SOCAR Proceedings

SOCAR Proceedings

Published by "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 Web of Science (Emerging Sources Citation Index), SCOPUS and Russian Scientific Citation Index, and abstracted in EI’s Compendex, Petroleum Abstracts (Tulsa), Inspec, Chemical Abstracts database.

M.M.Isgandarov, A.H.Abuzarova (“OilGasScientficResearchProject” Institute)

Substantiation of criteria for oil & gas content in heterogeneous sandy-siltstone reservoirs (On an example of deposits of the Baku archipelago)

This work is devoted to the substantiation of the criteria for identifying petroleum heterogeneous sand and silt in the reservoir sections productive series deposits in the Baku archipelago South-Caspian Basin. It is known that the productive reservoirs can be divided into water-saturated and hydrocarbon saturated zones on the basis of critical electrical resistivity, the justification of which is performed by comparing the results with their formation testing resistivity, defined according to the interpretation of the well logging data. Another way of selecting the minimum resistivity value which can be associated with hydrocarbon fluid production (oil or gas) is associated with ρn the definition of an accurate reservoir petrophysical model. For this purpose, calculations were carried out of the critical resistivity value and comparing it with the results of the statistical method and the results of testing. We considered the following petrophysical models of rock: sandstone with the dispersed clay; interbedded layers of pure sandstone and shale; interbedded sandstone and shale with dispersed clays; Fertl model and the Pouopon model. According to the results of model studies for the investigated reservoirs the model of interbedded sandstone and shale with dispersed clays is characteristic. Based on the adopted petrophysical reservoir model, we calculated the minimum resistivity of the formation, which is in good agreement when compared with the results of testing and the results of the statistical method.

DOI: 10.5510/OGP20130400171


B.S.Aslanov (“OilGasScientficResearchProject” Institute)

Seismic geodynamical conversion and South Caspian and Zagros overthrust using geological evolution based 3D modeling gravity maps

Zagros Thrust System (ZTS) and the Absheron-Balkhan zone (ABZ) up-lifts are imposed on the cutting-edge deflections: respectively Mesopotamian and Pirallahi-Kelkorsky. ZTS and ABZ, are amongst the richest oil and gas regions. Is this a coincidence or accident related to the geological evolution of the region as a whole? What is the nature of these fields? Where there was oil, when, where and how has it moved to the current layer? The article is an attempt to find answers to these questions on the basis of a comprehensive analysis of existing geological and geophysical data and making 3D models of gravimetric maps in the Bouguer reduction.

DOI: 10.5510/OGP20130400172

E-mail: DOI: 10.5510/OGP20130400172

I.I.Guliyev ("OilGasScientificResearchProject" Institute)

Current views on the origin of the oil and gas

In interpretating the geological and geophysical data for prospecting and exploration of oil and gas fields, there is a need to investigate the formation process, the formation of the compositions, the mode of occurrence in the geological structure and parameters of the velocity, density and specific resistance of the fluid. In this article, the author briefly reviews the current views on the theory of the origin of oil and gas at high temperatures and pressures in the natural mode of occurrence.

DOI: 10.5510/OGP20130400173


А.B.Karаmurzayeva ("KazNIPIMunayGas" SC)

Features of a geological structure of Middle Jurassic deposits of the western bloc of "Karazhanbas" field

In the article, the special features of the geological structure and occurrence of oil-and-gas in the middle Jurassic productive deposits of "Karazhanbas" oilfield are considered. Special attention is given to the Western block of the field. Analysis of all available geological, geophysical and geological-field materials, as well as the results of interpretation of seismic 2D and 3D, permitted a facies model of the Ю-Iср formation to be built. It has been concluded that the Western part of the Western bloc is a little drilled area with well-defined reservoir properties, which represents the greatest interest and requires thorough consideration and exploration.

DOI: 10.5510/OGP20130400174


V.G.Gadirov, A.S.Hasanov ("OilGasScientificResearchProject" Institute)

Gravimetric result on Kur-Talish and Hajigabul oil gas prospectivities areas

In the article results of investigation performed on high-precision gravity exploration in Kur-Talish and Hajigabul areas of Low Kur depression are described. The geological nature of the observed local minimum gravity in the Bouguer anomaly area has been analysed and it is shown to be in accordance with the Kur-Talish structure on PL. It is construed that an arrangement scheme of characteristic gravitational minima are related to the formations being oil-gas bearing. Recomendations are made regarding use of geophysical data for exploration within a gravitational anomaly.

DOI: 10.5510/OGP20130400175


H.Zhang, G.Li, Z.Huang, S.Tian (China University of Petroleum)

Mathematical model of critical velocity for cuttings transport in microhole drilling

Microhole drilling is a new technology that provides many advantages, but at the same time there are also disadvantages such as high friction, poor hole-cleaning, etc. One of the biggest obstacles of microhole coiled tubing drilling is that there is no rotation of the drill string during drilling, which significantly reduces the hole cleaning process. Thus, the microhole drilling efficiency will be affected and, more seriously, cuttings accumulation may cause sticking which will lead to a microhole drilling accident. Therefore, a mechanistic model of critical velocity for cuttings transport in microhole drilling is required. This paper analyzed the suspension transport mechanism and the rolling transport mechanism, which are the main transport mechanisms for cuttings transport during microhole drilling. Then, a mathematical model of critical fluid velocity for cuttings transport was proposed. Model predictions indicate that the critical fluid velocity reaches a minimum value at low inclination angles. The position of the minimum value is determined by drag coefficient, lift coefficient and inclination angle. The critical fluid velocity for cuttings transport reaches the peak value within the scope of 50-70° of inclination angle during microhole drilling, and cuttings are more easily deposited to form a cuttings bed. The increase of drilling fluid viscosity tends to induce the critical fluid velocity for cuttings transport in micro wellbore and enhance micro wellbore cleaning. However, as the pressure loss in micro wellbore is large, the pressure in the well should also be considered in order to select a reasonable viscosity.

Keywords: microhole drilling, cuttings transport, critical velocity, mechanism model, solid liquid flow

DOI: 10.5510/OGP20130400176


L.Hu, J.Deng, F.Deng, H.Lin, C.Yan, Y.Li, H.Liu, W.Cao (China University of Petroleum)

Calculation of collapse pressure in shale gas formation and the influence of formation anisotropy

Shale gas formations feature anisotropy both in mechanical properties and in strength, so it is necessary to take into consideration the influence of the anisotropy on the calculation of collapse pressure when drilling through shale gas formations. The shale gas formation is assumed to be a transversely isotropic material, and the modified Mohr-Coulomb criterion is adopted to describe the failure of the shale gas formation with consideration of the impact of the weak bedding plane. Then, the influence of the elasticity modulus anisotropy and the Poisson’s ratio anisotropy on collapse pressure is discussed. The calculation result reveals that the influence degree varies with the deviation angle and the azimuth angle of the wellbore. If the ratio of the horizontal elasticity modulus and the vertical elasticity modulus and that of the vertical Poisson’s ratio and the horizontal Poisson’s ratio are smaller than 2, the influence of the anisotropy is negligible since the degree of influence is smaller than 7 percent compared with the isotropic model. The research result can guide the calculation of collapse pressure when drilling through shale gas formations.

Keywords: shale gas formation, transversely isotropic, collapse pressure, elasticity modulus, Poisson’s ratio

DOI: 10.5510/OGP20130400177


F.S.Ismayilov, A.M.Gasimli, F.Y.Abdullayeva, S.J.Rsayeva ("OilGasScientificResearchProject" Institute)

Recovery of residual oil from watered layer using a new microbiological method

In this article, the results of searching for a new local industrial waste-yeast remnants of the Baku champagne factory as a bioreagent used in a microbiological stimulation of oil strata are presented. A series of laboratory researches were conducted in order to determine an application possibility of a current bioreagent in combination with other known reagents for increasing reservoir recovery. We determined that an application of a new remnant as a slug in composition with an activated sludge for injection to a watered layer leads to a greater increase in oil recovery than in the case of molasses solution injection.od

DOI: 10.5510/OGP20130400178


O.A.Dyshin, S.M.Abasova ("OilGasScientificResearchProject" Institute, ASOA)

Reliability assessment of electric submersible pumps using censored samples

On basis of selected samples about failures using root estimation method of probability density function we have obtained distribution-free density function estimators, distribution functions and failure rate of electric submersible pumps, utilized when oil wells’ operation.

DOI: 10.5510/OGP20130400179


E.A.Kazimov, M.A.Bisenova ("OilGasScientificResearchProject" Institute, "KazNIPIMunayGas" JSC)

About the impact of additives a bactericide-inhibitor "Composite-1" on the rheological properties of "Zhetybai" oil field

The problem of increasing efficiency of operation of oilfield systems at "Zhetybai" oil field is an important direction of research. Currently, this problem acquires particular importance in connection with the entry of the field into a late stage of development, characterized by high water cut. It should also be noted that a significant fraction of the produced products are heavy oil with abnormal rheological properties. To prevent the development of sulfate reduction and reduction of corrosion rate of oil-field equipment we have designed a new reagent Composite-1, which possesses both antibacterial and anticorrosive properties. The investigation of the new bactericide inhibitor and its analogues effect on "Zhetybai" oil rheological properties at temperatures of 40 оС and 50 оС was of concern. This provided the motivation to study the new bactericide inhibitor and its analogues on the rheological properties of oilfield "Zhetybai", at temperatures of 40 оС and 50 оС. On the basis of the observed rheological curves of initial oil without adding reagents it was identified that the oil from "Zhetybai" field manifests non-Newtonian flow behaviour. Regulation of these properties is achieved through the colloid-chemical properties of reagent Composite-1.

DOI: 10.5510/OGP20130400180


M.P.Safiullin, A.A.Safina (Kazan (Volga region) Federal University)

Structural analysis of the formation of value chain by basic technological conversions in oil and gas chemical sector (Example of the Republic of Tatarstan)

Тhe article presents a macroeconomic analysis of basic technological conversion indices (by economic activity categories), conducted for oil and gas chemical sector of the Republic of Tatarstan. The author offers his own cost analysis technique for the production chain for plastic products, from raw material extraction to end product manufacturing. The production chain cost analysis technique permits to establish a share of costs in revenue from petrochemical products manufacturing by basic technological conversions. A value chain structure of oil and gas chemical sector of the Republic of Tatarstan is made for the period from 2005 to 2012.

DOI: 10.5510/OGP20130400181