Browsing by Subject "diffusion chimney"

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Access status: Open Access ,
Metody elektromagnetyczne w prospekcji naftowej
(Wydawnictwa AGH, 2011) Stefaniuk, Michał
Hydrocarbons saturating rocks give rise to anomalous changes in physical properties of geological medium and measured geophysical fields, thus allowing discovering and recognizing of oil and gas fields. Deposit complexes are characterized by resistivity increased by 1-4 orders of magnitude. Resistivity contrast appear at the lower boundary of deposit, between reservoir rock saturated with mineralized water and saturated with hydrocarbons, as well as at the upper boundary with low-resistivity sealing clayey rocks. Moreover, a contrast of environment's ability to electric polarization induced by electric current flow appears at the boundary between hydrocarbons and formation water. The indirect indicator of a hydrocarbon deposit is the near-surface zone of sulfide mineralization connected with the hydrocarbon diffusion, which modifies magnetic properties and electric polarization ability of the medium. Examples of investigations made in the zone of the Carpathian oil field »Grabownica« and gas field »Rudka« in the Carpathian Foredeep are presented.
Access status: Restricted ,
Wykorzystanie anomalii geofizycznych generowanych przez procesy geochemiczne w strefie komina dyfuzyjnego w bezpośredniej prospekcji złóż węglowodorów
(Data obrony: 2013-11-27) Janik, Wojciech
Wydział Geologii, Geofizyki i Ochrony Środowiska
Hydrocarbon saturation creates anomalous changes in physical properties of the geological medium, enabling the discovery and exploration of oil and natural gas. This paper describes the method of induced polarization and its application to the direct detection of hydrocarbons. The parameters of induced polarization measurements, in the time and frequency domains are presented. The general indicator of the presence of a hydrocarbon reservoir is a near-surface zone of sulphide mineralization connected with the diffusion of hydrocarbons, changing the magnetic properties and polarizability of geological medium. The methodology of field work on the Carpathian Foredeep area is presented. The maps of induced polarization parameter distributions obtained from the equatorial system and the axial dipole for deposit Rudka were analyzed. Cross sections of three parameters of induced polarization obtained from the axial dipole system were created.