Key words: inclinometry, error, gyroscopes, estimation of reserves, geological modeling.
The errors of calculation of absolute marks by different ways are estimated by the example of several fields. It is shown that the use of modern magnetic inclinometers even at high angles of inclination of the wellbore final error of the calculation of absolute marks is not so great as to exclude those wells from structural imagings at geological models creation and performing calculation of hydrocarbons reserves.
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