Assessing petroleum reservoir production and potential for increasing production rate
First Claim
1. In a computing system having a processor and system memory and which is configured to receive and analyze data relating to net actual production gain and a sum of current oil rates for existing producers of a petroleum reservoir, a method for determining the production gain index (PGI) for a producing petroleum reservoir, comprising:
- inputting into the computing system data relating to the net actual production gain of the petroleum reservoir (Σ
Δ
qA) post project development;
inputting into the computing system data relating to the sum of current oil rates for existing producers (Σ
qOld) of the petroleum reservoir prior to project development; and
the computing system determining, by relating the net actual production gain (Σ
Δ
qA) of the petroleum reservoir post project development with the sum of current oil rates (Σ
qOld) of the petroleum reservoir prior to project development, the production gain index (PGI) for the petroleum reservoir.
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Abstract
Determining a production gain index (PGI) for a petroleum reservoir provides a novel leading indicator and metric that is designed to quickly assess the potential for increases in production of petroleum from an operating petroleum reservoir when implementing a recovery plan. The PGI can be determined according to the following equation:
where, ΣΔqA=net actual production gain of the reservoir; and ΣqOld=sum of current oil rates for existing producers. The PGI can also be determined according to the following equation:
PGI=PR×(GPI−1)
where, GPI=the global productivity index of the petroleum reservoir; and PR=the interference factor, which accounts for any losses in aggregate production gain due to well interference.
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Citations
22 Claims
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1. In a computing system having a processor and system memory and which is configured to receive and analyze data relating to net actual production gain and a sum of current oil rates for existing producers of a petroleum reservoir, a method for determining the production gain index (PGI) for a producing petroleum reservoir, comprising:
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inputting into the computing system data relating to the net actual production gain of the petroleum reservoir (Σ
Δ
qA) post project development;inputting into the computing system data relating to the sum of current oil rates for existing producers (Σ
qOld) of the petroleum reservoir prior to project development; andthe computing system determining, by relating the net actual production gain (Σ
Δ
qA) of the petroleum reservoir post project development with the sum of current oil rates (Σ
qOld) of the petroleum reservoir prior to project development, the production gain index (PGI) for the petroleum reservoir. - View Dependent Claims (2, 3)
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4. In a computing system having a processor and system memory and which is configured to receive and analyze data relating to a global productivity index and an interference factor for a petroleum reservoir, a method for determining the production gain index (PGI) for a producing petroleum reservoir, comprising:
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inputting into the computing system data relating to a global productivity index (GPI) of the petroleum reservoir; inputting into the computing system data relating to an interference factor (PR) of the petroleum reservoir; and the computing system determining, by relating the global productivity index (GPI) with the interference factor (PR), the production gain index (PGI) for the petroleum reservoir. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. In a computing system having a processor and system memory and which is configured to receive and analyze data relating to a global productivity index and an interference factor for a petroleum reservoir, a method for determining the production gain index (PGI) for a producing petroleum reservoir, comprising:
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inputting into the computing system data relating to a sum of productivity indices of all producers of the petroleum reservoir post project development (Σ
JNew);inputting into the computing system data relating to a sum of productivity indices of all producers of the petroleum reservoir prior to project development (Σ
JOld);inputting into the computing system data relating to distances (d) between adjacent producers; the computing system determining, by relating the sum of productivity indices of all producers of the petroleum reservoir post project development (Σ
JNew) with the sum of productivity indices of all producers of the petroleum reservoir prior to project development (Σ
JOld), a global productivity index (GPI) of the petroleum reservoir;the computing system determining, by relating together the sum of productivity indices of all producers of the petroleum reservoir post project development (Σ
JNew), the sum of productivity indices of all producers of the petroleum reservoir prior to project development (Σ
JOld), and the distances (d) between adjacent producers, the interference factor (PR) of the petroleum reservoir; andthe computing system determining, by relating the global productivity index (GPI) with the interference factor (PR), the production gain index (PGI) for the petroleum reservoir. - View Dependent Claims (15, 16)
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17. A method for determining the production gain index (PGI) for a producing petroleum reservoir, comprising:
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determining a sum of productivity indices of all producers of the petroleum reservoir post project development (Σ
JNew);determining a sum of productivity indices of all producers of the petroleum reservoir prior to project development (Σ
JOld);determining distances (d) between adjacent producers; determining, by relating the sum of productivity indices of all producers of the petroleum reservoir post project development (Σ
JNew) with the sum of productivity indices of all producers of the petroleum reservoir prior to project development (Σ
JOld), a global productivity index (GPI) of the petroleum reservoir;determining, by relating together the sum of productivity indices of all producers of the petroleum reservoir post project development (Σ
JNew), the sum of productivity indices of all producers of the petroleum reservoir prior to project development (Σ
JOld), and the distances (d) between adjacent producers, the interference factor (PR) of the petroleum reservoir; anddetermining, by relating the global productivity index (GPI) with the interference factor (PR), the production gain index (PGI) for the petroleum reservoir. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification