It is noted that success of geological exploration depends greatly on reliable monitoring and control of current operations as well as effective geological data sharing. This paper addresses a problem of integration and data sharing between
databases developed by multiple subsoil users. Adequate solutions, if found, would maximize exploration success with minimum investment.

Expandable casings strings applied by Tatneft on a commercial scale allowed complete exclusion of intermediate casing strings from the well designs in the Volga-Ural oil-producing region. Underway is research and pilot tests of expandable systems to isolate trouble zones as thick as 500-1000 m. For expanding of casing strings mechanical and hyd - raulic expansion mandrels are used, along with hydraulic jack, anchor, and by-pass valves.

TatNIPIneft engineers have developed the procedure to control formation caving and sloughing in horizontal wells with expandable profile liner of PBI–144/130 type, which is set in a well per one trip and consists of expandable profiled pipes with threaded ends, a retrievable shoe in the bottom pipe, and a setting head connected with the top pipe with righthand thread. The new procedure was successfully used to isolate the Kynovskian shales when sidetracking a lateral in Well No. 831 in the Romashkinskoye field. The job was done for forty-eight hours. No problems were encountered while further drilling and casing.

Multilateral wells contribute to increase of oil fields’ development efficiency. The paper discusses TATNEFT’s hands-on experience of multilateral wells construction and well intervention operations.

It is shown that well logging may not adequately show whether cement is well bonded with the casing and formation. To achieve better accuracy in evaluation of cement bond quality it is recommended to perform cement-bond logging before and after the production string is run into the well and after cementing jobs are accomplished. Some modifications have been proposed for interpretation of gamma-gamma logging data using Scanning GR-Thickness Fault Detector. In particular it is suggested to introduce anisotropy factor for density measurements of cement sheath around the casing.

The average geological parameters and oilfield development indicators of Romashkinskoye field areas are given. The effect of the fluid withdrawal rate on the efficiency of development is investigated. The comparison of actual and predicted (obtained by V.F. Baziv charts) development indicators of some areas are presented. It is noted, that the relatively high efficiency of waterflooding of Romashkinskoye field objects is provided by active control of the productive strata flushing processes during the entire period of development.

Analysis of geological and well logging data suggests that separate geological units exist in the producing intervals of the Bashkirian stage, which made us consider using dual completion technology for their development. The paper presents geophysical cross-sections illustrating existence of the uppermost and the lowermost units in the Aksubaevo-Mokshinskoye and Nurlatskoye fields. Geological and reservoir models have been constructed. Two development scenarios for Nurlatskoye field, commingled production and dual completion, have been analyzed. The results demonstrate higher efficiency of dual completion vs. commingled production: against the same value of cumulative water production oil recovery factor in the first case is approximately 5 % higher.

Historical development, current trends and future outlook for enhanced oil recovery (EOR) methods in Tatneft OAO determined by oil-field development issues is presented. The company proved to have a wide range of efficient, available and evolving, EOR techniques for various applications. The paper offers a special focus on application of EOR techniques for development of hard-to-recover reserves. A wide application of EOR methods to unconventional oil reserves development requires government motivation by means of lower mineral extraction tax rates. As for the company it should keep updating its EOR techniques.

Principal enhanced oil recovery methods, well stimulation and water shutoff techniques developed by TatNIPIneft research engineers are described

It is noted, that the construction of a bottom of multihole horizontal well with up side holes allows to cross the nonuniform section of carbonate rocks several times and to increase the borehole length along the reservoir. It is concluded that in the conditions of the Bashkirian deposits the pressure maintenance must be carried out elementwise.

Results of steam assisted gravity drainage pilot project in the Ashalchinskoye heavy-oil field are described. Production parameters of horizontal wells differing in geologic setting have been analyzed. It has been shown that the technology is effective for different fluid saturation conditions and may also prove effective in complicated conditions when bottom water is tapped.

The procedure of computer-aided selection of candidate wells for fracturing operations is described by the example of field data from Minnibayevskaya area of the Romashkinskoye field.

This paper describes the ways of optimization of oil production operating costs and improvement of pumping equipment maintenance system based on reliability performance design and optimum set of regulations for oilfield services.

Results of Tatneft OAO five years’ experience of development and commercialization of dual completion technologies for production and injectionare reviewed. The scheme and testing results of two new single-tubing systems with a dividing piston and an electric submersible progressing cavity pump are also presented.

Tatneft OAO has introduced an effective waste water quality monitoring system based on a wide range of different parameters. In most of the Company’s water treatment plants monitoring of principal parameters, such as concentration of solids and oxygen, is carried out on a real-time basis. This allows immediate corrective actions to provide the required quality of water injected for pressure maintenance.

It is presented Tatneft OAO concept for gathering, treatment and transportation of Cheremshano-Bastrykskaya extraheavy oil. This concept enables applying integrated approach to heavy-oilfield infrastructure development considering physical and chemical properties of oil, production conditions, field location, and available surface facilities.

This paper discusses advantages and disadvantages of electrical insulating joints which have been most extensively used for oilfield pipeline construction. New insulating joints developed in TATNEFT present high mechanical strengths and leak-proof properties and guarantee reliable electric insulation at operating pressures of up to 21 MPa. The results of their testing at TATNEFT facilities are discussed. The paper offers a technological solution to reduce accelerated interior corrosion of a joint at pipeline section with less negative electrode potential of outer surface.

Change of a life quality of the population of the southeast of republic Tatarstan in connection with realisation of ecological programs of Open Society «Tatneft» is shown. Calculation of an integrated indicator of an estimation of a life quality of the population is executed.

Since July, 8th, 2010 with good reason it is possible to name the Vankorsky oil and gas deposit the ancestor of new oil region: 10−million the ton of oil extracted this day – weighty to volume the basis. It is a mark to which many oil industry workers go for years. On Vankore industrial extraction has begun more recently – in August, 2009 Therefore when on monitors of knot of the account of the saved up extraction of Joint-Stock Company "Ванкорнефть" there was figure "10 000 000", there was a pride for those who there works, and that these oil industry workers – Russian. And in process of survey of the deposit this feeling gets stronger.

It is noted that modeling of formation and structure conditions of sedimentary cover’s productive horizons in the northeast of the Republic of Tatatarstan promoted the allocation of plots, which are the most perspective on search of oil deposits in TatRITEKneft’s subsoil management territory, elaboration of measures for ensuring growth stocks and optimization of geological exploration. On the results of seismic server has been discovered a new oil field and prepared high-amplitude raises for enter into drilling.

Some peculiarities of natural reservoir-scale fracturing influence upon Timan-Pechora basin oil fields development are considered. Stress is laid that fracturing impacts on engineering of terrigenous reservoir as well as on carbonate type. Examples of successfully correlation between initial well flow and cumulative oil production application for quick fracturing estimation are given.

Necessity of thermo-gas stimulation at the development of deposits with hard-to-recover reserves (bazhenovskaya suite) is substantiated. It was noted, that the base of bazhenovskaya suite deposits development technology is a method, that includes the kerogen conversion (pyrolysis) to liquid and gaseous hydrocarbons, and creation of the system of filtration channels in the matrix, ensuring fluid ingress from it to the reservoir interlayers.

The article describes the efficiency of nine-spot vs. five-spot waterflooding pattern on Permyakovskoye field. It also gives the consecutive analysis of geology, field operation history, and the process of reservoir development. Both conventional methods (based on displacement parameters) and modeling results were used for the analysis. The above studies are of great practical value since their results define the choice of the development system for the analogues ready for operation

Questions of condition estimation of bobrikovsky oil deposits bottomhole productive formations zones (BPZ) of the Unvinskoye, Sibirskoye and Shershnevskoye oil fields dated for the Verhnekamsky deposit of potash salts are considered. Dependence between quantities of the skin-factor and dimensionless diagnostic sign which are defined at proces sing of RCP is investigated. Limit value of the diagnostic sign corresponding to worsened condition of BPZ is established.

The capability of polymer-silicate composition (PSK-2) application as deposit-gel-forming reagent, allowing to regulate the permeability of water-saturated interlayers and to increase the sweep efficiency by treatment, is substantiated. The ability of the PSK-2 to the deposit forming in contact with mineralized formation water is confirmed. The rheological and filtration properties of the compositions BZhK biopolymer, Sialit-30 and PSK-2 I are investigated. The effectiveness of the use of PSK-2 composition for enhanced oil recovery is determined

A quasi-stationary mathematical model for casing leak shutoff using different isolation materials in vertical (deviated) wells completed in sand-stone reservoirs is described. Calculated results are in a good agreement with field data. Employment of this model to select scientific-based technologies can lead to decrease of workover costs and raise the effectiveness of water shutoff jobs.

The results of research works in recent years and field experience in improving the technique and technology of ope - ration of oil wells of water-oil deposits are summarized. Progressive technological processes from construction to ope - ration of wells, providing high efficiency of their work, are reduced to the uniform system.

The advantages of superblocks in the field construction and infrastructure development are given. A scheme for an offshore structure, assembled from superblocks, is presented. The superblock for ground surface facilities is shown.

The estimation technique of depth of intensive formation of paraffin sediments on downhole equipment, based on definition of thermodynamic conditions and temperature of oil saturation by paraffin in wells is offered

Results of investigation of the reliability of systems and components of the upper equipment of the pulling units UP 40S, used at wells remedial work, are given. Laws and parameters of distributions of mean-time-between-failures of the examined components of pulling units are determined.

The main problems of the investigation on reliability of hydraulic cylinders applied in mobile oil fıeld plants. By applying the method of factor ranging immediate directions of the experiments have been determined and it will reduce the volume of carried out investigations.

The EOMS (Extensive objects continuous monitoring system) developed by Russian scientists and being successfully implemented by “OMEGA” Company shows its effectiveness for the protection of underwater pipelines. Key EOMS advantages in comparison to systems of previous generations are simplicity of installation, exact and instant localization of fluid leak and absence of electrically powered gauges along the pipeline.

Depending on oil density, the extracting company receives additional profit or suffers a loss, compared to the Urals brand, by delivering oil to the world market. This fact should be considered while planning the development of fields with individual schemes of transporting crude to the world market.

Depending on oil density, the extracting company receives additional profit or suffers a loss, compared to the Urals brand, by delivering oil to the world market. This fact should be considered while planning the development of fields with individual schemes of transporting crude to the world market.

It is noted that currently in the field of FEC effectively works the system that provides a comprehensive approach to the issue of industrial safety expertise and confirmation of competence of expert organizations, experts and testing laboratories involved in expertise.