Articles

Automation

Problem of defining leakage at multi line gas-main pipeline by standard linear telemetering gear

Sergey V. Yevseyev

The present work objective is to define the main reasons causing complexity of defining leakage location at a multi-line gas-pipeline by a shift dispatching personnel on the basis of the information received from the linear telemechanics system. Analysis of dispatcher actions in case of real breakdown elimination when the gas-pipeline is broken completely was carried out. As a result of the analysis there are indicated available telemechanics systems basic shortcomings and the ways to solve the said problems. An important aspect presented in the work is the necessity of using system approach to the information recorded by the linear telemechanics system and creating additional methods and algorithms for automated processing this information in order to define the time and location of the emerged leakage without specialized sensors.


DOI: 10.24411/2076-6785-2019-10065

Geology

Facies conditions of neocomian deposits of the northern part of the Priobskoye oil field

Galiev R.R., Abdrahimov R.I., Voloshina A.A., Novikov A.P.

DOI: 10.24412/2076-6785-2022-7-40-43

Abstract
The paper presents the results of constructing a facies model of the Neocomian deposits of the northern part of the Priobskoye oil field based on seismic facies analysis and interpretation of core and geophysical well information.
To obtain qualitative analysis results, an interpretation tool based on the technology of neural networks was used. A statistical approach is applied to determine the optimal number of seismic classes. The new lithological-facies model more accurately reflects the state of oil reserves, formed the basis of the geological representation of the structure of the field protected in 2020, was used in making design decisions, allowing to increase the dynamics of production.

Materials and methods
The site under consideration has been studied by 194 wells with core sampling and seismic surveys in the amount of more than 2 800 km². The software of the three-dimensional seismostratigraphic interpretation of Stratimagic by Paradigm company was used to carry out
seismic facies analysis for the target interval of Cretaceous sediments. The materials of works [1] and [2] describing the regional development of Mesozoic-Cenozoic deposits on the territory of the Priobskaya oil and gas bearing zone were involved.

Keywords
facies sedimentation conditions, clinoform deposits, seismofacial analysis, core, GIS, attribute analysis

Prospects of the North-West Kamchatka shelf supported by new data integration

Vanin V.A.

DOI: 10.24412/2076-6785-2022-7-20-24

Abstract
The Shelikhovsky basin in the northeast of the sea of Okhotsk remains poorly covered by rare 2D seismic profiles, the basin has not been studied by the exploration drilling. At the current regional stage of the basin knowledge, attention is attracted by rather large promising areas, but the main challenges here are associated with high geological risks and uncertainties. Summarizing the results of the studies of different years, taking into account discoveries in a similar basin, allows to identify a number of patterns and additional arguments in favor of the prospects within the area of interest.

Materials and methods
The comprehensive analysis of the results of geological and geophysical studies and publications of different years related to the North-West Kamchatka and the adjacent shelf has been carried out. Analogies have been found in the recent discoveries in another one-age basin of the Asian margin. An approach to the targeted assessment of the resource potential of the structures within the underexplored region has been proposed.

Keywords
Kamchatka shelf, Shelikhovsky basin, rift, eocene, paleocene, seismic exploration, outcrops

Natural classes of large resources of HC joining areas of Western Siberia and Siberian platform

Feliks S. Ulmasvay, Elena A. Sidorchuk, Svetlana A. Dobrynina

The article is devoted to the problem of forecasting hydrocarbon deposits in the junction zone of Western Siberia and the Siberian platform. Features of geodynamic processes can be used to increase the efficiency of prospecting. Geodynamic stresses of different genesis are one of the factors in the formation of the natural size classes of reserves and resources in the studying area. The activation of geodynamic processes in certain periods of the geological history of theregion led to the formation of non-structural and combined traps, the reformation of the conditions of occurrence of hydrocarbon accumulations.

DOI: 10.24411/2076-6785-2019-10070

Geophysics

Using geoelectrical prospecting for engineering-geocryological studies on objects of oil and gas infrastructure

Dmitry V. Kopylov, Marat R. Sadurtdinov

The results obtained by methods of electrical exploration and GPR in the area of hazardous engineering and permafrost processes in the territory of oil and gas facilities located in the cryolithozone are presented. On the geoelectric and GPR sections, the presence of ground ice lenses was determined from the contrast difference of electrical resistivity and amplitudes of electromagnetic waves, respectively. In the immediate vicinity of engineering structures, a significant decrease in electrical resistance is observed, presumably associated with the degradation of permafrost soils as a result of the technogenic impact of engineering structures on changes in snow accumulation and changes in surface and groundwater runoff. The high efficiency of geophysical methods in solving engineering and geocryological problems at the stages of design, construction and operation of engineering structures is shown.

Oil production

Improving the efficiency of oilfield equipment

Lenar . Akhmetzyanov

PJSC Tatneft implements a program to optimize production and reduce its own costs. Reducing the cost of operating onshore oilfield equipment is one of the most important tasks in the framework of the designated program. This article discusses technical solutions aimed at optimizing production processes in the field of exploitation of oilfield equipment.
In the process of a mechanized method of oil production by sucker-rod pumping units, there are a number of technical problems that have a serious impact on the efficiency of operation of the production stock of wells and, in general, on the volume of oil production. Such problems should include:
1) the imperfection of the existing valve designs for bleeding gases from the annular space of oil wells through tubing to the wellhead fittings, 2) the lack of the possibility of technological studies to measure the degree of congestion of SHGN ground drives equipped with a rotator, 3) intensive wear of stuffing boxes due to damage to the working surface polished stock.

DOI: 10.24411/2076-6785-2019-10061

Simulation of a magnetic field to substantiate the development of special couplings preventing deposition of ARP substances in tubing string

Anatoliy A. Isaev, Rustem S. Takhautdinov, Vladimir I. Malykhin, Almaz A. Sharifullin

Following the transition of most oilfields to the decline phase of development (mature oilfields) there are a growing number of problems related to oil well operation keep arising, particularly, formation of asphalt-resin-paraffin deposits (ARPD). The existing various solutions for the prevention of deposits of asphalt-resin-paraffin substances in downhole pumping equipment (DPE) do not make it possible to completely solve the problem, hence, the problem of ARPD removing is relevant. The ARPD problem in Sheshmaoil Management Company LLC exists on Uratminskoye oilfield, where the number of premature repairs reached 80 %.


DOI: 10.24411/2076-6785-2019-10060

The use of TTsV (thermal cyclic exposure) in the development of fields with high viscosity oils

Radmir R. Khaziev, Kseniya Yu. Koluzaeva

Thermal methods are promising for the extraction of high viscosity oils and bitumen. For most fields with high viscosity oils, thermal methods of exposure may be the only ones that allow industrial development. Thermal methods are expensive and economically feasible, mainly for medium and large deposits.


DOI: 10.24411/2076-6785-2019-10058

Interpretation of the results of tracer studies to assess the effectiveness of the technology of alignment of the reception profiles

Valentin A. Korotenko, Sergey I. Grachev, Timergaley K. Apasov, Gaydar T. Apasov, Mikhail M. Novoselov

The work considers the mutual influence of the operation of injection and producing wells. According to the results of the interpretation of tracer studies, the presence of seven channels of low filtration resistance was established. Calculations of the pore space volume of highly ntercalationlayers, permeability coefficients, pore channel radii, and mass of the adsorbed indicator are presented. The mass of the tracer lost as a result of diffusion processes is calculated. A method for determining the diffusion coefficient from the results of the interpretation of tracer studies is proposed. It is shown that the bulk of the pumped tracer during the movement from the injection to the production well is lost as a result of diffusion. After the technology of alignment of the injectivity profile (runway) in the injection well, the operating period of the producing well is analyzed. After repeated tracing studies, the presence of only one highly ntercalationinterlayer with less permeability and radius of the pore channel was found. The reasons for a slight change in the water cut coefficient after runway technology are established.

Experience in applying injection well recovery techniques

Taslia . Murtazina, Evgeniya E. Andreeva, Svetlana E. Valeeva

The fulfillment of design indicators in the development of oil fields while maintaining reservoir pressure by water injection largely depends on the effective operation of injection wells. The issues of preventing the loss of injectivity and identifying the main causes of its deterioration, against which it is necessary to develop effective methods for regulating the filtration-capacitive characteristics in the bottomhole formation zone, which can qualitatively and quantitatively restore it and, as a result, increase the coverage of the reservoirs with water flooding, and currently remain relevant in due to constantly changing formation conditions, economic costs and toughening environmental requirements.

DOI: 10.24411/2076-6785-2019-10057

Multistage hydraulic fractures geometry estimation based on information on fluid flow through fractures in a horizontal well

Petr V. Pyatibratov, Daniil S. Skorov

In this paper, we consider an approach to determining the geometrical parameters of fractures (half-length, effective permeability, height) of a horizontal well with multistage hydraulic fracturing, based on the automated history matching of the model (using the CMG CMOST software product) to the data on the flow of fluids from fractures obtained by the quantum tracer-based technologies. It is shown that the use of inflow profile data can significantly improve the quality of adaptation of the three-dimensional hydrodynamic model, as well as identify the fractures geometric parameters.

DOI: 10.24411/2076-6785-2019-10062

Thermodynamic modeling to assess the efficiency of liquid hydrocarbon recovery on the example of the Vuktylskoye oil-gas-condensate field

Olga A. Lobanova, Ilya M. Indrupskiy, Natalya A. Skibitskaya, Viktor A. Kryuchkov

The article considers the possibility of increasing the production of liquid hydrocarbons (oil and retrograde condensate) from a depleted oil-gas-condensate deposit on the example of Vuktylskoye oil-gas-condensate field. Increased production can be achieved by injection of a mixture of propane-butane fraction and reservoir gas or dry gas. The results of estimating production volumes of liquid hydrocarbons due to evaporation into the vapor phase during injection of dry gas and reservoir gas, both pure or enriched with propane-butane fraction in various concentrations, are presented. The minimum miscibility pressure is calculated for injection of dry gas enriched with the propanebutane fraction.

DOI: 10.24411/2076-6785-2019-10059

Oil refining

The analysis of use of rotary-disk devices in the processing of secondary petroleum products

Dmitry E. Suhanov, Anton V. Stepykin, Alexander E. Kuznetsov, Vladimir M. Ulyanov, Vadim A. Dikov, Artem S. Novoselov, Elena S. Kotlova, Alexander A. Shepalov

Features of calculation and selection of the equipment for a stage of cleaning for production of non-carcinogenic oils of plasticizers for tires, rubbers and plastics are stated. As a result of the study of the purification technique, it was found that it is inefficient to regenerate the oil according to traditional schemes in the presence of a solid phase dispersed into a liquid. In this regard, a rotary-disk type device was added to the cleaning scheme. It is shown that the process limits the kinetic region, so the delay time of particles in the sections of the apparatus will be the decisive factor. The dependences and methods for theoretical and experimental analysis of the performance of the device are proposed. As a result of the research, recommendations were also obtained that can be applied in the operation and development of technological adsorption equipment.


DOI: 10.24411/2076-6785-2019-10064

Pipeline

Tracking random nature of creep strength on pipeline materials, while assessing resistance power of pipelines' curved sections weighted by uniform coating

Sergey Shockiy

DOI: 10.24411/2076-6785-2019-10049

The paper presents the results of calculating the stresses in the wall of an underground pipeline loaded with pipeline solid weight in the angles of rotation on convex sections of the pipeline. Taking into account the random nature of the yield strength of tube steels, samples of actual values obtained for the material of pipes from different manufacturers, the strength of curvilinear sections of the main pipeline was evaluated. The necessity of individual selection of the weight of a pipeline solid weight for each section of the pipeline is justified taking into account the specific law and the dispersion limits of the yield strength of the pipe material used during the construction phase of the section.

Pipes

Progressive technologies for the drilling of oil and gas wells

Mikhail V. Pesin, Vladimir F. Makarov

DOI: 10.24411/2076-6785-2019-10053

Showing the relationship between the constructive and technological process of hardening threaded conical surface drill pipe (geometry of a strengthening of the movie, the size of the load, radius of hollow), magnitude and distribution of residual stresses in a threaded surface based on complex mathematical models developed and a series of pilot studies stress-strain state  threads and fatigue tests.

Ecology

Influence of development of deposits with super-visible oils, with non-traditional resources and natural bitumens on ecology

Tasliya M. Murtazina, Liliya Z. Anisimova, Il'mir R. Fakhrutdinov

DOI: 10.24411/2076-6785-2019-10054

One of the significant sources of the increase in reserves and oil production at the present stage are deposits of super-viscous oils (natural bitumen), the geological resources of which in the Republic of Tatarstan range from 1.5 to 7 billion. The fields of super-viscous oils have their own characteristics: small depths and sizes, oils have high density and viscosity.

Every year, as the oil industry develops, the technological impact on the environment and the geological environment is intensifying.

In the second half of the last century, the first symptoms appeared, indicating the alarming consequences of intensive mining.