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The Ladislavci field - tectonics, lithofacies relations and 3D seismics

The Ladislavci oil-field is situated in eastern part of the Drava depression in the south of the Pannonian basin (eastern Croatia). A number of fields exist in the area. Main petroleum reservoirs are the Miocene (Badenian) clastics which are in relatively small area of the field developed in three characteristic facies groups. The 3D seismic consists of 14 swaths each having 6 geophone lines. The neighbouring swaths are overlapping by 3 geophone lines on every side. The source points for every swath are lined from south to north between the second and the fifth geophone line of each solitary swath. Accompanied with an adequate CDP-ROLL recording method, the aforementioned setting reached a nominal fold of 1500 %. A total of approx. 11 000 points was recorded. The recording and processing were performed simultaneously. The processing encompassed several procedures: definition of geometry, sorting of cells, calculation of refractional static corrections, velocity analysis, residual static corrections, stack, rna as well as STOLT and FD migration. The velocity analysis was performed on 36 spots.

Drava depression (Croatia); petroleum reservoir; tectonics; lithofacies relations; 3D seismics

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