ISSN 2413-5011

Scientific-technical journal

GEOLOGY, GEOPHYSICS

AND DEVELOPMENT OF OIL AND GAS FIELDS

                                                                                                             published since 1992

February 2016                                          ¹ 2                                     12 issues per year

 

CONTENÒS

 

OIL AND GAS PROSPECTING

 

Putilov I.S., Galkin V.I. Some specific features of using new criteria when predicting oil and gas potential of the structures of different tectonic elements in Perm region (p. 4-7)

 

Vakhnin M.G. Level of exploration and prospects of hydrocarbon potential of Mezen syneclise (p. 8-13)

 

Astakhov S.M. Seismic and tectonic activity influence of subsoil assets on the secondary migration of hydrocarbons (p. 14-21)

 

GEOPHYSICAL RESEARCH WORK

 

Akhmetov R.T., Mukhametshin V.Sh., Andreev V.E. Field geophysics forecast of productive reservoir wettability index (p. 21-25)

 

Bolshakov Yu.Ya., Batyrov Yu.V. Effect of capillary forces on water and oil distribution in natural traps of Kogalym field (p. 25-30)

 

DEVELOPMENT OF OIL AND GAS FIELDS

 

Sokolov V.S., Epifantsev A.S. Efficiency enhancement of a field development with very complex geological structure (p. 30-35)

 

Mashtakov A.S. Assessment of engineering-geological hazards when developing the Caspian Sea offshore fields (p. 35-42)

 

Eliseev A.N., Urusov S.A., Lepikhin V.A., Makhmutov A.A., Tupitsyn A.M. Clay distribution nature in permeability-different sand collectors and its impact on the reservoir characteristics and liquid inflow towards well-bottoms in Vakhitov field (p. 42-46)

 

Salavatov T.Sh., Mustafayev K.I., Salavatova R.Sh., Abbasova S.V., Mansurova S.I., Habibullaeva Sh.A. Possibility of early diagnosis of a reservoir – well changes in field conditions (p. 46-49)

 

THEORETICAL ASPECTS IN GEOLOGY

 

Ogonyan A.A., Suturin A.S., Kushnikov A.M. A hypothesis of oil and gas fields generation on the Siberian platform (p. 50-54)

 

Information on the articles (p. 55-60)

 

 

Information on the articles

 

UDC 553.98(470.53)

 

SOME SPECIFIC FEATURES OF USING NEW CRITERIA

WHEN PREDICTING OIL AND GAS POTENTIAL OF THE STRUCTURES

OF DIFFERENT TECTONIC ELEMENTS IN PERM REGION (ð. 4)

 

Putilov Ivan Sergeevich

 

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

29, Sovetskaya Armiya str., 614022, Perm, Russian Federation,

tel.: (342) 233-64-58,

e-mail: putilov@permnipineft.com

 

Galkin Vladislav Ignatievich

 

Perm National Research Polytechnic University

29, main bld., office 312, Komsomolsky prosp., 614990, Perm, Russian Federation,

tel./fax: (342) 219-80-17,

e-mail: gng@pstu.ru

 

Structural attributes of the reflecting horizons which together with the earlier applied criteria of oil and gas potential can be used for prediction of small-size structures are developed. Some probabilistic-statistical models to predict oil and gas potential of small-sized structures of different tectonic elements in Perm region are built.

 

Key words: oil and gas potential; small-size structure; seismic survey.

 

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UDC 550.81

 

LEVEL OF EXPLORATION AND PROSPECTS OF HYDROCARBON POTENTIAL

OF MEZEN SYNECLISE (ð. 8)

 

Vakhnin Mikhail Gellerovich

 

Institute of Geology, Komi Scientific Center, UB RAS

54, Pervomayskaya str., 167982, Syktyvkar, Komi Republic, Russian Federation,

tel.: (821) 224-52-18,

e-mail: oilkominc@mail.ru

 

Mezen syneclise is one of the most poorly-studied territories of the European North with unclear prospects of hydrocarbon potential. The article analyzes the level of exploration, geological structure of the syneclise as well as evaluates its prospects for oil and gas fields’ availability. The characteristic of the sedimentary cover including two structural tectonic stages of development: Riphean-Vendian and Post-Devonian is given. The article also analyzes the syneclise tectonic structure and some specific features of the stratigraphic complexes, presence of reservoir strata and seals. It is shown that the regions with the highest thickness of the Paleozoic complex in the east of the syneclise are characterized by a high probability of discovery of small and medium hydrocarbon deposits. The areas with potential petroliferous Upper Riphean sediments are outlined. The Proterozoic sub-saliferous strata possess a considerable hydrocarbon potential in Vychegda trough. In the area of Koslan nose and Safonov trough there identified promising objects with good reservoirs in uftyugskaya suite and presence of regional ust-pinezhskaya seal.

 

Key words: Mezen syneclise; Vychegda trough; Storozhevskaya structure; Seregovskaya structure; hydrocarbon potential; hydrocarbons.

 

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UDC 553.98

 

SEISMIC AND TECTONIC ACTIVITY INFLUENCE OF SUBSOIL ASSETS

ON THE SECONDARY MIGRATION OF HYDROCARBONS (ð. 14)

 

Astakhov Sergey Mikhailovich

 

LLC "KONTIKI Exploration"

13V, Shkolnaya str., Myskhako settl., 353993, Novorossyisk, Russian Federation,

tel.: (861) 771-80-40,

e-mail: s@kontiki-exploration.com

 

This paper contains new materials that illustrate the impact of seismic activity on the secondary migration of hydrocarbons. The main factor influencing the value of this impact is some increase of the rocks’ permeability after the earthquakes of various magnitude. Tectonic stress plays an ambiguous role in the secondary migration.

 

Key words: secondary migration; hydrocarbons; seismic and tectonic stress; permeability; earthquake.

 

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UDC 622.276.031

 

FIELD GEOPHYSICS FORECAST OF PRODUCTIVE RESERVOIR

WETTABILITY INDEX (ð. 21)

 

Akhmetov Rasul Tukhbatullovich,

Mukhametshin Vyacheslav Sharifullovich,

Andreev Vadim Evgenyevich

 

Ufa State Petroleum Technical University, branch in Oktyabrsky-city

54à, Devonskaya str., 452620, Oktyabrsky City, Bashkortostan Republic, Russian Federation,

tel.: (347) 676-64-04,

e-mail: info@of.ugntu.ru

 

It is demonstrated that generally reservoir-rocks are characterized by a wide range of wetting rate. Hydrophilic and hydrophobic sections of pore channel surface have a mosaic distribution. For quantitative characteristics of productive reservoir hydrophilic rate the author suggests to use an efficient film thickness of residual water on the pore channel surface. If the productive reservoir hydrophobic rate increases the medium thickness of the residual water film on pore channel surface decreases and vice versa, the film thickness increases directly with the increase of hydrophilic rate. The efficient thickness of residual water film and hydrophilic property can be determined by using formation characteristic of productive reservoirs. There have been determined some formulas to estimate residual water film thickness by using productive reservoir characteristics and three-dimensional residual water saturation of the reservoir. Wettability index forecast method based on the electric methods of wells research is proposed.

 

Key words: wettabillity; specific surface; residual water; reservoir properties; hydrophilic property forecast; geophysical methods of well research.

 

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UDC 552.578:532.6(571.1)

 

EFFECT OF CAPILLARY FORCES ON WATER AND OIL DISTRIBUTION

IN NATURAL TRAPS OF KOGALYM FIELD (ð. 25)

 

Bolshakov Yuly Yakovlevich,

Batyrov Yury Vladimirovich

 

Tyumen State Oil and Gas University

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

e-mail: bolshakov30@yandex.ru

 

Within the boundaries of a big Kogalymsky field there identified 54 oil deposits. The structure of many deposits gives evidence of presence of significant deviations from the principals of the prevailing anticlinal-gravitational concept of oil and gas accumulation. Basically, they are observed in oil water contact (OWC) inclined position and screening of oil accumulations along the lateral by aquifer sandy rocks. The study of the capillary reservoir-rocks characteristics proves the fact that these variations occur due to the screening of oil deposits by capillary barriers arising at the water-oil contacts in porous medium at the joints of different porous facies.

 

Key words: oil; deposit; water; capillary pressure; collector; capillary barrier; hydrophilic rock.

 

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UDC 662.276.1/.4

 

EFFICIENCY ENHANCEMENT OF A FIELD DEVELOPMENT

WITH VERY COMPLEX GEOLOGICAL STRUCTURE (ð. 30)

 

Sokolov Vadim Sergeevich

 

Tyumen State Oil and Gas University

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

e-mail: Sokolov.76@bk.ru

 

Epifantsev Alexander Sergeevich

 

CJSC "TyumenNIIproject"

11, bld. 1, office 303, Montazhnikov str., 625046, Tyumen, Russian Federation,

tel.: (345) 259-39-54,

å-mail: Epifancevas@tniip.ru

 

Currently, in the Volgograd region, due to the high rate of oil extraction from a great number of oil fields, the objects with very complex geological structure are being put into development. So, as far as such objects are concerned, it is impossible to achieve high extraction indicators applying traditional methods. On the example of Kudinovskoe field there are shown the ways how to increase the efficiency of such objects development.

 

Key words: efficiency of development; water-flooding; formation hydraulic fracturing; gas factor; complex geological structure; Kudinovskoe field.

 

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UDC 622.276.1/.4.04(262.81)

 

ASSESSMENT OF ENGINEERING-GEOLOGICAL HAZARDS

WHEN DEVELOPING THE CASPIAN SEA OFFSHORE FIELDS (ð. 35)

 

Mashtakov Alexander Sergeevich

 

"VolgogradNIPImorneft", branch of LLC "LUKOIL–Engineering" in Volgograd

96, Lenin prosp., 400078, Volgograd, Russian Federation,

e-mail: Amashtakov@lukoilvmn.ru

 

The necessity of taking into account the geological risks (impact of shallow free gas on the subgrade, effect of dynamic loads on the facilities, leading to a decrease of physical and mechanical properties of the soil) in order to improve the safe operation of oilplatforms is substantiated.

 

Key words: engineering-geological aspects; dynamic loads; shallow free gas; the Caspian Sea; oil platforms; jack-up rigs.

 

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UDC 622.276.1/.4

 

CLAY DISTRIBUTION NATURE IN PERMEABILITY-DIFFERENT SAND

COLLECTORS AND ITS IMPACT ON THE RESERVOIR CHARACTERISTICS

AND LIQUID INFLOW TOWARDS WELL-BOTTOMS

IN VAKHITOV FIELD (ð. 42)

 

Eliseev A.N., Urusov S.A.

 

PJSC "Orenburgneft"

 

Lepikhin V.A.

 

LLC "SamaraNIPIneft"

 

Makhmutov A.A., Tupitsyn A.M.

 

NPO "Neftegaztechnologia, Ltd."

96/2, Revolutsionnaya str., 450078, Ufa, Republic of Bashkortostan, Russian Federation,

tel.: (347) 228-18-75,

å-mail: npo@ngt.ru

 

This article examines the impact of shale on the change the reservoir filtration characteristics on the example of Dkt1 productive formation of Vakhitovsky field. It is shown that for wells with highly-permeable gravelite inter-layers the reservoir properties fall is insignificant regardless of the clay content. The maximum allowable value of clay ratio Kgl., making 10 %, is identified. If the clay ratio is higher, then in the inter-layers containing no gravelite rocks, there occurs swelling of clays when injecting fresh water. Different areas, subject to the clay coefficient effect on reservoir properties change are identified in the combined map of the maximum permeability and the average coefficient of clay.

 

Key words: gravelite rocks; clay factor; productive formation; reservoir haracteristics.

 

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UDC 622.276.1

 

POSSIBILITY OF EARLY DIAGNOSIS OF A RESERVOIR - WELL CHANGES

IN FIELD CONDITIONS (ð. 46)

 

Salavatov T.Sh., Abbasova S.V., Mansurova S.I., Habibullaeva Sh.A.

 

Azerbaijan State Oil Academy (ASOA)

20, Azadlyg prosp., AZ1019, Baku, Republic of Azerbaijan

 

Mustafayev K.I.

 

OGGP and C RI

 

Salavatova R.Sh.

 

NIPI "Neftegasproject"

 

Some new approach to the timely diagnosis of changes in a reservoir – well system is proposed. Based on the analysis of the pressure dynamics change at the wellhead it is shown that it is possible to pre-determine the process of sand occurrence.

 

Key words: well; occurrence of sand; spectrum analysis of distribution; enthropy.

 

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UDC 552.578.2.061.3

 

A HYPOTHESIS OF OIL AND GAS FIELDS GENERATION

ON THE SIBERIAN PLATFORM (ð. 50)

 

Ogonyan Alexander Alexeevich,

Suturin Anton Sergeevich,

Kushnikov Alexander Mikhailovich

 

CJSC "Dulisma Oil Company"

279, office A800, Baikalskaya str., 664050, Irkutsk, Russian Federation,

tel.: (395) 228-87-40,

e-mail: aleksandr_og@mail.ru, asuturin@inbox.ru, aleks_kysh@mail.ru

 

The article discusses the hypothesis of oil and gas fields’ generation on the Siberian platform. It is concluded that generation and migration of hydrocarbon compounds from organogenic dolomites of Ust-Kutskian horizon took place in the course of their thermal heating by sills and that the age of oil and gas fields is not older than the age of the Siberian trap formation.

 

Key words: Dulisminskoe oil-gas-condensate field; Ust-Kutskian horizon; oil and gas formation; trap magmatism.

 

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