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Drilling and development of hydrocarbon fields

Oil flow dynamics with respect for formation of gas bubbles in the flow
Mikhailov D.N.
Drilling and development of hydrocarbon fields
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Authors: Dmitry N. MIKHAILOV (b. 1974). Education: Moscow State University, Physics Department (1997) and Computational Mathematics and Cybernetics Department (1997). Current Job: PhD, Senior Research Scientist, Institute of Earth Physics, Russian Academy of Sciences. Scientific interests: multiphase multicomponent fluid flow through porous medium, wave propagation in porous medium. Avtor 27 publications. E-mail: dmikh@yandex.ru

Abstract: Mathematical models of oil-gas flow with respect for the effects of gas bubbles micronuclei or microbubbles formation in oil: oil by-passing pore walls (gas-film lubrication), oil viscosity variations, oil-gas bubbles relative motion. Two cases are considered: oil flow in the vicinity of the borehole with the pressure approaching the saturation pressure resulting in the formation of micronuclei and bubbles of gas; water alternated gas injection resulting in oil foaming in the area of contact with the injected gas and formation of «oil + gas bubbles» fine-dispersed mixture. Models of IPR curves behavior of an oil well during gas bubbles formation as well as those of gas bubbles effect on the dynamics of oil recovery factor under water alternated gas injection are presented

Index UDK: 531.4

Keywords: Porous medium, Oil deposit, Gas bubbles, partial de-gassing, water alternated gas injection, indicator diagram

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An estimation of production rate of horizontal well exposed geterogenous multitarget field
Aliyev Z.S.
Rebrikov A.A.
Drilling and development of hydrocarbon fields
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Authors: Zagid S. ALIYEV was born in 1935, graduated form the Industrial Institute in Baku. He got the degree of Candidate of Technical Sciences in 1964, became Doctor of Technical Sciences in 1984. Нe is professor of the Department of the Development and Operation of Gas and Gas Condensate Fields at Gubkin Russian State University of Oil and Gas, member of the Russian Academy of Natural Sciences. He published 341 works including 52 monographs. E-mail: biblioteka@gubkin.ru
Andrey A. REBRIKOV was born in 1983. He graduated from Gubkin Russian State University of Oil and Gas, Candidate of Technical Sciences. He works as an engineer at JSC “Smith International CIS”, published 15 works. E-mail: biblioteka@gubkin.ru

Abstract: As a rule well flow rates are determined as average along layer thickness due to the lack of detailed interval information under completion of heterogeneous strata. Well flow rates and coefficient values for the linear component of the gas influx equation in a horizontal well are estimated. The reliability of the estimate of the horizontal well flow rate was verified by the «accurate» numerical method using extended linear filtration law by modeling the strip domain of the well exposed by the horizontal hole. This allowed to identify the rate of influence of the quadratic component of the equation of gas influx into the horizontal well. The results of the mathematical experiments allow to identify relatively small errors of the effect of the quadratic component of the equation of gas influx into the horizontal well and thus to reduce the time of survey of these wells by reducing the number of the modes of operation and loss of gas during the surveys.

Index UDK: 622.279

Keywords: heterogenous stratum, Connectivity, thin formations, average weighted parametres, Horizontal well, Understatement, overstatement, average flow rate, total flow rate, partial penetration into the well domain, flow rate under partial penetration

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Exploration maturity and necessity of developing new methods and technologies of surveying vertical and horizontal gas wells
Aliyev Z.S.
Drilling and development of hydrocarbon fields
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Authors: Zagid S. ALIYEV was born in 1935, graduated form the Industrial Institute in Baku. He got the degree of Candidate of Technical Sciences in 1964, became Doctor of Technical Sciences in 1984. Нe is professor of the Department of the Development and Operation of Gas and Gas Condensate Fields at Gubkin Russian State University of Oil and Gas, member of the Russian Academy of Natural Sciences. He published 341 works including 52 monographs. E-mail: biblioteka@gubkin.ru

Abstract: The authors believe that the current theory and practices of surveying gas and gas condensate wells cannot ensure reliable information about the reservoir parameters. This is connected with: lack of conditions for full stabilization of pressure and flow rate under well operating conditions; invalid theory of gas influx: lack of conditions of pressure and flow rate stabilization under fan and cluster well pattern. In view of the above mentioned factors a new method and practice of horizontal and vertical gas wells surveying is proposed. The problems to be solved in connection with gas-hydrodynamic surveys of gas and gas condensate wells under steady-state filtration modes are identified

Index UDK: 622.279

Keywords: new methods, Vertical, Horizontal, Well, filtration theory, method of survey, pressure and flow rate stabilization, reservoir segment, Strip, sector, Exposure depth, fan pattern, faults, Interaction, first and second phases, universal relationships

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Percolation analysis of the limits of applicability of the linear filtration law
Kadet V.V.
Chagirov P.S.
Drilling and development of hydrocarbon fields
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Authors: Valery V. KADET (b. 1953) doctor of technical sciences, head of Dept. Petroleum and Reservoir Hydromechanics at Gubkin Russian State University of Oil & Gas. Honorary worker of oil and gas industry, Full Member of the Russian Academy of Natural Sciences. Sphere of academic interests — percolation modeling of transfer processes in porous media and deve-lopment of foundations for improved well productivity technology. Published over 150 works including 4 monographs, 14 textbooks and teaching aids. E-mail: kadetvvl@gubkin.ru
Paul S. CHAGIROV was born in 1988, graduated from Gubkin Russian State University of Oil and Gas (BS) in 2010. He is presently doing his Master’s degree at the Faculty of Development and Exploitation of Oil and Gas Fields at Gubkin Russian State University of Oil and Gas, 10 publications. E-mail: biblioteka@gubkin.ru

Abstract: The percolation flow of Newtonian fluids in porous media was simulated. Flow analysis at the micro level has yielded macroscopic filtration law, as well as the critical values of pressure gradients, which determine the limits of applicability of Darcy's law. The influence of environmental parameters on the values of threshold gradients was studied. It is shown that at high pressure gradients Darcy's law works well in most finely porous reservoirs and does not apply over the whole range of gradients for macroporous rocks, while at low gradients the linear filtration law is only true for macroporous rocks.

Index UDK: 532.546.7

Keywords: newtonian fluid flow in porous media, percolation model, Darcy's law

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Modeling productivity of oil wells with complex trajectories of horizontal trunk
Domanyuk F.N.
Drilling and development of hydrocarbon fields
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Authors: Fedor N. DOMANYUK was born in 1985, graduated from Gubkin Russian State University of Oil and Gas in 2008, he is postgraduate student of the Department of Development and Exploitation of Oil Fields. He published 6 works on oil and gas fields development. E-mail: fedor.domanyuk@gmail.com

Abstract: In recent years it has been widely accepted to develop hydrocarbon deposits widely by wells with complex trajectories. The article presents the exact and approximate analytical solutions for determining the productivity of wells with a sinusoidal profile and serpentine trunk. The obtained results allow to quantify the influence of various factors on the production capabilities of figurine wells. Simple criteria for evaluating the effectiveness of the figurine of wells in different geological and physical conditions are suggested.

Index UDK: 622.24

Keywords: productivity, wells with figurine horizontal section, anisotropic layer, stationary filtration

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Approximate method for determining performance of horizontal gas well with partial penetration into deposit fragment in the form of sector
Aliyev Z.S.
Kotlyarova E.M.
Kotlyarov V.N.
Drilling and development of hydrocarbon fields
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Authors: Zagid S. ALIYEV was born in 1935, graduated form the Industrial Institute in Baku. He got the degree of Candidate of Technical Sciences in 1964, became Doctor of Technical Sciences in 1984. Нe is professor of the Department of the Development and Operation of Gas and Gas Condensate Fields at Gubkin Russian State University of Oil and Gas, member of the Russian Academy of Natural Sciences. He published 341 works including 52 monographs. E-mail: rgkm@gubkin.ru
Elena M. KOTLYAROVA graduated from Gubkin Russian State University of Oil and in 1988, and in 2006 defended thesis on “Development of methods of research and technology of operation of horizontal gas wells, which penetrated into heterogeneous low-productivity reservoirs (for ONGKM case study)”. She is Associate professor of the Department of Development and Exploitation of Gas and Gas Condensate Fields at Gubkin Russian State University of Oil and Gas, author of more than 20 scientific papers on the development of natural gas fields using horizontal wells. E-mail: kotlyarova_gubkin@mail.ru
Vladimir N. KOTLYAROV was born in 1962, graduated from Gubkin Russian State University of Oil and Gas in 1988 He is Head of the Laboratory of Geological and Hydrodynamic Modeling and Integrated Analysis of Wells of ITC Gazprom UGS. He is Postgraduate student of the Department of Development and Exploitation of Gas and Gas Condensate Fields at Gubkin Russian State University of Oil and Gas. E-mail: V.Kotlyarov@phg.gazprom.ru

Abstract: An approximate method for determining with an acceptable accuracy the performance of a horizontal gas well with partial penetration into the deposit in the form of a sector is proposed. To be able to determine the flow rate of a horizontal well, which penetrated into a fragment of a homogenous reservoir in the form of a sector a sector, we propose a method of replacing the sector with strip elements. The flow rate of these can be calculated using the formula for fully opened fragments.

Index UDK: 622.279

Keywords: horizontal well; fan drilling, sector penetration; penetration degree; flow rate of horizontal wells; sector element; strip fragment, average radius; variable radius; drainage area; coefficients of filtration resistance

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System aspects of well construction management
Balaba V.I.
Drilling and development of hydrocarbon fields
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Authors: Vladimir I. BALABA was born in 1954, graduated from Gubkin Russian State University of Oil and Gas in 1979. He is Doctor of Technical Sciences, Professor of the Department of Drilling of Oil and Gas Wells Gubkin Russian State University of Oil and Gas. He is author of 162 scientific publications including 18 monographs and textbooks in the field of drilling, quality management and safety of industrial operations. E-mail: balaba@gubkin.ru

Abstract: Given the use of different organizational models for the construction of wells, two levels of wells quality control − the strategic and operational – are identified. Strategic management is carried out by updating quality requirements basing on the analysis of the experience of operating wells. Operational management is the management of a specific drilling system that is drilling of wells in order to achieve design quality indicators. In the case of the general contractor this is the function of drilling contractor, whereas with an integrated contract this is the function of license holder.

Index UDK: 622.24

Keywords: construction of wells, drilling system, wells quality control

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