Geology, Geophysics and Development of Oil and Gas Fields

¹West-Siberian affiliate of A. Trofimuk Institute of Oil and Gas Geology and Geophysics, Siberian branch of the Russian Academy of Sciences (ZSF INNG SO RAN)

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

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

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

e-mail: niigig@tmnsc.ru

²Tyumen State Oil and Gas University

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

Nedosekin A.S., Smirnov O.A.

LLC "INGEOSERVICE"

Based on a comprehensive analysis of geological and geophysical data within the area under study Achimov strata are selected as the reference horizon for conducting prospecting activities. A series of promising objects, being the part of the strata, are mapped for further drilling of the optimal amount of planned exploration wells. Wells, along the way, will assess the lithologic objects in BU₁₆, BU_17–19 and BU₂₀ formations. Exploration drilling is planned on lithologic gas condensate deposit of BU¹₁₇ formation.

Key words: reference horizon; exploration activities; lithologic objects; exploratory drilling.

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UDC 522.578.061.32:551.733.3(470.26)

LOWER PALEOZOIC STRATA OF KALININGRAD REGION

AS POTENTIAL SOURCES OF SHALE OIL (р. 12)

Otmas Alexander Avgustovich,
Kokhanova Anna Nikolaevna,
Otmas Andrey Alexandrovich,
Grigoriev Gennady Alexeevich

Federal State Unitary Enterprise "All-Russia Petroleum Research Exploration Institute" (FGUP VNIGRI)

39, Liteiny prosp., St.-Petersburg, 191014, Russian Federation,

tel.: (812) 275-23-05,

fax: (812) 275-57-56,

e-mail: AAOtmas@yandex.ru, ins@vnigri.ru

Kaliningrad region is a potentially promising region for the exploration and development of shale hydrocarbons. Based on the carried out studies, the main objects subject for advanced prospecting of this kind of raw material are identified; oil source strata of Silurian deposits are studied; the extent of hydrocarbon generation and its residual potential are determined. Some preliminary assessment of in-situ and recoverable resources of oil from Lower Silurian shale strata is made, economic possibilities of their development are estimated.

Key words: hydrocarbons; shale strata; Silurian; katagenesis; generation; resources; Kaliningrad region.

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UDC 550.832+552.54

STRUCTURE, OIL AND GAS POTENTIAL AND RISKS OF DEVELOPMENT

OF LOWER CRETACEOUS SEDIMENTS OF THE WESTERN PART

OF RAKUSHECHNO-SHIROTNY SYSTEM OF UPLIFTS (р. 18)

Dorofeev Nikita Vladimirovich,
Bochkarev Anatoly Vladimirovich,
Simonova Evgenia Borisovna,
Filippova Polina Borisovna

LLC "Lukoil–Engineering"

2, Suschevsky Val str., 127055, Moscow, Russian Federation,

tel.: (495) 983-22-86, 983-22-94,

fax: (495) 983-21-41,

e-mail: LUKOIL-Engin@lukoil.com

Rakushechno-Shirotnaya uplift system consists of three arc-shaped narrow swells (North-Rakushechny, Central Rakushechny, South Rakushechny) and with account of the research degree, prospects and other indicators is divided into two parts – eastern and western. The eastern part maintains high prospects for identifying new deposits of different hydrocarbon composition and size of reserves (from small to large). The western part is promising for occurrence of small gas-condensate deposits in the Albian sediments and oil deposits in the Aptian sediments of the Central Rakushechny swell and is an unpromising one in the rest non-drilled western part of South Rakushechny swell. Comprehensive substantiation of local structures prospects within the boundaries of the western part of Rakushechno-Shirotny uplift system allows minimizing the risks of negative results of its development (opening of water-saturated reservoirs or small oil accumulations with low oil recovery factor in the Jurassic-Cretaceous sediments) and preventing the financial expenditures of sub-soil assets users on preparation of the structures and drilling of non-productive wells within their boundaries, getting away from wasting time on their drilling in difficult geological conditions and focusing efforts on really promising oil and gas areas.

Key words: Rakushechno-Shirotny uplift system; South Rakushechny swell; background; generation; oil; gas-condensate; reformation; degradation; oil composition and properties; oil recovery factor.

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UDC 550.834.05(553.98)

APPLICATION OF GEOLOGICAL-GEOPHYSICAL DATA

WHEN PREDICTING GAS POTENTIAL OF THE VENDIAN TERRIGENE COMPLEX

OF ANGARA-LENA GAS-BEARING ZONE (р. 26)

Skuzovatov Maxim Yurievich

Trofimuk Institute of Petroleum Geology and Geophysics SB RAS

3, Acad. Koptyug prosp., Novosibirsk, 630090, Russian Federation,

tel.: (383) 306-63-70,

fax: (383) 306-63-70,

e-mail: SkuzovatovMJ@ipgg.sbras.ru

The article analyzes some specific features of the geological structure of the Vendian terrigenous complex of the central part of Angara-Lena stage (Irkutsk region). It is concluded that reservoirs prognosis effectiveness, based on seismic methods, is provided by inter-relation between petro-physical and acoustic properties that is more typical for Parfenovsky horizon on Kovykta gas field. For Bokhan and Bazal horizons such relationship is hard to find because of its poor petro-physical data. Based on the results obtained, the most prospective areas are identified for further geological-geophysical prospecting.

Key words: Parfenovsky horizon; Kovykta field; Angara-Lena field; seismic reflection amplitudes; porosity; gas potential prospects.

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UDC 553.98(470.62)

ANALYSIS OF HYDROCARBONS GENESIS

OF BEYSUG GAS FIELD (р. 33)

Kornitsky P.M.

Kuban State University

149, Stavropolskaya str., 350040, Krasnodar, Russian Federation,

tel.: (861) 219-96-34,

e-mail: Pasha21vek@mail.ru

The article describes the main theoretical aspects of the relationship of helium and gas potential, seven of them are allotted. The analysis of hydrocarbons of Beysugsky field is also carried out which served the basis for developing of fluid-dynamic model of formation of the field under consideration. The analysis resulted in making the following conclusion: connection of helium potential and gas potential of some definite gas field is proved on the example of Beysugsky gas field by indirect evidence (presence of increased-concentration helium in gas composition as well as nitrogen, "foundation elevation", tracking of listric faults). This connection is provided by the existence of the three-element system, namely, the deeply-seated source, the supply channel, the deposit.

Key words: Beysugsky gas field; genesis; hydrocarbons.

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UDC 550.812.1

PRIORITY AREAS FOR OIL AND GAS PROSPECTING WORK

IN THE SOUTH-WEST OF THE TAJIKISTAN REPUBLIC (р. 37)

Sadrtdinov Ruslan Faritovich

"Gazprom International"

4A, Novodanilovskaya nab., 117105, Moscow, Russian Federation,

tel.: (495) 411-87-33,

e-mail: R.Sadrtdinov@zargaz.ru

Potential areas for exploration for oil and gas prospecting work in the south-west of the Tajikistan Republic are considered in the article. As a result of the G&G data analysis it is concluded that at present the top priority area for exploration activities is Paleogene-Cretaceous under-thrust deposits. Jurassic subsalt deposits have high hydrocarbon potential, but as of today they are considered as the most technically difficult area.

Key words: Afghan-Tadjik depression; allochthon; autochthon; pool; oil and gas potential; sedimentary rock; subsalt deposits; structure.

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UDC 536:622.279.031

THERMO-HYDRO-DYNAMIC RESEARCH

OF VERTICAL GAS WELLS (р. 43)

Shamsiev M.N.^{1, 2}, Talipova A.A.¹

¹Institute of Mechanics and Engineering KazSC RAS

2/31, Lobachevsky str., 420111, Kazan, Russian Federation,

tel.: (843) 292-93-45,

e-mail: Shamsiev@mail.kcn.ru, aian18@mail.ru

²Kazan (Volga Region) Federal University

18, Kremlevskaya str., 420008, Kazan, Russian Federation

A method applied for interpretation of the results of vertical wells’ thermo-hydrodynamic researches based on the theory of incorrectly posed problems of mathematical physics is proposed. It is shown that reservoir thermo-physical and porosity-permeability parameters can be assessed by the results of temperature measurements at the well bottom of the well after the well’s putting into operation.

Key words: vertical gas wells; thermodynamic studies; regularization.

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UDC 622.02:531+622.83

DEVELOPMENT OF GEO-MECHANICAL MODEL FOR PREDICTION

OF CHANGES OF FRACTURE-PORE TYPE RESERVOIR PROPERTIES

DURING RESERVOIR PRESSURE DECREASE (WITH THE EXAMPLE

OF ACHIMOV DEPOSITS OF OIL AND GAS FIELDS

OF THE FAR NORTH) (р. 47)

Popov Sergey Nikolaevich

Oil and Gas Research Institute Russian Academy of Sciences

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

tel.: (499) 135-71-81,

e-mail: popov@ipng.ru

Mazanov Sergey Vladimirovich,
Zharikov Maksim Gennadyevich

"Gazprom Dobycha Urengoy"

8, Zheleznodorozhnaya str., 629307, Novy Urengoy , Russian Federation,

tel.: (349) 494-84-09,

e-mail: gdu@gd-urengoy.gazrom.ru, m.g.zharikov@gd-urengoy.gazrom.ru

This paper discusses the results of testing of core monolithic samples and core fractured samples from Achimov deposits of Urengoyskoye oil-gas-condensate field. Analytical dependencies describing the reduction of the samples’ porosity and permeability while reservoir pressure decrease are selected. Geo-mechanical model to predict the changes of reservoir properties of Achimov deposits caused by productive strata deformation of for fracture-pore type reservoir is developed.

Key words: reservoir deformations; effective stresses; reservoir properties; fracture-pore type reservoir; porosity; permeability; Achimov deposits.

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UDC 622.279.23/.4(470.63)

SOME SPECIFIC FEATURES OF CONDUCTING GEO-TECHNICAL OPERATIONS

AT THE CAUCASUS SMALL FIELDS (р. 55)

Gasumov Ramiz Alijavad,

Nelepov Sergey Viktorovich

JSC "SevKavNIPIgaz"

419, Lenin str., Stavropol, 355035, Russian Federation,

tel.: (865) 235-96-75, 235-94-11,

e-mail: svnipigz@gazprom.ru, NelepovSV@scnipigaz.ru

The article deals with some common specific features and problems which can occur when conducting geological and technical measures (GTM) at small fields. When planning GTM, the following should be taken into consideration:

● small hydrocarbon residual reserves and low current reservoir pressure;

● complexity of application of the analogies method to be applied at the fields developed under gas and elastic water modes;

● low production rates of wells;

● limited selection of wells-"candidates" to be subjected to conducting of GTM, the necessity of individual approach to the choice of GTM type and technology of its conducting for each well;

● economic evaluation of the predicted return on investments results in a complex choice of the contractor and material-technical base required for carrying out geological and technical measures to maintain and improve the quality of wells functioning.

Key words: small fields; natural gas; analysis of fields’ development; wells production; geotechnical operations.

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JSC "ALL-RUSSIAN SCIENTIFIC-RESEARCH INSTITUTE OF ORGANIZATION, MANAGEMENT AND ECONOMICS OF OIL AND GAS INDUSTRY"

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