Application of stress distribution simulation under fracture in predicting drilling leakage in Bozhong area

Abstract Faults and fractures are the most important factors that cause serious drilling leakage. Aiming to meet the production demand of improving the the reliability of leakage prediction, this paper uses the forward modeling technique of stress distribution in fault zones, by forward modeling of different fault combination modes, different scale fault stress influence ranges, and different fault zone filling modes, the stress changes, sizes, distribution characteristics, impact ranges, and properties of the fault zones on both sides of the fault were quantitatively displayed, achieving a comprehensive and quantitative characterization of the stress distribution under the fault; In addition, under the guidance of stress distribution, the reliability of leakage prediction can be improved effectively; Farther more, this paper combined the characteristics of the well-seismic data in the actual fault zone with the distribution of drilling leakage, proves that the three-dimensional space stress simulation and the stress intensity can effectively predict the plane and longitudinal distribution position of drilling leakage. The practicability of the method has been effectively applied and tested in the drilling leakage prediction and tracking in Bozhong area.