System and method for automated reservoir targeting
First Claim
1. A computer-implemented method of reservoir targeting, comprising:
- (a) building, from seismic data, a three dimensional model of a reservoir;
(b) triangulating the three dimensional model of the reservoir to create a schematic model comprising a three dimensional grid of cells;
(c) filtering the schematic model to eliminate cells with attribute values below a threshold and/or do not meet other predetermined selection criteria;
(d) determining a set of contiguous cells for at least one selected X and Y location in the schematic model, wherein the set of contiguous cells is determined by moving a window of a plurality of cells to select a window of a plurality of cells that has a maximum value of a sum of values of an attribute of interest, wherein the sum is taken over the cells in the selected window, the plurality of cells having the maximum value of the sum being the most desirable cells for the at least one selected X and Y location;
(e) recording a center of location of the most desirable cells along with an area of the cells and the maximum value of the sum of values of the attribute of interest for the at least one selected X and Y location in a first matrix, wherein the first matrix is a two dimensional matrix;
(f) for each cell in the first matrix, taking each cell as a selected cell, calculating a distance weighted sum of values in the first matrix of all the cells within a multiple of a spacing radius from a center point of the selected cell, wherein a weight is selected to give more weight to cells located closer to the selected cell and less weight to cells located further from the selected cell and entering the distance weighted sum in a second matrix as an accumulated value for the selected cell;
(g) selecting the cell location having a maximum accumulated value in the second matrix as a target location;
(h) setting the value of the selected cell at the target location in the second matrix and the value of all the cells in the second matrix, within a multiple of the spacing radius, to zero in the first matrix;
(i) repeating steps (f) to (h) until a specified number of target locations are identified or there are no more cells with an accumulated value greater than zero.
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Abstract
Methods and systems for reservoir targeting, the systems implementing methods comprising filtering a plurality of values in a three-dimensional model to eliminate values which are below a threshold to create a filtered three-dimensional model; developing a first matrix from the filtered three-dimensional model representing a two-dimensional model of the reservoir, wherein the first matrix includes a plurality of cell center locations, cell areas, and the plurality of values; developing a second matrix from the first matrix using a distance-weighted sum of the plurality of values; and selecting target locations from the second matrix based on the distance-weighted sum of the plurality of values.
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Citations
12 Claims
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1. A computer-implemented method of reservoir targeting, comprising:
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(a) building, from seismic data, a three dimensional model of a reservoir; (b) triangulating the three dimensional model of the reservoir to create a schematic model comprising a three dimensional grid of cells; (c) filtering the schematic model to eliminate cells with attribute values below a threshold and/or do not meet other predetermined selection criteria; (d) determining a set of contiguous cells for at least one selected X and Y location in the schematic model, wherein the set of contiguous cells is determined by moving a window of a plurality of cells to select a window of a plurality of cells that has a maximum value of a sum of values of an attribute of interest, wherein the sum is taken over the cells in the selected window, the plurality of cells having the maximum value of the sum being the most desirable cells for the at least one selected X and Y location; (e) recording a center of location of the most desirable cells along with an area of the cells and the maximum value of the sum of values of the attribute of interest for the at least one selected X and Y location in a first matrix, wherein the first matrix is a two dimensional matrix; (f) for each cell in the first matrix, taking each cell as a selected cell, calculating a distance weighted sum of values in the first matrix of all the cells within a multiple of a spacing radius from a center point of the selected cell, wherein a weight is selected to give more weight to cells located closer to the selected cell and less weight to cells located further from the selected cell and entering the distance weighted sum in a second matrix as an accumulated value for the selected cell; (g) selecting the cell location having a maximum accumulated value in the second matrix as a target location; (h) setting the value of the selected cell at the target location in the second matrix and the value of all the cells in the second matrix, within a multiple of the spacing radius, to zero in the first matrix; (i) repeating steps (f) to (h) until a specified number of target locations are identified or there are no more cells with an accumulated value greater than zero. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A computer-readable medium having computer-executable instructions which when executed on a computer perform a process for reservoir targeting, the process comprising:
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(a) building, from seismic data, a three dimensional model of a reservoir; (b) triangulating the three dimensional model of the reservoir to create a schematic model comprising a three dimensional grid of cells; (c) filtering the schematic model to eliminate cells with attribute values below a threshold and/or do not meet other predetermined selection criteria; (d) determining a set of contiguous cells for at least one selected X and Y location in the schematic model, wherein the set of contiguous cells is determined by moving a window of a plurality of cells to select a window of a plurality of cells that has a maximum value of a sum of values of an attribute of interest, wherein the sum is taken over the cells in the selected window, the plurality of cells having the maximum value of the sum being the most desirable cells for the at least one selected X and Y location; (e) recording a center of location of the most desirable cells along with an area of the cells and the maximum value of the sum of values of the attribute of interest for the at least one selected X and Y location in a first matrix, wherein the first matrix is a two dimensional matrix; (f) for each cell in the first matrix, taking each cell as a selected cell, calculating a distance weighted sum of values in the first matrix of all the cells within a multiple of a spacing radius from a center point of the selected cell, wherein a weight is selected to give more weight to cells located closer to the selected cell and less weight to cells located further from the selected cell and entering the distance weighted sum in a second matrix as an accumulated value for the selected cell; (g) selecting the cell location having a maximum accumulated value in the second matrix as a target location; (h) setting the value of the selected cell at the target location in the second matrix and the value of all the cells in the second matrix, within a multiple of the spacing radius, to zero in the first matrix; (i) repeating steps (f) to (h) until a specified number of target locations are identified or there are no more cells with an accumulated value greater than zero. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification