Acoustic-electric imaging logging instrument

Abstract

The invention discloses an acoustic-electric imaging logging instrument. The acoustic-electric imaging logging instrument comprises a resistivity imager for logging and a sound wave imager, wherein the resistivity imager and the sound wave imager are positioned on one instrument, the resistivity imager is positioned at the upper part of the sound wave imager, and an upper centralizer, a direction short joint, a universal joint and a lower centralizer are sequentially connected between the resistivity imager and the sound wave imager. The acoustic-electric imaging logging instrument has the advantages that the problem of the resistivity imager and the sound wave imager not in the same instrument in the prior art is solved, the two logging maps of resistivity imaging and sound wave imaging can be completed by one tool through one-time logging, the construction period is shortened, the cost is reduced, and the risk of engineering accidents is decreased.

Description

technical field

[0001] The invention relates to the field of petroleum and natural gas exploration and development, in particular to an acoustic-electric imaging logging instrument. Background technique

[0002] Imaging logging is a method of imaging physical parameters of the borehole wall and objects around the well based on the observation of the geophysical field in the borehole, including borehole wall imaging, wellside imaging and interwell imaging. Among them, borehole imaging is the most widely used logging method, which is mainly divided into two imaging methods: resistivity imaging and acoustic imaging. In the prior art, resistivity imaging and acoustic wave imaging instruments are two independent logging instruments, each of which has an independent azimuth sub, centralizer, upper and lower joints, and the like. Among them, the resistivity imaging logging tool has a wide dynamic measurement range, while the acoustic logging tool can perform 360° complete borehole...

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