Method of determining boundary interface changes in a...

Data processing: structural design – modeling – simulation – and em – Simulating nonelectrical device or system – Fluid

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C702S006000

Reexamination Certificate

active

07047170

ABSTRACT:
A method of determining changes in the boundary interface in a sub-surface oil reservoir between the to-be-recovered oil and a driveout fluid, such as steam, uses time-displaced gravity gradient measurements to provide an indication of the changes in the gravity gradient over time. The measured data are subject to simulated annealing optimization to find the global minimum that best represents the observed values within the solution space. The optimization process includes establishing an appropriately constrained model of the oil reservoir and a quantized set of mathematically related parameters that define the model. Successive models are perturbed and evaluated from a figure of merit standpoint until a global minimum that best describes the measured time-lapse data is found.

REFERENCES:
patent: 4916616 (1990-04-01), Freedman et al.
patent: 6005916 (1999-12-01), Johnson et al.
patent: 6125698 (2000-10-01), Schweitzer et al.
patent: 6212952 (2001-04-01), Schweitzer et al.
Nagihara et al, “Three-dimensional Graivity Inversion Based on the Simulated Annealing Algorithm for Constraining Diapiric Roots of Salt Canopies”, University of Houston, 1999.
Lumley, David E., “4-D Seismic Monitoring of Reservoir Fluid-Flow Processes”, SPIE Conference, 1994.
Integrated Geophysics Corporation, “Gravity Gadiometry in Natural Resource Exploration”, Footnotes on Interpretation, vol. 4, No. 1, Jun. 1997.
Maisano et al., “Experimental Investigation of Graivity-Induced Concentration Gradients in Critical Mixtures” 1976 J. Phys. A: Math. Gen., vol. 9, No. 12 Great Britain. p. 2149-2158.
Davidson et al., “Simulation of the Optimal Combination of Wasate Treatment and Spatially Distributed Discharge of Effluent using Pontryagin's Minimum Principle” Jul. 1974 Annales-de-I-Association-Internationale-pour-le-Calcul-Analogique. p. 15-30.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method of determining boundary interface changes in a... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of determining boundary interface changes in a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of determining boundary interface changes in a... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3609171

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.