Browsing by Subject "mass balance"

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Access status: Restricted ,
How fluids infiltrate through fractures and change metamorphic rocks - a case study from northern Spitsbergen
(Data obrony: 2017-07-10) Faehnrich, Karol
Wydział Geologii, Geofizyki i Ochrony Środowiska
Metasomatism is a process that involves changes in mineralogical and chemical composition of rocks or their portions due to interaction with fluids. In metasediments from northern Spistbergen clear zonation of metasomatic changes occur. Biotite break downs to chlorite, K-feldspar, titanite and/or rutile. Different mass balance calculations were applied in order to examine element redistribution during chloritization reaction. Textural evidence point out to isovolumetric replacement with H2O, FeO and MgO introduced to the system and K2O and TiO2 removed. Differences in calculated chloritization reactions equations suggest fluid heterogeneity on micro scale and control of local chemical composition on the progress of reaction and final product phases.
Access status: Open Access ,
Zastosowanie metody bilansu masowego w eksploatacji złóż gazu ziemnego w warunkach dynamicznych
(2008) Rybicki, Czesław; Blicharski, Jacek
In many cases of the reservoirs or underground gas storages production exist technical hindrances of closing of wells in time to permit the authoritative measurement of static pressures both at head and bottom of wells. A because important problem in reservoir engineering is the qualification of these pressures, necessary for the verification of resources of gas, from the values of dynamic pressures. Presented paper introduces just the method of marking of average pressures in the reservoir on the ground measured dynamic pressures in the well. This method is based on using of the terminal solution of gas inflow to the well in semi steady state. On the base of the dynamic pressures measurement in production wells one marked values of average pressures in the reservoir and then with the method 'p/z' one executed estimations of energy conditions of analyzed reservoir of the gas and one marked initial resources of gas in zones of influencing of well. Obtained results were verified executing alternative balance calculations basing on measurement of bottom pressures in static conditions. From comparing results the full usefulness of the method.