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2018/1
Preparation of X-ray tomography data for fluidodynamics modeling in low-permeable rocks
Geosciences

Authors: Andrey A. ABROSIMOV graduated from Gubkin Russian State University of Oil and Gas in 2013. He is Candidate of Technical Sciences, engineer of the Department of Oil Field Development and Operation of Gubkin Russian State University of Oil and Gas (National Re-search University). His research interests include X-Ray tomography, petrophysics oil and gas reservoirs. He is author of more than 20 scientific publications and 3 copyright certificates. E-mail: abrosimov.aa@inbox.ru
Yevgenyi V. SHELYAGO (b. 1985) graduated from Gubkin Russian State University of Oil and Gas in 2008, engineer of the Department of Oil Field Development and Operation of Gubkin Russian State University of Oil and Gas (National Research University). Specialist in reservoir physics and enhanced oil recovery. He is author of more than 30 scientific publications.
E-mail: thelgp@yandex.ru
Irena V. YAZYNINA graduated from Lomonosov Moscow State University in 1975. He is Candidate of Technical Sciences, assistant professor of the Department of Oil Field Deve-lopment and Operation of Gubkin Russian State University of Oil and Gas (National Research University). Specialist in reservoir physics and enhanced oil recovery. She is author of more than 50 scientific publications.
E-mail: yazynina@mail.ru

Abstract: Using X-ray tomography data to calculate rock properties is a promising direction in petrophysics. However, when calculating filtration characteristics, researchers face various problems and limitations, one of which is insufficient resolution of X-ray tomographs, which does not allow registering pores and channels that are smaller than the resolving capacity of the device. This leads to the fact that the model of pore space loses its connection, and therefore it becomes impossible to carry out mathematical modeling at the pore scale by evaluating the filtration characteristics of rocks. The algorithm for restoring the connectivity of the pore space model is described. This allows modeling fluids and calculating the reservoir properties of rocks in conditions of restricted resolution of X-ray tomography. The working capacity of the proposed method is checked. Thus, the proposed method of preparing X-ray tomography data allows obtaining the result quickly and without additional studies, which ultimately expands the field of application of X-ray tomography

Index UDK: 552.1:53

Keywords: X-ray tomography, pore space, permeability, low-permeability reservoir, petrophysical relationships

Bibliography:
1. Abrosimov A.A. Х-ray tomography for study of oil and gas reservoir systems. Trudy RGU nefti i gaza imeni I.M. Gubkina [Proceedings of Gubkin Russian State University of Oil and Gas], 2015, no. 4/281, p. 5-15 (in Russian).
2. Beljakov M.A., Jazynina I.V., Abrosimov A.A. The impact of secondary dolomitization on properties of oil and gas reservoirs. Neftjanoe hozjajstvo [Oil Industry>], 2015, no. 6, p. 24-27 (in Russian).
3. Zhuravlev A.V., Vevel’ Ja.A. Possibilities of use of computer microtomography in micropale-ontological and lithological studies. Neftegazovaja geologija. Teorija i praktika [Oil and gas geology. Theory and practice], 2012, t. 7, no. 2, p. 1-13 (in Russian).
4. Romm E.S. Structure models of rocks pore space. L.: Nedra, 1985, 240 p.
5. Hozjainov M.S. Vajnberg Je.I. Computational microtomography is a new information technology for non-destructive investigation of the internal microstructure of geological rocks. Geoinformatika [Geoinformatics], 1992, no. 1, p. 42-50 (in Russian).
6. Chugunov S.S., Kazak A.V., Cheremisin A.N. Integration of X-ray micro-computed tomography and focused-ion-beam scanning electron microscopy data for pore-scale characterization of Bazhenov formation, Western Siberia. Neftjanoe hozjajstvo [Oil Industry], 2015, no. 10, p. 44-49 (in Russian).
7. Jazynina I.V., Sheljago E.V., Abrosimov A.A., Veremko N.A., Grachev N.E., Senin D.S. No-vel approach to core sample MCT research for practical petrophysics problems solution. Neftjanoe hozjajstvo [Oil Industry], 2017, no. 1, p. 19-23 (in Russian).
8. Jazynina I.V., Sheljago E.V., Abrosimov A.A., Veremko N.A., Grachev E.A., Bikulov D.A. Testing a new approach to petrophysical trend determination from X-Ray tomography. Neftjanoe hozjajstvo [Oil Industry], 2017, no. 2, p. 36-40 (in Russian).
9. Dong H., Blunt M. Pore-network extraction from micro-computerized-tomography images. Physical Review E80, 2009, no. 036307.
10. Garcia X., Akanji L.T., Blunt M.J., Matthai S.K., Latham J.P. Numerical study of the effects of particle shape and polydispersity on permeability. Physical Review E80, 2009, no. 021304.
11. Qingrong Xiong, Todor G. Baychev, Andrey P. Jivkov Review of pore network modelling of porous media: Experimental characterisations, network constructions and applications to reactive transport. Journal of Contaminant Hydrology, 2016, no. 192, p. 101-117.

Authors: Anatoly B. ZOLOTUKHIN was born in 1946. He graduated from Gubkin Moscow Institute of Petrochemical and Gas Industry in 1969, and Lomonosov Moscow State University in 1977. He is Full Professor of the Department of Oil Field Development, Doctor of Technical Sciences. He is specialist in the development of oil and gas fields and enhanced oil recovery, author of more than 140 scientific publications and 19 monographs. E-mail: anatoly.zolotukhin@gmail.com
Petr V. PYATIBRATOV was born in 1979. He graduated from Gubkin Russian State University of Oil and Gas in 2002, Candidate of Technical Sciences, Associate Professor of the Department of Oil Field Development of Gubkin Russian State University (National Research University) of Oil and Gas. He is specialist in the development and hydrodynamic modeling of oil and gas fields, author of more than 30 scientific publications. E-mail: pyatibratov.p@gmail.com
Larisa N. NAZAROVA graduated from Gubkin Moscow Institute of Petrochemical and Gas Industry in 1979, she is Candidate of Technical Sciences, Associate Professor of the Department of Oil Field Development of Gubkin Russian State University (National Research University) of Oil and Gas. She is specialist in the development of oil and gas fields and enhanced oil recovery, author of more than 50 scientific publications. E-mail: nazarova-ln@irmu.ru
Irena V. YAZYNINA graduated from Lomonosov Moscow State University in 1975. She is Candidate of Geological-Mineralogical Sciences, Associate Professor of the Department of Oil Field Development of Gubkin Russian State University (National Research University) of Oil and Gas. She is specialist in the petrophysics and enhanced oil recovery, author of more than 50 scientific publications. E-mail: yazynina@mail.ru.
Evgeny V. SHELYAGO was born in 1985. He graduated from Gubkin Russian State University of Oil and Gas in 2008, Candidate of Technical Sciences, Senior Lecturer of the Department of Oil Field Development of Gubkin Russian State University (National Research University) of Oil and Gas. He is specialist in the petrophysics and enhanced oil recovery, author of 14 scientific publications. E-mail: thelgp@yandex.ru

Abstract: The paper overviews the problems selection of enhanced oil recovery (EOR) methods with account for reservoir geological and physical conditions. Applicability criteria for thermal, gas and chemical EOR are presented. The set of criteria is based on national and international secondary and tertiary EOR projects results. A ternary logic method is proposed and tested for EOR screening. This method of perspective EOR estimation was tested for the conditions of more than 100 formations of 15 fields located in one of Eurasia regions. It is noted that of the EOR applicability should assessed at early stages of the field development design

Index UDK: 622.279

Keywords: hard to recover reserves, EOR methods, applicability criteria, complicating factors, fuzzy ternary logic, EOR screening

Bibliography:
1. Surguchev M.L. Vtorichnye i tretichnye metody uvelichenija nefteotdachi plastov. M.: Nedra, 1985, 308 р.
2. Muslimov R.H. Sovremennye metody povyshenija nefteizvlechenija: proektirovanie, optimizacija i ocenka jeffektivnosti: Uchebnoe posobie. Kazan’: izdatel’stvo „FJeN” Akademii nauk R.T., 2005, 688 p.
3. Antoniadi D.G. Teorija i praktika razrabotki mestorozhdenij s vysokovjazkimi neftjami. Krasnodar: „Sovetskaja Kuban”, 2004, 336 p.
4. Krjanev D.Ju., Zhdanov S.A. Primenenie metodov uvelichenija nefteotdachi plastov v Rossii i za rubezhom. Opyt i perspektivy. Burenie i neft’, 2011, no. 2.
5. Krjanev D.Ju., Zhdanov S.A. Metody uvelichenija nefteotdachi: opyt i perspektivy primenenija. Neftegazovaja vertikal’, 2011, no. 5.
6. Eremin N.A., Zolotuhin A.B., Nazarova L.N., Chernikov O.A. Vybor metoda vozdejstvija na neftjanuju zalezh’. M.: GANG, 1995, 190 p.
7. Zheltov Yu.P., Zolotuhin A.B., Eremin H.A., Nazarova L.N. Sistema avtomatizirovannogo proektirovanija razrabotki neftjanyh mestorozhdenij (SAPR RNM) s primeneniem teplovyh metodov uvelichenija nefteotdachi. Razvitie i sovershenstvovanie sistem razrabotki neftjanyh mestorozhdenij. M.: Nauka, 1989, p. 119-131.
8. Favennec Jean-Pierre The Economics of EOR. Сonference of Enhanced Oil Recovery (EOR), 6 December 2004, London, UK.
9. Alvarado V., Thyne G., and Murrell G. SPE Annual Technical Conference and Exhibition. Screening Strategy for Chemical Enhanced Oil Recovery in Wyoming Basins. Denver, Colorado, USA, 21-24 September, 2008.
10. Alvarado V., Manrique E. Enhanced Oil Recovery: An Update Review. Energies, 2010, vol. 3, no. 9, p. 1529-1575.
11. Taber J.J., Martin F.D., Seright R.S. EOR Screening Criteria Revisted — Part 1: Introduction to Screening Criteria and Enhanced Recovery Field Projects. SPE Reservoir Engineering, August, 1997, p. 189-198.
12. Taber J.J., Martin F.D., Seright R.S. EOR Screening Criteria Revisted — Part 2: Applications and Impact of Oil Prices. SPE Reservoir Engineering, August, 1997, p. 199-205.

2009/1
Specific behavior of natural hydrocarbon systems subject to crystallization and vitrifying under temperature changes
Oil and gas processing, chemistry of oil and gas

Authors: Yevgenyi V. SHELYAGO (b. 1985) graduated from Gubkin Russian State University of Oil and Gas 2008, engineer of Dept. of oil field development at Gubkin Russian State University of Oil and Gas. 7 publications.
Irena V. YAZYNINA (b. 1953) graduated from Lomonosov Moscow State University, assistant professor of Dept. of oil field development at Gubkin Russian State University of Oil and Gas. 40 publications. E-mail: biblioteka@nedrainform.ru

Abstract: The work reviews a device, which allows concurrent registration of oil or oil product sample's temperature and intensity of light, reflected on it. The ability of crystallization phase transfer identification by the device on base of n-alcanes and their binary systems is presented. Phase diagram of C10H22−C20H42 binary system was received. Different oil behavior during freezing is overviewed with respect for crystallization or vitrification. The ability of the method to determine the freezing point in vitrifying oils is presented.

Index UDK: 665.6/.7

Keywords: crystallization, vitrifying, phase formation

Bibliography: