Claims
- 1. In a method of utilizing reservoir simulator software to determine subsidence resulting from the withdrawal of fluids from a subterranean reservoir by solving a set of failure criterion equations which comprise the residuals and any derivatives, to determine a set of rock plastic displacements, the improvement comprising coupling changes in rock pore volume to stress utilizing a tabulated rock compaction curve supplied by the reservoir simulator and the rock balance equation
- 2. A program storage device readable by a machine and tangibly embodying a program of instructions executable by the machine to perform the method of claim 1.
- 3. A method of calculating the three dimensional stress field around either a single geological fault or a plurality of geological faults comprising the steps of balancing the forces normal to the fault across the fault plane defining a fault sheer stiffness ks as a property of the fault; and calculating shear stress on the fault plane in accordance with the equation
- 4. The method of claim 3 where shear stiffness is set to
- 5. A program storage device readable by a machine and tangibly embodying a program of instructions executable by the machine to perform the method of claim 3.
- 6. In a method of utilizing reservoir simulator software to determine subsidence resulting from the withdrawal of fluids from a subterranean reservoir by solving a set of failure criterion equations which comprise the residuals and any derivatives, to determine a set of rock plastic displacements, the improvement comprising an equilibration technique for initialization of stresses and pore volumes comprising the steps of applying traction boundary conditions at the surface of a gridded reservoir and thereafter finding a rock state that satisfies the equation
- 7. A program storage device readable by a machine and tangibly embodying a program of instructions executable by the machine to perform the method of claim 6.
Priority Claims (1)
Number |
Date |
Country |
Kind |
0017227.0 |
Jul 2000 |
GB |
|
CROSS REFERENCE TO RELATED APPLICATION
[0001] The present application is a continuation in part of co-pending application Ser. No. 10/070,510, filed Aug. 15, 2002 and entitled METHOD OF DETERMINING SUBSIDENCE IN A RESERVOIR and of International Application No. PCT/GB01/03042, filed Jul. 6, 2001, having the same title.
Continuations (1)
|
Number |
Date |
Country |
Parent |
10070510 |
Aug 2002 |
US |
Child |
10832129 |
Apr 2004 |
US |