Patent ID: 9110190
Filing Date: 2015-08-18
Classification: G01V,G06F

Abstract:
1. An electronic method for seismic time-lapse characterization of an underground formation, comprising: measuring, via a microprocessor, baseline and monitor seismic surveys of the underground formation; constructing, via the microprocessor, a set of multiple realizations of a static model of the underground formation utilizing co-kriging and co-simulation techniques; simulating, via the microprocessor, the constructed set of multiple realizations to reflect time delays in the underground formation, wherein the simulating includes generating wave propagation models; decomposing, via the microprocessor, the measured baseline and monitor seismic survey data into a four dimensional Clifford Algebraic form; extracting, via the microprocessor, time delays from a matrix of sensor measurement vectors generated based on the four dimensional Clifford Algebraic form; determining, via the microprocessor, extracted time strains based on the time delays extracted from the matrix of sensor measurement vectors by an iterative maximum likelihood technique; determining, via the microprocessor, simulated time strains based on the simulating by comparing wave propagation time delays associated with the wave propagation models generated during the simulating; selecting the realization of the static model that minimizes the differences between the extracted time strains and the simulated time strains; and displaying the selected realization of the static model to a user via a monitor or a hard copy printed document.