Well kick and well leakage pre-judgment method

• Main Authors: ZHOU BO, WANG HAIGE, ZHANG FUCHENG, GE YUNHUA, ZHUO LUBIN, CUI LONGLIAN, LIU LI
• Format: Patent
• Language: Chinese; English
• Published: 15.04.2022
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention provides a well kick and well leakage pre-judging method which comprises the following steps: starting a slurry pump to enable slurry in a slurry circulating pool and an inner and outer annular borehole of a drill string to be in a flowing state; stratum parameters are collected through the logging-while-drilling device; logging parameters are collected through a logging device; collecting pressure and temperature parameters in the well through a while-drilling temperature and pressure measuring device; transmitting the formation parameters, the logging parameters, the in-well pressure and the temperature parameters to a gushing and leakage pre-judging system; the gushing and leakage pre-judging system establishes a normal trend line of each parameter during normal drilling and well invasion characteristic templates under different gushing and leakage amounts when well invasion occurs; the gushing and leakage pre-judging system compares the stratum parameters, the logging parameters, the in-well