Method and device for imaging adjoining well by acoustic logging and storage medium

Abstract

The embodiment of the invention discloses a method and device for imaging an adjoining well by acoustic logging. The method comprises the following steps of collecting dipole longitudinal wave data infour orientations when a dipole sound source is excitated, wherein the dipole sound source is in an orthogonal dipole mode; obtaining dipole longitudinal wave data in a plurality of geographic orientations through vector rotation according to the collected dipole longitudinal wave data in four orientations; carrying out deconvolution filtering processing on the obtained dipole longitudinal wave data in each orientation to obtain filtered sound wave data; carrying out wave field separation on the filtered sound wave data to obtain separated upstream reflective longitudinal wave data and downstream reflective longitudinal wave data; carrying out migration imaging processing on the upstream reflective longitudinal wave data and the downstream reflective longitudinal wave data obtained by separating the wave field in each geographic orientation to obtain imaging data of a borehole of the adjoining well. According to the scheme, the adjoining well can be imaged by means of acoustic logging.

Description

technical field [0001] The invention relates to the field of well logging, in particular to a method, device and storage medium for imaging adjacent wells by using acoustic logging. Background technique [0002] The use of sidetracking wells to develop low-permeability oil and gas fields can reduce drilling costs and increase oil and gas well production. However, during the construction of sidetracking wells, two adjacent wellbores will collide due to various reasons, which will inevitably bring huge costs. Economic losses. Conventionally adopted wellbore anti-collision methods need to shut down production wells with anti-collision risks, re-log the wellbore trajectory after reducing production, which will put a lot of pressure on the production of the platform, and may even cause the old wells to fail to start the pump again Serious impact; for self-flowing wells, the cost and difficulty of retesting are very high. [0003] The conventional wellbore anti-collision technol...

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Problems solved by technology

The advantage of this method is that it utilizes the energy of the vibration of the drill bit during the drilling process, but it has the following problems. For example, the downhole sound source generated during the drilling process is not only the collision between the drill bit and the well wall or rock, but also the drill collar. , The drill pipe also collides with the well wall to generate sound waves. It is difficult to judge where the energy detected by the underwater acoustic sensor comes from; moreover, the energy attenuation law of the sound waves is transmitted in the formation, which is directly related to the nature of the formation, and is not constant. Change

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