The salt dome boundary interpretation by ray tracing method applied to VSP data

• Autorzy: Kasina A.
• Języki publikacji: EN

Abstrakty

EN

In the paper the computer program for salt dome boundary interpretation has been presented as well as the results of its testing on the synthetic and field data. To define dome shape, the method of transmission between surface and salt well is used. The propsed method is based on ray tracing and takes into account refraction of seismic rays on the intemediate boundaries in the dome overbuden as well as the velocity gradient in the dome's surroundings. The program makes it possible to choose one of three variants of interpretation: the variant with constant velocity in overburden, the variant with constant velocites in layered overburden, the variant with shallow refraction boundaries and velocity gradient in dome surroundings. The program has been tested on the model data. The effect of seismological model parameters and processing parameters on the results of dome shape interpretation has been evaluated. The role of prior velocity information from well measurements and from intepretation of surface seismic has been established. The analysis of program effectiveness on model data included the three models of salt dome: model with small dip of dome flank, model with strong dip of dome flank and model with salt overhange. Analysis of the effect of different parameters on the results of interpretation confirmed that interactive analysis of interpretation results on monitor screen makes it possible to evaluate correctness of parameter selection and correctness of interpretation.

Słowa kluczowe

EN

seismics; tansmission method; salt dome

• Wydawca: Instytut Geofizyki PAN
• Czasopismo: Acta Geophysica Polonica
• Rocznik: 1999
• Tom: Vol. 47, nr 2
• Strony: 203--213
• Opis fizyczny: bibliogr. 5 poz., rys.

Twórcy

autor

Kasina A.

• Akademia Górniczo-Hutnicza 30-059 Kraków Al. Mickiewicza 30,