Wyniki wyszukiwania - BazTech

1

Factors affecting the water coning behavior in vertical and horizontal wells

Salavatov T. Sh., Suleymanov A. A., Ghareeb A., Mamedova Y. V.

Prace Naukowe Instytutu Nafty i Gazu

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2010

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nr 170 wyd. konferencyjne

845--849

EN

Production from the well would create pressure gradients that tend to lower the gas-oil contact and elevate the water-oil contact in the immediate vicinity of the well. Counterbalancing these flow gradients is the tendency of the gas to remain above the oil zone because of its lower density and of the water to remain below the oil zone because of its higher density. These counterbalancing forces tend to deform the gas—oil and water—oil contacts into a bell shape forming what is called coning. Delaying the encroachment and production of gas and water are essentially the controlling factors in maximizing the field's ultimate oil recovery. Since coning can have an important influence on operations, recovery, and economics, it is the objective of this paper to develop a computer program for calculating the critical oil rate to avoid coning of unwanted fluids into production wells and to predict the behavior of water coning in vertical and horizontal wells. The effect of various reservoir and fluid parameters (horizontal permeability, vertical permeability, drainage radius, oil column thickness, oil viscosity, porosity, oil rate, etc.) on the coning behavior in vertical and horizontal wells was investigated extensively by varying the base case data.

2

Development and selecting the best methods for representing the reservoir and well performance

Salavatov T. Sh., Akhmedov S. F., Emara R. N.

Prace Naukowe Instytutu Nafty i Gazu

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2010

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nr 170 wyd. konferencyjne

783--787

EN

The production engineer should use an appropriate inflow performance relationship (IPR) and multiphase flow pressure loss method to determine the best working point which the well should work or design an artificial lift system or other objectives. Therefore a new specific reservoir IPR was introduced. The proposed IPR has been verified for multiphase flow based on simulator results. In general, error between simulator results and estimates in predicted performance from the proposed IPR is 2.85%. A comparative study was carried out among the best correlations which are used in industry. Pressure loss calculations were performed with original methods of Hageadron—Brown, Beggs—Brill and Orkiszewski, based on the actual field data used in this research.

3

Prinatie resenij po regulirobaniu vodnogo vozdejstvia na zalez’

Salavatov T. Sh., Sulejmanov A. A.

Prace Instytutu Nafty i Gazu

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2008

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nr 150 wydanie konferencyjne

741--744

EN

The choice of strategy and tactics in oil and gas fields' development demands a complex analysis to diagnose the current layer condition. The complex analysis makes it possible to define the tendencies of oil and gas production process's development and to make timely decisions in regulating the regimes of producing and injecting wells' performances. The principles of the dynamic approach to regulate and control the development of a field have been developed. The principles are based on cybernetic approach to the analysis and interpretation of the geological and field information, which is acquired while developing oi1 and gas fields. The suggested approach to making decisions in regulating the development processes, which is based on the principles of the dynamic analysis and which considers the unequilibrium processes of oil production and self organization of the layer system, allows to make well-grounded decisions in regulation and choice of strategy of oil and gas fields development.

4

Physical fields effects on "memory" of nonequilibrium systems

Salavatov T. Sh.

Prace Instytutu Nafty i Gazu

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2006

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nr 137

757-763

EN

The control over nonequilibrium processes occurring in the porous strata and pipes in the course of flow of reservoir fluids requires the search for new solutions and methods basing on the idea of reducing the share of chemical reagents used in the technological processes. The necessity of raising such an issue originates from the problem of effective reduction of expenses that are acute for many spheres of production and scientific activity of a human being. Relevance of the problem becomes more acute in oil-and-gas extracting technologies where the expenses for conducting the industrial operations make up a considerable portion of financial costs. Therefore, a search for new methods of effect hydrocarbon objects with the use of new physical effects will make it possible to regulate and control over nonequilibrium processes occurring in the well-reservoir system. In the investigations of Academician A.H. Mirzadjazade and his school a wide development has been recently received by a whole trend associated with the use of physical fields in the processes of extraction, preparation and transportation of oil and oil products. A high efficiency was reached when using the methods of processing of water and oil-and-water systems by physical fields (temperature field, electric and permanent magnetic field, pressure field, etc.) [1].