FIELD: oil-and-gas production.
SUBSTANCE: invention related to emission detection and monitoring of borehole. Method of emission detection in borehole, includes execution number of measurements using sonic log in borehole, estimation of drill fluid slowness from a number of measurements, and comparing drill fluid slowness with selected criteria, where estimation of drill fluid slowness consists of stages at which define fluid mode slowness as a frequency function, at least for one fluid mode and estimate drill fluid slowness from fluid mode slowness.
EFFECT: early emission warning for better safety of underground exploration and production.
10 cl, 14 dwg
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