The article deals with the stages and peculiarities of the development of the Kalamkas field. Geological risks, uncertainties, probabilistic estimates of reserves, etc. were studied. Reliability of research results is established on the basis of the constructed geologicalhydrodynamic models. To eliminate, uncertainties in the parameters, additional geological-geophysical and well-logging studies of wells are carried out.

Keywords: Geological risks; Probabilistic estimates; Estimates of reserves; Geological-hydrodynamic model; Multivariate modeling.

References

1. F.V.Rahimov, A.M.Hajiyev, E.G.Akhmedov. Analysis of geological risks in the probabilistic assessment of oil reserves //News of Azerbaijan HTEI. ASOIU. –2015. –No. 5(99). –P. 11-15.
2. O.S.Krasnov. The theory and practice of probability estimation of geological risks and uncertainties in preparing oil and gas reserves //Petroleum Geology - Theoretical and Applied Studies. –2009. –No. 4.
3. K.E.Zakrevsky. Geological 3D modeling. M.: OOO IPTs Maska, 2009.
4. F.A.Grishin. Podschet zapasov nefti i gaza v SShA. M.: Nedra, 1993.
5. V.B.Levyant, Yu.P.Ampilov, V.M.Glogovskiy i dr. Metodicheskie rekomendatsii po ispolzovaniyu dannyih seysmorazvedki (2D, 3D) dlya podscheta zapasov nefti i gaza. M.: MPR RF, 2006.
6. R.N.Bahtizin, R.M.Karimov, B.N.Mastobaev. The general form of the flow curve of oil and universal rheological model //SOCAR Proceedings. -2016. -№2. –Р.43-49.
7. A.M.Salmanov. Estimation of the reserves of longdeveloped deposits based on dynamic and statistical models //News of Azerbaijan HTEI. ASOIU. –2007. –No. 4(50). –P.11-16.
8. A.M.Salmanov. Estimation of recoverable oil reserves using the S-curve method with variable asymptotes //News of Azerbaijan HTEI. ASOIU. –2005. –No. 1(35). –P. 27-31.
9. T.I.Badoev, L.I.Shahovoy i dr. Podschet zapasov nefti i gaza po mestorozhdeniyu «Kalamkas» Mangyishlakskoy oblasti KazSSR po sostoyaniyu na 1 iyunya 1979g. Gurev: KazNIGRI, KE MNGR, 1979.

Based on the regional study of the hydrochemical field nature (Bukhara-Khiva formation waters), by reference to specific features of the vertical and horizontal waters zonality, hydrochemical zoning of the fluids of the Cretaceous and Jurassic water drive systems was revealed in some of its gas-oil regions. This allows us to recognize the changes in the groundwaters’ chemical composition and to assess the fluid migration, as well as its impact on the process of hydrocarbon deposits generation. From the general geological positions it is noteworthy as a search criterion when making a selection of the reasonable exploration trend in specific geological features.

Keywords: deposit; oil-and-gas content; hydrochemistry; zoning, deposits; formation water; mineralization; horizon; migration.

References

1. H.T.Tulyaganov, V.A.Kudryakov, S.Talipov i dr. Gidrogeologiya neftegazonosnosnyh oblastej Uzbekistana. M.: Nedra, 1973.
2. V.N.Pashkovskij, I.V.Kushnirov. K voprosu o sovremennom estestvennom sostoyanii vodonapornoj sistemy Buharo-Hivinskoj gazoneftyanoj oblasti. Vyp. 2. T.: SredazNIIgaz, 1965.
3. N.I.Popov, K.N.Fedorov, V.M.Orlov. Morskaya voda. Spravochnoe rukovodstvo. M.: Nauka, 1979.
4. B.P.Stavickij, A.R.Kurchikov, A.E.Kontorovich i dr. Vertikal'naya i lateralnaya gidrohimicheskaya zonal'nost', tipizaciya podzemnyh vod Zapadno-Sibirskogo bassejna //Geologiya, geofizika i razrabotka neftyanyh i gazovyh mestorozhdenij. -2006. -№ 5-6.
5. V.A.Krotova. Neftepoiskovye gidrogeologicheskie kriterii. L.: Nedra,1969.
6. T.H.Shojmuratov. Gidrohimicheskaya zonalnost podzemnyh vod melovyh i yurskih obrazovanij Buharo-Hivinskogo regiona v svyazi s ocenkoj perspektiv ih neftegazonosnosti» //Uzbekskij zhurnal nefti i gaza. -2014. -№3. -S.27-34.

The paper considers the results of the field tests on enhanced oil recovery of stratified heterogeneous producing reservoirs with overflows using the technology of reservoir stimulation with the help of a thermoactive polymer composition. This technology allows limiting the movement of water in high permeability zones of the reservoir, correspondingly, to reduce water production in watered areas, improve oil displacement, and increase the final oil production factor using smaller volumes of the agent and with a slight change in injection pressure. Standard equipment and existing injection system are used for injection of chemical agents. Implementation of the technology was carried out on the test plots of the V block of the Neft Dashlary offshore field for the wells operating from the X horizon and of Pirallakhi onshore oil field for the wells operating from the productive horizon of the KS_u.

Keywords: Thermoactive polymer composition; Increase in stimulation coverage; Stratified heterogeneous reservoir; Intrastratal overflows; Enhanced oil recovery; Well interference.

References

1. I.M.Araslanov. Primenenie invertnyih emulsiy i PAV dlya OVP //Inzhenernaya praktika. -2011. –No. 7. -C. 75-76.
2. J.Pritchett, C.Pacific, H.Frampton et al. Field application of a new in-depth waterflood conformance improvement tool //Paper SPE 84897 presented at the SPE International Improved Oil Recovery Conference in Asia Pacific, Kuala Lumpur, Malaysia, 20-21 October 2003.
3. D.Denney. Improving sweep efficiency at the Mature Koluel Kaike and Piedra Clavada waterflooding projects, Argentina //Journal of Petroleum Technology. –2008. –Vol. 60. –Issue 1.
4. H.Frampton, J.C.Morgan, S.K.Cheung et al. Development of a novel waterflood conformance control system //Paper SPE 89391 presented at the SPE/DOE Symposium on Improved Oil Recovery, Tulsa,
   Oklahoma, 17-21 April 2004.
5. B.A.Suleimanov, F.S.Ismailov, N.I.Guseinova. Prediction of oil production during the second and the tertiary impact on a deposit with account of wells interferention //Oilfield Engineering. –2015. –No.2. –P. 20-23.
6. V.M.Entov. Teoriya filtratsii //«Sorosovskiy obrazovatelnyiy zhurnal». –1998. –No. 2. –C.121-128.
7. M.Muskat. The flow of homogeneous fluids through porous media. Michigan: I.V.Edwards, INC. ANN ARBOR, 1940.
8. K.S.Basniev, A.M.Vlasov, I.N.Kochina, et al. Underground hydraulics. M.: Nedra, 1986.
9. TR 1669347-90-2014. An application of the new compositions for increasing an effectiveness of water injection into the reservoir. «OilGasScientificResearch Project» Institute, SOCAR, 2014.
10. M.M.Isgandarov. Integrated interpretation of well logging results in the study of terrigeneous sections //SOCAR Proceedings. –2014. –No.3. –P.4-10.
11. N.I.Guseynova, А.А.Gajiyev, А.Т.Samedzade. Onperspectives of further development of Kirmaki Suite first block horizon in «Pirallahı» field //SOCAR Proceedings. –2014. –No.2. –P.32-37.

Large differences in water flooding efficiency of patterns in different blocks of the Beibu Gulf oil field in China, were taken as an example of water flow problems leading to reduced recovery factor. Cores of formation W3IV in Well W and formation L3III in Well B were taken for study. By combining dynamic nuclear magnetic resonance, constantrate mercury injection and a visual micro plate model, the flow characteristics and factors influencing the pore scale flow of water were analyzed for these reservoirs. The pore and throat radii were small, but the pore throat ratio is large and its distribution range was wide. So, for example the pore volume of Well B samples was mainly controlled by smaller throats. It is easy for a dominant injection water flow path to form under such conditions and this adversely affects the volumetric sweep efficiency of the water flooding. The mechanism of this is explained. It results in oil recovery in medium and small pores of up to about 40%, while that in large pores is less than 5%. As a consequence the average oil displacement efficiency of Well B was only 44.7%, which is 22.3% lower than that of Well W.

Keywords: nuclear magnetic resonance; water flooding; oil displacement efficiency; sweep efficiency; pore throat structure.

References

1. Y.Zhang, C.Y.Song, D.Y.Yang. A damped iterative EnKF method to estimate relative permeability and capillary pressure for tight formations from displacement experiments //Fuel. –2016. –Vol.167.
   –P.306-315.
2. K.Katika, M.Addassi, M.M.Alam, et al. The effect of divalent ions on the elasticity and pore collapse of chalk evaluated from compressional wave velocity and low-field Nuclear Magnetic Resonance (NMR) //Journal of Petroleum Science and Engineering. –2015. –Vol.136. –P.88-99.
3. L.L.Barbosa, F.V.C.Kock, V.M.D.L.Aleida, et al. Low-field nuclear magnetic resonance for petroleum distillate characterization //Fuel Processing Technology. –2015. –Vol.138. –P.202-209.
4. H.Gao, H.Z.Li. Determination of movable fluid percentage and movable fluid porosity in ultralow permeability sandstone using nuclear magnetic resonance (NMR) technique //Journal of Petroleum
   Science and Engineering. –2015. –Vol.133. –P.258-267.
5. Y.B.Yao, D.M.Liu. Comparison of low-field NMR and mercury intrusion porosimetry in characterizing pore size distributions of coals //Fuel. –2012. –Vol.95. –P.152-158.
6. O.Talabi, M.J.Blunt. Pore-scale network simulation of NMR response in two-phase flow //Journal of Petroleum Science and Engineering. –2010. –Vol.72. –P.1-9.
7. Y.Q.Song. Novel NMR techniques for porous media research //Cement and Concrete Research. –2007. –Vol. 37. –No.3. –P.325-328.
8. S.H.Al-Mahrooqi, C.A.Grattoni, A.K.Moss, et al. An investigation of the effect of wettability on NMR characteristics of sandstone rock and fluid systems //Journal of Petroleum Science and Engineering.
   –2003. –Vol.39. –No3. –P389-398.
9. A.T.Watson, C.T.P.Chang. Characterizing porous media with NMR methods //Progress in Nuclear Magnetic Resonance Spectro. –1997. –Vol.31. –P.344-383.
10. R.L.Kleinberg. Utility of NMR T2 distributions, connection with parameter pz pressure, clay effect, and determination the surface relaxivity parameter ρ2 //Magnetic Resonance Imaging. –1996. –Vol.14. –No.7. –P.761-767.
11. M.P.Enwere, J.S.Archer. Some insight into laboratory core floods using an NMRI technique // Journal of Petroleum Science and Engineering. –1994. –Vol.11. –No.2. –P.73-89.
12. R.R.Sharipov, A.A.Coyedjo, J.M.Quagu, et al. Development of reagents for enhanced oil recovery of high-temperature formations//SOCAR Proceedings. –2017. –No.2. –P.62-67.
13. A.Nepryahin, E.M.Holt, R.S.Fletcher, et al. Structure-transport relationships in disordered solids using integrated rate of gas sorption and mercury porosimetry //Chemical Engineering Science. –2016.
    –Vol.152. –P.663-673.
14. D.Pastorino, C.Canal, M.Ginebra. Multiple characterization study on porosity and pore structure of calcium phosphate cements //Acta Biomaterialia. –2015. –Vol.28. –P.205-214.
15. A.A.Efimov, Y.V.Savitskiy, S.V.Galkin, et al. Study of wettability of reservoirs of oil fields by the method of x-ray tomography core //SOCAR Proceedings. –2016. –No.4. –P.55-63.
16. F.Zhao, R.Shen, S.S.Gao, et al. Application and calculation method of waterflood front in low permeability reservoir //Journal of the Japan Petroleum Institute. –2014. –Vol.57. –No.6. –P.271-275.

Oil and gas production at late stages of Western Siberia oil fields development in process of body height of water content in well production is followed by disproportionate body height of a field gas factor. Only the allocation of oil and gas accumulation in bottomhole formation zone, this phenomenon is not explained. It is shown that progressing growth of the field gas factor with the reduction of oil production and the forcing of fluid production are caused by the entrance in wells oil gas dissolved in the water in reservoir conditions as well as gas overflowed from unrecoverable oil reserves. Temperature rise fluid flow in system of the oil-field collection and preparation of the production brings to content increasing of «fat» components in the composition of the separated gas as a result of the difference of thermophysical oil and water properties. As follows from the results of phase transitions calculations, when the water cutting of well production over 90-95%, the field gas factor may grow several times in comparison with the initial gas content of the oil reservoir. In this paper we develop an approach based on mathematical modeling of dissolved gas in the produced water and a method is proposed to predict changes in gas factor depending on the water cut of well production.

Keywords: gas-oil ratio; water cut of produced fluids; mathematical model; equation of state; gas solubility; water salinity.

References

1. N.A.Gultyaeva, V.I.Shilov, O.V.Fominyh. Rise in current gas factor. Influence of gas dissolved in oilfield water on total amount of gas prodused with gas flowstream //Territoriya «Neftegaz». -2013. -№9. -P.50-57.
2. I.M.Amerhanov, G.A.Rejms, S.T.Grebneva, M.R.Kataeva. Vliyanie zakachivaemoj vody na parametry plastovoj nefti //Oilfield Engineering. -1976. -№6. -P. 16-18.
3. A.I.Brusilovskij. Fazovye prevrascheniya pri razrabotke mestorozhdenij nefti i gaza. M: «Graal», 2002.
4. K.K.Argunova, E.A.Bondarev, I.I.Rozhin. Analytical equations of state of natural gas and their role in mathematical modeling //SOCAR Proceedings. -2016. -№4. -С.41-47
5. N.N.Hamidov, V.М.Fataliyev. Influence of solubility of the different composition gases in the hydrocarbon condensate to the production parameters of gas condensate fields //SOCAR Proceedings. -2015. -№4. -С.36-42
6. M.Behrouz, M.Aghajani. Solubility of methane, ethane and propane in pure water using new binary interaction parameters //Iranian Journal of Oil & Gas Science and Technology. –2015. -Vol. 4. -No. 3. –P. 51-59.
7. G.Soave. Equilibrium constants from a modified Redlich-Kwong equation of state //Chemical Engineering Science. –1972. -Vol. 27. -No. 6. –P. 1197-1203.
8. P.M.Mathias, T.Copeman. Extension of the Peng-Robinson equation of state to complex mixtures: evaluation of the various forms of the local composition concept // Fluid Phase Equilibria. -1983. -Vol. 13. –P. 91-108.
9. Sh.K.Gimatudinov. Fizika neftyanogo i gazovogo plasta. M.: «Nedra», 1971.
10. O.L.Culberson, Jr.J.J.McKetta. Phase equilibria in hydrocarbon-water systems, IV-vaporliquid equilibrium constants in the methane-water and ethane-water systems //Transactions AIME. Petroleum Division. -1951. – Vol. 192. -P. 297-300.
11. A.Chapoy. Phase behavior in water/hydrocarbon mixtures involved in gas production systems. Ph.D. Thesis. Mines ParisTech, 2004.
12. P.Debye, E.Huckel. Theory of electrolytes 1. Freezing point lowering and related phenomena //Physik Z. –1923. –Vol. 24. –P. 185.
13. K.Aasberg-Petersen, E.Stenby, A.Fredenslund. Prediction of high-pressure gas solubilities in aqueous mixtures of electrolytes //Industrial & Engineering Chemistry Research. –1991. –Vol. 30. –P.2180-2185.
14. Z.Duan, S.Mao. A thermodynamic model for calculating methane solubility, density and gas phase composition of methane-bearing aqueous fluids from 273 to 523 K and from 1 to 2000 bar //Geochimica et Cosmochimica Acta. –2006. –Vol. 70. –P. 3369–3386.

This paper considers the depletion of volatile (light) oils reservoirs represented creeping formations. An algorithm for the prediction of the main indicators of development, taking into account the rocks rheology and the actual properties of the hydrocarbon систем is designed. The problem is solved on the basis of the binary model of volatile oils. The process of depletion of a deposit of volatile oil at a specific depression is simulated. By using the offered algorithm numerous computer experiments has been carried out. Has been considered the filtration processes in the creeping formations. The character of the rocks creeping effect on the main indicators of development of volatile oil reservoirs has been defined.

Keywords: modeling; volatile oil; exhaustion; algorithm; forecasting; development; rheology; relaxation.

References

1. M.T.Abasov, F.G.Orudzhaliev, H.I.Eybatova i dr. O filtracii legkih neftej v poristoj srede //Izvestiya AN AzSSR. Seriya nauk o Zemle. -1978. -№4. -S. 9-15.
2. M.T.Abasov, H.I.Dadashzade, M.A.Dzhamalbekov, F.G.Orudzhaliev. Filtraciya letuchih neftej v deformiruemyh kollektorah //Izvestiya AN AzSSR. Seriya nauk o Zemle. -1991. -№ 1-2. -S. 63-69.
3. N.Sanchez, S.A.Maraven. Compositional and pseudo compositional simulations comparison for complex volatile oil reservoir modeling //Paper SPE-23615-MS presented at the SPE Latin America Petroleum Engineering Conference, Caracas, Venezuela, 8-11 March, 1992.
4. A.H.El-Banbi, D.Jr.William. Sampling volatile oil wells //Paper SPE-67232-MS presented at the SPE Production and Operations Symposium, Oklahoma City, Oklahoma, 24-27 March 2001.
5. A.M.Kuliev, R.M.Efendiev, M.A.Gadzhiev i dr. Ocenka vliyaniya relaksacii gornyh porod na potrebnoe kolichestvo skvazhin v neftyanyh zalezhah //Doklady NAN Azerbaijana. –2007. -№ 5. -S.81-89.
6. Yu.M.Molokovich, P.P.Osipov. Osnovy teorii relaksacionnoj fil'tracii, Kazan, Izd. Kazanskogo Gosudarstvennogo Universiteta, 1987.
7. Yu.M.Molokovich. Neravnovesnaya filtraciya i ee primenenie v neftepromyslovoj praktike. Izdatelstvo: CentrLitNefteGaz, 2006.
8. M.A.Jamalbayov. Mathematic modeling of the development of gas condensate reservoir in relaxcompressible formations //SOCAR Procedings. -2012. -№ 4. -P.30-35.
9. N.A.Veliev, M.A.Jamalbekov. Prediction of the indicators of volatile oil deposits development in complicatedly-deformed reservoirs //Automation, telemechanization and communication in oil industry.
   -2017. –No. 4. –P. 39-46.
10. A.T.Gorbunov. Razrabotka anomalnyh neftyanyh mestorozhdenij. M. Nedra. 1981.

The paper offers the corporate methodology to the detailed analysis of well capital productivity ratio of oil-gas production enterprise (board), which consists of two stages of research: preparatory and main. In the first stage the collection and systematizing of initial materials of oil-gas production board (OGPB) is conducted. In the main stage depending on the analysis aim, various well grouping is carried  out. According to this statement, two approaches of research are marked. The fir stapproach has five variants of analysis. The second one consists of three research directions. While working in each case, the capital productivity ratio and the factors influencing it are considered. The capital productivity ratio assessment is conducted in natural and value terms. The methodology has been successfully tested in an OGPB of «Azneft» PU. The practical value of the methodology lies in the fact that it is a significant supplement to the analysis of efficiency of using major production stocks of oil-gas production enterprise.

Keywords: corporate methodologyı; producing and operating well stocks; capital productivity; determinants; average annual cost of main production stocks.

References

1. G.A.Safarov, S.G.Salimova. Methodical approach to detailed analysis of well capacity productivity //SOCAR Proceedings. -2012. -No. 1. -P. 59-61.
2. G.A.Safarov, S.G.Salimova. Summarized results on application of methodical approach to detailed analysis of wells capital productivity //SOCAR Proceedings. - 2013. -No. 2. -C. 76-80.
3. S.G.Salimova. On the problem of detailed analysis of capital productivity by well groups //SOCAR Proceedings. -2015. - No. 4. - P. 61-66.
4. A.I.Perchik. Slovar-spravochnik po ekonomike neftegazodobyvayushey promyshlennost i . M. : Nedra, 1990.
5. Ekonomika predpriyatiy neftyanoy i gazovoy promyshlennosti /pod red. prof. V.F.Dunayeva. M.: «Neft i gaz» RGU nefti i gaza im. I.M.Gubkina, 2006.