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.B.Huseynov1, A.M.Salmanov2, B.I.Maharramov2
By analyse results of complex of geological-geophysical and geochemical studying of kura and gabirri interfluves it was revealed that, oil-gas source rock of maykop deposits was subsided in different: continental, deltaic, shallow and deep marine conditions. Organic matter substance in crossection of this deposits changes between from 0.02 to 2.14%. Geothermic gradient of upper part of maykop deposits, shows on low maturity level of organic matter on the studied region. Despite of it, conducted studies shows that, in low part of maykop deposits and Eocene deposits there are subsiding probability of shale HC. By the study results it is possible to come to conclusion that, deposits of the 3000-5000 m depth interval, passed the main oil-gaz formation window. At the same time low permeability and fracturing of Eocene and maykop deposits positively influenced on subsiding and preservation processes of shale HC.
Keywords: geology; tectonics; paleotectonics; lithology; litophase; stratigraphy; structure; paleostructure; raising; basin; sedimentation; deposit; hydrocarbon; trap; organic matter; oil-gaz mining; clay; shale; perpective; paleogen-miosen; maykop.
A.R.Kurchikov, A.K.Yagafarov, I.P.Popov, V.M.Aleksandrov, A.A.Ponomarev, M.D.Zavatsky, M.A.Kadyrov
The work presents a substantiation of the need for the introduction of computer microtomography (µ-CT) into a set of standard core studies to refine the facies conditions of reservoir rocks formation. The object of the study was the rocks of the Ju2 layer (Tyumen formation) from well № 47 of the Urnenskoye oil field (West Siberian oil and gas basin). Core samples with a diameter of 8 mm were analyzed using the X-ray microtomography method. The study consisted of a structural analysis of tomographic sections and the correlation of geological-geophysical, textural-structural and lithologic-facies data. The relationship between the data of microtomography and the results of geological and geophysical studies has been revealed. Analysis of these materials allows to isolate in the delta channel the sediments of three subtypes of sediments, identified with sedimentary sub-microfacies. The pore space structure of Ju2 layer reservoir rocks was studied. It was concluded that it is necessary to use the results of computer microtomography during the facial analysis of terrigenous sediments of the West Siberian sedimentary megabasin and the construction of three-dimensional geological models.
Keywords: computer microtomography; core; sedimentation; facies analysis; spectrometric modification of gamma-ray logging on a core; sedimentary facies; sub-microfacies; petrophysical studies; reservoir rocks.
B.A.Perminov, V.B.Perminov, Z.H.Yagubov, I.A.Dementiev
In the work the analysis of the frequency characteristics of the measuring channels of a dual-input control system, and general frequency characteristics on example a dual input control system of dynamic increment of torque. The article shows that in mode of quasiresonance, the imaginary component of the frequency function becomes zero. This leads to the exclusion of the amplitude-frequency and phase-frequency distortions in the measurement channel. The calculation of the logarithmic amplitude-frequency characteristics of the entire system in mode of quasiresonance showed a complete absence of frequency distortion in a dual-input control system of dynamic increment of torque. Considered experimental logarithmic amplitude-frequency and phase-frequency characteristics in the absence of quasiresonance and if it in one of the measurement channels. It is shown that at frequencies less than resonance, the phase shift and amplitude of frequency distortion have positive values, while at frequencies above resonance – negative. The article presents the results of tests of a prototype of a dual input control system parameters torque on experimental wells in the company «Eltech», Usinsk, Komi Republic.
Keywords: dual-input control system; quasiresonance; measuring channel; variational structure; frequency characteristics; frequency distortion.
The article describes problems while construction of directional wells with horizontal ending on the Jurskiye deposits of the Koshilskoye field. It demonstrates effectiveness of modified biopolymer emulsion drilling mud. The proposed drilling mud has high rheological, lubricating and inhibiting properties, unique filtration and crust-forming characteristics, contributes to the preservation of the natural reservoir properties. Using the mud while drilling for liner allowes to minimize the risk of fluid loss and stuck pipe and provides for trouble-free drilling.
Keywords: biopolymer emulsion drilling mud; complications; jurskiye deposits; Bazhenov suite; directional well with horizontal ending; liner.
The paper presents a scientific substantiation of improving enhanced gas recovery technology and current gas production from fields with low-permeable terrigenous reservoirs. In the results of physical and hydrodynamic modeling the regularities of adsorption-desorption processes in tight gas reservoirs were established and the impact of different well placing with interval hydraulic fracturing on the production flow rate and gas recovery factor was estimated. On the basis of this research the existing technologies of enhanced gas recovery from tight reservoirs could be improved, their technological and economic impacts on field performance were established and recommendations for implementation were given.
Keywords: tight reservoirs; desorption; gas recovery factor; hydraulic fracturing.
D.A.Iskenderov1, G.G.Ibadov2, Y.K.Tolepbergenov3
New designs of downhole filters are developed and applied to prevent or limit mechanical impurities entry into the underground equipment. The new design gravel pack, proposed in the article, can be applied in wells, regardless of the operation mode or extracted products, comprising mechanical impurities. This paper gives the solution how to provide the maximum filter strength, increase effective life, distribute a comprehensive, uniform product inflow into the well and, if necessary, ensure full recovery of the equipment from the well. The installation of a downhole filter eliminates the risk of cement sheath damage in the casing annulus and limits sand entry, resulting in an increase in wells’ turnaround time, reduction in current and capital works, and an increase in well flow rate.
Keywords: borehole filter; mechanical impurities; formation fluid
F.G.Hasanov, Sh.P.Kazimov, E.S.Abdullayeva
The paper suggests a method for sand and mechanical impurities settling in a liquid flow, including a sand settler, which is installed prior to a production gathering and handling point directly on the infield pipeline, both on one well line and at branch connections. However, the developed sand settler is located at a distance determined by the proposed relationship. The design parameters of the sand settling device, which provide the most complete trapping of mechanical impurities as well, are determined based on the daily volume of liquid passing through the device by comparing parameters such as settling time of solids and the passage time of liquid with solid particles through the device. Since June 20, 2016, the tests of the developed device for sand settling were started on deep-water offshore platform No. 4 of Guneshli field, «28 May» OGPD. In order to protect liquid -injection pumps against sand impact, the sand settler was installed on the on suction pipe of onshore field line of the 4th platform.
Keywords: mechanical impurities; infield pipeline; field equipment; production gathering and handling facilities; sand settler; particles settling rate; particle size; fluid discharge.
The paper deals with laboratory-experimental studies of the effect of temperature of a working agent on the displacement coefficient of high-viscosity oil in conditions of the Karazhanbas oil field. According to the results of studies conducted by the laboratory center of JSC «KazNIPIMunaigas», it follows that an increase in the temperature of the working agent contributes to an increase in the displacement of oil, an increase in the oil displacement coefficient is noted for all lithotypes of the rocks. The dynamics of the displacement coefficient increases sharply as the temperature of the injected water rises from 50 °C and more. This is achieved due to a sharp decrease in the viscosity of oil (3 times) and increase its mobility, which is confirmed by the results of PVT studies of deep oil samples performed on 4 wells. Evaluation of the effect of mineralization on clay rocks showed that a decrease in mineralization negatively affects reservoir properties. A significant decrease in permeability with a decrease in the mineralization of injected water before complete desalination is associated with clay types: clays are represented by illites and smectites, which are highly prone to swelling. In the work on the basis of laboratory-experimental research, it is recommended to use hot water with a temperature in the range of 50-90 °C for an effective displacement of oil and to carry out an experimental industrial test.
Keywords: high viscosity oil; displacement coefficient; lithotypes of rocks; pvt study; mineralization; clay rocks; reservoir properties; permeability; laboratory-experimental research; oil displacement.
R.N.Bakhtizin1, K.R.Urazakov1, S.F.Ismagilov1, A.S.Topolnikov2, F.F.Davletshin3
The paper presents a mathematical model for calculation of dynamic loads, which force a rod column and plunger of sucker rod pump in inclined well during pumping the multiphase fluid consisting of water, oil and gas. The mathematical model accounts for forces of boundary friction of rods and tube surface and viscous friction of rods and moving gas-liquid flow in the tubes, parameters of multiphase flow inside the tubes and annulus and also a variable type of pressure under the plunger space, phase transition and hydraulic losses. Results of simulation are compared with field measurements.
Keywords: sucker rod pump; dynamogram; inclined well; boundary friction; dynamic load.
R.T.Akhmetov, V.V.Mukhametshin, A.V.Andreev, Sh.H.Sultanov
The paper demonstrates that the hydrophilic behavior of productive formations is primarily determined by water retaining capacity. Especially it concerns carbonaceous reservoirs characterized by lack or lon gel cement. In terrigenous reservoirs the water retaining capacity is greatly affected by variability of gel cement mineral composition. In (unchanged) permanent mineral composition of interstitial clay there may present correlational relationship between hydrophilic behavior and water retaining capacity of a productive reservoir.
Keywords: hydrophilic behavior; water retaining capacity; productive reservoir; reservoir properties.