US 12,535,618 B2Granted

Method for modelling the formation of a sedimentary area by simulating tidal current-induced particle transport

AssigneeTotalenergies Onetech

InventorsGérard Massonnat, Charles Danquigny

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Abstract

A method for simulating the evolution of a geological gridded model of an area comprising a plurality of cells, over a predetermined period of time T, comprising: a) assigning a water depth to each cell, b) determining, for each cell, a direction and velocity of a water current, c) introducing a number of particles in the model, d) transporting each particle based on the direction and velocity of the current, and e) updating the model according to the transport of each particle, wherein the current is a tidal current, comprising alternate phases of rising tide current and falling tide current, simulating the evolution of the model over the period of time T comprises iterating steps a. to e. a number of times equal to 2k, each iteration of steps a. to e. corresponds to simulating the evolution of the model over a period of time T/2k, each iteration of step b. is performed the rising tide or falling tide current, and two successive iterations of step b. are performed for each one of the rising tide current and falling tide current.

A computer-implemented method for modelling a formation of a sedimentary area and in view of operating a geological reservoir of the sedimentary area, the method comprising:

simulating an evolution of a geological gridded model of the sedimentary area, comprising a plurality of cells, over a predetermined period of time T, said simulating comprising:
a. assigning a water depth to each cell of the geological gridded model,
b. determining, for each cell of the geological gridded model, a direction and velocity of a water current,
c. introducing a number of particles in the geological gridded model,
d. transporting each introduced particle in the geological gridded model based on the computed direction and velocity of the water current, and
e. updating the geological gridded model of the area according to the transport of each introduced particle,
f. simulating the evolution of the geological gridded model of the sedimentary area according to the updated geological gridded model of the area over the period of time T, and
g. modelling the formation of the sedimentary area according to the evolution of the geological gridded model to produce a modelled sedimentary area,
wherein:
the water current is a tidal current, comprising alternate phases of rising tide current and falling tide current,
the simulation of the evolution of the geological gridded model over the predetermined period of time T comprises iterating steps a. to e. a number of times equal to 2k where k is an integer superior or equal to 1, where each iteration of steps a. to e. corresponds to simulating the evolution of the geological gridded model over a period of time T/2k,
each iteration of step b. is performed for one of the rising tide current or falling tide current, and
two successive iterations of step b. are performed respectively for one and the other of the rising tide current and falling tide current, and
operating the geological reservoir of the sedimentary area using the modelled sedimentary area.

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Abstract

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