Open AccessSeismically detected porous Zechstein carbonates in Southern Jutland, Denmark
Author(s) -
Kim Gunn Maver
Publication year - 1995
Publication title -
bulletin of the geological society of denmark
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.674
H-Index - 28
eISSN - 2245-7070
pISSN - 0011-6297
DOI - 10.37570/bgsd-1995-42-04
Subject(s) - geology , carbonate , seismogram , lithology , porosity , seismology , seismic to simulation , carbonate rock , mineralogy , petrology , seismic inversion , sedimentary rock , geotechnical engineering , geochemistry , geometry , materials science , mathematics , azimuth , metallurgy
Zechstein carbonates in Southern Jutland, Denmark, have been explored by 10 wells since1952, and a total of more than 2000 km of 2D seismic data has been acquired by variouscontractors. Seismic modelling, based on all the well data, is used as an aid to predict thelateral distribution of porous Zechstein carbonate intervals from the seismic data.ID seismic modelling is used to define the maximum number of intervals detected bythe seismic sections at well locations. The ID seismic modelling results are also used toderive 2D acoustic impedance models and corresponding synthetic seismograms. Theseismic modelling results illustrate a number of diagnostic reflection patterns associatedwith the porous carbonate intervals. The predicted distribution of porous carbonate intervalsis, however, found to be uncertain, as thickness and porosity variations of each intervalcannot be distinguished. Furthermore, thin porous carbonate intervals are not detected bythe seismic sections, and the seismic reflection patterns indicating the presence of porouscarbonate intervals can be associated with other lithologies.Porous Ca-la, Ca-lb, Ca-2 and Ca-3 carbonate intervals are found to be detected by theseismic sections only in the Zechstein platform area, and only the porous Ca-2 carbonateinterval can be mapped