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Khisamov R.S.,Tatneft | Faizullin I.N.,Tatneft | Kubarev P.N.,Tatar Oil Research and Design Institute | Antonov G.P.,Nauka OOO
Neftyanoe Khozyaistvo - Oil Industry | Year: 2011

The paper presents results of tracer tests to determine porosity and permeability of fractured reservoirs. The tests were carried out in Area No. 303 developed by water drive with forced fluid withdrawal. Communication between layers in the cross-section has been established.


Khisamov R.S.,Tatneff OAO | Shelepov V.V.,CKR Rosnedra | Baziv V.F.,CKR Rosnedra | Blinov A.F.,Nauka OOO
Neftyanoe Khozyaistvo - Oil Industry | Year: 2010

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 waterfloodlng of Romashkinskoye field objects is provided by active control of the productive strata flushing processes during the entire period of development.


Ibatullin R.R.,TAL Oil Ltd. | Nasybullin A.V.,Tatar Oil Research and Design Institute | Salimov O.V.,Tatar Oil Research and Design Institute | Salimov V.G.,NAUKA OOO
Neftyanoe Khozyaistvo - Oil Industry | Year: 2014

Efficient frontier for longitudinal fractures is defined, which shifts towards permeability increase with increase of reservoir fluid viscosity. Transverse fractures are more attractive in low-permeability reservoirs. For higher permeabilities, longitudinal fractures are favorable. The lower is the dimensionless conductivity of induced fracture, the more advantageous is to fracture horizontal well longitudinally. If creation of high dimensionless conductivity fracture is unfeasible, longitudinal fractures should be considered. The number of vertical fractured wells equivalent to a single horizontal well with transverse fractures for the conditions encountered in Tatarstan fields is approximately half the number of transverse fractures.


Berdnikov D.A.,Tatar Oil Research and Design Institute | L'vova I.V.,Tatar Oil Research and Design Institute | Rylov N.I.,Nauka OOO | Mironova L.M.,Nauka OOO | Khuzina L.B.,Almetyevsk State Petroleum Institute
Neftyanoe Khozyaistvo - Oil Industry | Year: 2012

A conceptually new completion method Involving forming of lengthy drain channels to establish connectivity with the productive formation is considered. A new type of rotary perforator allows non-damaging drilling of drain channels up to 1 m long and 20 mm in diameter. The paper presents results of the detailed analysis of the completion technology, as well as conclusions and practical recommendations.


Kadyrov R.R.,Tatar Oil Research and Design Institute | Patlay D.A.,Tatar Oil Research and Design Institute | Khasanova D.K.,Nauka OOO | Baiburdov T.A.,AKRIPOL OOO | Stupenkova L.L.,AKRIPOL OOO
Neftyanoe Khozyaistvo - Oil Industry | Year: 2014

Due to significant depletion of reserves in Devonian terrigenous formations, carbonate reservoirs are often considered as targets for resuming production in spite of their complex geometry and high water cut. In this regard customized synthesis of water-shutoff chemicals is required to effectively shut off unwanted water production. One of the most promising water shutoff techniques analyzed in this paper is application of a modified elastomer which swells in water to a limited degree and maintains its plugging ability for a long period of time.


Takhautdinov Sh.F.,Tatneft | Fatkullin R.Kh.,Tatar Oil Research and Design Institute | Zagidullin R.G.,Nauka OOO
Neftyanoe Khozyaistvo - Oil Industry | Year: 2013

The authors will review the progress of Tatneft's drilling activities. Application of advanced technologies and the latest equipment, as well as competent management, ensures consistent operations and meeting the targeted levels of performance.


Marchenko I.R.,Tatar Oil Research and Design Institute | Danilov D.S.,Tatar Oil Research and Design Institute | Zatsarina L.V.,Tatar Oil Research and Design Institute | Kizim O.V.,Tatar Oil Research and Design Institute | Iskhakova A.M.,NAUKA OOO
Neftyanoe Khozyaystvo - Oil Industry | Year: 2016

Enhancing oil recovery (EOR) and maintaining sustainable production rates are very important aspects in the development of mature fields where most prolific producing zones are developed at earlier stages. Back in 1969, initial production operations in the Tan-Kandyzskoye field were targeted at Pashian reservoirs and involved peripheral water injection followed by boundary waterflooding. Adequate reservoir management strategy enabled not only to prevent rapid increase of water cut but also to suppress reservoir pressure depletion. Peak oil production was achieved in 1972 with the subsequent production decline observed since 1982. Decreased oil flow rates were attributed to water cut increase and deteriorated quality of residual Pashian reserves. Cessation of any further drilling in the early 1990s also slowed down the rates of field development. Further, 2004 has witnessed an increase in oil production and substantial decrease of average annual water cut due to drilling through Bobrikovian, Kizelovskian, and Vorobievian production zones, successful implementation of dual completion technology, optimization of waterflood pattern in the Pashian formation, water injection in other production zones, revitalization of idle wells, and selective application of various physical and chemical methods. These helped recover in 2015 42% of peak oil production obtained in 1972. The following activities are proposed for efficient development of residual oil reserves: further drilling in oil-saturated areas of production zones, sidetrack drilling, continued use of dual completion method, optimization of waterflooding program, including initiation of water injection in the Kizelovskian production zone. Depending on bedding conditions and reservoir quality, well-proved effective EOR methods are recommended.


Khisamov R.S.,Tatneft | Salimov O.V.,Tatar Oil Research and Design Institute | Borisov G.A.,PSK Garant | Salimov V.G.,Nauka OOO
Neftyanoe khozyaystvo - Oil Industry | Year: 2015

An experimental study has been conducted to investigate the effect of confining stress on acid-etched fracture conductivity for the Bashkirian and Tournaisian rocks of Tatarstan oil fields. One of the main causes of the discrepancy between forecast and actual production performance after fracture treatments is an overestimated fracture conductivity values obtained using the Nierode-Kruk equation. It has been found that the Nierode-Kruk correlation properly describes acid fracture conductivity variations in the Tournaisian rocks and can be put into practical use; however, it delivers substantially higher fracture conductivity values for the Bashkirian rocks. The solution is seen in application of the equations derived in this paper that exclude the dependence on Brinell hardness.


Ibatullin R.R.,Tatar Oil Research and Design Institute | Podymov E.D.,Tatar Oil Research and Design Institute | Vasiljev E.P.,Tatar Oil Research and Design Institute | Slesareva V.V.,Nauka OOO
Neftyanoe Khozyaistvo - Oil Industry | Year: 2010

The purpose of the study is to Justify selection of a certain EOR technology based on the results of its practical application. The results of the study are needed to plan economically effective operation of TATNEFT Company In the short term. The paper describes processes taking place In a reservoir when different chemical agents have been injected. Positive and negative factors affecting the efficiency of technologies are described; results of different technologies in the same initial conditions are evaluated. The authors analyze the performance of different EOR technologies in the same area and in the same well.


Berdnikov D.A.,Tatar Oil Research and Design Institute | L'vova I.V.,Tatar Oil Research and Design Institute | Khuzin R.R.,CARBONOIL OOO | Rylov N.I.,NAUKA OOO | Mironova L.M.,NAUKA OOO
Neftyanoe Khozyaistvo - Oil Industry | Year: 2012

A conceptually new completion method to prevent water cut of the wellstream resulting from bottom water breakthrough to the annulus is considered. The technology is realized at the stage of completion; it Involves selective forming of a protective screen In the water contributing interval. The paper presents results of the analysis of the completion technology, as well as conclusions and practical recommendations.

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