In the exploration and development of oil and gas resources, the effective prediction of formation fracture pressure plays an important role in evaluating wellbore stability, designing safe drilling schemes, and fracturing construction. This paper studies the seismic prediction method of fracture pressure in shale formations: First, according to the characteristics of shale formation with strong anisotropy, and based on Huang-Rongzun model for formation fracture pressure prediction, a more comprehensive shale anisotropy fracture pressure prediction model is established using the anisotropic stress coupling factor. Secondly, based on the rock strength parameter calculation model. The compressive strength and tensile strength of the formation are estimated by using the elastic parameters and physical property parameters obtained by inversion. Meanwhile, the prediction method of formation pressure based on wave impedance is used to obtain the pore pressures and overburden pressure. Finally, the seismic prediction of fracture pressure of the shale formation is realized based on the shale anisotropic fracture pressure prediction model. A real data case example shows that the proposed method can not only provide a continuous pressure profile in the whole working area, but also provide a reliable reference for the drilling design and fracturing construction in the area.
Presentation Date: Tuesday, October 13, 2020
Session Start Time: 1:50 PM
Presentation Time: 3:30 PM
Location: 360C
Presentation Type: Oral
