Multipole combined logging-while-drilling mode and signal transceiving synchronization method

A multi-pole, drilling and logging technology, which is applied in the directions of surveying, earthwork drilling, borehole/well components, etc., can solve the problems that it is difficult to take into account the full wave train measurement and azimuth imaging, so as to enrich formation evaluation information and improve measurement efficiency effect
CN108979628AActive Publication Date: 2018-12-11INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
Publication Date
2018-12-11

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Abstract

The invention relates to a combined logging mode of a multipole logging-while-drilling device. The combined logging mode which comprises a drilling logging mode and a lifting logging mode is providedaccording to the actual needs of well drilling operation, full wave train measuring and orientation imaging of stratum longitudinal waves, transverse waves, Stoneley waves and the like can be achievedat the same time, and rich stratum evaluation information can be provided. Aiming at the fact that the working diameters of the different modes of the combined logging mode are different and transmitting and receiving need to be controlled synchronously, the invention further provides a signal transceiving synchronization method combining transceiving communication and synchronous control, the fact that the multipole logging-while-drilling device works according to set flow under each working mode and during the switching of different modes is guaranteed, and measuring efficiency is increased.
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Description

technical field

[0001] The invention relates to the technical field of acoustic logging while drilling, in particular to a logging mode of acoustic wave multipole combination while drilling and a method for synchronizing signal sending and receiving in the combined logging mode. technical background

[0002] The acoustic logging while drilling technology measures the compressional wave and shear wave velocity of the formation while drilling. These two elastic wave velocities provide important information for the exploration and development of underground oil and gas resources, including pore pressure, overburden pressure gradient, lithology, Rock mechanical properties, etc. At the same time, compared with the wireline acoustic logging technology, the acoustic wave while drilling reduces the occupation time of the drilling rig at the well site, improves the drilling efficiency, and reduces the drilling safety risk, which can meet the needs of highly deviated wells, horizontal...

Claims

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