U. J. Aliyeva

«OilGasScientificResearchProject» Institute, SOCAR, Baku, Azerbaijan

Some features of prospecting work in the oil and gas region of Ganja

Extensive exploratory investigations and borehole surveys have confirmed the high prospect of oil and gas potential of the Upper Cretaceous-Maikop deposits in numerous structures in the Ganja oil and gas region. The structures identified in the OGR have a complex structure and are also complicated by multidirectional fractures. Although the regularity of field formation has been clarified, an individual approach to prospecting and exploration operations at each block is necessary. It is necessary to direct prospecting and exploration operations to obtain direct geophysical parameters representing oil and gas potential in other blocks, taking into account the results of recent comprehensive geophysical surveys at the Gazanbulag-Chaily and Naftalan-Godakboz fields. Taking into account the available geophysical data and using appropriate geophysical complexes for predicting of oil and gas potential in anticlinal and non-anticlinal structures, determination of their boundaries and depths, elements of traps and stratigraphic affiliation is an effective way for further exploration of oil and gas.

Keywords: seismic survey; refracted wave; gravity-magnetic survey; seismic and gravimetric anomaly; trap; oil and gas field; upper Cretaceous-Maikop.

DOI: 10.5510/OGP20210300523

E-mail: ulvmammadova@gmail.com

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V. Sh. Gurbanov¹, S. V. Galkin², N. R. Narimanov³, L. A. Sultanov³, G. G. Abbasova³

¹Institute of Oil and Gas of the ANAS, Baku, Azerbaijan; ²Perm National Research Polytechnic University, Perm, Russia; ³Azerbaijan State Oil and Industry University, Baku, Azerbaijan

Petrophysical characteristics of the Meso-Cenozoic sediments of the Southeastern subsidence of the Greater Caucasus in connection with their oil and gas potential

In order to assess the prospects for oil and gas potential, the reservoir properties of Mezozoy-Kaynazoic sediments, formed in various geological conditions of the structures of Yalama, Khudat and Siazan monocline, have been studied. The results of the analysis are summarized in tables reflecting the physical and reservoir properties of various types of rocks. On the basis of petrophysical analysis for reservoirs of various lithological types, regularities have been established in changes in density, carbonate content, porosity and permeability of rocks, as well as in the propagation velocity of ultrasonic waves. It was found that changes in reservoir properties of rocks over the area are mainly associated with lithogenesis conditions, with heterogeneity of the lithological composition of sedimentary complexes, with the depth of occurrence of rocks, as well as with the peculiarity of the development of local uplifts. When predicting oil and gas content in deep-seated strata of the territory under consideration, along with exploration and geophysical methods, it is also recommended to use the results of changes in the filtration-volume characteristics of rocks, as well as the nature of the change in the propagation velocity of seismic waves with depth.

Keywords: lithological facies; density; porosity; permeability; carbonate content; seismic P-wave velocity.

DOI: 10.5510/OGP20210300524

E-mail: vagifqurbanov@mail.ru

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R. M. Huseynov

«OilGasScientificResearchProject» Institute, SOCAR, Baku, Azerbaijan

Conditions for the formation and accumulation of hydrocarbons in oligocene-miocene sediments of Western Absheron

Oligocene-Miocene deposits, after the main oil-gas suit of Azerbaijan – the Productive Suit, are one of the most studied objects. This complex is classified as mature rocks and, according to the stratigraphic scale, is associated with Maykop, Chokrak, and diatom deposits. Therefore, studies of the conversion of organic substances to hydrocarbons under favourable sedimentation and thermobaric conditions are of great importance. In addition, the determination of hydrocarbon generation zones, the presence of appropriate paleotectonic and paleostructural conditions for their further migration and accumulation in traps are also important tasks requiring clarification. For this purpose, maps of the Maykop and Mid- and Upper Miocene sediments were constructed, models reflecting their paleostructural position by the end of the century of the productive stratum, and
predicted paleotemperatures are indicated on the diagrams. As a result, it was found that the reducing-alkaline environment existing during sedimentation in the Maykop and Chokrak period was favourable for the conversion of organic substances into hydrocarbon.

Keywords: Western Absheron; oligocene-miocene sediments; source rock; organic matter; oil window; vitrinite; geochemical condition; source of generation; migration; traps; paleostructure.

DOI: 10.5510/OGP20210300525

E-mail: rovshan.huseynov@socar.az

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S. Z. Ismayilov¹, V. J. Abdullayev², E. Sh. Garagozov³, I. A. Qasımov¹, Z. Z. Ismayilov¹

¹«SOCAR – AQS» JV, Baku, Azerbaijan; ²«OilGasScientificResearchProject» Institute, SOCAR, Baku, Azerbaijan; ³«Azneft» PO, SOCAR, Baku, Azerbaijan

Application of drilling of multilateral well on the basis of new technology and model in south Caspian basin

The article discusses the issue of drilling multilateral horizontal wells and provides a brief history of its development. Data were provided on the selection of the location of the multilateral horizontal well, drilling the main wellbore and determining the depth for running the сasing strings. This paper also analyzes the selection of lateral wellbore penetration depth, the importance of drilling multilateral horizontal wells and their application for the first time in the shelf water of South Caspian Basin, at the Western Absheron field, Well 19.

Keywords: multilateral wells; drilling of horizontal wells; petrophysical models; drilling of main and lateral wellbores.

DOI: 10.5510/OGP20210300526

E-mail: vugar.abdullayev@socar.az

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B. A. Suleimanov¹, S. J. Rzayeva¹, U. T. Akhmedova²

¹«OilGasScientificResearchProject» Institute, SOCAR, Baku, Azerbaijan; ²SOCAR Downstream Management LLC, Baku, Azerbaijan

Self-gasified biosystems for enhanced oil recovery

Microbial enhanced oil recovery is considered to be one of the most promising methods of stimulating formation, contributing to a higher level of oil production from long-term fields. The injection of bioreagents into a reservoir results in the creation of oil-displacing agents along with significant amount of gases, mainly carbon dioxide. In early, the authors failed to study the preparation of self-gasified biosystems and the implementation of the subcritical region (SR) under reservoir conditions. Gasified systems in the subcritical phase have better oil-displacing properties than non-gasified systems. Because, in a heterogeneous porous medium, the filtration profile of gasified liquids in the SR should be more uniform than for a degassed liquid. Based on experimental studies, the superior efficiency of oil displacement by gasified biosystems compared with degassed
ones has been demonstrated. The possibility of efficient use of gasified hybrid biopolymer systems has been shown.

Keywords: self-gasified; biosystem; microbial; subcritical region; slippage effect; enhanced oil recovery.

DOI: 10.5510/OGP20210300527

E-mail: baghir.suleymanov@socar.az

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A. A. Abbasov¹, E. M. Abbasov², Sh. Z. Ismayilov³, A. A. Suleymanov³

¹SOCAR, Baku, Azerbaijan; ²Institute of Mathematics and Mechanics, Baku, Azerbaijan; ³Azerbaijan State Oil and Industry University, Baku, Azerbaijan

Waterflooding efficiency estimation using capacitance-resistance model with non-linear productivity index

A modified Capacitive Resistive Model (CRM), with a non-linear Productivity Index (PI), has been suggested to evaluate efficiency of waterflooding in heterogeneous reservoirs. CRM model is based on continuity equation between production and injection, and has several additional advantages. The technique does not require sophisticated geological and hydrodynamics numerical simulation modeling, which would require expensive computing time and based on actual hydrodynamic data. The model adequately describes depletion process and can be used for production forecasting and waterflooding mechanism. Capacitance-resistance model with non-linear productivity index has been tested against numerical model as well as actual production data. Additionally, non-linear productivity index based CRM model was compared against the CRM model with linear productivity index function. The calculations algorithm does not require building static geological models and running dynamic simulations, nor it demands extensive computational resources and time, thanks to using production and injection history only, therefore it can be deployed easily.

Keywords: waterflooding; capacitance-resistance model; non-linear productivity index; efficiency; monitoring; forecast.

DOI: 10.5510/OGP20210300528

E-mail: petrotech@asoiu.az

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I. N. Ponomareva, D. A. Martyushev

Perm National Research Polytechnic University, Perm, Russian Federation

Evaluation the Volume of Distribution of the Injected Water and the Interaction Between Injection and Production Wells Probabilistic and Statistical Methods

The article describes the application of probabilistic-statistical methods for solving the urgent problem associated with determining the direction of movement of filtration flows. Today, the oil industry enterprises for these purposes use methods of hydrolistening and indicator research. These methods can most accurately assess the direction of movement of the filtration flows, but due to the high cost and duration of these studies in the Perm Krai fields are not often carried out. In this paper, we propose to study the interaction between production and injection wells by correlating the accumulated characteristics of their work. An analysis of the dynamics of the correlation coefficient between the accumulated values of water injection and liquid production performed in this way made it possible to establish qualitative indicators of the waterflooding system within the considered element of the development system. The obtained qualitative indicators of the waterflooding system demonstrate a high reliability of practical application, which is confirmed by the materials of tracer studies, as applied to the carbonate deposits of the Gagarinskoye field.

Keywords: tracer studies; oil production; water injection; filtration flows; correlation coefficient; angular coefficient; carbonate reservoir.

DOI: 10.5510/OGP20210300529

E-mail: martyushevd@inbox.ru

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S. D. Maherramova

Institute of Oil and Gas of ANAS, Baku, Azerbaijan

Improvement of efficiency of the process of extraction of condensate on gas-condensate deposits with various development modes

On the basis of mathematical modeling, the possibilities of increasing the condensate recovery coefficient at gas-condensate deposits under different development regimes are investigated. It has been established that the final condensate recovery coefficient significantly increases compared to the depletion development regime by maintaining reservoir pressure using nitrogen, also carbon dioxide, and their results are comparable to the corresponding dry gas injection results.

Keywords: permeability; porosity; pressure; condensate recovery factor; nitrogen injection.

DOI: 10.5510/OGP20210300530

E-mail: xasay.feyzullayev@socar.az

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E. T. Baspaev

«OPTIMUM» Design Institute LLP, Aktau, Kazakhstan

Efficiency improvement for removal of liquid from gas wells bottom zone

One of the effective technologies for removing liquid accumulated at the bottom of gas wells and restoring the free movement of gas is the introduction of solid surfaceactive substances (surfactants) in a spherical or cylindrical form (chemical candle) to the bottomhole, contributing to the aeration of the foam mud at the bottom of the well and its rise to daylight surface. Foam formation reduces hydrostatic pressure on the formation, enhancing well productivity. The paper addresses the results of studies on a new composition of a solid surfactant for removing liquid from the bottom of gas wells. Proceeding from the studies carried out, it can be concluded that the considered composition has a high surface activity, wetting and multifunctional protective ability. A method is proposed for delivering a solid surfactant (chemical candles) to the bottom of a directional well.

Keywords: gas wells; liquid removal; solid surfactant; chemical candles; aeration of the foam mud; directional well.

DOI: 10.5510/OGP20210300531

E-mail: baspaev1989@gmail.com

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E. F. Veliyev

«OilGasScientificResearchProject» Institute, SOCAR, Baku, Azerbaijan

Application of amphiphilic block-polymer system for emulsion flooding

The paper presents the developed composition of an amphiphilic block polymer that forms a stable emulsion system. The presented block polymer composition also possesses reversible-thermal gel-forming properties, which allows to consider it as an effective working agent on deep fluid diversion purposes. Amphiphilic polymer systems traditionally used in the oil industry are not very stable in high-salinity environments. For this purpose, a block polymer formulation was developed which eliminates this disadvantage. This work presents the results of the research on the effect of the block polymer on the surface tension values in saline environments. The main results of the presented work are as follows: emulsion stability increases with concentration increase of block polymer used as emulsifier; determination of the critical concentration of aggregation above which a transition from macro to micro emulsions occurs; and increase of oil recovery by 37 % with injection of 0.25 pore volume emulsion slug.

Keywords: oil recovery factor; emulsion flooding; block-polymer; critical aggregation concentration.

DOI: 10.5510/OGP20210300532

E-mail: elchinf.veliyev@socar.az

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K. I. Matiyev¹, A. M. Samedov¹, F. M. Akhmedov²

¹«OilGasScientificResearchProject» Institute, SOCAR, Baku, Azerbaijan; ²SOCAR Midstream Operations Limited, Baku, Azerbaijan

Reduction of acidity and corrosive activity of an oilstock

A new composition has been developed to reduce the acid number and corrosive activity of oilstock, which includes hydroxides of group 1A elements, substances with demulsifying properties, as well as surfactants that create additional auxiliary properties. The activity of the developed compositions to reduce acidity and corrosion activity was studied on various types of oils taken from the Dubendi site.

Keywords: naphthenic acids; acid number; corrosive activity; surfactant; oilstock.

DOI: 10.5510/OGP20210300533

E-mail: kazim.metiyev@socar.az

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V. A. Suleymanov¹, N. A. Buznikov²

¹Gubkin Russian State University of Oil and Gas (National Research University), Moscow, Russia; ²«Gazprom VNIIGAZ» LLC, Razvilka, Moscow Region, Russia

Effects of the transported fluid composition and the pipeline route profile

 

The modes of the transport of gas with low condensate content in an extentional subsea pipeline with a hilly terrain profile of the route are studied. Flow assurance in a pipeline is provided if the gas flow rate exceeds a certain threshold value called the turndown rate. It is shown that for a pipeline with a complex route profile, the transport of a two-phase hydrocarbon fluid (gas and condensate) is preferable to provide the flow assurance, since the presence of even a small amount of the water and hydrate inhibitor in the fluid leads to significant increase of the turndown rate. It is found that to expand the range of the safe pipeline operation, the use of methanol as a hydrate inhibitor is preferable over glycols. The performed hydraulic calculations show that the alignment of the pipeline route under construction may result in a decrease in the turndown rate for the transport of two-phase fluid and multiphase fluid containing a water solution of methanol.

Keywords: subsea pipeline; natural gas; gas condensate; hydrate inhibitor; multiphase fluid; liquid holdup; turndown rate.

DOI: 10.5510/OGP20210300534

E-mail: suleymanov.v@gubkin.ru

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A. A. Gasimov¹, G. B. Hajiyev²

¹SOCAR, Baku, Azerbaijan; ²Azerbaijan State University of Economics, Baku, Azerbaijan

On management evaluation of oil-gas industry enteprises in modern economic condition

The article shows the history of the oil industry in our country and its current situation. Since the establishment of the State Oil Company of the Republic of Azerbaijan (SOCAR) to date, a number of successes have been achieved, especially since the launch of a new oil strategy in our country. Thus, during the years of independence new oil and gas fields were discovered, modern technologies were mastered, new agreements were signed with international oil companies, qualified human resources were developed and other achievements were made. International financial reporting and risk management in oil and gas industry enterprises were assessed. The application of the advanced work and projects mentioned in the article has shown that SOCAR has also strengthened its position in the international financial market and benefited from new banking products. As a result, oil and gas industry enterprises with international financial reporting have a favorable investment climate, which allows for efficient management of competitive production.

Keywords: oil-gas industry; enterprise; development; management; finance; report; riscs.

DOI: 10.5510/OGP20210300535

E-mail: anver.qasimov@socar.az

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