Blicharski, Jacek
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inżynieria środowiska, górnictwo i energetyka
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Item type:Article, Access status: Open Access , Analysis of selected problems encountered while testing natural gas-condensate fields in the Western Carpathians(2015) Rybicki, Czesław; Dubiel, Stanisław; Blicharski, JacekThe potential change of natural gas composition in the near-wellbore zone creates a big problem with the selection of appropriate initial value of counterpressure exerted by the displacement fluid on reservoir during the test, and also with the interpretation of the reservoir and production tests results. The analysis of the industrial data reveals that the effect of condensate production in the near-wellbore zone could take place while using too high counterpres-sure during DST tests, as a consequence of using a relatively high column of water displacement fluid in the DST column, i.e. about 2500 m. This thesis can be confirmed after further detailed theoretical analysis of the occurring thermodynamic conditions. The paper addresses technological and interpretation problems encountered during drill stem tests (DST) of gas-bearing Devonian strata, on the example of the Stryszawa field in the Western Carpathians. Special attention was paid to the possible changes of gas composition during flow tests and the cases of gas condensation of heavier fractions during build-up tests. Attempts were made at explaining sudden drops of pressure at the build-up stage along with the thermodynamic conditions responsible for this effect. The authors explained the necessity of using an appropriate Ful-Flo sampler in the DST set for collecting gas samples at any time of the test, and devices for continuous measurement of temperature. The use of new types of drill stem testers and appropriate interpretation methods, which would account for a detailed analysis of technological and reservoir conditions allows for more efficient oil prospecting and deciding about enhancement methods in hydrocarbon production. The analysis of thermodynamic conditions on the bottom of the wellbore allows for selecting proper counterpressure values in view of the condensation of heavier gas fractions in the near wellbore rocks. The analysis of conditions in which heavier gas fractions undergo condensation is approximate and general because the gas samples were collected at the outlet of the DST string (in surface conditions), without a Ful-Flo sampler and without temperature measurements.Item type:Article, Access status: Open Access , Stanowisko laboratoryjne wypierania się płynów w ośrodkach porowatych w aspekcie sekwestracji CO2(2012) Blicharski, Jacek; Smulski, RafałW artykule przedstawiono stanowisko laboratoryjne do badania wypierania się płynów w ośrodkach porowatych pod kątem geologicznej sekwestracji $CO_{2}$ w sczerpanych złożach węglowodorów. Scharakteryzowano główne elementy stanowiska tj. komorę ciśnieniową do badania próbek skalnych, układ zatłaczania gazów wyposażony w bezpulsacyjną pompę, układ pomiaru ilościowego i jakościowego wypierających się płynów oraz układ zbioru rejestracji danych. Stanowisko to umożliwia badanie różnych zjawisk fizycznych występujących przy wypieraniu się płynów w ośrodkach porowatych w szerokim zakresie ciśnień i temperatur, odwzorowujących rzeczywiste warunki panujące w złożu. W ramach kalibracji stanowiska wykonano pomiary współczynnika przepuszczalności wzorcowego rdzenia, uzyskując korelujące się wyniki.Item type:Article, Access status: Open Access , An evaluation of hydrocarbon deposit tightness in aspect of CO₂ sequestration(2015) Blicharski, JacekDepleted hydrocarbon deposits due to large capacity and proven tightness are often considered as prime candidates for $CO_2$ sequestration in geological structures. The tightness of these structures is mainly connected with the exis-tence of water saturated overbunden rocks of very low permeability which form a natural barrier for the migration of hydrocarbons. This paper explains the sealing mechanisms of caprocks resulting from capillary forces at the interface of hydrocarbon – water and carbon dioxide – water contact. Other ways of caprock leakage due to rock fracturing or reactivation of natural faults and fi ssures were also investigated.Item type:Article, Access status: Open Access , The analysis of CO₂ injection in depleted gas reservoirs during the sequestration process(2015) Gonet, Kamil; Blicharski, Jacek; Rybicki, CzesławOne of increasingly used methods for reducing carbon dioxide emission to atmosphere is CCS technology (Carbon Capture and Storage). The last element of sequestration technological chain, after capturing and transporting, is $CO_{2}$ storage which is currently considered in: natural environment, oceans and geological structures – of which depleted gas reservoirs have high sequestrating potential mainly by virtue of proven record of geological recognition and high recovery factor, hence, great storage capacity. This paper is connected with first stage of $CO_{2}$ storage in depleted gas reservoir i.e. flow of injected fluid inside the well. Conducted analysis was concerned about $CO_{2}$ flow conditions inside the injection well in various stages of $CO_{2}$ storage process, and furthermore, relation between reservoir pressure, injection rate, well diameter. Moreover, the thermodynamic conditions and its impact on changeability of PVT parameters and hence phase changes were also investigated.Item type:Article, Access status: Open Access , Evaluation of possible applications of membrane separators for purification of gas from unconventional deposits(2014) Stec, Grzegorz; Rybicki, Czesław; Blicharski, JacekIn this paper the types of membranes used for purification of the gas streams were described, the principle of operation was discussed and the main areas of the industrial use of this type of separation equipment in the world were identified. The possibility of using membranes for natural gas purification in particular the unconventional gas (shale gas, natural gas with nitrogen) was analyzed. The authors presented the criteria for selecting the size of the membranes, the critical parameters of membrane system, the necessary installation and compilation of technology enabling the proper conduct of the separation process. Based on the experience of different companies rated the advantages and disadvantages of using membranes for gas treatment in Polish exploitation and transmission conditions both from the technological and the economic point of view. The paper ends with proposals for the possibility of application of the system of membranes for the purification of gas from unconventional sources.Item type:Article, Access status: Open Access , Analytical prediction model of UGS performance(2014) Blicharski, Jacek; Rybicki, Czesław; Stec, GrzegorzThe purpose of underground gas storage in porous media is to allow compensation for peak shaving in gas consumption. Especially during the winter months, the stored gas must then be supplied at fuli capacity for short periods. Currently storage capacities of existing UGS facilities in Poland are not fully sufficient for proper regulation of gas demand. The more they do not overcome long term limitation in gas supply from import. There is therefore a need for increasing capacity of existing UGS or development of new ones. This paper presents an analytical model based on equations of material balance combined with well inflow and tubing performance equations for modeling gas storage operations. Presented model was used to maximize the capacity and efficiency of natural gas storage developed in partially depleted gas fields located in the region of south-eastern Poland for a given reservoir/well configuration. On the basis of this model variant scenario of gas storage operation with the use of vertical and horizontal wells were demonstrated.