Sidetracking well bore track and window size identification method, device and equipment and medium

Abstract

The embodiments of the invention disclose a sidetracking well bore track and window size identification method, device and equipment and a medium. The sidetracking well bore track and window size identification method comprises the following steps that corresponding actual response signals are received by using eccentric probes in an eccentric probe array; corresponding response signal equations are constructed according to the actual response signals corresponding to the eccentric probes and the response signal expression, and all the response signal equations are connected in parallel to form an equation set to be solved; a space geometrical relational expression used for representing the underground arrangement position of each eccentric probe is substituted into the equation set to be solved and solving is carried out to obtain the distance and direction of the center of underground detection equipment where the eccentric probe array is located at different underground depth positions deviating from an original old casing well shaft; and based on the arrangement position of each eccentric probe in the well, according to the distance between a new casing well shaft and the original old casing well shaft, and in combination with the outer diameter of the new casing, the size of a sidetracking well window is determined.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of downhole detection, and in particular, to a method, device, equipment and medium for identifying a sidetrack drilling well trajectory and a window size. Background technique [0002] With the continuous increase of the secondary development of the oil field, the number of oil and gas wells using the casing window side drilling technology has also increased, not only in offshore oil fields, but also in the number of side drilling in land oil fields. Downhole Transient Electromagnetic Methods (TEM) is one of the more commonly used downhole detection techniques in recent years, also known as pulsed eddy current detection technology. It has been widely used in downhole casing damage due to its broadband characteristics in the rapid measurement process. Detection and online monitoring of the medium after the sleeve. The casing window sidetracking is to drill a new hole by opening a w...

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Problems solved by technology

[0003] At present, in related technologies, on the one hand, mathematical models can only be used to theoretically analyze the wellbore trajectory and the size of the window shape. The actual well trajectory and window size cannot be completely consistent with the theoretical size; on the other hand, if the traditional gyro inclinometer and magnetic inclinometer are used to identify the well trajectory and window shape, since the magnetic It needs to be in a non-magnetic environment during use, and the casing magnetic field in sidetracking wells with casing windows is much larger than the geomagnetic field, so it is impossible to obtain real azimuth information; and the gyroscope needs a fluxgate to determine the magnetic north during the measurement process. If it is at the wellhead If the magnetic north is determined, the detection equipment will produce serious cumulative errors during the downhole process, and the real situation in the downhole cannot be obtained.

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