Method for the development of a fluid deposit traversed by fractures by means of a flow simulation based on an exchange flow and a corrective factor
AssigneeIfp Energies Nouvelles
InventorsBernard Bourbiaux, Didier Yu Ding
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Abstract
The present invention relates to a method for optimizing a fluid deposit traversed by a fracture network. For this method, the deposit is discretized in a meshed representation, a “dual medium” approach is used, and the exchange flows are determined between the meshes, together with corrective factors. The corrective factors are dependent on the initial pressure and the minimum production pressure of the deposit. The fluid flows in the deposit are simulated by means of these flows and these corrective factors.
Claims20
A method for development of a fluid deposit traversed by a fracture network, based on measurements of properties relating to the fluid deposit and a meshed representation of the fluid deposit which is constructed with each mesh of the representation comprising a matrix medium and a fractured medium, and in which an initial pressure of the fluid deposit and a minimum production pressure of the fluid deposit are known, comprising:
- a) determining for each mesh an exchange flow that takes place between the matrix medium and the fractured medium;
- b) determining exchange flow corrective factors respectively calculated for longer term pseudo-permanent exchange regimes and shorter term transient exchange regimes for correcting the exchange flow by use of the initial pressure of the fluid deposit and the minimum production pressure of the fluid deposit with the exchange flow corrective factors of the exchange flow being obtained by a formulation of pseudo-pressure by formulation of flow equations of the fluid deposit which are determined for the longer term pseudo-permanent exchange regimes and shorter term transient exchange regimes;
- c) simulating flows of the fluid in the fluid deposit with a flow simulator, using the exchange flow and the corrective factors and wherein the exchange flow used for the simulation of the flows is multiplied by the exchange flow corrective factors;
- and
- d) optimizing the development of the fluid deposit by use of the simulation of the flows in the fluid deposit with the flow simulator;
- and wherein
- the longer term pseudo-permanent exchange regimes and shorter term transient exchange regimes are determined from an initial pressure of the fluid deposit and a final pressure of wells drilled during the development of the fluid deposit and transitioning between the longer term pseudo-permanent exchange regimes and shorter term transient exchange regimes which utilizes calculation of an average value of the longer term pseudo-permanent exchange regimes and shorter term transient exchange regimes.
A computer program product stored non transiently on computer readable medium which is executed by a processor, which performs a method used for developing a fluid deposit traversed by a fracture network based on measurements of properties relating to the fluid deposit, a meshed representation of the fluid deposit is constructed with each mesh of the representation comprising a matrix medium and a fractured medium, and in which an initial pressure of the fluid deposit and a minimum production pressure of the fluid deposit are known, comprising;
- a) determining for each mesh an exchange flow that takes place between the matrix medium and the fractured medium;
- b) determining exchange flow corrective factors respectively calculated for longer term pseudo-permanent exchange regimes and shorter term transient exchange regimes for correcting the exchange flow by use of the initial pressure of the fluid deposit and the minimum production pressure of the fluid deposit with the exchange flow corrective factors of the exchange flow being obtained by a formulation of pseudo-pressure by formulation of flow equations of the fluid deposit which are determined for the longer term pseudo-permanent exchange regimes and shorter term transient exchange regimes;
- c) simulating flows of the fluid in the fluid deposit with a flow simulator, using the exchange flow and the corrective factors and wherein the exchange flow used for the simulation of the flows is multiplied by the exchange flow corrective factors;
- and
- d) optimizing the development of the fluid deposit by use of the simulation of the flows in the fluid deposit with the flow simulator;
- and wherein
- the longer term pseudo-permanent exchange regimes and shorter term transient exchange regimes are determined from an initial pressure of the fluid deposit and a final pressure of wells drilled during the development of a fluid deposit and transitioning between the longer term pseudo-permanent exchange regimes and shorter term transient exchange regimes which utilizes calculation of an average value of the longer term pseudo-permanent exchange regimes and shorter term transient exchange regimes.
A method for the development of a fluid deposit traversed by a fracture network based on measurements of properties relating to the fluid deposit, a meshed representation of the fluid deposit being constructed with each mesh of the representation comprising a matrix medium and a fractured medium, and an initial pressure of the fluid deposit and a minimum production pressure of the fluid deposit being known comprising steps of:
- a) determining for each mesh an exchange flow that takes place between the matrix medium and the fractured medium;
- b) determining exchange flow corrective factors respectively calculated for longer term pseudo-permanent exchange regimes and shorter term transient exchange regimes for correcting the exchange flow by use of the initial pressure of the fluid deposit and the minimum production pressure of the fluid deposit with the exchange flow corrective factors of the exchange flow being obtained by a formulation of pseudo-pressure by formulation of flow equations of the fluid deposit which are determined for the longer term pseudo-permanent exchange regimes and shorter term transient exchange regimes;
- c) simulating flows of the fluid in the fluid deposit with a flow simulator, using the exchange flow and the corrective factors and wherein the exchange flow used for the simulation of the flows is multiplied by the exchange flow corrective factors;
- and
- d) optimizing the development of the fluid deposit by use of the simulation of the flows in the fluid deposit with the flow simulator;
- and wherein
- the longer term pseudo-permanent exchange regimes and shorter term transient exchange regimes are determined from an initial pressure of the fluid deposit and a final pressure of wells drilled during the development of a fluid deposit and transitioning between the longer term pseudo-permanent exchange regimes and shorter term transient exchange regimes which utilizes calculation of an average value of the longer term pseudo-permanent exchange regimes and shorter term transient exchange regimes.
Dependencies are inferred from the claim text.