METHOD OF EARLY GAS INGRESS DETECTION IN HORIZONTAL WELLBORE DRILLING IN BROKEN-DOWN CAVERNOUS CARBONATE RESERVOIRS Russian patent published in 2017 - IPC E21B21/08 E21B47/06 

Abstract RU 2620690 C1

FIELD: oil and gas industry.

SUBSTANCE: in the method implementation, a bottom-hole pressure sensor is installed in the intertubular well space, the bottomhole pressure is monitored under full mud absorption conditions. By increasing the bottomhole pressure by more than 0.5 MPa, the event is set of gas outlet start from the formation into the horizontal bore.

EFFECT: reduced time spent in gas ingressed liquidation, increased safety.

2 dwg

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RU 2 620 690 C1

Authors

Vakhromeev Andrej Gelievich

Sverkunov Sergej Aleksandrovich

Dates

2017-05-29Published

2016-04-25Filed