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EN
In modern realities, there is no unified methodology for the economic assessment of geological exploration in subsoil use. The main research question of this study was to develop a methodology for the new economic model formation for assessing geological exploration in the subsoil use for the mineral resource base rational use. The new methodology can facilitate the assessment of subsoil users of hydrocarbon reserves and resources and government bodies when putting resources and reserves on the balance sheet. In the course of the study, modeling, observation, description, and analysis methods were used. The result of the study was a new economic model for evaluating geological exploration in subsoil use. The main conclusions can be characterized by the optimization of the main indicators of the valuation of mineral raw materials. The basic principles for calculating discounted cash flow, discount rate, payback period and internal rate of return were developed.
EN
Purpose: The article discusses the range of economic approaches to risk management in the implementation of projects for the development of offshore hydrocarbon deposits. Design/methodology/approach: The article utilizes methods and tools of systemic, situational and strategic analysis, expert assessments, as well as methods for evaluating investment projects. Findings: Within the work, the main risks at the stages of project implementation and formulated proposals for their levelling were analysed. Originality/value: To create competitive conditions for the development of offshore fields, we have identified the main risks arising from the realisation of oil and gas projects, and evaluated their impact on the economic efficiency of projects. This scientific work includes an analysis of investment costs in the development of offshore oil and gas fields in different climatic conditions. This article also discusses the issues of industrial safety and environmental protection in the development of offshore fields.
PL
W artykule przedstawiona została pokrótce budowa polskich Karpat zewnętrznych (z naciskiem na płaszczowinę śląską), scharakteryzowano uwarunkowania geologiczne antykliny Iwonicza-Zdroju oraz opisano warunki występowania akumulacji ropy naftowej fałdu iwonickiego. Zrealizowana została ocena wielkości współczynnika sczerpania zasobów na podstawie analizy krzywych spadku wydobycia oraz przybliżonej formuły matematycznej sumy cząstkowych składników energii wewnętrznej złoża. Opierając się na otrzymanych danych, wykalkulowano prze-widywane, możliwe do eksploatacji w przyszłości zasoby węglowodorów. W wyniku prostych działań matematycznych z wykorzystaniem wcześniej otrzymanych wielkości obliczono całkowite zasoby wydobywalne złoża Iwonicz-Zdrój, a także jego zasoby geologiczne.
EN
The aim of this article is to briefly present the structure of Polish Outer Carpathians (with emphasis on the Silesian Nappe), characterized geological conditions of the Iwonicz-Zdrój anticline, and describe conditions of occurrence of the Iwonicz fold oil accumulation. The recovery factor of oil was determined with the application of production decline curves, and approximate mathematical formula of the sum of partial constituents of the field energy. Based on the data received, possible future resources was predicted. With simple mathematical operations using the previously calculated values, total deposits of extractable and geological resources from the Iwonicz-Zdrój oil field were obtained.
EN
The study area is located in the central part of the Polish Outer Carpathians in the vicinity of Jasło. Petroleum reservoir described here is the third Ciężkowice sandstone (Upper Paleocene), composed of channel fill and depositional lobe succession. The Osobnica field is a part of an ancient deepwater fan system, referred to as the Eastern Fan. Within this system, seven sandstone packages interbedded with mudstone/fine sandstone deposits were recognized. The first, second and the third package are characterized by coarsening- and thickening-upward trends, and are interpreted as depositional lobes. The overlying four packages, each roughly 40 m thick, show upward fining and thinning and are interpreted as channel fill deposits. In the Osobnica field, the total resources are calculated at about 491 500 tons, of which some 352 600 tons of oil were exploited until 2002. Map of resource arrangement and structural modelling have indicated that the main factor controlling the distribution of hydrocarbons in the Osobnica field is the shape of the structure, whereas facies development played a subordinate role. The main part of oilfields is in the SE elevated part of the Osobnica anticline. Oil accumulated in both channel and lobe deposits, although channel fills appear to be slightly more oil prone.
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