Patent ID: 9134444
Filing Date: 2015-09-15
Classification: G01V

Abstract:
1. A computer-implemented method of deducing properties of subsurface caverns through seismic information, the method being implemented in a computer system that includes one or more physical processors, the method comprising: obtaining seismic information derived from seismic data captured at or near a subsurface volume of interest that includes a cavern, wherein the cavern is represented in the seismic information as a point diffractor; determining from the seismic information a relationship of a cavern amplitude of the cavern in the seismic information to a background amplitude of the subsurface volume of interest at one or more locations that correspond to the position of the cavern; obtaining parameter values of parameters of the subsurface volume of interest at one or more locations that correspond to the position of the cavern; obtaining proposed property values of properties of the cavern that impact seismic measurements; obtaining a volume model of the subsurface volume of interest in which the subsurface volume of interest has the obtained parameter values around the cavity, and in which the cavern has the proposed property values; performing synthetic seismic analysis on the volume model to obtain synthetic seismic information; and analyzing the proposed property values by comparing a relationship of a model cavern amplitude of the cavern in the synthetic seismic information to a model background amplitude of the subsurface volume of interest with the relationship of the cavern amplitude to the background amplitude.