Research on rock mechanics parameters of the Jurassic-Cretaceous reservoir in the Sikeshu sag, Junggar Basin, China

Structural analysis and reservoir evaluation has become increasingly important as petroleum exploration keeps making breakthroughs in the foreland of the southern Junggar Basin. However, the research on rock mechanical parameters which is closely related to them is rare. Based on the drilling core data, logging and seismic data of the Jurassic-Cretaceous in the Sikeshu sag, using the rock mechanics experiment and three-dimensional rock mechanics inversion, we defined the rock mechanics parameters in this study. The dynamic and static Young′s modulus shows a positively correlated linear relationship with the Poisson′s ratio. The rock mechanical parameters are controlled by the lithological variation. The lower K1q and J2t, J2x, J1b Formations have a higher Young′s modulus and a lower Poisson′s ratio, while the upper K1q and J1s Formations have a lower Young′s modulus and a higher Poisson′s ratio. When the Young′s modulus increases and the Poisson′s ratio decreases, the rock compressive strength increases. The