Assessing petroleum reservoir reserves and potential for increasing ultimate recovery
First Claim
1. In a computing system having a processor and system memory and which is configured to receive and analyze data relating to the areal displacement efficiency (EA), vertical displacement efficiency (EI), and pore displacement efficiency (ED) of a petroleum reservoir, a method for determining a recovery deficiency indicator (RDI) for a petroleum reservoir, comprising:
- inputting into the computing system data relating to the areal displacement efficiency (EA) of the petroleum reservoir;
inputting into the computing system data relating to the vertical displacement efficiency (EI) of the petroleum reservoir;
inputting into the computing system data relating to the pore displacement efficiency (ED) of the petroleum reservoir;
the computing system determining, by relating together the areal displacement efficiency (EA), vertical displacement efficiency (EI), and pore displacement efficiency (ED), a recovery efficiency (RE) of the petroleum reservoir;
the computing system determining, based on at least the pore displacement efficiency (ED), an ideal recovery efficiency (IRE) of the petroleum reservoir; and
the computing system determining, by relating the recovery efficiency (RE) with the ideal recovery efficiency (IRE), the recovery deficiency indicator (RDI) for the petroleum reservoir.
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Accused Products
Abstract
Determining a Recovery Deficiency Indicator™ (RDI™) for a petroleum reservoir provides a novel leading indicator and metric that is designed to quickly assess the potential for increases in reserves and ultimate recovery of petroleum from an operating petroleum reservoir. The RDI™ is determined by relating the Recovery Efficiency (RE) and the Ideal Recovery Efficiency (IRE) (e.g., by dividing RE by IRE to obtain RDI™). The Recovery Efficiency (RE) is determined as the product of areal displacement efficiency (EA), vertical displacement efficiency (EV), and pore displacement efficiency (ED). The Ideal Recovery Efficiency (RE) can be determined by empirically assuming that EA and EV equal 100%.
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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 the areal displacement efficiency (EA), vertical displacement efficiency (EI), and pore displacement efficiency (ED) of a petroleum reservoir, a method for determining a recovery deficiency indicator (RDI) for a petroleum reservoir, comprising:
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inputting into the computing system data relating to the areal displacement efficiency (EA) of the petroleum reservoir; inputting into the computing system data relating to the vertical displacement efficiency (EI) of the petroleum reservoir; inputting into the computing system data relating to the pore displacement efficiency (ED) of the petroleum reservoir; the computing system determining, by relating together the areal displacement efficiency (EA), vertical displacement efficiency (EI), and pore displacement efficiency (ED), a recovery efficiency (RE) of the petroleum reservoir; the computing system determining, based on at least the pore displacement efficiency (ED), an ideal recovery efficiency (IRE) of the petroleum reservoir; and the computing system determining, by relating the recovery efficiency (RE) with the ideal recovery efficiency (IRE), the recovery deficiency indicator (RDI) for the petroleum reservoir. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. In a computing system having a processor and system memory and which is configured to receive and analyze data relating to the areal displacement efficiency, vertical displacement efficiency, and pore displacement efficiency of a petroleum reservoir, a method for determining a recovery deficiency indicator for a petroleum reservoir, comprising:
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determining an areal displacement efficiency (EA) of the petroleum reservoir from data obtained or derived from observation wells and/or by drilling and logging new wells in swept areas of the petroleum reservoir and inputting the areal displacement efficiency (EA) into the computing system; determining a vertical displacement efficiency (EI) of the petroleum reservoir from data obtained or derived from observation wells and/or by drilling and logging new wells in swept areas of the petroleum reservoir and inputting the vertical displacement efficiency (EI) into the computing system; determining a pore displacement efficiency (ED) of the petroleum reservoir from data obtained or derived from core samples taken from a plurality of locations throughout the petroleum reservoir and inputting the pore displacement efficiency (ED) into the computing system; the computing system determining a recovery efficiency (RE) of the petroleum reservoir according to the following equation;
RE=EA*EI*ED;the computing system determining an ideal recovery efficiency (IRE) for the petroleum reservoir according to the following equation;
IRE=ED; andthe computing system determining the recovery deficiency indicator (RDI) for the petroleum reservoir according to the following equation;
RDI=RE/IRE.
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17. A method for determining a recovery deficiency indicator (RDI) for a petroleum reservoir, comprising:
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determining an areal displacement efficiency (EA) of the petroleum reservoir from data obtained or derived from observation wells and/or by drilling and logging new wells in swept areas of the petroleum reservoir; determining a vertical displacement efficiency (EI) of the petroleum reservoir from data obtained or derived from observation wells and/or by drilling and logging new wells in swept areas of the petroleum reservoir; determining a pore displacement efficiency (ED) of the petroleum reservoir from data obtained or derived from core samples taken from a plurality of locations throughout the petroleum reservoir; determining, by relating together the areal displacement efficiency (EA), vertical displacement efficiency (EI), and pore displacement efficiency (ED), a recovery efficiency (RE) of the petroleum reservoir; determining, based on at least the pore displacement efficiency (ED), an ideal recovery efficiency (IRE) for the petroleum reservoir; and determining, by relating the recovery efficiency (RE) with the ideal recovery efficiency (IRE), the recovery deficiency indicator (RDI) for the petroleum reservoir. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification