H. Kh. Melikov1, Sh. Z. Ismayilov1, A. A. Suleymanov1, N. F. Mammadli2
1Azerbaijan State Oil Academy, Baku, Azerbaijan; 2«OilGasScientificResearchProject» Institute, SOCAR, Baku, Azerbaijan
Diagnosing multiphase flow regime in multilayered reservoir by distributed temperature sensor measurements
The article discusses the possibility of diagnosing the multiphase flow regime in the multilayered reservoir by using DTS (distributed temperature sensing) data. The analysis of the theoretical and actual curves of temperature build up and drawdown, corresponding to the main modes of multiphase flow of formation fluids are given in this article. The possibility of diagnosis of the multiphase flow regime is found based on analysis and interpretation of the characteristics of temperature build-up and drawdown in different intervals of the reservoir at the start of the well or shut in, or by changing opening degree of the choke. The possibility of diagnosing water breakthrough (WBT) intervals, based on the analysis of the changes in temperature curves according to the DTS is shown. For a more detailed analysis and interpretation of temperature change curves in the wells more frequent DTS measurements are required. It is necessary to conduct a comparative analysis of the dynamics of the temperature and pressure redistribution in the productive zone of the well, with the results of geophysical logging, production logging, taking samples of reservoir fluids from different zones of productive layers in the multilayered reservoir, moisture metering, hydrometry and others.
Keywords: well; monitoring; multilayer reservoir; temperature profile; distributed temperature sensor; multiphase flow regime.
References
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DOI: 10.5510/OGP20220100627
E-mail: petrotech@asoiu.az
V. J. Abdullayev1, Kh. M. Gamzaev2
1«OilGasScientificResearchProject» Institute, SOCAR, Baku, Azerbaijan; 2Azerbaijan State Oil and Industry University, Baku, Azerbaijan
Numerical method for determining the coefficient of hydraulic resistance two-phase flow in a gas lift well
The process of stationary movement of a gas-liquid mixture in the lifting pipe of a gas-lift well is considered. To describe this two-phase flow, a mathematical model is proposed that includes the equation of flow motion and the continuity equation for each phase. The presented model is transformed to a single nonlinear ordinary differential equation with respect to pressure. Within the framework of the obtained model, the task is set to determine the hydraulic resistance coefficient of a two-phase flow according to an additionally specified condition with respect to pressure. An additional condition, presented in the form of a nonlinear algebraic equation, is transformed into an ordinary differential equation with respect to an unknown coefficient of hydraulic resistance by applying the method of differentiation by parameter. The solution of the resulting Cauchy problem is determined by the finite difference method. Based on the proposed computational algorithm, numerical experiments were carried out for model data.
Keywords: gas lift; two-phase flow; hydraulic resistance coefficient; parameter differentiation method; finite difference method.
References
- Veliyev, E. F. (2021). Polymer dispersed system for in-situ fluid diversion. Prospecting and Development of Oil and Gas Fields, 1(78), 61-72.
- Suleimanov, B. A., Veliyev, E. F., Naghiyeva, N. V. (2021). Colloidal dispersion gels for in-depth permeability modification. Modern Physics Letters B, 35(01), 2150038.
- Suleimanov, B. A., Guseynova, N. I., Veliyev, E. F. (2017, October). Control of displacement front uniformity by fractal dimensions. SPE-187784-MS. In: SPE Russian Petroleum Technology Conference. Society of Petroleum Engineers.
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- Veliyev, E. F. (2021). Prediction methods for coning process. Azerbaijan Oil Industry, 3, 18-25.
- Suleimanov, B. A., Veliyev, E. F., Aliyev, A. A. (2021). Impact of nanoparticle structure on the effectiveness of pickering emulsions for eor applications. ANAS Transactions, (1), 82-92.
- Veliyev, E. F. (2021). Application of amphiphilic block-polymer system for emulsion flooding. SOCAR Proceedings, (3), 78-86.
- Veliyev, E. F., Aliyev, A. A., Mammadbayli, T. E. (2021). Machine learning application to predict the efficiency of water coning prevention. SOCAR Proceedings, 1, 104-113.
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DOI: 10.5510/OGP20220100628
E-mail: vugar.abdullayev@socar.az
E. E. Bayramov
SOCAR, Baku, Azerbaijan
New combined well design to protect electric submersible pump from sand flow
The paper presents a new well construction in order to eliminate the unpleasant complications associated with the appearance of sand flow in the Electric Submersible Pumps (ESP), which is widely used in oil wells in the final stage of reservoir development. The new design is based on the combination of ESP with a Mixer based on the principle of ejector and centrifugal. The combined well construction limits the ESP to be in contact with the sand flow and prevents potential erosion and other complications. The design was modeled and tested in the laboratory condition.
Keywords: field; layer; pump; well construction; sand production; sand separator.
References
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DOI: 10.5510/OGP20220100629
E-mail: elman.e.bayramov@socar.az
A. M. Svalov
Oil and Gas Research Institute RAS (OGRI RAS), Moscow, Russia
Features of the impact of high-amplitude short pulses of hydrodynamic pressure on perforation channels
The features of the impact of high-amplitude short pressure pulses on perforation channels in the bottomhole zone of the well are analyzed. It is shown that in the channels formed in the rock with the use of cumulative perforation and having a conical shape, there is an increase in pressure pulses when a certain condition is fulfilled, which limits the duration of this pulse. It has been established that in the negative phase of the pressure pulse, destruction of the cured rock layers adjacent to the walls of the perforation channel can occur, which improves the filtration-capacitive properties of the bottomhole zone of the well. It is shown that when using explosive charges of low mass, pressure pulses are formed with parameters similar to those of pulses generated by electric discharges in the wellbore. To apply the technology of explosive action with low-mass charges on the bottomhole zone, the standard equipment used for cumulative perforation of wells can be used. A method for screening pressure pulses is proposed, which increases the effectiveness of their impact on the bottomhole zone of the well and simultaneously reduces the excessive load on the casing pipes above the productive formation.
Keywords: bottomhole zone of a well; perforation channels; electric discharge impact; low-mass charges; reflecting screen.
References
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DOI: 10.5510/OGP20220100630
E-mail: svalov@ipng.ru
I. K. Akhmedova
«OilGasScientificResearchProject» Institute, SOCAR, Baku, Azerbaijan
The study of a new paraffin inhibitor in oil production
A new composition for controlling build up of paraffin has been developed. Preference was given to naphthenic acids, polypropylene glycol, caustic potassium and copper nanoparticles with size of 50 nm, bulk weight 5 g/cm3, specific surface area 12 m2/g. The optimal concentration of the hydrophobic reagent and its application technology under field conditions are recommended. The developed reagent is used in oil production, namely for ARPD control, in individual wells in Azerbaijan.
Keywords: well; wax deposition; inhibitor; nanoparticle; electrokinetic potential.
References
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- Suleimanov, B. A., Veliyev, E. F., Naghiyeva, N. V. (2021). Colloidal dispersion gels for in-depth permeability
modification. Modern Physics Letters B, 35(01), 2150038.
- Suleimanov, B. A., Guseynova, N. I., Veliyev, E. F. (2017, October). Control of displacement front uniformity by fractal dimensions. SPE-187784-MS. In: SPE Russian Petroleum Technology Conference. Society of Petroleum Engineers.
- Suleimanov, B. A., Veliyev, E. F., Naghiyeva, N. V. (2020). Preformed particle gels for enhanced oil recovery. International Journal of Modern Physics B, 34(28), 2050260.
- Veliyev, E. F. (2021). A combined method of enhanced oil recovery based on ASP technology. Prospecting and Development of Oil and Gas Fields, (4 (81)), 41-48.
- Veliyev, E. F., Aliyev, A. A., Mammadbayli, T. E. (2021). Machine learning application to predict the efficiency of water coning prevention. SOCAR Proceedings, 1, 104-113.
- Suleimanov, B. A., Veliyev, E. F., Aliyev, A. A. (2021). Impact of nanoparticle structure on the effectiveness of pickering emulsions for EOR applications. ANAS Transactions, (1), 82-92.
- Ismailov, R. G., Veliev, E. F. (2021). Emulsifying composition for increase of oil recovery efficiency of high viscous oils. Azerbaijan Oil Industry, (5), 22-28.
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DOI: 10.5510/OGP20220100631
E-mail: ilhame7007@gmail.com
F. S. Ismayilov1, Q. Q. Ismayilov2, N. M. Safarov1
1«OilGasScientificResearchProject» Institute, SOCAR, Baku, Azerbaijan; 2Azerbaijan State University of Oil and Industry, Baku, Azerbaijan
On the possibility of regulation of rheophysical properties multicomponent mixtures based on rheotechnology
The article deals with the regulation of the rheophysical properties of multicomponent mixtures on the basis of the purposeful application of a new direction in science-rheotechnology. The data of rotoviscometry once again confirmed that the sequence of mixing the constituent components of the oil-water-sand mixture directly affects the rheology of the newly formed systems. The method of changing the order of entering the constituent components shows the prospects for increasing the efficiency of the processes of extraction, collection and transport of oils and their mixtures based on the creation of new rheological methods based on the regulation of the rheophysical properties of the heterophase systems under consideration.
Keywords: constituent components of the mixture; rheology; structural viscosity; anomalous index; graph-analytical method.
References
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- Ismayilov, G. G., Safarov, N. M. (2011). To the question of studying the effect of free-flowing fillers on the rheological properties of oil-water emulsions. Proceedings of High Technical Educational Institutions of Azerbaijan, 3(73), 26-32.
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- Ismayilov, G. G., Safarov, N. M. (2010). Rheotechnology of viscous-free systems (monography). Baku: MSM.
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DOI: 10.5510/OGP20220100632
E-mail: natik_safarov@mail.ru
V. M. Shamilov
SOCAR, Баку, Азербайджан
Production of modified multi-walled carbon nanotubes and their application for stimulation from oil recovery
In the presented work, the possibility of using modified multi-walled carbon nanotubes (MWCNTs) as reagents for increasing the oil recovery factor is considered. Carbon nanotubes were obtained by the method of chemical combination from the gas phase. Ethylene was used as the raw material. Further, the nanotubes were modified to obtain a stable aqueous MWCNT ash, subsequently used as an additive to the polyacrylamide solution.
Keywords: nanotechnologies; multi-walled carbon nanotubes; oil recovery enhancement.
References
- Veliyev, E. F. (2021). Polymer dispersed system for in-situ fluid diversion. Prospecting and Development of Oil and Gas Fields, 1(78), 61-72.
- Suleimanov, B. A., Veliyev, E. F., Naghiyeva, N. V. (2021). Colloidal dispersion gels for in-depth permeability modification. Modern Physics Letters B, 35(01), 2150038.
- Suleimanov, B. A., Guseynova, N. I., Veliyev, E. F. (2017, October). Control of displacement front uniformity by fractal dimensions. SPE-187784-MS. In: SPE Russian Petroleum Technology Conference. Society of Petroleum Engineers.
- Suleimanov, B. A., Veliyev, E. F., Naghiyeva, N. V. (2020). Preformed particle gels for enhanced oil recovery. International Journal of Modern Physics B, 34(28), 2050260.
- Veliyev, E. F., Aliyev, A. A. (2021, October). Propagation of nano sized CDG deep into porous media. SPE-207024-MS. In: SPE Annual Caspian Technical Conference. Society of Petroleum Engineers.
- Suleimanov, B. A., Veliyev, E. F., Aliyev, A. A. (2021). Impact of nanoparticle structure on the effectiveness of pickering emulsions for eor applications. ANAS Transactions, (1), 82-92.
- Suleimanov, B. A., Veliyev, E. F. (2016). The effect of particle size distribution and the nano-sized additives on the quality of annulus isolation in well cementing. SOCAR proceedings, 4, 4-10.
- Suleimanov, B. A., Dyshin, O. A., Veliyev, E. F. (2016, October). Compressive strength of polymer nanogels used for enhanced oil recovery EOR. SPE-181960-MS. In: SPE Russian Petroleum Technology Conference and Exhibition Society of Petroleum Engineers.
- Veliyev, E. F., Aliyev, A. A., Mammadbayli, T. E. (2021). Machine learning application to predict the efficiency of water coning prevention. SOCAR Proceedings, 1, 104-113.
- Shamilov, V. M., Babayev, E. R., Aliyeva, N. F. (2017). Polymer nanocomposites based on carboxymethylcellulose and nanoparticles (Al and Cu) for enhanced oil recovery. Oil and Gas Territory, 3, 14-15.
- Suleimanov, B. A., Ismaylov, F. S., Veliyev, E. F. (2014). On the metal nanoparticles effect on the strength of polymer gels based on carboxymethyl cellulose, applying at oil recovery. Oil Industry, 1, 86-88.
- Alsaba, M. T., Al Dushaishi M. F., Abbas A. K. (2020). A comprehensive review of nanoparticles applications in the oil and gas industry. Journal of Petroleum Exploration and Production Technology, 10, 1389-1399.
- Shamilov, V. M. (2020). Potential applications of carbon nanomaterials in oil recovery. SOCAR Proceedings, 3, 90-107.
- Feng, Y., Liu, S., Liu, H., et al. (2018). Study on mechanical performance of set cement modified with CNT. Drilling Fluid and Completion Fluid, 35(6), 93-97.
- Hajiabadi, S. H., Aghaei, H., Kalateh-Aghamohammadi, M., Shorgasthi, M. (2020). An overview on the significance of carbon-based nanomaterials in upstream oil and gas industry. Journal of Petroleum Science and Engineering, 186, 106783.
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DOI: 10.5510/OGP20220100633
E-mail: valeh.shamilov@socar.az
Sh. P. Kazimov
«OilGasScientificResearchProject» İnstitute, SOCAR, Baku, Azerbaıjan
Enhanced oil recovery in water-flooded and hard to recover reservoirs
The article is devoted to enhanced oil recovery (EOR) by displacement of residual oil with chemical agents in hard to recover reservoirs. SOCAR Oil Refinery alkaline waste (AW) is used as chemical product for EOR in the researches. Researches were carried out on pure AW and its solutions in different densities. 10% solution of water with AW decreases interfacial tension from 27 mN/m to 1.0 mN/m. PH value respectively increases from 7.5 to 9.5. Then, the researches were performed in simulated reservoir model. Primarly, the interlayer was created from solutions with AW in different densities, and then the displacement was carried out. Final oil recovery rate was 0.453 during oil displacement without AW. This ratio was respectively 0.54, 0.571 and 0.573 during displacement of oil with 5%, 10%, 15% solutions of AW. EOR with AW solution was carried out in QLD4 horizon in Goshanohur area of Balakhany-Sabunchu-Ramana oil field. 2500 tons incremental oil was produced.
Keywords: enhanced oil recovery; residual oil; oil displacement; oil field; well.
References
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DOI: 10.5510/OGP20220100634
E-mail: shukurali.kazimov@socar.az
A. R. Deryaev
Scientific-Research Institute of Natural Gas, SC «Turkmengaz», Ashgabat, Turkmenistan
Well design development for multilayer horizons for the simultaneous separate operation by one well
The positive effects of applying the technology for simultaneous separate operation (hereinafter referred to as SSO) include the reduction in capital investments for the construction of wells for each of the operational facilities, the cutback of operating costs and the development period of a multi-layer horizon, the increase in hydrocarbon production and the final oil recovery period from profitable operation of wells. In addition, the use of this technology contributes to increasing the utilization rate of downhole equipment and enhancing the reliability of the downhole device. The simultaneous separate operation technology is economically efficient due to the production of additional oil, a high profitability index and a low payback period.
Keywords: azimuth, zenith angle; off-vertical; well profile; doublelift tubing; liner filter; packers; valves.
References
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DOI: 10.5510/OGP20220100635
E-mail: burawtehnik@yandex.com
A. A. Shiraliev
PA «Azneft», SOCAR, Baku, Azerbaijan
Hydrogasdynamic modeling of optimization of underground gas storage development
On the basis of large-scale gas-hydrodynamic balance models, the problem of optimizing the cyclic development of underground gas storage (UGS) facilities has been formulated and solved. An algorithm has been developed that allows optimal control of the UGS development process, taking into account the limitations on the flow rates of certain wells. For its implementation, a specific model structure of the Kalmaz UGS facility was selected. It is shown that optimal regulation of the values of flow rates and depressions of wells ensures minimal flooding of well products during the extraction of total gas, the values of reception and repression of wells ensure maximum removal of the gas-water boundary from the bottom of the well during the injection of total gas.
Keywords: optimization; underground gas storage; extraction; injection; flow rate; depression; repression.
References
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DOI: 10.5510/OGP20220100636
E-mail: shiraliyev.alam@gmail.com
E. F. Veliyev1,2, A. A. Aliyev1
1«OilGasScientificResearchProject» Institute, SOCAR, Baku, Azerbaijan; 2«Composite Materials» Scientific Research Center, Azerbaijan State University of Economics (UNEC), Baku, Azerbaijan
Comparative analysis of the geopolymer and Portland cement application as plugging material under conditions of incomplete displacement of drilling mud from the annulus
Portland cement is traditionally used in cementing of oil and gas wells. However, Portland cement has a number of shortcomings. The most important of these are the formation of microannuli between the cement plug and the rock or casing, as well as the formation of cracks and permeable channels in the cement matrix. Recent research shows that geopolymer can be a perspective alternate to portlandcement by overcoming beforementioned issues. The article comparatively analyzes the changes in the parameters of plugging materials containing geopolymer and Portland cement while contamination with water-based drilling mud. The results show that geopolymerbased solutions are more resistant to contamination with water-based drilling mud than Portland cement-based solutions. Thus, mixing Portland cement slurry with water-based drilling mud increases its viscosity and fluid loss, and sharply reduces its compressive strength. However, when a geopolymer solution is mixed with a water-based drilling fluid, its viscosity is almost unchanged, its fluid loss is reduced, and reduction in its compressive strength is less than in Portlandcement based material.
Keywords: portland cement; geopolymer; fly ash; cementing; water based mud; mud contamination.
References
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DOI: 10.5510/OGP20220100637
E-mail: elchinf.veliyev@socar.az