts occurrence are the heterogeneity of the reservoir rocks lithofacies characteristics, regional hydrodynamic pressure of reservoir waters and the imposed catagenesis during the oil deposits formation. For this purpose, the facial analysis of the productive deposits was conducted and the data on reservoir permeability were used.

scholarly journals Evaluation of a Jet-Pump for the Improvement of Oil-Water Flow in Pipeline Loops Using CFD Tools

2021 ◽  
Vol 321 ◽  
pp. 02012
Author(s):  
Miguel Asuaje ◽  
Jens Toteff ◽  
Ricardo Noguera
Keyword(s):  
Production Systems ◽  
Poor Performance ◽  
High Viscosity ◽  
Low Flow ◽  
Water Mixture ◽  
Centrifugal Pumps ◽  
Jet Pump ◽  
Jet Pumps ◽  
Oil Water ◽  
Low Efficiency

Despite their low efficiency compared with centrifugal pumps, jet pumps are highly reliable, robust equipment with modest maintenance, ideal for many applications, mainly in the oil & gas industry. Jet pumps are conventionally used to draw fluid from a storage tank in the petrochemical industry or as an artificial lift system to produce oil from a reservoir using energy from the primary fluid. The trunk lines in oil production systems can experience an unfavourable phenomenon due to the fluid's low velocities. In the case of transporting a heavy oil-water mixture with low flow velocities, it could promote oil and water stratification. Due to high viscosity, the stratified oil stick on the pipe,| causing a diameter reduction, resulting in a drop in fluids production and increased energy consumption. Given the virtue of jet pumps, this paper proposes using this equipment as an oil-water transfer pump as an alternative to expensive conventional multiphase pump systems. The jet pump will add fluid into the line, increase the fluid velocities, and promote the homogenous mixture of oil and water. Using ANSYS CFX, the effect of installing a jet pump in a conventional trunkline loop was analysed. Three jet pump configurations were simulated for different driving fluid pressures and compared against a traditional pipeline loop's performance. The first configuration shows a poor performance increasing only until 10% of handling fluids. Conversely, with the improved jet pump configurations rise of the fluid production by 30% has been obtained.

scholarly journals Oil-Water-Gas Three-Phase Separation in Multitube T-Junction Separators

Water ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2655
Author(s):  
Lele Yang ◽  
Jing Wang ◽  
Yong Ma ◽  
Sen Liu ◽  
Jun Tang ◽  
...  
Keyword(s):  
Droplet Size ◽  
Oil Content ◽  
Gas Content ◽  
Separation Performance ◽  
Oil Separation ◽  
Oil Droplet ◽  
Inner Diameter ◽  
Oil Water ◽  
Water Gas ◽  
Oil Droplet Size

Multitube T-junctions can be used as an oil-water-gas pre-separator in the oil and gas industry. In this paper, the mixture model, coupled with the k-ε turbulent model, was applied for a simulation of the oil-water-gas three-phase flow characteristics in the multitube T-junction separator. The oil droplet size ranged from 1 to 4 mm. The water content ranged from 5% to 20% and the gas content from 3% to 25%. According to the phase separation results for different droplet sizes, it was found that, as the oil droplet size increased, the water content at the water outlet initially increased and then tended to be stable. Therefore, it was necessary to increase the oil droplet size through corresponding measures before flowing into the T-junction for separation. For the separator with an inner diameter of 50 mm, the oil content at the inlet had a great influence on the water-oil separation performance, and the water-oil separation performance was obviously improved as the oil content decreased. Owing to increased residence time, the oil content had little influence on the water-oil separation performance when the separator with an inner diameter of 100 mm was applied. Moreover, for the separator with an inner diameter of 100 mm, the oil content had little influence on the degassing effect, and more than 90% of the gas could be discharged from the gas outlet. The separation performance of the multitube T-junction separator became worse as the inlet gas content increased.

Sign in / Sign up

Export Citation Format

Share Document