Method for optimizing the working of a deposit of fluid by taking into account a geological and transitory exchange term between matrix blocks and fractures
AssigneeIfp Energies Nouvelles
InventorsBernard BOURBIAUX, Daniela BAUER
Life of this patent
Estimating the term…
Abstract
The invention is a method for optimizing working (EXP) of a deposit of fluid traversed by a network of fractures that involves determining the transitory exchange terms between matrix blocks and fractures (FFA, FFN), for any type of available information (INFO) concerning the network of fractures, regardless of the level of knowledge of the fractured environment.
Claims25
1-7. (canceled)
A method for optimizing working of a deposit of fluid traversed by a network of fractures, in which the deposit is discretized into a set of meshes of information characterizing the network of fractures allowing defining of porous blocks and fractures within a mesh associated with each of the meshes, the information being a known type, the method comprising:
- a) determining a stream of transitory exchanges between the porous blocks and the fractures in each mesh by using software executed on a computer to perform the steps of:
- i) determining a geological and transitory shape function Iv determined by use of the information characterizing the network of fractures, wherein the shape function Iv accounts for the type of information;
- and
- ii) calculating the stream of transitory exchanges is calculated using the shape function Iv;
- b) simulating flows of fluids in the deposit by a flow simulator implemented by use of software executed on a computer and the stream of exchanges;
- and
- c) working of the deposit by using the simulation of the flows of fluids by the flow simulator.
The method as claimed in claim 16, wherein the at least one parameter comprises capillary pressures and relative permeabilities.
The method as claimed in claim 5, wherein the stream of exchanges fp is calculated by a relationship:
- fp=CPmpΔΦp, with C being a geometric coefficient defined by C=ΔA·ΔB·ΔC·IV(X), ΔA, ΔB, ΔC, the dimensions of the mesh, ΔΦp being the potential difference and Pmp a property relating to fluids and to an environment of a matrix.
Dependencies are inferred from the claim text.