Simulation method and apparatus for determining subsidence in a reservoir
US7177764B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 26, 2004 |
| Grant date | Feb 13, 2007 |
| Priority date | — |
| Expiry date | Apr 29, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V11/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A reservoir simulator first estimates rock displacement parameters (u, v, and w) representing rock movement in the x, y, and z directions. When the rock displacement parameters (u, v, w) are determined, “εx,y,z” (the ‘x,y,z elongation strains’) and “γxy,yz,zx” (the ‘shear strains’) are determined since “εx,y,z” and “γxy,yz,zx” are function of “u”, “v”, and “w” When “εx,y,z” and “γxy,yz,zx” are determined, “σx,y,z” (the ‘elastic normal rock stress in x,y,z directions’) and “τxy,yz,xz” (the ‘elastic shear stress’) are determined since “σx,y,z” and “τxy,yz,xz” are a function of “εx,y,z” and “γxy,yz,zx”. When “σx,y,z” and “τxy,yz,xz” are determined, the rock momentum balance differential equations can be solved, since these equations are a function of “σx,y,z” and “τxy,yz,xz”. When any residuals are substantially equal to zero, the estimated rock displacement parameters (u, v, and w) represent ‘accurate rock displacement parameters’ for the reservoir. When the rock momentum balance differential equations are solved, the rock displacement parameters (u, v, w), at an advanced time, are known. These rock displacement parameters (u, v, w) represent and characterize ‘subsidence’ in a seabed…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.