Analysis of seismic attributes applied in the structural interpretation of three-dimensional seismic data on the example of Ježevo oil field : master’s thesis

Diplomski rad izrađen je u računalnom programu Petrel TM 2014, a cilj mu je analiza primjene seizmičkih atributa u strukturno-tektonskoj interpretaciji seizmičkih podataka na polju Ježevo. U radu su interpretirana tri horizonta: krovina Gama serije pješčenjaka i horizonti koji odgovaraju elektrokarotažnim markerima Z' i Rs7. U svrhu povezivanja seizmičkih i bušotinskih podataka izrađen je sintetski seizmogram za bušotinu JE-1DU. Prilikom interpretacije polja korišteni su prostorni seizmički atributi: trenutna amplituda, kosinus trenutne faze, varijanca i kaos koji su znatno pomogli pri seizmičkoj interpretaciji. Detaljno je opisana izrada atributa praćenja tragova koji je uvelike olakšao praćenje i interpretaciju sustava rasjeda. Također, izrađeni su i virtualni seizmički volumeni uz pomoć seizmičkog kalkulatora koji su dali nove prikaze atributa varijance i kaosa s jasnije istaknutim diskontinuitetima.This master's thesis was made using the PetrelTM 2014 computer program. The goal of the thesis was to analyze the application of seismic attributes on structural-tectonic interpretation in Ježevo field. Three horizons were interpreted in this thesis: the top of the Gama sandstone series and horizons corresponding to E-log markers Z' and Rs7. For the purpose of connecting seismic and well data synthetic seismogram was calculated for JE-1DU well. Several volume seismic attributes were used to interpret the field: reflection strength, cosine of instantaneous phase, variance and chaos, which made seismic interpretation much easier. Moreover, the ant tracking attribute workflow has been elaborated which greatly facilitated the monitoring and interpretation of the fault systems. Also, virtual seismic volumes were created with the aid of a seismic calculator that gave new insights of variance and chaos attributes with a clearer emphasis on discontinuities