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Orientation vertical seismic logging technology for pressing crack monitoring

A technology of vertical seismic and well logging technology, which is applied in the direction of seismology for well logging records, etc. It can solve problems such as the influence of wellhead usage efficiency, the inability to raise, and the inability to move the position of the instrument, so as to improve logging efficiency and utilization rate , The effect of shortening the logging time

Inactive Publication Date: 2016-11-16
BEIJING JIEWEISITE TECH CO LTD
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  • Claims
  • Application Information

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

Method used

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  • Orientation vertical seismic logging technology for pressing crack monitoring
  • Orientation vertical seismic logging technology for pressing crack monitoring
  • Orientation vertical seismic logging technology for pressing crack monitoring

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Embodiment Construction

[0021] Such as figure 1 As shown, in the azimuthal vertical seismic logging of actual fracturing monitoring, multiple points can be measured for one downhole, the logging efficiency can be improved, and 12 valid data can be guaranteed. From top to bottom, the downhole instrument string consists of: 7-core logging cable bridle, telemetry nipple 1, interstage cable 2, acquisition nipple 8 and weighting rod 4 of the multi-stage vertical seismic logging instrument with azimuth function connected, The whole instrument string is connected with the surface data acquisition system 6 through the logging cable 5 .

[0022] Such as figure 2 As shown, after the instrument opens the support arm 14, the X-axis and Y-axis of the azimuth module 10 pass through the signal filtering and weighting circuit 7 to the ADC board; the AD analog-to-digital conversion is performed on the ADC board; Section 1, data acquisition system uploaded to the ground 6, PI vertical seismic profile system softwar...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/52
CPCG01V1/52
Inventor 林小艳聂海波赵广
Owner BEIJING JIEWEISITE TECH CO LTD
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