Method for point measurement of well by gyroscopic inclinometer

Abstract

The invention discloses a method for point measurement of a well by a gyroscopic inclinometer. The gyroscopic inclinometer with two dual-DOF (degree of freedom) flexible gyroscopes and a dual-quartz accelerometer is fixed on a carrier and extends in the well along with the carrier; data collected by the gyroscopes and the quartz accelerometer are input for calculating an azimuth angle Gama, an inclination angle Alpha and a transverse rolling angle Beta. In the method, the data in the well are collected by the gyroscopes; furthermore, the azimuth angle, the inclination angle and the transverserolling angle of a certain point in the well can be measured by filtering, attitude algorithm and dislocation; the measuring reliability is good, the measuring precision is high and the measuring speed is quick; the method is realized by an embedded computer; the aim of collecting and calculating data underground can be achieved; a well track drawing can be drawn by the measured data, therefore, the obtaining of the drilling well track can be facilitated; and the gyroscope has high sensitivity and good stability, is not interfered by magnetic field, can be used conveniently, and can complete inclination point measurement relaying on measuring the angular rotation velocity of the earth.

Description

technical field The present invention relates to a method for point logging wellbore. Background technique The traditional logging and inclination system mainly uses the fluxgate compass. The magnetic compass plus double plus meter, together with the photoelectric detection system, constitutes the borehole measurement device. The magnetic compass uses the earth's own magnetic field for azimuth alignment, and the main factor affecting the accuracy is the earth's magnetic field. The earth's magnetic field is easily affected by natural iron ore, artificial electromagnetic signals (such as electromagnetic radiation from generators, motors and other equipment). In cased wells, the earth's magnetic field is disturbed and the magnetic compass cannot be used normally. These factors restrict the use of the magnetic compass. SUMMARY OF THE INVENTION In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a method for point...

AI Technical Summary

Problems solved by technology

In cased wells, the earth's magnetic field is disturbed and the magnetic compass cannot be used normally. These factors restrict the use of the magnetic compass