Method of determining subsidence in a reservoir
US6766255B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 15, 2002 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Dec 27, 2022 |
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, “&egr;x,y,z” (the ‘x,y,z elongation strains’) and “&ggr;xy,yz,zx” (the ‘shear strains’) are determined since “&egr;x,y,z” and “&ggr;xy,yz,zx” are function of “u”, “v”, and “w”. When “&egr;x,y,z” and “&ggr;xy,yz,zx” are determined, “&sgr;x,y,z” (the ‘elastic normal rock stress in x,y,z directions’) and “&tgr;xy,yz,zx” (the ‘elastic shear stress’) are determined since “&sgr;x,y,z” and “&tgr;xy,yz,xz” are a function of “&egr;x,y,z” and “&ggr;xy,yz,zx”. When “&sgr;x,y,z” and “&tgr;xy,yz,zx” are determined, the rock momentum balance differential equations can be solved, since these equations are a function of “&sgr;x,y,z” and “&tgr;xy,yz,xz”. When any residuals are substantially equal to zero, the estimated rock disp…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.