DEFINITION OF OPTIMAL PARAMETERS AND EFFICIENCY ANALYSIS OF CYCLIC STEAM STIMULATION AT TERRIGENOUS RESERVOIRS OF HIGH-VISCOSITY OIL FIELDS IN THE SAMARA REGION

Abstract Due to the decrease in "easy" oil reserves, oil companies are focusing on "hard-to-recover" reserves, in particular, high-viscosity oil reservoirs. Shallow oil reservoirs are mainly concentrated in the Cretaceous horizons, in the western region of the country, along the Caspian coast. One of them is a high-viscosity oil reservoir, consisting of three Cretaceous horizons. The average viscosity of oil in reservoir conditions is around 746.7 cP. The current achieved oil production is only 5% of the initial recoverable reserves, and designed oil recovery factor is 38% and implies the full-scale application of thermal methods of EOR. The objective of this work was to choose the most suitable thermal method of EOR and to assess the prospects of applicability with the calculation of economic feasibility. Considering the geological features of the reservoir, the cyclic steam stimulation was chosen as the optimal method to increase oil recovery. In order to assess the expediency of this technology, was initiated project on thermal modeling the technology based on the current geological and hydrodynamic model of the field, using the results of laboratory studies, calculations were performed on imagined horizontal wells, and carried out the analysis of technical and economic efficiency. According to the results of calculations on the hydrodynamic model, the production rates using the technology of cyclic steam stimulation in horizontal wells are 30% higher than the production rates of "cold production", and the difference in accumulated oil production over 5 years will be 20–30%.

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Two-Phase Filtration Model for Nonlinear Viscoplastic Oil and Hard Water Drive

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.698.679 ◽

2014 ◽

Vol 698 ◽

pp. 679-682

Author(s):

Anastasia Markelova ◽

Artem Trifonov ◽

Valeria Olkhovskaya

Keyword(s):

Hard Water ◽

Component Composition ◽

High Viscosity ◽

Oil Fields ◽

Nonlinear Dependence ◽

Fractional Flow ◽

Two Phase ◽

Oil Flow ◽

High Viscosity Oil

The article offers a method to solve Buckley-Leverett’s problem, taking into account the nonlinear dependence of the filtration rate of viscoplastic oil on the pressure gradient. This method is based on the transformation of the fractional flow function by introducing in the theory of water drive the equations reflecting the rheological features of the oil flow. The resulting model allows us to quantify the influence of rheological factors on the completeness of the water-oil displacement and to calculate the performance, taking into account the component composition of the hydrocarbon phases. Taking the Samara Region oil fields as an example, the article shows that the quality of design is unsatisfactory when the bundled software being used does not take into account specific non-Newtonian properties of the high-viscosity oil.

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Analysis of the polymer flooding efficiency in one of the high-viscosity oil fields based on mathematical modeling

10.3997/2214-4609.202157048 ◽

2021 ◽

Author(s):

M.G. Persova ◽

Yu.G. Soloveichik ◽

A.S. Ovchinnikova ◽

D.S. Kiselev ◽

I.I. Patrushev

Keyword(s):

Mathematical Modeling ◽

High Viscosity ◽

Polymer Flooding ◽

Oil Fields ◽

High Viscosity Oil

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Cyclical Gel-Polymer Flooding Technology is an Effective Method of Enhanced Oil Recovery in High-Viscosity Oil Fields

10.2118/201824-ms ◽

2020 ◽

Author(s):

Svetlana Yur’evna Lobanova ◽

Berdibek Ulanovich Yelubaev ◽

Nikolay Evgen’evich Talamanov ◽

Zhijian Sun ◽

Chunxi Wang ◽

...

Keyword(s):

Enhanced Oil Recovery ◽

Oil Recovery ◽

High Viscosity ◽

Polymer Flooding ◽

Oil Fields ◽

High Viscosity Oil

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PRODUCTION REDUCTION ANALYSIS AND WELL OPERATION ANALYSIS

Bulletin of the National Technical University KhPI Series Innovation researches in students’ scientific work ◽

10.20998/2220-4784.2021.02.12 ◽

2021 ◽

pp. 92-98

Author(s):

Ivan Zezekalo ◽

Svetlana Bukhkalo ◽

Iryna Ivanytska

Keyword(s):

Development Strategy ◽

Oil And Gas ◽

Correct Choice ◽

High Viscosity ◽

Oil Fields ◽

Technical Knowledge ◽

Work Processes ◽

Operation Analysis ◽

Efficient Prediction ◽

High Viscosity Oil

The method of Arps fall curve as an effective method that allows reliable and efficient prediction of well flow, a necessary parameter for optimal and correct choice of well operation is considered in the article. Forecasting the flow rate of wells in fields with high-viscosity oil stocks is one of the most difficult tasks in the development of oil fields. It is proved that the use of the Arps method simplifies this task, as it gives the correct results quickly and easily. The importance of the choice of well operation methods is analyzed. It has been proven that the analysis of reduced production is a means of identifying productivity problems in wells to assess their future productivity and expected service life. The use of the Harmony Enterprise platform is designed to analyze the performance of oil and gas wells and inventory assessment, to create common corporate work processes, use technical knowledge and exchange interpretations, which allows you to identify promising assets, evaluation and development strategy. The results of this work are very important and necessary for further research and analysis of the fall in production and analysis of the well.

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Hydrodynamic modeling of field development using enhanced oil recovery methods

Kompleksnoe ispolʹzovanie mineralʹnogo syrʹâ/Complex Use of Mineral Resources/Mineraldik shikisattardy Keshendi Paidalanu ◽

10.31643/2021/6445.13 ◽

2021 ◽

Vol 317 (2) ◽

pp. 14-22

Author(s):

G.Zh. Moldabayeva ◽

◽

A.Kh. Agzamov ◽

R.T. Suleimenova ◽

D.K. Elefteriadi ◽

...

Keyword(s):

Oil Recovery ◽

Seismic Data ◽

Water Injection ◽

Steam Injection ◽

High Viscosity ◽

Oil Fields ◽

Borehole Data ◽

Field Development ◽

High Viscosity Oil ◽

Cyclic Injection

This article discusses a digital geological model, the transfer of borehole data to the geological grid, and the modeling of the technology of alternating steam and water injection. Alternating injection involves the cyclic injection of steam and water into an injection well in high-viscosity oil fields. The essence of this technology is that during the steam injection for 2-4 months, the formation warms up, leading to a decrease in viscosity and an increase in oil mobility. Then comes the period of water injection, during which the production of already warmed oil continues and the formation pressure is maintained. For digital geological modeling, the following data were collected, processed and prepared: a list of wells that open the object of modeling, coordinates of wellheads, well altitudinal data, inclinometry of well trajectories, GМS data on wells, analysis of wells drilled with core sampling, and digitized seismic data (structural surfaces on the roof of stratigraphic horizons, parameter maps, contact surfaces, faults, structural maps on the roof of target horizons with faults, isochron maps, velocity maps).

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