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Investigation of the efficiency of restrained oil displacement using of enhancing oil recovery methods

Uhrynovskyi A. V., Moroz L. B., Kogut G. M.

Journal of Achievements in Materials and Manufacturing Engineering

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2022

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Vol. 110, nr 1

27--34

EN

Purpose: The purpose of this article is to highlight the main problems that arise during the final stage of oil field development. Based on the identified problems using the EORgui program, Petroleum Solutions Ltd it is necessary to select the most effective method to increase oil recovery and study the most optimal tertiary oil recovery method using a hypothetical field model as an example, which will ensure the maximum oil recovery factor. Design/methodology/approach: Study of oil tertiary displacement efficiency by applying tertiary methods were performed using EORgui software from Petroleum Solutions Ltd and Petrel from Shlumberger. Findings: The results of the research show that the most optimal method of oil recovery increasing for this hypothetical field is the injection of carbon dioxide. When using this method, the oil recovery rate reaches 23%. Research limitations/implications: When using carbon dioxide, it is necessary to have sources of supply near the field, as well as increased corrosion of petroleum equipment is possible to occur. Practical implications: The use of the proposed approach is an important condition for the effective extraction of residual oil reserves for most fields developed using the reservoir pressure maintenance system. Originality/value: The article presents the characteristic features of residual oil location, reveals the conditions for effective usage of methods to increase oil recovery and their selection procedure.

2

Economics of combined CO2-EOR and CCS projects based on the example of a Polish multilayered oil field

Kosowski Piotr

Archives of Mining Sciences

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2020

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Vol. 65, no. 2

241--254

EN

The article presents a comprehensive economic analysis of a CO2 injection project in one of the Po-lish oil fields for both increased production (CO2-EOR) and underground storage (CCS). An interesting differentiator of this work is the use of a multilayered reservoir, which is actually not one reservoir but several located in the same place, as an example. It allows the optimization of the processes of injection, production and storage. Such projects are becoming more and more important because recently, after a period of long-term stagnation, costs of carbon allowances have started to rise which affects e.g. the electricity market in Poland. This can be an important incentive for the development of CCS technology, especially in combination with CO2-EOR. In the case of very high costs of carbon emissions rights CCS may turn out to be a cheaper solution. Economic efficiency is the main determinant of the EOR project’s success, as well as a very significant factor influencing the potential development of CO2 underground storage. Results are based on the numerical simulation of a combined CO2-EOR and CCS project. This analysis has been divided into two parts. The first uses a standard, deterministic approach, based on the DCF method and NPV indicator. It also provides a detailed sensitivity analysis, with particular reference to the impact of oil prices and the cost of carbon emissions rights on a project’s profitability. The second part of the economic analysis is probabilistic and involves estimating the maximum amount of CAPEX using the Monte Carlo method. Two cases were taken into account. The first assumes that the CO2 emitter pays for CO2 storage and the price is equal to 80% of the emissions rights price (with storage revenue). In the second one the emitter does not pay for storage (without storage revenue).

3

Modeling of ground subsidence in oil fields

Szostak-Chrzanowski A., Chrzanowski A., Ortiz E.

Technical Sciences / University of Warmia and Mazury in Olsztyn

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2006

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nr 9

133-146

EN

A method of integrated analysis and prediction of ground subsidence in oil fields is being developed at the Canadian Centre for Geodetic Engineering. The method utilizes the in-situ data such as location and geometry of the oil reservoir, geology, pressure in oil wells, production data, and surface deformation monitoring results. The data is used in forward analysis of deformation analysis of the rock mass. The reservoir compaction and subsidence modeling is based on the functional relationship between production, change of pressure in underground oil reservoir and measured ground subsidence. As a first stage of the study, various methods of ground subsidence modeling have been implemented and compared in modeling the effects of oil extraction in oil fields along La Costa Oriental del Lago de Maracaibo (COLM) in Venezuela. A method of "nucleus strain", Knothe's influence function, and finite element method have been used in the comparison.

PL

Metoda zintegrowanej analizy i przewidywania osiadania powierzchni górotworu wywołanego wydobyciem ropy naftowej została opracowana przez Kanadyjskie Centrum Geodezji Inżynieryjnej. Metoda ta jest oparta na wykorzystaniu takich informacji, jak geometria zbiornika roponośnego, budowa geologiczna górotworu, stan ciśnienia w otworach wiertniczych, dane wydobycia ropy naftowej oraz dane pomiarowe osiadania powierzchni górotworu. Dane te są wykorzystywane w modelowaniu osiadania powierzchni górotworu na podstawie obliczonej kompakcji zbiornika roponośnego. W analizie wykorzystano relacje między zmianami ciśnienia w zbiorniku, produkcji i pomierzonym osiadaniem powierzchni. Porównano trzy modele obliczania osiadania powierzchni, wykorzystując dane z eksploatacji pól naftowych w La Costa Oriental del Lago de Maracaibo (COLM) w Wenezueli. Modelami tymi były model "nucleus strain", metoda Knothego oraz metoda elementów skończonych.