وارون سازی AVO

A CDP gather was checked for our hypothesis. For this reason an iterative and linearized inversion algorithm carried out in the x-t domain has been applied to a CDP gather. Sonic log from well ipac A#۱ of Aboozar field located close to the seismic line is used to generate the initial starting model for the inversion: other necessary logs are created by sonic log. It was tested the geologically realistic that the starting model have an accurate impedance structure that the prospective pay zone will have mechanical properties consistent with the presence or absence of hydrocarbons. The inversion, performed with starting model in pay zones having a Poisson’s ratio of ۰.۱۶ appropriate with hydrocarbon saturation in the target zone, there is convergence from the initial to the real seismic gather.

After inversion target divided into ۳ zones of different poison ratio ۰.۱۸, ۰.۲۵ and ۰.۴ that indicate gas,oil and water zones respectively