Geology, Geophysics and Development of Oil and Gas Fields

The purpose of the original research is faults’ influence on the existence of hydrocarbon accumulations and filling of traps intersected by faults. An analysis is performed for the area in the south-east of Perm region, where a lot of regional faults are identified, based on the seismic survey and well logging data. To solve the problem, a database of local uplifts, studied by deep drilling, has been developed. The above-said database allows to carry out statistical analysis of the objects by some parameters or groups of parameters.

Based on the results of the analysis, the faults influence on deposits formation and conservation in the traps of productive formations and their capability to be the reason for hydrocarbons (HC) disintegration is revealed. According to the data obtained, the main factor that pays effect on HC reserves conservation, accumulated in the near-fault structures, is characteristics of rocks being in contact on the fault plane (reservoir-reservoir, reservoir-cover). Some specific features of filling of Early Carboniferous traps that depends on the vertical amplitude of a strike-slip fault, are determined. For traps of Upper Devonian-Tournaisian hydrocarbon complex such correlation is not found out. That could be caused by the low portion of the reservoir in the formation’s total thickness and, consequently, by the low chance of reservoir-reservoir contact.

Keywords: traps filling; faults; oil and gas potential forecast; displacement amplitude.

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UDC 553.981/.982.041(1/9)

THE EXPERIENCE OF BASIN MODELING 2D TECHNOLOGY IMPLEMENTATION

WITHIN THE URALS FOLD-THRUST AREA (p. 11)

Zinchenko Ivan Andreevich

JSC "Lower-Volga Research Institute of Geology and Geophysics" (JSC "NVNIIGG")

70, Moskovskaya str., 410012, Saratov, Russian Federation,

tel.: (8452) 74-92-98,

e-mail: zinchenkoia91@gmail.com

The article presents a characteristic of the basin modeling technology implementation in the regions of complex tectonic structure. It shows the pattern of a structural model construction based on the method of balanced cross-sections. Key stages of the region's geological history which had a major impact on the oil and gas potential are highlighted. The prospects of oil and gas potential in complex tectonic conditions of the folded Pre-Urals are estimated on the basis of a basin modeling.

Keywords: hydrocarbon raw material; basin modeling; thrusting dislocations; directions of exploration work; oil and gas; generation of hydrocarbons.

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UDC 622.276.031.011.433:532.5

DEFINITION OF PETRO-PHYSICAL CHARACTERISTICS

OF GEOLOGICALLY HETEROGENEOUS FORMATIONS (p. 18)

Rzayev Ab.G., Abdurakhmanova A.M.

Institute of Control Systems, NASA

9, B.Vakhabzade str., AZ1141, Baku, Republic of Azerbaijan,

tel.: (+99450) 395-40-08,

е-mail: abbas_r@mail.ru

Rasulov S.R., Orudzhev V.V.

Azerbaijan State Oil and Industry University

34, Azadlyg prosp., AZ1010, Baku, Republic of Azerbaijan,

tel.: (+99450) 212-08-35,

е-mail: rasulovsakit@gmail.com

The article considers some specific features of formations’ permeability and porosity determination in conditions of their heterogeneity and connectivity. The problem is solved by various variants. Adequate mathematical models to determine the petro-physical characteristics of geologically heterogeneous formations are proposed. It is shown that relative error of determination of hydrodynamical filtration characteristics changes in the allowed limits.

Keywords: permeability; porosity; geological heterogeneity; connectivity; mathematical model.

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UDC 551.7.022:550.832.4

INTEGRATED FORECAST OF FACIES OF TOURNAISIAN CARBONATE DEPOSITS

IN THE FIELDS OF VERKHNEKAMSK DEPRESSION, BEING DEVELOPED,

BASED ON 3D SEISMIC SURVEY DATA (p. 21)

Putilov Ivan Sergeevich,

Ladeyshchikov Sergey Viktorovich,

Vinokurova Ekaterina Evgenievna

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

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

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

e-mail: Ivan.Putilov@pnn.lukoil.com, Sergei.Ladeyshikov@pnn.lukoil.com

The article discusses the ways of facies zoning of Tournaisian carbonate deposits according to the data of core litho-facies analysis, well logging and 3D seismic survey. The approaches to facies complex prediction, based on the method of multivariate collectors prediction, are proposed.

Keywords: oil field; 3D seismic survey; core litho-facies analysis; facies complexes; effective thickness; seismic attributes; multivariate prediction of collectors.

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UDC 622.276

SOME SPECIFIC FEATURES OF OIL DEPOSITS DEVELOPMENT,

COMPLICATED BY TECTONIC FAULTS (p. 25)

Salimov Farid Sagitovich

LLC "LUKOIL–Western Siberia", Territorial Production Company (TPC) "Povhneftegaz"

40, Shirokaya str., 628482, Kogalym, Tyumen region, Khanty-Mansi autonomous territory – Yugra, Russian Federation,

e-mail: Farid.Salimov@lukoil.com

Kotenyev Yury Alexeevich,
Sultanov Shamil Khanifovich,

Zeigman Yury Veniaminovich,

Lysenkov Aleksey Vladimirovich

Federal State Budget Educational Institution of Higher Education "Ufa State Petroleum Technological University"

1, Kosmonavtov str., 450062, Ufa, Bashkortostan Republic, Russian Federation,

tel.: (347) 241-61-92, 228-24-11, 242-09-39,

e-mail: geokot@inbox.ru, ssultanov@mail.ru, jvzeigman@ya.ru

Mukhametshin Vyacheslav Sharifullovich

Federal State Budget Educational Institution of Higher Education "Ufa State Petroleum Technological University", a branch in the city of Oktyabrsk

54a, Devonskaya str., 452607, Oktyabrsk-city, Bashkortostan Republic, Russian Federation,

e-mail: vsh@of.ugntu.ru

Areas of fracture-increased zones distribution, caused by tectonic faults and assigned to block noses and depressions of a consolidated foundation roof, were first identified in Pohovsky field by means of seismic-dynamic analysis of the wave field. The results of production wells operation were compared with their location relative to the detected areas of fracturing, the analysis of which showed the regularity of two-times wells productivity increase when nearing the areas. At the distance of more than 500 m from the tectonic faults the fluid inflow rates significantly decrease and a formation hydraulic fracturing provides only short-term effect. The deterioration of A reservoir characteristics worthening is caused by a decrease of rock-reservoirs permeability because of fractures proportion decrease and porous space predominance. Producing wells operation confirms the assumption of oil movement along sub-vertical destruction zones and of YuV₁ formation feeding. Based on the results obtained, prospective deposits on the structure edges, to be used for production wells drilling, are identified in the zones of increased fracturing. Drilling of the second sidetracks from wells that are in the idle fund, was proposed. Thus, the detailed study of tectonic structure of the foundation surface and Jurassic sediments allows identifying complicatedly-built, small-sized geological objects prospective for detection of small oil deposits, for specification of exploration wells location, for starting the search of deposits in sub-vertical destruction zones and the foundation rocks in the territories with already detected overlying oil deposits. The identified zones of increased fracturing, including associated with horizontal shear zones allow to detect the prospective zones of increased permeability which should be located close to faults originating in the foundation.

Keywords: tectonic faulting of oil deposits; fracturing; productivity; fluid influx.

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UDC 549.08; 549:62; 622.276.5:550.064.45

TECHNOGENIC LITHOGENESIS AND MINERALOGICAL STRUCTURE

OF THE BENCHMARK PRECIPITATION IN INTERCOLUMN SPACE

OF OIL WELLS (p. 32)

Olkhovskaya V.A., Peskov A.V., Konovalov V.V.

Samara State Technical University

244, Molodogvardeiskaya str., 443100, Samara, Russian Federation,

e-mail: valeriaolh@mail.ru

Salt sediment in intercolumn space of oil wells of one of the major multilayer fields on the territory of the Samara region (Russia) is considered as product of technogenic lithogenesis, possessing, by analogy to natural connections, typomorphic signs. By methods of scanning electronic microscopy, X-ray diffractometric and energy dispersive microanalysis, the structure is studied, concentration of chemical elements and mineralogical structure of sediment are defined. It is proved that information about the lithific sediment (benchmarks) in intercolumn space of wells is useful for defining watering sources, diagnosing through-defects of casing and pump-compressor pipes, a leakage of connecting knots and behind-casing flows. The results of researches are confirmed by the data of trade observation.

Keywords: well; scales; energy dispersive analysis; X-ray diffractometric method; typo-morphism; mineralogical structure; watering source.

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UDC 622.276

INTERPRETATION OF CAPILLARY PRESSURE CURVES

IN CASE OF MIXED-WETTABILITY (p. 40)

Akhmetov Rasul Tukhbatullovich,

Mukhametshin Vyacheslav Vyacheslavovich,

Andreev Anton Vadimovich

Ufa State Petroleum Technological University, a branch in the city of Oktyabrsk

54a, Devonskaya str., 452607, Oktyabrsk-city, Republic of Bashkortostan, Russian Federation,

tel.: (34767) 6-55-90, 6-64-04,

e-mail: vsh@of.ugntu.ru

The influence of the wettability nature of the pore channels surface on the capillary pressure curves is considered. The wettability distribution in the hollow space of the productive formations is substantiated. It is shown that under mixed wettability the pore surface is hydrophobic and inter-porous contractions surfaces – hydrophilic.

Keywords: capillary pressure; water saturation; mixed wettability; oil saturated reservoir formation.

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UDC 622.276.63

CRITICAL CRITERIA OF ACID TREATMENTS USE

IN INJECTION WELLS’ BOTTOM AREAS IN CARBONATE

AND TERRIGENOUS RESERVOIRS (p. 44)

Sergeeva Lidiya Grigorievna

Ufa State Petroleum Technical University

1, Kosmonavtov str., 450062, Ufa, Republic of Bashkortostan, Russian Federation,

e-mail: sergeevalidija@ya.ru

Sergeev Vitaly Vyacheslavovich,

Kinzyabaev Fanis Suleimanovich

LLC "VI-ENERGY", Skolkovo Foundation

1, Malevich str., Skolkovo Innovation Centre, 143026, Moscow, Russian Federation,

e-mail: vsmyn23@gmail.com, k.fanis@bk.ru

The injection wells are one of the main important elements in the system of oil and gas fields development, which links surface system of communication with productive formations. During operation of oil and gas fields there happens permeability decrease of bottom-hole formations zones BHZ of production and injection wells. Particularly, in conditions of insufficient qualitative preparation of the water, injected into the formation, significant quantity of contaminants goes to BHZ of injection wells like silty and clay particles (open drain and communal waste water – up to 25 %), residual oil (when injecting produced water). To remove the contaminants, to clean and to recover BHZ permeability, various physicochemical methods of BHZ treatments are applied. The most commonly applied method is acid treatment of injection wells’ BHZ by different acid compositions. The article presents recommendations on acid compositions use to treat BHZ of injection wells as well as gives the main critical criteria, necessary to be taken into account when selecting wells-candidates to be subjected to acid treatment of bottom-hole formations zones of injection wells in carbonate and terrigenous formations.

Keywords: injection well; bottom-hole formation zone treatment; physicochemical methods; acid treatment; hydrochloric acid; hydrofluoric acid.

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UDC 662.276.1/.4:55

EXPRESS-METHOD OF LOCAL STRUCTURES IDENTIFICATION

ON A GEOLOGICAL SECTION FOR PLANNING GEOLOGICAL

AND TECHNICAL MEASURES (p. 48)

Nurgaliev R.Z.

Almetyevsk State Petroleum Institute

2, Lenin str., 423450, Almetyevsk, Republic of Tatarstan, Russian Federation,

tel.: (855) 331-00-24,

e-mail: alni@rambler.ru

Safiullin I.R., Gallyamov R.I.

LLC NPO "Neftegaztekhnologia"

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

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

e-mail: npo@ngt.ru

The article discusses the method of identification of the local geological structure transformed to the state of a volumetric body, based on the use of sections’ contour lines. Each contour line is drawn in four directions. By recognizing the images by the wavelet decomposition method application, the priority direction of the structure change and the volumetric body type are determined. Priority directions of the structure change allow to obtain volumetric images, which are then used to select geological and technical measures to enhance oil recovery.

Keywords: geological structure; formation; images processing method; wavelet decomposition; geological and technical measures.

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UDC 622.279.5

TECHNOLOGICAL APPROACHES TO DEVELOPMENT

OF SHALE GAS RESOURCES (p. 51)

Qiu Ping,

Yakushev Vladimir Stanislavovich

Gubkin Russian State Oil and Gas University

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

tel.: (499) 507-85-68,

e-mail: yakushev.v@gubkin.ru

At present, one of the most urgent problems of the world gas industry is development of shale gas resources. Shale thicknesses differ from conventional reservoirs by many parameters, and by ultra-low permeability in the first turn. Peculiarities of shale gas production are short lifetime of a production well and long lifetime of a shale formation development. Due to these reasons, successful shale gas production out of a low-permeable shale formation requires application of a wide range of technologies. The article develops the unified generalized system classification of different technologies applied, when producing shale gas, as well as analyzes some specific features and objects of definite technologies application of horizontal drilling and a formation hydraulic fracturing (FHF), including few new, innovative ones (for conducting FHF) that were lately developed. The article also considers the prospects and limitations for application of the technologies of fractures distribution monitoring when conducting a formation hydraulic fracturing are discussed.

Keywords: shale gas; gas production technologies classification; horizontal drilling; a formation hydraulic fracturing; fractures development monitoring.

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

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