The Journal’s official publisher is "OilGasScientificResearchProject" Institute of State Oil Company of Azerbaijan Republic (SOCAR).
SOCAR Proceedings is published from 1930 and is intended for oil and gas industry specialists, post-graduate (students) and scientific workers.
Journal is indexed in SCOPUS, Russian Scientific Citation Index and abstracted in EI’s Compendex, Petroleum Abstracts (Tulsa), Inspec, Chemical Abstracts database.
B.H.Nugmanov1, А.Sh.Eminov2, F.V.Ragimov3
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
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.
B.A.Suleimanov1, Ya.A.Latifov2, Kh.M.Ibrahimov1, N.I.Guseinova1
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 KSu.
Keywords: thermoactive polymer composition; increase in stimulation coverage; stratified heterogeneous reservoir; intrastratal overflows; enhanced oil recovery; well interference.
R.Shen1,2, X.Lei3, H.K.Guo1,2, H.T.Zhou1,2, Q.Zhang4, H.B.Li1,2
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.
V.G.Mikhaylov1 , A.I.Ponomarev2 , A.S.Topolnikov1
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.
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.
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.