Adjoint-based conditioning of process-based geologic models
First Claim
1. A computer implemented method for correlating data predicted by a process-based model or physics-based model to describe a subsurface region with known data describing the subsurface region, the method comprising:
- obtaining data describing the subsurface region;
estimating model parameters of an initial state of the subsurface region;
predicting data describing a subsequent state of the subsurface region with a computer, wherein the predicting data comprises using the model parameters to simulate with a model the evolution of a channel by modeling dynamics of interplay between channel migration and changing sedimentary environment;
comparing the predicted data with the obtained data by computing an objective function taking into account whether the predicted data represent a discontinuous event, wherein the objective function is defined using the following formulation;
0 Assignments
0 Petitions
Accused Products
Abstract
A method for correlating data predicted by a processor physics-based geologic model to describe a subsurface region with obtained data describing the subsurface region. Data is obtained describing an initial state of the subsurface region. Data describing a subsequent state of the subsurface region is predicted. The predicted data is compared with the obtained data taking into account whether the obtained data or the predicted data represent a discontinuous event. A sensitivity of the predicted data is determined if the predicted data is not within an acceptable range of the obtained data. The data describing the initial state of the subsurface region is adjusted based on the sensitivity before performing a subsequent iteration of predicting data describing the subsequent state of the subsurface region. A representation of the subsurface region based on the data describing the subsequent state of the subsurface region is outputted.
-
Citations
23 Claims
-
1. A computer implemented method for correlating data predicted by a process-based model or physics-based model to describe a subsurface region with known data describing the subsurface region, the method comprising:
-
obtaining data describing the subsurface region; estimating model parameters of an initial state of the subsurface region; predicting data describing a subsequent state of the subsurface region with a computer, wherein the predicting data comprises using the model parameters to simulate with a model the evolution of a channel by modeling dynamics of interplay between channel migration and changing sedimentary environment; comparing the predicted data with the obtained data by computing an objective function taking into account whether the predicted data represent a discontinuous event, wherein the objective function is defined using the following formulation; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A method for producing hydrocarbons from an oil and/or gas field, the method comprising:
-
obtaining data describing an oil and/or gas field; estimating model parameters of an initial state of the subsurface region; predicting data describing a subsequent state of the oil and/or gas field, wherein the predicting data comprises using input model parameters to simulate with a model evolution of a channel by modeling dynamics of interplay between channel migration and changing sedimentary environment; comparing the predicted data with the obtained data by computing an objective function taking into account whether the predicted data represents a discontinuous event, wherein the objective function is defined using the following formulation; - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A computer system that is configured to correlate data predicted by a process-based model or physics-based model to describe a subsurface region with known data describing the subsurface region, the computer system comprising:
-
a processor; and a tangible, machine-readable storage medium that stores tangible, machine-readable instructions for execution by the processor, the tangible, machine-readable instructions comprising; code that is configured to obtain data describing the subsurface region; code that is configured to obtain estimates of input model parameters of an initial state of the subsurface region; code that is configured to predict data describing a subsequent state of the subsurface region, wherein the code is configured to use input model parameters to simulate with a model the evolution of a channel by modeling dynamics of interplay between channel migration and changing sedimentary environment; code that is configured to compare the predicted data with the obtained data by computing an objective function taking into account whether the predicted data represents a discontinuous event, wherein the objective function is defined using the following formulation; - View Dependent Claims (22, 23)
-
Specification