|
ISSN 0207-2351 Scientific-technical journal published since 1965 June 2016 ¹ 6 12 issues per year
CONTENÒS |
|
|
|
DEVELOPMENT OF OIL AND GAS-OIL FIELDS |
|
|
|
|
|
|
|
|
|
|
|
METHODS OF PRODUCING EFFECT ON A DEPOSIT AND RAISING OIL RECOVERY |
|
|
|
|
|
|
|
|
|
RESEARCH OF FORMATIONS AND WELLS |
|
|
|
|
|
|
|
PREVENTION OF PARAFFIN SEDIMENTATION, SALTS AND HIDRATES |
|
|
|
|
|
Nelyubov D.V., Shabarov A.B., Vazhenin D.A. Multi-functional reagent for oil pipeline transportation (p. 56-61) |
|
|
|
Information on the articles (p. 62-68) |
|
|
|
Information on the articles |
|
|
|
THE STRUCTURE OF RESIDUAL OIL AND GAS RESERVES IN DEPLETED FIELDS (ð. 5)
A.V. Akhmetzyanov, E.A. Mamedov, A.M. Salnikov
V.A. Trapeznikov IPU RAS 65, Profsoyuznaya str., 117806, Moscow, Russian Federation, tel.: (495) 334-89-10, fax: (495) 334-93-40, e-mail: eamamedoff@gmail.com
Today, the problem of ensuring completeness of natural hydrocarbons extraction from subsurface assets belongs to one of the most pressing problems of the oil industry of our country. Potential volumes of oil and gas production are characterized by a complication of conditions of fields’ development, the determining factor of which is a significant worsening of the reserves structure and increasing of hard-to recover reserves portion. This is caused by the entry of a large number of high-yield deposits into the latest stage of their development, characterized by intensive production decline, a sharp increase in water cut and unfavorable qualitative characteristics of the oil reserves of the deposits newly put into development. The paper matches the problem of the methods’ development applied for hydrocarbon residual reserves extraction with the problem of scientific substantiation and development of new effective methods of increasing oil and gas-condensate recovery of formations with hard-to-recover reserves with hard.
Key words: residual reserves; depleted fields; additional oil production.
|
|
|
|
UDC 622.276.031:532.11+622.276.346
IMPACT OF FORMATION DAMAGE EFFECTS ON NON-MONOTONIC DEPENDENCE OF A WELL FLOW-RATE ON DEPRESSION (ð. 7)
M.V. Zaitsev
Oil and Gas Research Institute Russian Academy of Sciences (OGRI RAS) 3, Gubkin str., 119333, Moscow, Russian Federation, e-mail: folko200@mail.ru
N.N. Mikhailov
Gubkin Russian State University of Oil and Gas 65, Leninsky ðrosp., 119991, Moscow, Russian Federation
Existing concepts and theories about non-monotonic dependences of wells productivity on depression are considered. Some new models of accounting of formation damage mechanisms in the near-wellbore zone are proposed; the analysis of their influence on indicator diagrams is conducted. Extreme point presence on the indicator diagrams in case of complex impact of formation damage effects is proved. Crescent dependences of productivity on depression are theoretically derived and also ratios for critical productivity determination are fixed.
Key words: permeability; indicator diagrams; near-wellbore zone; formation damage; wells productivity.
|
|
|
|
PRINCIPLES OF PERFECTION OF REEF DEPOSITS DEVELOPMENT BY WATER-FLOODING (ON THE EXAMPLE OF TIMEROVSKY DEPOSIT OF "TatRITEKneft", TERRITORIAL BRANCH OF JSC "RITEK") (ð. 13)
Vadim Valerianovich Zemlyansky, Konstantin Alexandrovich Ratanov
JSC "RITEK" 3, Bolshaya Ordynka str., 115035, Moscow, Russian Federation, e-mail: vzemlyanskiy@ritek.ru, kratanov@ritek.ru
The article is devoted to a topical theme – the perfection of the reef deposits development using water-flooding. The authors analyzed the development of Tournasian-Famennian deposits of Timerovsky complex of the Republic of Tatarstan. The factors affecting the wells production water-flooding as well as the positive aspects of the organization of the reservoir pressure maintenance (RPM) system and its further strengthening are revealed. Synergistic effects of the activities undertaken at the operational fund of wells, including injection of the agent of exposure are identified. Some further steps to improve the formation stimulation system for more complete extraction of hydrocarbons from the subsurface assets are proposed. The authors of the paper make conclusions about the conceptual approach to the selection and (or) to optimization of similar reservoir development.
Key words: system of development; water-flooding; high ruggedness; carbonate reservoir.
|
|
|
|
APPLICATION OF NON-STATIONARY WATER-FLOODING IN CONDITIONALLY-UNIFORM PERMEABLE RESERVOIR WITH HIGH-VISCOUS OIL (ð. 18)
I.V. Vladimirov, E.M. Almukhametova, R.R. Varisova
Ufa State Oil Technical University 1, Kosmonavtov str., 450062, Ufa, Republic of Bashkortostan, Russian Federation, e-mail: igorv@ufamail.ru, elikaza@mail.ru
Despite the vast experience of using the technologies of non-stationary water-flooding (NSWF) in the oil fields of the former USSR, only few examples of cyclic water injection into high-viscous oil deposits can be remembered. However, the available information about the results of non-stationary water flooding application in the deposits of allows considering the technology to be quite effective. Dynamics of the technological effect of non-stationary water-flooding application show decreasing of its effectiveness in time, thus requiring the technology’s constant modification. That is why studying the conditions of effective application of non-stationary water-flooding technology in high-viscous oil deposits is a topical problem. The article describes the conditions of non-stationary water-flooding application in permeably conventionally-uniform reservoir.
Key words: non-stationary water-flooding; high-viscous oil; cyclic stimulation; oil recovery factor; water-flooding.
|
|
|
|
UDC 622.276.1/.4(470.5)+622.276.66
SOME EXPERIENCE OF THE FORMATION PROPPANT FRACTURINE IN CARBONATE RESERVOIRS OF PERM REGION DEPOSITS (ð. 23)
Sergey Anatolievich Kondratyev, Alexey Anatolievich Zhukovsky, Tatiana Sergeevna Kochneva, Valeriya Leonidovna Malysheva
"PermNIPIneft", branch of LLC "LUKOIL−Engineering" in the city of Perm 29, Sovetskaya Armiya str., 614066, Perm, Russian Federation, tel.: (342) 233-64-31, e-mail: Sergej.Kondratiev@pnn.lukoil.com, Aleksej.Zhukovskij@pnn.lukoil.com
The article analyzes the experience of wells stimulation in terms of modification of the technology of a formation hydraulic fracturing in carbonate reservoirs with account of technical and geological factors for wells with comparable technological conditions. The results of the analysis allowed making conclusions about the effectiveness of conducting proppant hydraulic fracturing in carbonate reservoirs.
Key words: hydraulic fracturing of a formation (HFF); acid hydraulic fracturing of a formation (AHFF); proppant hydraulic fracturing of a formation; carbonate reservoir.
|
|
|
|
THE INFLUENCE OF BRITTLENESS AND DUCTULITY OF SHALE FORMATIONS ON THE EFFICIENCY OF HYDRAULIC FRACTURING (ð. 26)
Alexander Alexandrovich Repnik Vitaliy Anatolevich Bochkarev
LUKOIL International Upstream West e-mail: Vitaliy.Bochkarev@lukoil-overseas.com
Oil- and gas-saturated clay-carbonate pays of Eagle-Ford formation are simultaneously hydrocarbon source rocks, reservoir and cap rocks. Shale formations have a significant quartz (silicate) or the carbonate component, that make them more brittle and as a result subject to fracturing. Syngenetic organic matter (OM) is the source of hydrocarbons. Kerogen structure affects the elastic and mechanical properties of the reservoir. Oil and gas accumulations in clay-carbonate formations are formed in the closed thermodynamic systems, the movement of the front edge of the hydrocarbon reservoir, as shown above, has its own (internal) causes of movement. Reservoir volume increase in such a system occurs due to appearance of new fractures and growth of already available ones in deadlocks zones of fluid fractures, where there happens increase of the non-anticline (catagenetic) oil deposit. After assessing lithogenesis of formations it can be possible to predict the more brittle and more ductile areas. The exact determination of brittle rocks’ area is important for effective implementation of hydraulic fracturing. Brittleness depends on the component composition of the rock, temperature and pressure. Correction factor is proposed to be introduced for the reliable assessment of this parameter. Based on the proposed dependence, the diagram that allows assessing the physical component of the rock components’ composition is applied. The main way of shale formations develop is hydraulic fracturing of a formation, namely, creation of additional artificial (secondary, technogenic) fractures in brittle and compacted rocks to provide effective movement of the fluid to the wellbore. In this context, knowledge about brittleness and ductility of rocks allows estimating the degree of the required impact on the formation and defining the amount of water and proppant necessary for hydraulic fracturing as well as areas inefficient for conducting of fracturing. Showings of brittleness and ductility of shale formations can be used for qualitative-quantitative prediction of fractures’ spatial position and stresses’ anisotropy as well as estimation of water and proppant demand needed after conducting of a formation hydraulic fracturing. When developing productive intervals of shale deposits it is proposed to apply the cyclic method with repeated hydraulic fracturing of a formation tested and approved when used in vertical well of the Eagle Ford formation that extends the life-time of a well operation and, consequently, maintaining the high level of production without drilling new producing wells.
Key words: shale deposits; lithogenesis; source stratum; reservoir; catagenesis; brittleness; ductility; hydraulic fracturing of a formation; development.
|
|
|
|
DIRECTED MULTI-STAGE HYDRAULIC FRACTURING OF A FORMATION. FLOW OF VISCOUS PROCESS FLUID THROUGH PERFORATION OPENINGS AND CHANNELS OF NON-CIRCULAR SHAPE. PART 1. SUBSTANTIATION AND RESEARCH OBJECTIVES (ð. 36)
V.G. Griguletsky
Gubkin Russian State University of Oil and Gas 65, Leninsky ðrosp., 119991, Moscow, Russian Federation, e-mail: gvg-tnc@mail.ru
The results of laboratory and field tests show that hydraulic fracturing of a formation (HFF) conducted with injection of large volumes of sand brings abrasive destruction of perforation openings. After pumping of a large amount of sand through perforation openings in the casing (operational) string they have not the standard circular shape but "torn" rectangular-elliptical one. This situation requires clarification of the problem related to the flow of viscous process fluid during a formation hydraulic fracturing. In particular, it requires specification of the basic boundary (marginal) conditions of the problem, taking into account the non-circular shape of the perforation openings and channels.
Key words: hydraulic fracturing of a formation; perforation openings; amounts of sand.
|
|
|
|
ANALYSIS OF REASONS FOR CHANGES OF OIL COMPONENT COMPOSITION WHEN OPERATING OIL FIELDS IN SAMARA REGION (ð. 45)
E.S. Kalinin, P.V. Pavlov
LLC "SamaraNIPIneft" 18, Vilonovsky str., 443010, Samara, Russian Federation, å-mail: KirjanovaEV@samnipineft.ru
I.A. Struchkov, P.V. Roschin
National Mineral Resources University ("Mining") 2, 21st liniya, Vasilevskiy ostrov, 199106, St.-Petersburg, Russian Federation
A.E. Manasyan
JSC "Samaraneftegaz" 50, Volzhsky prosp., 443071, Samara, Oktyabrsky region, Russian Federation, tel.: (846) 333-02-32, å-mail: sng@samng.ru
The authors studied the dynamics of change of component composition and physical-chemical properties of the movable component of formation oil when developing productive formations of Samara region oil deposits. The data obtained from B2, D3br and A4 sites of oil fields was subjected to generalization as of 01.01.2011. Component composition of mobile and gas factors were calculated. A comparison of these indicators with oil original characteristic proved the fact of its properties change in the main productive formations, which was manifested by the reduction of the saturation pressure and gas content as well as by increase of the density and viscosity. An alternative method of monitoring the development of oil fields in Samara region, which allows quick identification of the most effective technologies affecting productive horizons in order to increase oil recovery and timely correcting the technological design documents with account of reservoirs’ geological-physical characteristics is proposed.
Key words: component composition of oil; technogenic effect; physical-chemical properties of oil; optical inspection methods; chromatography.
|
|
|
|
STATISTICAL SUBSTANTIATION OF ANALOGS IN CASE OF PROBABILISTIC ESTIMATION OF DENSITY OF INITIAL TOTAL OIL RESERVES (VISEAN TERRIGENOUS OIL AND GAS COMPLEX IN PERM REGION IS TAKEN AS AN EXAMPLE) (ð. 48)
O.A. Melkishev
Perm National Research Polytechnic University 29, Komsomolsky prosp., 614990, Perm, Russian Federation, tel./fax: (342) 219-83-67, e-mail: gng@pstu.ru
This article focuses on development and implementation of the methodology of statistical analogues selection when conducting probabilistic assessment of density of initial total oil potential of Visean terrigenous oil and gas complex (P90, P50, P10) in the territory of Perm region by means of analyzing vario-grams applying geological-chemical, structural-capacitive and migration-accumulative criteria of oil and gas content.
Key words: analogue; resources; probabilistic estimation; variogram; probabilistic criteria of petroleum potential.
|
|
|
|
RHEOLOGICAL STUDY AS AN INSTRUMENT OF PREVENTING COMPLICATIONS IN TECHNOLOGICAL PROCESSES OF OIL PRODUCTION (ð. 52)
Irina Alexeevna Guskova, Dilyara Mahsumzyanovna Gumerova, Dinara Rafaelevna Khayarova, Lenar Kamilevich Shaydullin
Almetyevsk State Oil Institute 2, Lenin str., 423450, Almetyevsk, Republic of Tatarstan, Russian Federation, e-mail: guskovaagni1@rambler.ru, gumerova.dilyara2011@yandex.ru, gildinara14@mail.ru, lenar-shaydullin@mail.ru
Operation of oil producing wells at the latest stage of development is associated with a number of engineering and technologic problems. The researches conducted to estimate the effect of the applied technologies on the produced hydrocarbons properties is currently very important. The paper presents the results of the researches conducted to determine the temperature influence on change of structural-mechanical characteristics of water-oil emulsions of wells drilled in the Bashkirian stage of Arkhangelsk field. It is revealed that irrespective of the shear rate viscosity of the studied samples after heat treatment and subsequent cooling increases thus proving significant influence on rod strings’ hydrodynamic friction when using sucker-rod submersible pumping unit. Hydrodynamic friction has most remarkably increased when heated up to the temperature of 80 °Ñ with subsequent cooling to 20 °Ñ. It is shown that to prevent the heating negative effect followed by oil cooling on occurrence of complications the required condition of implementation of the technologies that envisage thermal impact is determination of the optimal temperature during the technological process.
Key words: field oil sampling; rheological characteristics; thixotropic properties; system approach; interrelation of technologies.
|
|
|
|
MULTI-FUNCTIONAL REAGENT FOR OIL PIPELINE TRANSPORTATION (ð. 56)
D.V. Nelyubov, A.B. Shabarov, D.A. Vazhenin
Tyumen State University 15a, Perekopskaya str., 625003, Tyumen, Russian Federation, e-mail: nelyubov_dv@mail.ru
The paper describes the processes of development and laboratory testing of an oilfield reagent. The reagent to be developed should have the properties of oil viscosity regulator and inhibitor of formation of asphalt-resin-paraffin oil sediments due to the work of nonionic surfactants, the composition of which is optimized for synergetic increase of their efficiency by inductive dielectric method. The reagent’s composition is ternary and includes a dispersant of asphaltene associations. The declared activity of the reagent is proved by laboratory testing results conducted by LLC "RN–UfaNIPIneft" and recommended for field testing in Ust-Tegussky field of LLC "RN–Uvatneftegaz". Application of TNHS-15,0 reagent allows 55 % decrease of oil viscosity under the temperatures characteristic for its transportation and 62 % asphalt-resin-paraffin sedimentation.
Key words: inhibitor of asphalt-resin-paraffin deposits; oil viscosity decreasing reagent; oil transportation; pipeline transport; surfactants.
|
|
|
|
JSC "ALL-RUSSIAN SCIENTIFIC-RESEARCH INSTITUTE OF ORGANIZATION, MANAGEMENT AND ECONOMICS OF OIL AND GAS INDUSTRY" |