Geology, Geophysics and Development of Oil and Gas Fields

When carrying out geological-economic justification of evaluation of promising exploration areas in the territories with a high degree of knowledge, the problem of the amount of the remaining non-localized HC resources is very urgent. The authors proposed a method to estimate the non-localized resource of D₁ and D₂ categories by applying the differentiated technique based on the elementary cells system, reasonable for each structural-facies zone of Devonian terrigenous complex of deposits.

Keywords: Devonian terrigenous oil and gas complex; non-localized resources; geological and geochemical indicators; elementary cells; statistical models; probabilistic criteria of oil bearing; differential distribution of resources.

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UDC 550.812:551.73(470.53)

THE AGE AND CORRELATION OF PRODUCTIVE SAND FORMATIONS

(ON THE EXAMPLE OF DEPOSITS LOCATED IN THE SOUTH-EAST

OF PERM REGION) (p. 9)

Stukova Tatyana Victorovna

"PermNIPIneft", a branch of LLC "LUKOIL–Engineering" in the city of Perm

29, Sovetskaya Armiya str., 614066 Perm, Russian Federation,

tel.: (342) 233-64-99,

e-mail: Tatjana.Stukova@pnn.lukoil.com

The paper specifies the important aspects that are to be considered when differentiating and correlating complexly-built productive Visean terrigenous stratum. The oil- and gas-bearing area in the south-east of Perm region in Early Visean age was the transition zone from land to sea, where shifting of the shoreline and migration of the river delta components periodically occurred. The Radaevsko-Tula time interval is characterized by cyclic sedimentation (alternation of transgressive and regressive cycles), which manifests itself in the deposits poly-facial composition. The full genetic series of sand bodies such as the delta canals, coastal accumulative formations separated by a great number of clay rock layers was formed in this zone. The complex combinations of permeable and dense deposits of different genesis in Radaevsky-Tula terrigenous stratum make their differentiation and correlation difficult when applying the geophysical methods. The role of cyclic-stratigraphic, palino-logical and litho-facial analyses when dating the age and comparing sand formations is shown. The examples of deposits differentiation and sand formations correlation are given.

Keywords: cyclic-stratigraphic method; palino-logical method; litho-facial analyses; miospores; productive sand formations; differentiation; correlation.

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UDC 550.8.02:553.98:551.72

RESTORATION OF PALEO-GEOGRAPHIC SPECIFIC FEATURES OF FORMATION

AND SEDIMENT-LOGICAL STUDIES OF THE LOWER CRETACEOUS SEDIMENTS

OF ACHIMOV SEQUENCE IN THE CENTRAL PART OF WESTERN SIBERIA

(YUGANSK MEGA-DEPRESSION) (p. 14)

Galinsky Kirill Alexandrovich

Industrial University of Tyumen (IUT)

38, Volodarsky str., 625000, Tyumen, Russian Federation,

e-mail: galinsky@crru.ru

Icon Elena Vladimirovna,

Illarionova Alyona Mikhailovna

V.I. Shpilman Scientific-Analytical Rational Mining Center

Borodkin Vladimir Nikolaevich

A.A. Trofimuk Institute of Petroleum Geology and Geophysics, the West-Siberian branch, RAS (IPGG, WSB SO RAS)

56, Volodarsky str., 625000, Tyumen, Russian Federation,

tel.: (345) 246-58-27,

tel./fax: (345) 246-56-02,

e-mail: niigig@tmnsc.ru

The article deals with studying of Yugansk mega-depression, which differs by ambiguous spatial relationships between the individual structural and tectonic elements. Construction of the correlation schemes in this area causes some difficulties due to the lack and unevenness of drilling and seismic studies, uncertain nature of litho-facies variability of Lower Cretaceous sediments.

Thus, the main problems to be solved are creation of a unified system of formations reservoir indexation, a detailed study of Achimov deposits genesis, specific features of their formation and distribution, as well as creation of the most complete and detailed model of the structure and formation of Achimov sequence.

Keywords: sedimentological studies; Achimov deposits; correlation scheme.

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UDC 551.7

GEOLOGICAL STRUCTURE AND PETROLEUM POTENTIAL PROSPECTS

OF THE CONTINENTAL MARGINS OF THE NORTH-WEST EUROPE (p. 22)

Zabanbark A., Lobkovsky L.I.

Federal State Budgetary Institution of Science "P.P. Shirshov Institute of Oceanology, Russian Academy of Sciences"

36, Nakhimovsky prosp., 117997, Moscow, Russian Federation,

tel.: (499) 124-59-90,

e-mail: azaban@ocean.ru

Water areas of Ireland are represented by a great number of major and minor sedimentary basins: such as Rokoll, Porcupine, Sliney, Erris and Clare in the Atlantic Ocean in the west of the country, Gobban Spew, North-Celtic, South-Celtic, Fasnet and St. George in the Celtic Sea, in the south and Central Irish, East Irish, Kish Bank and Peel in the Irish sea, in the east of the country. All pools are submerged under the waters of the Atlantic Ocean, the Celtic Sea and the Irish Sea at the depth of 10 m in the Irish Sea up to 3500 m in the Atlantic Ocean. The pools age is Permian-Triassic, they are filled with sedimentary formations of Phanerozoic age thickness of 3…15 km. Hydrocarbons in the pools sections are presented by reservoirs of the Lower Cretaceous, Jurassic and Triassic ages, impermeable beds of the Cretaceous, Jurassic and Triassic formations. The prospects of oil and gas potential are associated with the Mesozoic, especially the Lower Mesozoic, sediments.

Keywords: pool; oil; gas; deposit; oil and gas content; age; reserves.

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UDC 553.98.061.15

HYDRODYNAMIC MODELING OF A HYDRATE DEPOSIT (p. 30)

Dmitrievsky Anatoly Nikolaevich¹,

Karakin Andrey Vladimirovich¹,

Poveshchenko Yury Andreevich^{2, 4},
Kazakevich Grigoriy Il’ich³

Rahimli Parvin Ilgar Kizi⁵

¹Oil and Gas Research Institute Russian Academy of Sciences (OGRI RAS)

3, Gubkin str., 119333, Moscow, Russian Federation,

e-mail: A.Dmitrievsky@IPNG.ru, avkarakin@gmail.ru

²Keldysh Institute of Applied Mathematics Russian Academy of Sciences

4, Miusskaya sq., 125047, Moscow, Russian Federation

³Shirshov Institute of Oceanology Russian Academy of Sciences

36, Nakhimovskiy prosp., 117997, Moscow, Russian Federation,

e-mail: gkazakevich@yandex.ru

⁴National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)

31, Kashirskoe shosse, 115409, Moscow, Russian Federation,

e-mail: hecon@mail.ru

⁵Moscow Institute of Physics and Technology (State University)

9, Institutskiy per., Dolgoprudny city, 141701, Moscow Region, Russian Federation,

e-mail: pervin@rehimli.info

The paper presents the hydrodynamic zero-dimensional modelling of a gas-hydrate deposit on the example of Messoyakhsky field. Some specific nature of this deposit that became evident during its development is an indirect proof of gas-hydrate availability. Gas hydrate dissociation began not simultaneously with the moment of its development, but only some time later. The aim of this paper is to estimate the reserves of this deposit with account of the gas hydrate component. The inverse task is solved by the search method of a direct task parameters as well as by means of adding fictitious sources.

Keywords: hydrodynamic modeling; gas hydrates; Messoyakhsky field.

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UDC 550.8.072(574)

NEW DATA OF THE TECTONIC MODEL OF ZHALGIZTYUBE DEPOSIT (p. 35)

Karamurzaeva Aynur Bolatbaevna

Kazakh Scientific-Research and Design Institute of Oil and Gas (JSC "KazNIPImunaigaz")

2, 6 microregion, 130000, Aktau, Mangistau region, Republic of Kazakhstan,

tel.: (7292) 47-03-72, 47-02-65,

fax: (7292) 47-02-80,

e-mail: zhansaya_alan@mail.ru

This paper considers the new data of Zhalgiztyube deposit tectonic model and their comparison with the previous accepted model. Special attention is paid to the study of the deposit tectonics, being the objective of carrying out the work.

New materials confirm the disturbance of Zhalgiztyube structure of both the Pre-Jurassic and the Jurassic-Cretaceous deposits.

In general, re-interpretation of 3D seismic survey data together with the well drilling data resulted in development of a tectonic model, which differs from the earlier adopted one. Considerable attention was paid to the network of tectonic faults, the location of the main northern fault F₁ (fault F₁₈ of the previous work) is proved and about occurrence of 13 new small-amplitude, non-striking and differently-oriented faults with the amplitude of less than 10 m are mapped.

The paper proposes a new reallocation of blocks, where the location of none of the new "feathering" faults, striking in the direction from the north-west to the south-east, coincide with the presented earlier in plan. Fault F₁ was identified for the first time during exploration by means of seismic reflection method and confirmed during the following prospecting works carried out by of 2D, 3D CDP method.

Keywords: tectonic model; the Jurassic-Cretaceous complex of deposits; well; horizon; tectonic fault; deposit; block; dome.

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UDC 622.24.085.24(470.53)

EXPERIENCE OF MULTILATERAL WELLS USE TO INCREASE

THE OIL DEPOSITS EFFICIENCY LOCATED IN THE PERM REGION (p. 39)

Mukaev Rashit Khasanyanovich

"PermNIPIneft", a branch of LLC "LUKOIL–Engineering" in the city of Perm

29, Sovetskaya Armiya str., 614066, Perm, Russian Federation,

tel.: (342) 233-64-51,

e-mail: Rashit.Mukaev@pnn.lukoil.com

This paper describes the areas of effective use of multilateral wells, as well as their actuality for the conditions of the geologically complicated deposits of oil fields in the Perm region. The results of multilateral wells use during pilot implementation are presented.

Keywords: multilateral wells; complicated geological structure; efficiency of development; enhanced oil recovery.

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UDC 622.243.24

SPECIFIC FEATURES OF GEOLOGICAL MONITORING OF HORIZONTAL

WELLS DRILLING IN RESERVOIR BEDS OF COMPLEX STRUCTURE

(AS IN THE CASE OF V.N. VINOGRADOV FIELD) (p. 43)

Starosvetskov Valery Vitalievich,

Kashnikov Oleg Yurievich

"VolgogradNIPImorneft", a branch of LLC "LUKOIL–Engineering" in the city of Volgograd

96, Lenin avenue, 400078, Volgograd, Russian Federation,

tel.: (8442) 96-77-87,

e-mail: vstarosvetskov@lukoilvmn.ru

This article presents practice of geological monitoring of horizontal wells drilling in V.N. Vinogradov field. The main specific features of pay bed geological section affecting the choice of well logging suite used during geological monitoring of drilling are determined, and the main reasons for inefficiency of azimuthal survey methods use are analyzed. The main subsurface uncertainties occurring during tangent section and horizontal well drilling are described, and the main techniques used for drilling of wells’ horizontal sections in the target bed are presented.

Keywords: hard-to-recover reserves; geo-steering; subsurface uncertainties; V.N. Vinogradov oilfield.

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UDC 550.8.023

EXPERIMENTAL STUDY OF RELATIVE PHASE PERMEABILITY AND FACTORS

OF OIL REPLACEMENT BY WATER IN COMPLICATEDLY-COMPOSED RESERVOIRS

(p. 49)

Gubaidullin Marsel Galiullovich,

Yuriev Alexander Vyacheslavovich,

Belozerov Ivan Pavlovich

Northern (Arctic) Federal University named after M.V. Lomonosov

17, Northern Dvina embankment, 163002, Arkhangelsk, Russian Federation,

e-mail: m.gubaidulin@narfu.ru, a.yurjev@narfu.ru, i.belozerov@narfu.ru.

The article describes the procedure and results of laboratory research on determination of relative phase permeability and factors of oil displacement by water in complicatedly-composed reservoirs as well as the analysis of the factors influencing them. The work is aimed at analyzing the results of studies on core samples of different sizes from one of the fields of Timan-Pechora oil- and gas-bearing province in Russia.

The standard-sized core samples and the core samples with a preserved diameter of drilling (full–sized core) were subjected to studying. Eight full-sized core samples and 17 standard-sized core samples were selected for the collection. The samples are characterized by different petrophysical properties.

During the experiments, there obtained the data required to analyze the effect of samples geometrical dimensions and other indicators on the results of determination of relative phase permeability and factors of oil replacement by water on the core samples of complicatedly-composed reservoirs. A comparative analysis of the indicators of the factors of oil replacement by water, residual water and oil saturation was conducted by using the standard-sized core samples with and full-sized ones. Based on the results obtained, it is possible to more accurately characterize the physical-hydrodynamical image of the reservoir. The graphs showing the determined values differences depending on the deposit from the interval under study, geometric dimensions of the samples and their wettability were constructed.

Keywords: full-sized core samples; standard-sized core samples; wettability; factor of oil replacement by water; relative permeability during oil and water joint flowing; reservoir; water repellency; Timan-Pechora petroleum province.

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