Method of reservoir compartment analysis using topological structure in 3D earth model
First Claim
1. A method of identifying compartments of a reservoir structure, the method comprising:
- obtaining structural data defining a reservoir structure, wherein the structural data represents a subsurface region containing at least a portion of a reservoir;
generating a topological net based on the structural data in a computer system, the topological net comprising critical points and poly segments connecting the critical points,wherein the generation of the topological net comprises;
(i) defining a real value function that maps the reservoir structure to depth values;
(ii) computing one or more local minima, one or more local maxima, or any combination thereof based on the real value function;
(iii) identifying one of the one or more local minima, one or more local maxima, and any combination thereof as the critical points; and
(iv) representing the critical points in the topological net;
identifying potential compartments of the reservoir structure based on at least the critical points in the topological net in the computer system;
automatically identifying spill or break-over relationships among the potential compartments based on at least the critical points in the topological net; and
displaying or storing a representation based on the identified spill or break-over relationships.
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Abstract
There is provided a system and method for automatically identifying potential compartments of a reservoir based on the reservoirs geological structure. A method of identifying compartments of a reservoir structure includes obtaining structural data corresponding to a geological structure of a reservoir. The method also includes generating a topological net based on the structural data, the topological net comprising critical points and poly segments connecting the critical points. The method also includes identifying potential compartments of the reservoir structure based on the topological net. The method also includes identifying spill or break-over relationships among the potential compartments based on the topological net.
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Citations
24 Claims
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1. A method of identifying compartments of a reservoir structure, the method comprising:
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obtaining structural data defining a reservoir structure, wherein the structural data represents a subsurface region containing at least a portion of a reservoir; generating a topological net based on the structural data in a computer system, the topological net comprising critical points and poly segments connecting the critical points, wherein the generation of the topological net comprises; (i) defining a real value function that maps the reservoir structure to depth values; (ii) computing one or more local minima, one or more local maxima, or any combination thereof based on the real value function; (iii) identifying one of the one or more local minima, one or more local maxima, and any combination thereof as the critical points; and (iv) representing the critical points in the topological net; identifying potential compartments of the reservoir structure based on at least the critical points in the topological net in the computer system; automatically identifying spill or break-over relationships among the potential compartments based on at least the critical points in the topological net; and displaying or storing a representation based on the identified spill or break-over relationships. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of performing a reservoir connectivity analysis comprising:
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obtaining structural data defining a reservoir structure, wherein the structural data represents a subsurface region containing at least a portion of a reservoir; generating a topological net based on the structural data in a computer system, the topological net comprising critical points and poly segments connecting the critical points, wherein the generation of the topological net comprises; (i) defining a real value function that maps the reservoir structure to depth values; (ii) computing one or more local minima, one or more local maxima, or any combination thereof from the real value function; (iii) identifying one of the one or more local minima, one or more local maxima, and any combination thereof as the critical points; and (iv) associating the critical points in the topological net; identifying a potential compartment of the reservoir structure based on at least the critical points in the topological net in the computer system; adding the potential compartment to a reservoir connectivity diagram; comparing measured pressure data with expected pressure data, wherein the expected pressure data is generated based on the reservoir connectivity diagram; and displaying or storing a representation based on the comparison of the measured pressure data with expected pressure data. - View Dependent Claims (16)
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17. A system for analyzing reservoir structure data, comprising:
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a processor; and a non-transitory, computer-readable medium comprising code configured to direct the processor to; obtain structural data corresponding to defining a reservoir structure, wherein the structural data represents a subsurface region containing at least a portion of a reservoir; generate a topological net based on the structural data, the topological net comprising critical points and poly segments connecting the critical points, wherein the generation of the topological net comprises code configured to direct the processor to; (i) define a real value function that maps the reservoir structure to a depth value; (ii) calculate one or more local minima, one or more local maxima, and any combination thereof; (iii) identify one of the one or more local minima, one or more local maxima, and any combination thereof as the critical points; and (iv) associate the critical points in the topological net; identify potential compartments of the reservoir structure based on at least the critical points in the topological net; generate the poly segment by obtaining depth level sets of the structural data from the real value function that maps to depths ranging from minimum depth to maximum depth of the structural data; and display or store a representation based on the identified potential compartments and the topological net. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. A method of modeling compartments in a subsurface region, the method comprising:
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obtaining structural data defining a reservoir structure in the subsurface region; generating a topological net based on the structural data in a computer system, the topological net comprising critical points and poly segments connecting the critical points, wherein the generation of the topological net comprises; (v) defining a real value function that maps the reservoir structure to depth values; (vi) computing one or more local minima, one or more local maxima, or any combination thereof based on the real value function; (vii) identifying one of the one or more local minima, one or more local maxima, and any combination thereof as the critical points; and (viii) representing the critical points in the topological net; identifying potential compartments of the reservoir structure based on at least the critical points in the topological net in the computer system; automatically identifying spill or break-over relationships among the potential compartments based on at least the critical points in the topological net; and constructing a reservoir connectivity diagram based on the identification of the potential compartments and the spill or break-over relationships; displaying the reservoir connectivity diagram.
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Specification