Method for seismic hydrocarbon system analysis
First Claim
1. A computer-implemented method for analyzing a volume composed of voxels of seismic data representing a subsurface region for presence of a hydrocarbon system or a particular play, comprising:
- partitioning the seismic data volume to form a plurality of segments;
computing a prospectivity score for each voxel, wherein at least two elements are selected, and for each element at least one seismic attribute is selected, and then an element score is calculated for each selected element based on the selected at least one seismic attribute, and the prospectivity score is formed by combining the element scores;
ranking the plurality of segments for presence of a hydrocarbon system or the particular play based at least partly on the prospectivity scores for the voxels of seismic data in each segment; and
wherein the elements are selected from a group consisting of reservoir, seal, trap, source, charge, overburden, maturation, migration, accumulation, and timing, or juxtaposition or coexistence of any two or more of them.
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Abstract
Method for analyzing seismic data representing a subsurface region for presence of a hydrocarbon system or a particular play. Seismic attributes are computed, the attributes being selected to relate to the classical elements of a hydrocarbon system, namely reservoir, seal, trap, source, maturation, and migration. Preferably, the attributes are computed along structural fabrics (1) of the subsurface region, and are smoothed over at least tens or hundreds of data voxels. The resulting geologic attributes (2) are used to analyze the data for elements of the hydrocarbon system and/or recognition of specific plays, and for ranking and annotating partitioned regions (3) of the data volume based on size, quality, and confidence in the prospectivity prediction (5). A catalog (8) of hydrocarbon trap configurations may be created and used to identify potential presence of hydrocarbon traps and/or aid in scoring (4) and ranking partitioned regions as hydrocarbon prospects.
104 Citations
20 Claims
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1. A computer-implemented method for analyzing a volume composed of voxels of seismic data representing a subsurface region for presence of a hydrocarbon system or a particular play, comprising:
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partitioning the seismic data volume to form a plurality of segments; computing a prospectivity score for each voxel, wherein at least two elements are selected, and for each element at least one seismic attribute is selected, and then an element score is calculated for each selected element based on the selected at least one seismic attribute, and the prospectivity score is formed by combining the element scores; ranking the plurality of segments for presence of a hydrocarbon system or the particular play based at least partly on the prospectivity scores for the voxels of seismic data in each segment; and wherein the elements are selected from a group consisting of reservoir, seal, trap, source, charge, overburden, maturation, migration, accumulation, and timing, or juxtaposition or coexistence of any two or more of them. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A computer program product, comprising a computer usable non-transitory medium having a computer readable program code embedded thereon, said computer readable program code adapted to be executed to implement a method for analyzing seismic data representing a subsurface region for presence of a hydrocarbon system or a particular play, comprising:
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partitioning the seismic data volume to form a plurality of segments; computing a prospectivity score for each voxel, wherein at least two elements are selected, and for each element at least one seismic attribute is selected, and then an element score is calculated for each selected element based on the selected at least one seismic attribute, and the prospectivity score is formed by combining the element scores; ranking the plurality of segments for presence of a hydrocarbon system or the particular play based at least partly on prospectivity scores for the voxels of seismic data in each segment; and wherein the elements are selected from a group consisting of reservoir, seal, trap, source, charge, overburden, maturation, migration, accumulation, and timing, or juxtaposition or coexistence of any two or more of them.
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Specification