US3702009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simulation of pressure behavior in petroleum reservoirs
Assignee: ConocoPhillips Co
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Filing: 1970-10-23
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Granted: 1972-10-31
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Expires: 1990-10-23
Abstract
Abstract A method for formulating a simple model in simulation of pressure behavior in a petroleum reservoir, the method consisting of utilization of electronic data processing apparatus for performing a novel computational approach to establishment of unknown pressure quantities as deduced from probabilities of known parameters. The method utilizes a variation on the Monte Carlo or Random Walk technique, a variation known as the Exodus modification, which enables stochastic simulation of a petroleum reservoir in terms of its pressure behavior and patterns throughout.
Inventors
- 👤 David E Baldwin Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:39
CPC Classifications
G; G06; G06F; G06F17/00; G06F17/10; G06F17/11; G06F17/13; G06F17/18; G06F30/00; G06F30/20; G06F30/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
213 words
The method of operating a general purpose digital computer for simulation of pressure behavior in petroleum reservoirs, comprising the steps of: equating said reservoir to a volumetric grid system of unit cubic portions as represented between plural matrix index points; entering data for all boundary values, the source value, and probability values for each index of said plural index points; providing data input and recognition of index points describing the particular point equatable to a source position where solution is desired; entering input of a plurality of walkers at a point reference to the source index point; entering data which equates the initial source value to a term proportional to actual reservoir pressure; collecting and evaluating data for each of the interior index points thereafter to distribute walkers to the appropriate nodal index point to derive a count for the percentage number of walkers still remaining in the interior index portion; testing to ascertain if more than a pre-determined number of said walkers have reached a boundary index portion, and tallying the sum of interior index portion contributions plus boundary portion contribustions when the test is affirmative; and ascertaining whether or not all index points at which the solution is desired have been computed and, if affirmative, printing out the resulting probability enumeration.
Claim 2
Independent Claim
213 words
The method of operating a general purpose digital computer for simulation of pressure behavior in petroleum reservoirs, comprising the steps of: equating said reservoir to a volumetric grid system of unit cubic portions as represented between plural matrix index points; entering data for all boundary values, the source value, and probability values for each index of said plural index points; providing data input and recognition of index points describing the particular point equatable to a source position where solution is desired; entering input of a plurality of walkers at a point reference to the source index point; entering data which equates the initial source value to a term proportional to actual reservoir pressure; collecting and evaluating data for each of the interior index points thereafter to distribute walkers to the appropriate nodal index point to derive a count for the percentage number of walkers still remaining in the interior index portion; testing to ascertain if more than a pre-determined number of said walkers have reached a boundary index portion, and tallying the sum of interior index portion contributions plus boundary portion contribustions when the test is affirmative; and ascertaining whether or not all index points at which the solution is desired have been computed and, if affirmative, printing out the resulting probability enumeration.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |