Mahu tight conglomerate reservoir, poor porosity and permeability conditions, high gravel content, gravel size difference, heterogeneity is very strong. In recent years, the formation condition of oil and gas field is more and more complex, and the drilling difficulty is more and more difficult. In the drilling of vertical well, highly deviated well and horizontal well, such complicated conditions as sticking and well collapse occur from time to time, it is of great significance to avoid or reduce the occurrence of downhole complications, to ensure the construction safety and to reduce the drilling cost. To study the “Three pressures” of the Dzungar basin, and to adopt experimental techniques for sampling velocities of p-and s-waves and elastic parameters of samples under simulated formation conditions, the calibration method of mechanical rock elastic parameter scale acoustic rock elastic parameter and test data scale logging data is adopted. According to the research results, the model and parameters of interpretation and processing of “Three pressures” data are optimized, and the database of “Three pressures” results is established, it plays an important role in determining oil–water interface of oil and gas wells, identifying drilling geological risks and guiding formation fracturing.