WEIGHTING FUNCTION FOR INCLINATION AND AZIMUTH COMPUTATION
A method, system, and computer readable medium is disclosed to estimate a survey parameter (e.g., attitude) for a drilling operation in a subterranean formation. The survey parameter is calculated using multiple methods with the results of the different methods weighted to improve the accuracy at a...
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creator | DITLEFSEN, KEN-VIDAR BOWLER, ADAM BOGATH, CHRISTOPHER C SUGIURA, JUNICHI |
description | A method, system, and computer readable medium is disclosed to estimate a survey parameter (e.g., attitude) for a drilling operation in a subterranean formation. The survey parameter is calculated using multiple methods with the results of the different methods weighted to improve the accuracy at a given attitude of the tool and angular velocity of the sensor package. Results from the different methods are combined based on a weighting function to generate the improved values of inclination and azimuth. Specifically, the values of the weighting function depend, linearly or non-linearly, on the attitude of the tool and quality of the survey data. In one scenario, the attitude of the tool is approximated by the most recently obtained static inclination/azimuth. In addition, the quality of the survey data is approximated by a measure of vibration severity that is represented by the number of good data points based on the roll rate. |
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The survey parameter is calculated using multiple methods with the results of the different methods weighted to improve the accuracy at a given attitude of the tool and angular velocity of the sensor package. Results from the different methods are combined based on a weighting function to generate the improved values of inclination and azimuth. Specifically, the values of the weighting function depend, linearly or non-linearly, on the attitude of the tool and quality of the survey data. In one scenario, the attitude of the tool is approximated by the most recently obtained static inclination/azimuth. 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The survey parameter is calculated using multiple methods with the results of the different methods weighted to improve the accuracy at a given attitude of the tool and angular velocity of the sensor package. Results from the different methods are combined based on a weighting function to generate the improved values of inclination and azimuth. Specifically, the values of the weighting function depend, linearly or non-linearly, on the attitude of the tool and quality of the survey data. In one scenario, the attitude of the tool is approximated by the most recently obtained static inclination/azimuth. In addition, the quality of the survey data is approximated by a measure of vibration severity that is represented by the number of good data points based on the roll rate.</description><subject>EARTH DRILLING</subject><subject>EARTH DRILLING, e.g. DEEP DRILLING</subject><subject>FIXED CONSTRUCTIONS</subject><subject>MINING</subject><subject>OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2015</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLAKd_V09wjx9HNXcAv1cw7x9PdTcPMPUvD0c_bx9HME8x39XBQcozx9Q0M8FJz9fQNCQ8DiPAysaYk5xam8UJqbQcHNNcTZQze1ID8-tbggMTk1L7Uk3jXAyNLI0tDE0NHQmAglAIjmKPQ</recordid><startdate>20151014</startdate><enddate>20151014</enddate><creator>DITLEFSEN, KEN-VIDAR</creator><creator>BOWLER, ADAM</creator><creator>BOGATH, CHRISTOPHER C</creator><creator>SUGIURA, JUNICHI</creator><scope>EVB</scope></search><sort><creationdate>20151014</creationdate><title>WEIGHTING FUNCTION FOR INCLINATION AND AZIMUTH COMPUTATION</title><author>DITLEFSEN, KEN-VIDAR ; BOWLER, ADAM ; BOGATH, CHRISTOPHER C ; SUGIURA, JUNICHI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP2929141A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</language><creationdate>2015</creationdate><topic>EARTH DRILLING</topic><topic>EARTH DRILLING, e.g. DEEP DRILLING</topic><topic>FIXED CONSTRUCTIONS</topic><topic>MINING</topic><topic>OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS</topic><toplevel>online_resources</toplevel><creatorcontrib>DITLEFSEN, KEN-VIDAR</creatorcontrib><creatorcontrib>BOWLER, ADAM</creatorcontrib><creatorcontrib>BOGATH, CHRISTOPHER C</creatorcontrib><creatorcontrib>SUGIURA, JUNICHI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>DITLEFSEN, KEN-VIDAR</au><au>BOWLER, ADAM</au><au>BOGATH, CHRISTOPHER C</au><au>SUGIURA, JUNICHI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>WEIGHTING FUNCTION FOR INCLINATION AND AZIMUTH COMPUTATION</title><date>2015-10-14</date><risdate>2015</risdate><abstract>A method, system, and computer readable medium is disclosed to estimate a survey parameter (e.g., attitude) for a drilling operation in a subterranean formation. The survey parameter is calculated using multiple methods with the results of the different methods weighted to improve the accuracy at a given attitude of the tool and angular velocity of the sensor package. Results from the different methods are combined based on a weighting function to generate the improved values of inclination and azimuth. Specifically, the values of the weighting function depend, linearly or non-linearly, on the attitude of the tool and quality of the survey data. In one scenario, the attitude of the tool is approximated by the most recently obtained static inclination/azimuth. In addition, the quality of the survey data is approximated by a measure of vibration severity that is represented by the number of good data points based on the roll rate.</abstract><oa>free_for_read</oa></addata></record> |
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subjects | EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS |
title | WEIGHTING FUNCTION FOR INCLINATION AND AZIMUTH COMPUTATION |
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