Research on Quantitative Risk Assessment Method for Kick Handling
As oil and gas exploration and development go towards the deep and ultra-deep formations,the situa-tion of well control is becoming increasingly severe and the risk of kick handling increasing,the effect of human factor on kick handling is great,and the expert experience is difficult to popularize.Based on the analysis of the key factors of kick handling,a quantitative risk assessment model of kick handling is established,considering the effects of four factors:influx volume,shut-in time,kill rate and kill fluid density.Taking the risk matrix method as a assessment method of kick handing risk,a quantitative risk assessment method of kick handling is developed,considering the influence of kick criteria,maximum allowable shut-in casing pressure and pressure safety density window.The correctness and reliability of the evaluation method are verified by case analysis.The results show that this method can effectively reduce the risk and ensure the drilling safety by quantitative description and risk classification,and has great practical significance for guiding field operations.
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