Method to convert seismic traces into petrophysical property logs
First Claim
1. A method of converting seismic traces to petrophysical properties comprising:
- (a) deriving a combined log seismic response filter from at least one petrophysical log in a well and at least one seismic trace substantially near at least one well;
(b) convolving the combined log seismic response filter to convert the seismic traces to at least one log of petrophysical properties;
(c) outputting at least one log of petrophysical properties from step (b).
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Abstract
A method to convert seismic traces to petrophysical properties is disclosed. One embodiment of the method comprises (a) deriving a combined log seismic response from at least one petrophysical log from a well and at least one seismic trace substantially near the well, (b) convolving the combined log seismic response filter with each seismic trace to convert the seismic traces to logs of petrophysical properties, (c) outputting the petrophysical properties. Equations to derive the combined log seismic response and to convolve the combined seismic response filter are disclosed. The method may be used to output the petrophysical data as a two-dimensional cross-section or as a three-dimensional volume cube.
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Citations
15 Claims
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1. A method of converting seismic traces to petrophysical properties comprising:
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(a) deriving a combined log seismic response filter from at least one petrophysical log in a well and at least one seismic trace substantially near at least one well; (b) convolving the combined log seismic response filter to convert the seismic traces to at least one log of petrophysical properties; (c) outputting at least one log of petrophysical properties from step (b). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 14, 15)
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10. A method of converting a three-dimensional seismic volume cube of an area to a three-dimensional petrophysical property volume cube comprising:
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(a) obtaining a three-dimensional seismic volume cube from a seismic survey of the area; (b) drilling a well in the area; (c) obtaining at least one petrophysical log from the well drilled in the area; (d) deriving a combined log seismic response (CLSR) filter from a log and at least one seismic trace near the well; (e) converting seismic wiggles traces to petrophysical properties by convolving the CLSR filter with each seismic trace; (f) Outputting the petrophysical properties as a three-dimensional property volume cube. - View Dependent Claims (11, 12, 13)
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Specification