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METHOD TO DETECT DEVIATIONS FROM A WELLPLAN WHILE DRILLING IN THE PRESENCE OF MAGNETIC INTERFERENCE
METHOD TO DETECT DEVIATIONS FROM A WELLPLAN WHILE DRILLING IN THE PRESENCE OF MAGNETIC INTERFERENCE
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机译:在存在电磁干扰的情况下从钻井中检测钻井计划中的偏差的方法
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摘要
A method for drilling a wellbore to assure the avoidance of a substantially adjacent known magnetic source comprising the steps of obtaining survey data for the path or trajectory of a known magnetic source; preparing a wellplan comprising a path or trajectory for a second wellbore to be drilled, from the survey data and the wellplan, computing expected values of one or more parameters of the magnetic field to be encountered along a second wellbore during drilling operations, in association with drilling a second wellbore, measuring components of a magnetic field encountered and computing one or more magnetic field parameters at a series of survey points along the wellbore path or trajectory; and determining if measured values differ systematically from expected values, thereby indicating a deviation from the planned wellpath.
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