Orientation vertical seismic logging technology for pressing crack monitoring

Abstract

The invention relates to an orientation vertical seismic logging technology for pressing crack monitoring, and the technology employs an underground orientation module to upload an analog quantity to a pup joint of a multiage vertical seismic logging instrument, and then employs the pup joint for AD conversion and transmits the data to a remote pup joint. Afterwards, the data is transmitted to a ground collection system of the vertical seismic logging instrument for angle calculation, and finally the relative azimuth and well deflection of the instrument are calculated through operation software. The pressing crack monitoring process comprises the steps: placing the instrument at a specific depth, opening a supporting arm, employing PI vertical seismic section system software (certificate ID: 1232500) for data processing, obtaining the relative bearing of a scribed line of the pup joint with a higher edge, and collecting the well deflection of the pup joint; displaying and recording the relative bearing and well deflection of the pup joint in the software, and obtaining the initial data at the moment; finding an initial well depth through a ground depth system when the instrument is placed in a well again, comparing the well deflection and relative bearing data of the initial descending with the data, enabling the bearing to be equivalent to the initial descending direction through software correction, thereby achieving an effect that the instrument never leaves from the initial position.

Description

technical field [0001] The azimuth vertical seismic logging technology for fracturing monitoring related to the present invention belongs to the field of seismic survey technology, and the downhole azimuth of the instrument is calculated by adding an azimuth module to a multi-level vertical seismic logging tool (MultiVSP) acquisition sub-section. Therefore, the limitation that the instrument must always be in the well in the fracturing monitoring operation can be broken through. Background technique [0002] At present, in the field application of VSP, especially for fracturing monitoring, the time interval between perforation and fracturing can sometimes be as long as half a month or one month. Since the instrument does not have a positioning function, the position of the instrument cannot be moved. , not to mention. This situation has a great impact on the service life of the instrument, the utilization rate of the instrument, and the efficiency of the wellhead. Decision...

AI Technical Summary

Problems solved by technology

[0002] At present, in the field application of VSP, especially for fracturing monitoring, the time interval between perforation and fracturing can sometimes be as long as half a month or one month. Since the instrument does not have a positioning function, the position of the instrument cannot be moved. , not to mention

This situation has a great impact on the service life of the instrument, the utilization rate of the instrument, and the efficiency of the wellhead

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