bluuebunny/crossref_metadata_2025_split huggingface dataset:
Hydrochloric Acid Fracturing Combined with Water Shut-Off
Authors: Magadova L. A. , Silin M. A. , Gubanov V. B. , Marinenko V. N. , Magadov V. R , Gubkin I. M. , Demianenko N. A. 
Published: October 2008

Abstract
Institute of oilfield chemistry under Russian State University of oil and gas named after I.M. Gubkin in cooperation with BelNIPIneft, RUE «Production Association «Belorusneft» have developed the technology of formation hydrochloric acid hydraulic fracturing combined with water shut-off in producing wells, exposing carbonate reservoirs.
It is known that during interaction of hydrochloric acid solutions and oil, containing big quantity of tars and asphaltenes sludging and formation of emulsions colmataging porous space of reservoir take place.
In our work we have used the ability of generating such compounds when hydrochloric acid contacts hydrocarbon gel, composed using gelling complex "Khimeco-H" based on ferric salts of organic orthophosphoric ethers and stock (commercial) oil.
Hydrocarbon gels based on ferric salts of organic orthophosphoric ethers are obtained by dissoluting in hydrocarbon fluids gelling agent (mixture of alkylphosphoric ethers, mainly diakylphosphoric ethers) and activator based on ferrous compounds. As a result of interaction between gelling agent and activator we ontain ferric salts of organic orthophosphoric ethers which in their turn create associated complexes of molecular weight in hydrocarbons.
Principle of Iteration Composition of Sector Models for Full Field Reservoir Simulation
Authors: Kostuchenko S. V. , Bordzilovsky A. S. 
Published: October 2008

Abstract
The full field simulation of large reservoirs with number of cells more than 107 using majority of modem hydrodynamic simulators is hampered or even impossible. However, often such problem is topical.
For full field simulation of large reservoirs the authors offer decomposition of large models into a population of simple sector models. In each sector model conditionally independent simulation problems are formulated and solved. The consistency of an initial model is provided with matching of pressure fields and fluid flows on the boundaries of adjacent sector models for each time step of simulation. Authors offer to perform such conjugation by executing on special iterative algorithm realized in the form of the software.
The principle of iterative conjugation of sector models can be realized practically for anyone modern hydrodynamic simulator. This provides the new unique possibilities for simulation of large reservoirs, simulation on initial geological grids (without upscaling), paralleling and acceleration of simulation, usage different simulators for each sector model.
Study of Processes of Water Injection in a Reservoir on fall of Curves Pressure
Authors: Karnauhov Mihail L. , Piankova Elena M. , Gaponova Larisa M. 
Published: October 2008

Abstract
Field control and regulate of water flooding during field development essentially determine effectivity of oil production. The process of moving water front into reservoir may be recognized by analyzing fall off pressure curves (CFP) in the wells stopped after durable injecting or by registrating reaction of production wells on changing the regim of injecting during waterflooding, or due fixsate the time appearing injected water in the production wells.
Recodring CFP after shut in an injector well and analyzing the results may be used for determine parameters of formation as nearby of injector well, so in far zones directed from this well.
In the last years there are appeared many publications deal with process of water flooding where pointed out that there may be hydraulic fracturing of formation in nearby of injector. There are different opinions on this process: one consider that fractures are created like hydraulic fracturing made for intensification of production wells with creating only one fracture, having two wins; another consider that after during long time pumping with high pressure there may be created many fractures and than appeared high pearmeability zone near wellbore. But obvious, that both variants deal with improve rate of pumping in injector wells.
It well known and third opinion, that during pumping water in the injector well there may be created some fractures with complex configurations, which propogated from injector to production well. It like to electric discharge between two points with different charge. It's usually one argumented for one or another sheme of hydraulic fracturing with analyzing date of CFD. The CFD had interpretated made like interpretation CPD (S-type form pressure build-up curves). But any concrete configuration of CFD may be considered by different authors as one, second or third process.
The main task of this paper is studding process of injecting water in the wells for different variants intensifications wells, studding process of moving the front of water in the formation and determine the time when water reaches the production well, studding process of moving fluids (water with oil) in water flooding zone.
The analysis based on solutions of diffusion equation for a radial flow of filtration in the finite difference shape. There were simulated situations with pumping water in the well and than closed well for registration CFP and fixing transient process.
The configurations of curves (CFP), received with simulation, like the selected model of filtration. The analysis of real CFP, received in oilfield conditions, demonstrated that most of practical curves like on theoretical curves for reservoir with high permeabylity near wellbore zone (fractured zone). After durable pumping that zone may increasing it's space (more than 100 meters). We developed method of calculate characteristics of zones, surrounded of injector well. Some different oilfield examples considered in this paper.
Gas Utilizing Methods –A New Technology of Oil Recovery Factor Improvement
Authors: Karpov V. B. , Kokorev V. I. 
Published: October 2008

Abstract
Today, there is a clear tendency towards structure and quality deterioration of reserves. One of the reasons lies in low initial oil saturation (about 0.45-0.55 for the regions of Western Siberia). Average residual oil saturation is equal to some 0.3 (in this case displacement efficiency – 0.4). With displacement efficiency being that low, final oil recovery factor will be just over 25% even if the reservoir sweep factor can be increased to about 70%.
In the mid-XX century the method of oil field development using gas injection which theoretically allows 100% displacement was developed.
The paper discusses two technologies for implementation of gas methods used in oil field development. – alternating gas-water injection (AGWI) and water-gas stimulation (WGS) in which combined injection of displacement agents (gas and water) is used. It describes the principle of operation and features of special equipment developed on the basis of a multi-purpose booster compressor unit operating under the principle of a single-stage "compressor with hydraulic seal".
The paper presents procedures for realization of AGWI & WGS, as well as practical developments allowing to prevent typical problems which occur in the process of field equipment operation when pumping high pressure gas.
Actual results of WGS introduction in one of the JSC "RITEK" fields are presented and technological benefits of the process are assessed using 3D geologic-hydrodynamical simulation data.
Creation of technical/technological complex for bottom-hole monofuel solution based gas vapor stimulation for production of viscous and highly viscous oils
Authors: Kokorev V.I. , Maksutov R.A. , Orlov G.I. , Osipov A.V. 
Published: October 2008

Progressing development of viscous and highly viscous oil (VHO) deposits is becoming an issue of the day with the recovery of light oils.
Key feature of geological and physical properties of viscous and highly viscous oil is high flow reservoir resistance, which makes it difficult to employ traditional oil recovery method - hydrodynamical oil replacement.
Traditional development methods for VHO reservoirs are thermal methods, primary, steam injection.
The use of the above methods makes it possible to solve the most complicated development problem of these deposits, i.e. most of low-permeable reservoirs development using heating, thermal expansion of reservoir fluids and capillary inhibition.
At present the main source of thermal energy in the reservoir is known to be surface steam generation units. Transfer of thermal energy from the surface is associated with partial heat losses in land communications, mainly, in the well. This fact is one of the principal reasons which empede the use of steam injection into formations occurring in the depths of over 700m. Meanwhile, the analysis of VHO reserves located in the RF territory shows that major VHO reserves (86.1%) occur in the depths ranging 1000–1500 m (Fig.1)
Permanent Magnet Synchronous Motor (PMSM) – New Type of Drives for Submersible Oil Pumps
Authors: Pavlenko V. 
Published: October 2008

Abstract
Although the design and manufacturing technology of submersible rotary pump units (SRPU) are constantly improving, for the last few years no fundamental technological solutions for the drives of these units have been offered. Efficiency of submersible asynchronous electric motors which conditions both energy consumption and service life has virtually never been changed within many years. Today, it has become obvious that opportunities of further efficiency increase for standard electric motors of PED type (submersible) are virtually exhausted. During operation of SRPU in specific modes the resource of PED and the unit as a whole significantly decreases.
Peculiarities of Water Flooding the Naturally Fractured Reservoir
Authors: Volgin E. , Katz R. , Andriasov A. 
Published: October 2008

Abstract
Fractured oil reservoirs are divided into four groups. Type I reservoirs have little matrix porosity and permeability. Fractures provide both storage capacity and fluid-flow pathways. Type II reservoirs have low matrix porosity and permeability. Matrix provides some storage capacity and fractures provide the fluid-flow pathways. Type III (microporous) reservoirs have high matrix porosity and low matrix permeability. Matrix provides the storage capacity and fractures provide the fluid-flow pathways. Type IV (macroporous) reservoirs have high matrix porosity and permeability. Matrix provides both storage capacity and fluid-flow pathways, while fractures merely enhance permeability.
The Lower Silurian reservoir of the East Rogozin oilfield represents with naturally fractured, presumably oil wet, carbonate collector. The East Rogozin reservoir belong to Type III.
In order to study filtration in this reservoir, six numerical experiments were conducted on elements of development. There was studied pressure behavior in matrix and fracture network, examined a question about forecasting new well productivity, opprtunities on developing areas with sparse fracture system. Special attension is paid to the problem of waterflooding.
Construction Method of Horizontal Steam-Injection and Producing Oil Wells on the Test Sections OPU-4 and OPU-5 Yarega Heavy Oil Deposit
Authors: Denis Loparev 
Published: October 2008

Abstract
Report content:
Yarega deposit geological characteristic Special features of mine and surfacial heavy oil production Principal features of SAGD technology Performance specification for Yarega project development Drilling rig requirements Engineering calculations and technical decisions Drilling results Conclusions
Yarega deposit geological characteristic
Yarega deposit is situated in the south part of Timano-Pechora province in Ukhta region Komi Republik.
Oil-titanium deposit lies 200 m beneath the surface in upper and middle Devonian sandstones. This sandstone contains anomalous heavy oil.
Deposit involves 3 structures: Yaregskaya, Lyaelskaya, Vezgavozgskaya.
From 1939 Yarega deposit is in commercial development, heat-mining technology has been using since 1972.
Shallow depth occurrence (≈200m) and high density and viscosity of reservoir fluid is a special feature of Yarega deposit.
Reservoirs are low permeable with different grains, well clean-gap-graded, low clay, fine grained sandstones. Also fine grained sandstones with siltstone and clay.
Yarega oil is heavy, high viscosity, sulphide, with dry gas. Average density in bed conditions is 933 kg/m3, viscosity – 15300 mP x s (reservoir pressure 0,8 MPa, t=8 °C).
Enhancement of Underbalanced Drilling-in Technology Efficiency
Authors: Agzamov F. A. , Dijashev R. N. , Krysin N. J. 
Published: October 2008

Abstract
Drilling-in producing formations at negative pressure in borehole-formation system is one of the most perspective technologies, increasing efficiency of drilling. However effectiveness of operations frequently happens below expected. The purpose of work is to establish the reasons of this condition and development of recommendations on their removal. Technological process analysis of opening-up carbonaceous reservoirs with depression on the basis of actual materials on 66 wells has shown, that one of the reasons of producing possibilities reduction of wells is improper object selection for application of the given technology.
Other factors which can lead to efficiency reduction of drilling technology with depression are shown. One of them is formation mudding by fine-dispersed cuttings, which completely did not separate from a solution in mobile separator. Calculations and following field observations shown that cuttings particles remain in aerated oil weighted and do not remove from drilling mud while opening productive stratum process. Difficult particles precipitation from oil assisted highly viscous emulsion constitution from gas and water, dispersed in oils, and strengthen water-gas-oil emulsion by formation «armours» from fine-dyspersate cuttings at surfaces of water or gas particles.
Offers on configuration of drilling equipment and technology of open-up producer for formation mudding prevention are formulated and experimental works on wells are executed.
Title Research of Carbon Oil Quasi-Viscous Properties on Deposits of Volga-Ural Region of Russia
Authors: Dijashev R. N. , Zejgman J. V. , Rogachev M. K. 
Published: October 2008

Abstract
The report is devoted to the estimation of intensity of display of quasiviscous properties of oils of depositions of bottom and medial Carbon. By the studies held earlier it has been demonstrated, that at the increased maintenance in oils of asphaltic-resinous components and paraffins filtering of oils in formation takes place with deflections from Darcy linear law. A consequent of oil display quasi-viscous properties is a reason of formation zones of the depressed filtering or stagnant zones, decrease of completeness of oil displacement and increase of expenses at production activity.
According to the experiments results it is established:
– viscosity of oils with not destroyed spatial pattern is on the order and more exceed viscosity of the same oils with completely destroyed structure. Accordingly, mobility of oils in pore space in terrigene rocks due to structuring decreases at 2-17 times. – intensity of display of anomalies of oil viscosity and mobility in many respects depends on amount and gas-phase composition. Oil viscosity and mobility anomalies in terrigene rocks intensify with gas content increase. – oil with quasi-viscous properties by the character of capillary flow relate to pseudo-plastic liquids. Static pressure and gradients of pressure of shift are noted in oils with the increased maintenance of heavy paraffin hydrocarbons.
Quantitative estimations of rheological and filtration characteristics of reservoir and separated oils, which account will raise reliability of designing of development and field construction of deposits with non-Newton oils are given.
Application of Permanent Magnet Motors in Oil Production
Authors: Azanov Igor , Shamigulov Arthur 
Published: October 2008

Abstract
Asynchronous submersible electric motors are currently used most commonly to drive electrical submersible pumps. At the same time, the possibility of improving their performance has been practically exhausted, and the need to reduce power consumption presents specialists with the task of increasing the efficiency of energyintensive technological processes including ESP oil production. Permanent magnet motors, which have already occupied a leading position in a number of areas, have better performance characteristics than asynchronous submersible electric motors.
ESP system drives based on permanent magnet motors were not used in the oil industry until recently, but they are currently achieving wider application at the fields of various oil-producing companies.
Many oil industry equipment producers have developments in this field, e.g. JSC RITEK, CJSC KB Neftemash, and others. This also includes LLC Borets, which supplies series VEDBT 117 mm submersible permanent magnet motors for TNK-Nizhnevartovsk and SNGDU-2.
New Approach of Integrated Validation of Reservoir Oil Properties in Reserves Estimation and Field Development Planning
Authors: Nugaeva A. N. , Brusilovsky A. I. 
Published: October 2008

Abstract
This paper presents an integrated approach to validate reservoir oil volumetries and determine their properties versus pressure used in field development planning and monitoring. This approach allows reconciliation of reservoir oil properties used both in reserves estimation and field development planning and monitoring.
The paper reviews an engineering procedure of generating an adequate multicomponent reservoir oil model based on laboratory analysis of representative reservoir oil samples and their recombination using equation of state. The procedure does not require recourse to regression analysis which is routinely used in Eclipse, VIP and other simulators.
With specific reference to hydrocarbon systems of the West Siberian fields, we review the influence of the actual onsite separation conditions and official standard concerning stock-tank oil vapor pressure on values of such volumetric parameter as formation volume factor, stock-tank oil density, solution gas-oil ratio.
Associated Petroleum Gas Conversion into Liquid Hydrocarbons in Barrier Discharge Plasma
Authors: Goncharov I. V. , Veklich M. A. , Lopatin V. V. 
Published: October 2008

Abstract
Experimental data on natural gas hydrocarbons conversion in the low-temperature plasma are provided. The impact of different process parameters (pulse rate, volumetric gas throughput) upon gas hydrocarbons conversion degree is examined. In order to increase the liquid hydrocarbon output and decrease reactor size, the multitubular composition of plasma-chemical reactor was applied. Positive results demonstrated the possibility of using multitubular reactors when working with high frequencies (200 Hz and higher) in order to obtain higher hydrocarbons from lower methane homologs.
Analysis of Causes of Hign-Rate Corrosion Occurring at Electric Motors of Submersible Pumps
Authors: Daminov Azat , Ragulin Victor , Voloshin Alexander , Litvinenko Vitalii , Mikhailov Alexander , Tyapov Oleg 
Published: October 2008

Abstract
The problem of corrosion damages of submersible equipment installed in wells does exist in almost all the oil producing regions in spite of different production conditions, equipment operation and produce composition.
The analysis of submersible pump operating conditions at RN-Purneftegas JSC has shown that cavitation-erosion effect exerted on the equipment under the conditions of extremely high fluid flow velocities in the electric motor-flow tubing annular space is one of the principal causes of rapid corrosion of submersible electric motors. The corrosion process under high watercut conditions (&gt;80%) is encouraged should the formation water saturated with dissolved carbon dioxide contact the electric motor exterior surface. Resulting corrosion reduces the well overhaul period by a factor of ten. The annual loss amounts to 130 mln. roubles.
To increase the mean-time-between-failures of electrical centrifugal pump (ECP) units the procedures have been worked out to improve the operational integrity of the submersible pumping equipment and methods of corrosion activity reduction by means on inhibiting the produce.
Sidetracking Implementation on Western Siberia Oil Fields with Jurassic Reservoirs
Authors: Koshovkin I. N. , Fomin A. I. , Shevelev P. V. , Molodykh P. V. , Utkina K. E. 
Published: October 2008

Abstract
Nowadays sidetracking is an effective technology that allows increasing of residual oil production as well as recovering damaged wells. During 2006 – 2007 JSC Tomskneft drilled 69 sidetracks mainly in Jurassic reservoirs. Average oil flow rate after sidetracking reached 29 tons per day, average water cut equals 49 percent. Liability of modeling is 97 percent for liquid flow rate and 76 percent for oil flow rate. There are several geological and technological reasons for lower actual production rates. This report summarizes methodical issues of sidetracking decision making process.
Integrated Modeling of the Priobskoe Oilfield
Authors: Antonenko D. A. , Pavlov V. A. , Sevastyanova K. K. , Usmanov T. S. , Zhdanov R. M. 
Published: October 2008

Abstract
At present time the integrated modeling is a new and dynamically developing area of the present-day petroleum engineering. At the classical approach to filed development, the reservoir, well and surface facilities models, as a rule, are created and optimized separately from each other. However, attempt of optimizing the field development system as a whole should consider for the interaction of all elements of the field development system, since optimization of one element can lead to changes in input condition and deoptimization of the others. Such approach means that the field development optimization should combine reservoir, well and surface facilities modeling to allow the field development managing based on maximizing technical and economic performance.
Creation of the integrated model for such huge fields as Priobskoe demands enormous computing expenses and does not allow fast enough necessary calculations for operative optimization of development system by means of the integrated reservoir-well-facilities model.
This article provides a discussion on the rescaling issues of the existing detailed field model. A typical rescaling procedure, consisting in proportional integration of the cells sizes of reservoir hydrodynamic model up to tens meters and more, appeared an insufficient for satisfying the objectives. There was a necessity of creation of an integrated model with the optimum size of an element comparable with the size of one pad.
This article demonstrates the technique of the hydrodynamic model construction, consisting of several hundreds not of orthogonal cells, the issues of properties averaging and production activity in a cell-pad, and reviews the results of comparison initial and approached ("proxy") field models. The final model integrated well and surface facilities models. It allowed to reduce essentially an estimated time of the integrated model, and thus to predict operatively with the required accuracy the basic technological indicators of the Priobskoe field development and to optimize the field development and surface facilities design.