Generating hydrocarbon reservoir scenarios from limited target hydrocarbon reservoir information
AssigneesInternational Business Machines Corporation, Repsol, S.A.
InventorsSonia Mariette Embid Droz, Ruben Rodriguez Torrado, Mohamed Ahmed Hegazy, Bruno Da Costa Flach, Ulisses T. Mello
Life of this patent
Estimating the term…
Abstract
A system, method and computer program product for generating scenarios of hydrocarbon reservoirs based on limited amount of information on a target hydrocarbon reservoir, and more particularly to automatically supplying missing parameters and uncertainty associated with each supplied parameter allowing to valuating the target hydrocarbon reservoir.
Claims22
A method for generating scenarios of hydrocarbon reservoirs based on limited amount of information on a target hydrocarbon reservoir, said method comprising:
- compile information on the target hydrocarbon reservoir,
- providing a number n of facies, wherein n comprises an integer between 1 and 8, in the domain of the scenario modeling the target hydrocarbon reservoir, wherein each facies Fi, i=1 . . . n, is modeled by its partial rate fi, and a normal distribution of the porosity having a mean value φi and the cutoff values φimin and φimax for a predetermined threshold such that the area of the tail of the normal distribution is deemed to be neglectible beyond such threshold, subject to the following restrictions:
- φ
- _
- i
- <
- φ
- _
- i
- +
- 1
-
- i
- =
- 1
-
-
- …
-
-
- n
- -
- 1
- φ
- _
- i
- =
- (
- φ
- i
- max
- +
- φ
- i
- min
- )
- /
- 2
- ∑
- i
- =
- 1
- n
-
-
- f
- i
- =
- 1
- determining φrefmin, φrefmax, and the φref values,
- determining fi, φimax, φimin, i=1 . . . n as the solution of a minimization problem wherein the cost function is defined by the expression
- Min
- (
-
- φ
- left
- min
- -
- φ
- ref
- min
-
- +
-
- φ
- _
- ref
- -
- ∑
- i
- =
- 1
- n
-
-
- f
- i
-
- φ
- _
- i
-
- +
-
- φ
- right
- max
- -
- φ
- ref
- max
-
- )
- wherein φleftmin and φrightmax are defined by the condition
- φleftmin=Min(φimin);
- i=1, . . . , n
- φrightmax=Max(φimax);
- i=1, . . . , n;
- generating a plurality of three-dimensional scenarios having a three-dimensional domain and the shape of the n facies using a a multipoint statistical method, wherein multipoint statistical method is restricted to the number of facies n, the partial rates of facies fi, i=1 . . . n.
A data processing system for generating scenarios of hydrocarbon reservoirs based on limited amount of information on a target hydrocarbon reservoir, said data processing system comprising:
- means for compiling information on the target hydrocarbon reservoir,
- means for providing a number n of facies comprising an integer between 1 and 8, in the domain of the scenario modeling the target hydrocarbon reservoir, wherein each facies Fi, i=1 . . . n, is modeled by its partial rate fi, and a normal distribution of the porosity having a mean value φi and the cutoff values φimin and φimax for a predetermined threshold such that the area of the tail of the normal distribution is deemed to be neglectible beyond such threshold, subject to the following restrictions:
- φ
- _
- i
- <
- φ
- _
- i
- +
- 1
-
- i
- =
- 1
-
-
- …
-
-
- n
- -
- 1
- φ
- _
- i
- =
- (
- φ
- i
- max
- +
- φ
- i
- min
- )
- /
- 2
- ∑
- i
- =
- 1
- n
-
-
- f
- i
- =
- 1
- means for determining φrefmin, φrefmax, and the φref values,
- means for determining fi, φi, φimax, φimin, i=1 . . . n as the solution of a minimization problem wherein the cost function is defined by the expression
- Min
- (
-
- φ
- left
- min
- -
- φ
- ref
- min
-
- +
-
- φ
- _
- ref
- -
- ∑
- i
- =
- 1
- n
-
-
- f
- i
-
- φ
- _
- i
-
- +
-
- φ
- right
- max
- -
- φ
- ref
- max
-
- )
- wherein φleftmin and φrightmax are defined by the condition
- φleftmin=Min(φimin);
- i=1, . . . , n
- φrightmax=Max(φimax);
- i=1, . . . , n;
- means for multipoint statistical analysis for generating a plurality of three-dimensional scenarios having a three-dimensional domain and the shape of the n facies, said means for multipoint statistical analysis being restricted to the number of facies n, and the partial rates of facies fi, i=1 . . . n.
A computer program product for generating hydrocarbon reservoirs scenarios based on limited target hydrocarbon reservoir information, said computer program product comprising a computer usable medium having computer readable program code stored thereon, said computer readable program code comprising:
- computer program code means for compiling information on the target hydrocarbon reservoir,
- computer program code means for providing a number n of facies comprising an integer between 1 and 8, in the domain of the scenario modeling the target hydrocarbon reservoir, wherein each facies Fi, i=1 . . . n, is modeled by its partial rate fi, and a normal distribution of the porosity having a mean value φi and the cutoff values φimin and φimax for a predetermined threshold such that the area of the tail of the normal distribution is deemed to be neglectible beyond such threshold, subject to the following restrictions:
- φ
- _
- i
- <
- φ
- _
- i
- +
- 1
-
- i
- =
- 1
-
-
- …
-
-
- n
- -
- 1
- φ
- _
- i
- =
- (
- φ
- i
- max
- +
- φ
- i
- min
- )
- /
- 2
- ∑
- i
- =
- 1
- n
-
-
- f
- i
- =
- 1
- computer program code means for determining φrefmin, φrefmax, and the φref values,
- computer program code means for determining fi, φi, φimax, φimin, i=1 . . . n as the solution of a minimization problem wherein the cost function is defined by the expression
- Min
- (
-
- φ
- left
- min
- -
- φ
- ref
- min
-
- +
-
- φ
- _
- ref
- -
- ∑
- i
- =
- 1
- n
-
-
- f
- i
-
- φ
- _
- i
-
- +
-
- φ
- right
- max
- -
- φ
- ref
- max
-
- )
- wherein φleftmin and φrightmax are defined by the condition
- φleftmin=Min(φimin);
- i=1, . . . , n
- φrightmax=Max(φimax);
- i=1, . . . , n;
- computer program code means for multipoint statistical analysis for generating a plurality of three-dimensional scenarios having a three-dimensional domain and the shape of the n facies, said means for multipoint statistical analysis being restricted to the number of facies n, and the partial rates of facies fi, i=1 . . . n.
Dependencies are inferred from the claim text.