METHOD FOR REVEALING ANOMALOUS DISCONTINUITY INTERFACES IN PORE PRESSURES IN NON-DRILLED GEOLOGICAL FORMATIONS AND SYSTEM IMPLEMENTING SAME Russian patent published in 2018 - IPC E21B47/06 E21B49/00 G01V1/40 

FIELD: computer engineering.

SUBSTANCE: present invention relates to a system and method for detecting anomalous discontinuity interfaces in pore pressure in non-drilled geological formations and a system for implementing said method. System is characterised in that it comprises a bit for drilling the formation, an electroacoustic transducer including a transmitter and a receiver being integrated in the bit, the electroacoustic transducer being connected to an electronic processing unit configured to: feed the electroacoustic transducer, generate, through the electroacoustic transducer, first sound pressure waves in the direction of axis (A) of said electroacoustic transducer and receiving a reflected signal in the form of reflected first sound pressure waves generated at least on one interface due to a transition from the first to the second, different from it, geological formation, which are arranged in series along direction (A) of radiation of said electroacoustic transducer, based on said received reflected signal, velocity (v₁) of said first generated sound pressure waves and distance (d) between said electroacoustic transducer and said at least one interface, generate, by the electroacoustic transducer, second sound pressure waves in the direction of said axis (A) of the electroacoustic transducer and determining electrical impedance (Z_E) on the contacts of said electroacoustic transducer, estimate, based on said electrical impedance (Z_E), the set of characteristic parameters of said first and second geological formations and estimate pressure in said second geological formation on the basis of said sound velocity (v₁) and said distance (d), as well as said set of characteristic parameters.

EFFECT: technical result is the prediction of anomalous pressure in formations that are still to be drilled, at a distance of several metres before drilling.

21 cl, 6 dwg