2022
DOI: 10.28991/hij-2022-03-01-09
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Production Data Analysis Techniques for the Evaluation of the Estimated Ultimate Recovery (EUR) in Oil and Gas Reservoirs

Abstract: The calculation of oil reserves (estimate ultimate recovery, EUR) is required for reservoir management. It is important to differentiate between oil reserves and oil resources. The latter is roughly defined as the sum of recoverable and unrecoverable volumes of oil in place; whereas, the oil reserves can be defined as those amounts of oil anticipated to be commercially recoverable from a given date under defined conditions. However, there is always uncertainty when making reserve estimates, and the main source… Show more

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Cited by 7 publications
(2 citation statements)
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“…The change in permeability in the initial period is associated with a decrease in pressure in the reservoir and rock deformations [29,30]. If the field is large in area and has large reserves, then changes in permeability can lead to a significant deterioration in production [31] For more accurate forecasting of the natural gas flow rate, it is necessary to introduce refinements with the dependence of permeability on effective stresses. We state that there are significant changes in well operation and workovers associated with abrupt changes in gas production and the impossibility of using the Arps equation for wells W-3.…”
Section: Discussionmentioning
confidence: 99%
“…The change in permeability in the initial period is associated with a decrease in pressure in the reservoir and rock deformations [29,30]. If the field is large in area and has large reserves, then changes in permeability can lead to a significant deterioration in production [31] For more accurate forecasting of the natural gas flow rate, it is necessary to introduce refinements with the dependence of permeability on effective stresses. We state that there are significant changes in well operation and workovers associated with abrupt changes in gas production and the impossibility of using the Arps equation for wells W-3.…”
Section: Discussionmentioning
confidence: 99%
“…Due to advances in technologies for developing unconventional reservoirs (characterized by low porosity and low permeability) in Russia, research interest has increased in the study of hydrocarbon accumulations in high-carbon shale formations, which are widely distributed and known as the most significant oil and gas source in Western Siberia (bazhenov and abalak formations), Timan-Pechora and Volga-Ural basins (domanik formation), in the North Caucasus (khadum formation) and on the Siberian platform (kuonam formation) (see Figure 1). The primary object of scientific and industrial interest in accumulations of hydrocarbons in reservoirs characterized by low porosity (shale strata) on the territory of Russia is the Bazhenov formation of Western Siberia, whose huge hydrocarbon potential (estimated from 10 to 75 billion tons of recoverable oil reserves) is not in question today, and the main research areas are related to the development of technologies for localizing areas of the high concentration of hydrocarbons and creating acceptable technologies for their development (1). Searching and exploring new ways to increase the raw material base will also help diversify the state's oil sector to build a sustainable resource base (2).…”
Section: Introductionmentioning
confidence: 99%