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US 12,710,558 B2Granted
Reflector tracking for waveform data
AssigneeSchlumberger Technology Corporation
InventorNobuyasu Hirabayashi
Life of this patent
Estimating the term…
Abstract
Methods and systems for managing operation of a well are disclosed. The method may include obtaining sonic log data for a geological formation in which the well is positioned. An iterative cross-correlation based reflector tracking process may be performed using the sonic log data to obtain a reflector data package. The reflector data package may include a plurality of points on a reflector and a plurality of dip angles of the reflector for the plurality of points. The reflector data package may be used, at least in part, to operate the well.
Claims12
A method for managing operation of a well, the method comprising:
- disposing a logging tool in the well;
- obtaining sonic log data, via the logging tool, for a geological formation in which the well is positioned;
- prior to performing an iterative cross-correlation based reflector tracking process, obtaining a migrated image of the sonic log data, the migrated image comprising a plurality of traces;
- performing the iterative cross-correlation based reflector tracking process using the sonic log data to obtain a reflector data package, the reflector data package comprising a plurality of points on a reflector and a plurality of dip angles of the reflector for the plurality of points, wherein the iterative cross-correlation based reflector tracking process comprises:
- using an initial point of the plurality of points, the initial point associated with a first trace of the plurality of traces, and the initial point being identified based on an envelope of the first trace;
- performing a cross-correlation between the first trace and at least one proximate trace of the plurality of traces to obtain a set of cross-correlation coefficients;
- and
- obtaining a dip angle of the plurality of dip angles for the initial point using the set of cross-correlation coefficients;
- determining where to install completion components within the well based on the reflector data package, the completion components comprising a perforator;
- and
- perforating the well via the perforator based on the determining where to install the completion components.
8 more elements
A non-transitory machine-readable medium having instructions stored therein, which when executed by a processor, cause the processor to perform operations for managing operation of a well, the operations comprising:
- disposing a logging tool in the well;
- obtaining sonic log data, via the logging tool, for a geological formation in which the well is positioned;
- prior to performing an iterative cross-correlation based reflector tracking process, obtaining a migrated image of the sonic log data, the migrated image comprising a plurality of traces;
- performing the iterative cross-correlation based reflector tracking process using the sonic log data to obtain a reflector data package, the reflector data package comprising a plurality of points on a reflector and a plurality of dip angles of the reflector for the plurality of points, wherein the iterative cross-correlation based reflector tracking process comprises:
- using an initial point of the plurality of points, the initial point associated with a first trace of the plurality of traces, and the initial point being identified based on an envelope of the first trace;
- performing a cross-correlation between the first trace and at least one proximate trace of the plurality of traces to obtain a set of cross-correlation coefficients;
- and
- obtaining a dip angle of the plurality of dip angles for the initial point using the set of cross-correlation coefficients;
- determining where to install completion components within the well based on the reflector data package, the completion components comprising a perforator;
- and
- perforating the well via the perforator.
8 more elements
A data processing system, comprising:
- a processor;
- and
- a memory coupled to the processor to store instructions, which when executed by the processor, cause the processor to perform operations for managing operation of a well, the operations comprising:
- disposing a logging tool in the well;
- obtaining sonic log data, via the logging tool, for a geological formation in which the well is positioned;
- prior to performing an iterative cross-correlation based reflector tracking process, obtaining a migrated image of the sonic log data, the migrated image comprising a plurality of traces;
- performing the iterative cross-correlation based reflector tracking process using the sonic log data to obtain a reflector data package, the reflector data package comprising a plurality of points on a reflector and a plurality of dip angles of the reflector for the plurality of points, wherein the iterative cross-correlation based reflector tracking process comprises:
- using an initial point of the plurality of points, the initial point associated with a first trace of the plurality of traces, and the initial point being identified based on an envelope of the first trace;
- performing a cross-correlation between the first trace and at least one proximate trace of the plurality of traces to obtain a set of cross-correlation coefficients;
- and
- obtaining a dip angle of the plurality of dip angles for the initial point using the set of cross-correlation coefficients;
- determining where to install completion components within the well based on the reflector data package, the completion components comprising a perforator;
- perforating the well via the perforator based on the determining where to install the completion components;
- and
- bonding a casing to a wellbore of the well via a cement based on the determining where to install the completion components.
12 more elements
Dependencies are inferred from the claim text.