ISSN 2413-5011

Scientific-technical journal

GEOLOGY, GEOPHYSICS

AND DEVELOPMENT OF OIL AND GAS FIELDS

                                                                                                               published since 1992

November 2015                                       ¹ 11                                   12 issues per year

 

CONTENÒS

 

OIL AND GAS PROSPECTING

 

Khoshtariya V.N., Trifonov A.N., Okishev R.N., Mammadov S.M., Kholodilov V.A. Some specific features of geological structure of the near-bottom area of the section in prospect evaluation and exploratory wells on the offshore license sites of JSC "Gazprom" and prevention of geological complications occurrence in order to optimize construction of wells (p. 4-9)

 

Bashkova S.E., Karaseva T.V. The forecast of oil-and-gas content of the deep horizons of the Volga-Ural NGP (p. 9-14)

 

Borodkin V.N., Kurchikov A.R., Nedosekin A.S., Smirnov O.A., She­stakova N.M. Specification of the boundaries of the Neocomian seismic-facies complexes within the water limits of the Kara Sea (p. 14-24)

 

Georgievskiy B.V., Bochkarev V.A. Assessment of probability of geo­logical success for the interdependent prospects in HC exploration (p. 25-39)

 

Yurova M.P. Paleo-facies conditions of black shale formation (p. 40-43)

 

Gridin V.A., Golovanov M.P., Tumanova E.Yu., Dementeev M.V. Conditions of natural reservoirs formation in the Pre-Mesozoic complex of the Western Pre-Caucasus (p. 43-47)

 

GEOCHEMICAL RESEARCH WORK

 

Kudamanov A.I., Karikh T.M., Kochetov A.V., Panev E.V. Some spe­cific features of clayish minerals distribution in the Cenomanian collectors of Russkoe field in the Western Siberia (p. 48-54)

 

Punanova S.A., Vinogradova T.L. Assessment of hydrocarbon systems genesis by geo-chemical data (p. 55-62)

 

DEVELOPMENT OF OIL AND GAS FIELDS

 

Soboleva T.I., Soboleva E.V. Experience and prospects of the technology applied to open productive formations on depression (p. 62-70)

 

 Gabnasyrov A.V. Forecasting of the direction of a formation hydraulic fracturing based on the assessment of the rocks’ stress-strain state (p. 70-72)

 

Information on the articles (p. 73-77)

 

 

Information on the articles

 

UDC 624.131.3:550.822.7:553

 

SOME SPECIFIC FEATURES OF GEOLOGICAL STRUCTURE

OF THE NEAR-BOTTOM AREA OF THE SECTION IN PROSPECT EVALUATION AND

EXPLORATORY WELLS ON THE OFFSHORE LICEN­SE SITES OF JSC "GAZPROM"

AND PREVENTION OF GEOLOGICAL COMPLICATIONS OCCURRENCE

IN ORDER TO OPTIMIZE CONSTRUCTION OF WELLS (ð. 4)

 

Khoshtariya Vladislav Nikolaevich,
Trifonov Alexey Nikolaevich,
Okishev Roman Nikolaevich

LLC "Gazprom geologorazvedka"

70, Hertsen str., Tyumen, 625000, Russian Federation,

tel.: (345) 254-09-54, (495) 428-55-00 (Moscow),

e-mail: v.khoshtariya@ggr.gazprom.ru, a.trifonov@ggr.gazprom.ru, r.okishev@ggr.gazprom.ru

 

Mammadov Samir Masudovich

LLC "NewTech Services"

31G, Shabolovka str., Moscow, 115162, Russian Federation,

tel.: (495) 363-68-74, fax: (495) 363-68-75,

e-mail: smammadov@nt-serv.com

 

Kholodilov Valentin Arsentievich

 

I. Gubkin Russian State University of Oil and Gas

65, Leninsky prosp., 119991, Moscow, Russian Federation,

tel.: (495) 428-55-00

 

The article examines the impact of geological complications associated with the structure of the upper section of the sedimentary cover, on the construction of prospect-appraisal and exploratory wells as well as the experience of conducting works on the seas shelves, both abroad and in Russia. The technique and stages of engineering-geological surveys implementation to choose the optimal locations of the floating that correspond to the well drilling point are discussed.

 

Key words: Pre-Yamal shelf; geological-engineering surveys; construction of an offshore well; risks of bottom gas opening; geological exploration activities.

 

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UDC 553.98(470.4/.5)

 

THE FORECAST OF OIL-AND-GAS CONTENT OF THE DEEP HORIZONS

OF THE VOLGA-URAL NGP (ð. 9)

 

Bashkova Svetlana Evgenievna

JSC "KamNIIKIGS"

15, Krasnoflotskaya str., 614016, Perm, Russian Federation,

tel.: (342) 244-13-03, fax: (342) 240-12-06,

e-mail: sbashkova@mail.ru

 

Karaseva Tatiana Vladimirovna

 

Perm State National Research University

15, Bukirev str., 614000, Perm, Russian Federation,

tel.: (342) 239-67-55

 

The forecast of oil-and-gas content of the deep horizons of the Volga-Ural NGP, located lower than 4…5 km is executed in the article on the basis of the results of complex synthesis of deep drilling. Structural and tectonic objects of the forecast of deep oil-and-gas content are allocated and estimated. As a result the territory of the province is divided into various prospective zones. Oil, gas and gas-condensate perspective areas of deep horizons are allocated at the southern and eastern regions of the Volga-Ural NGP.

 

Key words: oil-and-gas content; deep horizons; the forecast; the Volga-Ural NGP; deep wells.

 

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UDC 553.98(571.1)

 

SPECIFICATION OF THE BOUNDARIES OF THE NEOCOMIAN

SEISMIC-FACIES COMPLEXES WITHIN THE WATER LIMITS

OF THE KARA SEA (ð. 14)

 

Borodkin V.N.1, 2, Kurchikov A.R.1, Nedosekin A.S.3, Smirnov O.A.3, Shestakova N.M.3

 

1 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

 

2 Tyumen State Oil and Gas University

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

 

3 Federal State Unitary Scientific-Production Enterprise "Geologorazvedka"

 

Based on the analysis of the data of regional and areal seismic surveys in the Kara Sea, carried out earlier than lithofacies researches, substantiation of the boundaries of the Neocomian seismic-facies complexes in the water area, the forecast of the Achimov strata clinoform entities, associated with different sour­ces of terrigenous material removal, is presented.

 

Key words: the Western Siberia; the Kara Sea; the North Siberian threshold; Taimyr; New Earth; seismic facies complex; clinoform; "edges" of Neocomian shallow-marine terraces.

 

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UDC 550.8.012

 

ASSESSMENT OF PROBABILITY OF GEOLOGICAL SUCCESS

FOR THE INTERDEPENDENT PROSPECTS IN HC EXPLORATION (ð. 25)

 

Georgievskiy B.V., Bochkarev V.A.

 

"LUKOIL Overseas Service B.V."

Dubai Properties Group Headquarters building, TECOM, P.O. Box 500551, Dubai, United Arab Emirates,

e-mail: Vitaliy.Bochkarev@lukoil-overseas.com

 

Assessment of probability of geological success (POS) – one of the key tasks in the planning of exploration works, geological evaluation, analyses of resource base and economic models of exploration prospects. Methods of estimating the probability of geological success for interdependent multilayer reservoirs are analyzed in this paper. This type of prospects occurs most often in real geological situations. Firstly, models of multilayered pro­spect with independent reservoirs are analyzed; it shows the main patterns of variations in the total assessment of probability of geological success, depending on the estimation the success of individual layers. We consider the case of estimating the probability of geologic success, depending on the presence of shared risks (one or more geological criteria) for reservoirs as part of exploration prospect. Next, models of estimating the probability of geologic success, depending on the results obtained by the drilling of interdependent prospects are examined in details. These models are analyzed in terms of conditional probabilities and based on the determination of individual and shared success factors of interdependent prospects. Probability assessment sche­mes are studied on example of two geological models of exploration plays consisting of interdependent prospects.

 

Key words: probability of geological success (POS); interdependent prospects; strategy of exploration works; conditional probability; HC system; geological models.

 

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UDC 551.263.03+551.7.022

 

PALEO-FACIES CONDITIONS OF BLACK SHALE FORMATION (ð. 40)

 

Yurova M.P.

 

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

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

tel.: (499) 135-72-21,

e-mail: mpyurova@mail.ru

 

The article deals with the formation and accumulation of organic matter (OM) in black shale formations. Livello Bonarelli section in the Central Italy, where the distribution of chemical elements and geochemical conditions of black shales formation during the Oceanic anoxic event-2 (OAE-2) are studied, is taken as an example. Different points of view on the appearance and disappearance of OM abnormal concentrations in black shales sections are presented.

 

Key words: black shales; conditions of formation; points of view.

 

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UDC 550.8.052

 

CONDITIONS OF NATURAL RESERVOIRS FORMATION

IN THE PRE-MESOZOIC COMPLEX OF THE WESTERN PRE-CAUCASUS

(ð. 43)

 

Gridin V.A., Golovanov M.P., Tumanova E.Yu., Dementeev M.V.

 

North-Caucasian Federal University, Institute of Oil and Gas

16/1, Kulakov prosp., 355009, Stavropol, Russian Federation,

tel.: (8652) 94-62-11,

e-mail: gridinva@mail.ru

 

Commercial inflows of gas and condensate, numerous oil and gas shows (Kushchevskaya, Rasshevatskaya, Karmalinov­skaya and other areas) prove presence of oil-and-gas content in the Paleozoic sediments of the Western Pre-Caucasus. Regarding the development of collectors, ancient residual soils developed in Upper Paleozoic and Archean granitoids are of interest. The greatest prospects for oil-and-gas content of the Pre-Me­sozoic deposits are associated with coal formations within the northern and eastern parts of the Western Pre-Caucasus.

 

Key words: reservoir; forming; Paleozoic; the Western Pre-Caucasus.

 

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UDC 553.98.061.17

 

SOME SPECIFIC FEATURES OF CLAYISH MINERALS DISTRIBUTION

IN THE CENOMANIAN COLLECTORS OF RUSSKOE FIELD

IN THE WESTERN SIBERIA (ð. 48)

 

Kudamanov Alexander Ivanovich,
Karikh Tatiana Mikhailovna,
Kochetov Alexey Valentinovich,
Panev Evgeny Vladimirovich

 

LLC "Tyumen Oil Scientific Center" (LLC "TNNC")

42, Maxim Gorky str., 625048, Tyumen, Tyumen region, Russian Federation,

tel./fax: (345) 279-27-81,

e-mail: aikudamanov@rosneft.ru, avkochetov@rosneft.ru, tmkarikh@rosneft.ru, tvpanev@rosneft.ru

 

Cenomanian terrigenous sediments (productive reservoirs-collectors, PC) lie at the depth of 0,8...0,9 km, characterized by a relatively low degree of sludge diagenetic transformation and have poor cementation. As a result, core studies fixed different composition of the clay cement of reservoir rocks. The article shows what caused the sediments increased swelling when sti­mulating the formation.

 

Key words: Cenomanian; PC formations; sediments accumulation environment; kaolinite; chlorite; diagenesis; thin secti­ons; bioturbation; intraclasts; transgression; regression; erosion.

 

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UDC 553.98:550.4

 

ASSESSMENT OF HYDROCARBON SYSTEMS GENESIS

BY GEO-CHEMICAL DATA (ð. 55)

 

Punanova Svetlana Alexandrovna,
Vinogradova Tatiana Lvovna

 

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

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

tel.: (499) 135-72-21,

e-mail: punanova@mail.ru

 

The study of supergene-altered (biodegraded) and immature fluids is carried out on the basis of hydrocarbon (HC) and micro-element (ME) indicators. Informative and universal criteria of distinction are estimated to which the values of ratios by steranes such as 20S/(20S + 20R), bb/(bb + aa), 20S/20R, diasteranes/regular steranes as well as the ratio of HC-biomarkers: olea­nanes/G30, moretane/G30, gammacerane/G30 are referred. Differentiation of oils by ME content showed that the supergene-altered oils are secondary enriched by ME. Oil of this genesis create metallo-genic provinces of vanadium (V/Ni>1) type with HC deposits, commercially enriched by V, Ni, U, Mo, and other ME.

 

Key words: hydrocarbon systems; supergenesis; immature fluids; micro-elements.

 

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UDC 622.24.002.2+622.245.7

 

EXPERIENCE AND PROSPECTS OF THE TECHNO­LOGY APPLIED

TO OPEN PRODUCTIVE FORMATIONS ON DEPRESSION (ð. 62)

 

Soboleva Tatjana Ivanovna

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

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

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

 

Soboleva Elisaveta Viktorovna

 

LLC "LUKOIL–Perm"

62, Lånin str., 614990, Perm, Russian Federation,

e-mail: SobolevaELV@mail.ru

 

The general directions of increasing the quality of an autopsy productive formations opening are considered.

The advantages and disadvantages of the technology applied to open producing formation on depression are presents.

Some well-killing fluid and technology of conducting activities, excluding the negative impact on the reservoir properties of producing formations, are developed.

It is shown that opening of producing formation on depression is the radical method of preserving the natural reservoir properties and wells high productivity.

 

Key words: potential production rate; opening of a producing formation; wells completion; negative pressure drop; opening on depression; stimulation of inflow; secondary opening by perforation.

 

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UDC 622.234.573

 

FORECASTING OF THE DIRECTION OF A FORMATION HYDRAULIC FRACTURING

BASED ON THE ASSESS­MENT OF THE ROCKS’ STRESS-STRAIN STATE (ð. 70)

 

Gabnasyrov Alexey Vasilevich

 

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

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

tel.: (342) 233-64-26,

e-mail: A.Gabnasirov@rambler.ru

 

At the present level of project development of a formation hydraulic fracturing (FHF) a lot of researches aimed at the cracks design of after FHF is carried out, but, herewith, there is no opportunity to take into account its position in space while the resulting main hydraulic fracture and the accompanying cloud of micro-cracks can reach the volume of 150000 m3. This is a significant area of increased permeability and for the success of a formation hydraulic fracturing it is necessary to understand where exactly it will be located.

This paper considers the problem of predicting of the direction of man-made cracks, which appear during a formation hydraulic fracturing: the theoretical aspects of prediction, the effect of the stress state-strain of rocks on the development of a man-made fracturing, the change of stress-strain state of rocks in the development process. The assumption is made about the possibility of predicting of the direction of a formation hydraulic fracturing on the basis of the analysis of a deposit energy state.

It is concluded that each geological block and the dome has its own system of stresses orientation, being not stationary but a dynamic one.

 

Key words: hydraulic fracturing; reservoir pressure; stress; geo-mechanics.

 

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