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Akhmetgareev V.,Tatar Oil Research and Design Institute | Ibatullin R.,Tatar Oil Research and Design Institute
Society of Petroleum Engineers - SPE Russian Oil and Gas Exploration and Production Technical Conference and Exhibition 2014, RO and G 2014 - Sustaining and Optimising Production: Challenging the Limits with Technology | Year: 2014

A method for assessment and reservoir management of waterflooded fractured-porous reservoirs has been developed. The method has a wide range of applications, from history matching in a research laboratory to selection of optimal well operating practices in the field. Integration of a large number of parameters into one coefficient, specific imbibition rate, makes it possible to assess reservoir development without carrying out well tests, well logging, or laboratory research. The only information that is needed is water front travel time from injection to producing wells. In Tatarstan, fresh water was injected in most of the fields. Time of injected water arrival was determined from decrease of density of produced water. To exemplify the method, two pilots in the Bashkirian Deposit No. 302 of the Romashkinskoye field including 25 producing and 3 injection wells were selected for the project. Distribution of the specific rate of imbibition was analyzed; well handling plan to ensure uniform reservoir depletion has been worked out. The rate of imbibition of the dual-permeability Bashkirian reservoir is most sensitive to production rate or well intake capacity, rock blocks' sizes, rock permeability, formation thickness, and preferential water-wetting angle. The effect of capillary imbibition of waterflooding for distances between the injector and the producers more than 500 m is almost lacking. Maps have been constructed schematically representing distribution of the specific imbibition rate and blocks' linear sizes from injecting to producing wells. Copyright 2014. Society of Petroleum Engineers.

Sattarov R.Z.,Tatar Oil Research and Design Institute
Neftyanoe Khozyaistvo - Oil Industry | Year: 2014

The paper presents the results of statistical regression analysis of hydraulic fracturing efficiency in discontinuous formations. Sweep efficiency was determined using stochastic lithological cubes built with the Irap RMS simulation package. It has been found that hydrofracturing is effective in discontinuous formations characterized by large number of permeable intervals in the section and small-sized sand lenses relative to distance between wells, i.e. hydrofrac efficiency increases with increase of macroinhomogeneity.

Pergushev L.P.,Tatar Oil Research and Design Institute
Neftyanoe Khozyaistvo - Oil Industry | Year: 2011

The unified analytical formula for taking Into account the fluid viscosity effect on the characteristics of a centrifugal pump is proposed. It is supposed to use formulas at soMng optimization problems on reduce costs in oil gathering system, for example, for determination of the optimal demulsifier consumption in the oil gathering system, which provides a minimum energy and demulsifier costs.

Salakhova L.N.,Tatar Oil Research and Design Institute
Neftyanoe Khozyaistvo - Oil Industry | Year: 2011

The paper presents the procedure of geologic modeling of complex Lower Carboniferous oil reservoirs that enables to improve the accuracy of differentiated calculation of oil reserves, to enhance reservoir simulation, and to Improve the accuracy of calculations. Geologic modeling has become an efficient tool helping reservoir engineers to decide on the most efficient stimulation and reservoir management programs.

Runov D.M.,Tatar Oil Research and Design Institute | Laptev A.G.,Kazan State Power Engineering University
Thermal Engineering (English translation of Teploenergetika) | Year: 2015

The electromagnetic water treatment is considered as one of the reagentless methods to reduce the scaling and to improve the cooling efficiency of high-temperature gas flows. It is achieved by the rational choice of the frequency range under laboratory conditions. The choice is made by the lowest particle size distribution of the precipitated particles. The time analysis of the content of hardness salts in the treated water is carried out at the input to and output of the heat exchanger. © Pleiades Publishing, Inc., 2015.

Shatalov A.N.,Tatar Oil Research and Design Institute
Neftyanoe Khozyaistvo - Oil Industry | Year: 2013

Influence of various factors on efficiency of hydrogen sulfide removal using amino formaldehyde-based compositions has been studied. It has been found that the main contributors to efficiency of the process are specific consumption of the chemical agent and the method of feeding and mixing thereof with the oil stream. Increased oil stream temperature facilitates the process, while overall duration of the process determines largely the final concentration of hydrogen sulfide in stock-tank oil.

Valovsky V.M.,Tatar Oil Research and Design Institute
Neftyanoe Khozyaistvo - Oil Industry | Year: 2013

Application of conventional sucker-rod pumping units for well-to-well formation water pumping to energize formation in waterflood pool development projects is commonly limited by high loads on sucker rods and failure to seal polished rods at high pressure. The paper discusses the extension of suckerrod pumps' range of application for well-to-well water pumping. The solutions provide for a downhole booster pump and a plunger-and-barrel assembly located below the polished rod to ensure a reliable sealing. The algorithm has been specified; also, the results of calculations related to the extension of application range in terms of the vertical head at 14 MPa wellhead pressure are presented.

Klimov V.A.,Tatar Oil Research and Design Institute | Valovsky V.M.,Tatar Oil Research and Design Institute
Neftyanoe khozyaystvo - Oil Industry | Year: 2015

The paper considers ways to improve efficiency of beam-pumping wells by means of enhanced reliability of sucker rods. The proposed method for operation of sucker rods relies on technical condition of pumping equipment rather than purpose of application. Achievement of the best economic balance between reliability of rod strings and service life of sucker rods combined with technical-condition evaluation maximizes efficiency of downhole pumping equipment. Besides, this method ensures the utmost overhaul period which is defined by natural physical constraints.

Khakimzyanov I.N.,Tatar Oil Research and Design Institute
Neftyanoe Khozyaistvo - Oil Industry | Year: 2012

The author discusses the history of horizontal drilling and more than thirty years' experience of horizontal laterals and horizontally extended reached wells' operation In the Republic of Tatarstan. The application potential of horizontal technologies by Tatneft OAO is associated with further Improvement of the knowledge base and development of the relevant procedure. Based on the pilot results, three categories of probability of success and efficiency of the Company's development targets have been recognized.

Suleimanov A.Ya.,Tatar Oil Research and Design Institute
Neftyanoe Khozyaistvo - Oil Industry | Year: 2012

More than 75% of total oil resources of the Republic of Tatarstan are associated with the South-Tatarian Arch. Geologic survey of the territory Is still relevant In these days. Inasmuch deposit geology Is determined by pronounced lithofacles changes. Geostatistical modeling Is an efficient tool to simulate geoenvironment variations and to Improve the performance of exploration.

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