SYSTEMS AND METHODS FOR WELL DATA COMPRESSION
First Claim
1. A method for generating a well log from a downhole tool positioned in a wellbore penetrating a subterranean formation, said method comprising:
- determining a data transmission bandwidth associated with said wellbore available to said downhole tool;
identifying a plurality of events in a data stream of said downhole tool;
determining values associated with said plurality of events;
determining a portion of said data transmission bandwidth to be available for data transmission after a bandwidth for transmission of values associated with said plurality of events is deducted from said data transmission bandwidth;
selecting data points from said data stream, said data points being selected as a function of said portion of said data transmission bandwidth to be available for data transmission;
determining values associated with the selected data points;
transmitting to a surface system the values associated with said plurality of events, and with said selected data points; and
incorporating the transmitted values into the well log.
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Accused Products
Abstract
Systems and methods in which data compression techniques are utilized to fill a predetermined channel capacity are shown. According to one configuration, event data points within test data are selected for communication via the data communication channel and a data decimator is utilized to identify other data points within the test data to fill or substantially fill the predetermined channel capacity. The foregoing data decimator may employ one or more variables for selecting data for communication, wherein one or more of the variables are preferably adjusted in decimator iterations to select an optimum or otherwise desirable subset of data for communication. Data decimators may additionally or alternatively implement a suitable “growth” function to select the particular data for communication and/or the amount of data communicated.
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Citations
33 Claims
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1. A method for generating a well log from a downhole tool positioned in a wellbore penetrating a subterranean formation, said method comprising:
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determining a data transmission bandwidth associated with said wellbore available to said downhole tool;
identifying a plurality of events in a data stream of said downhole tool;
determining values associated with said plurality of events;
determining a portion of said data transmission bandwidth to be available for data transmission after a bandwidth for transmission of values associated with said plurality of events is deducted from said data transmission bandwidth;
selecting data points from said data stream, said data points being selected as a function of said portion of said data transmission bandwidth to be available for data transmission;
determining values associated with the selected data points;
transmitting to a surface system the values associated with said plurality of events, and with said selected data points; and
incorporating the transmitted values into the well log. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 30, 31)
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17. A method for generating a well log from a downhole tool positioned in a wellbore penetrating a subterranean formation, said method comprising:
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acquiring data associated with an operation of said downhole tool;
identifying a plurality of events associated with the operation of said downhole tool;
selecting data points for transmission by said downhole tool, said data points being selected as a function of said plurality of events and a growth function;
determining values associated with said plurality of events and said data points for transmission by said downhole tool;
transmitting to a surface system said determined values; and
incorporating the transmitted data into the well log. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 32, 33)
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Specification