Numerical simulation of shear wave attenuation in borehole inserted by a horizontal fracture

Yan, Binpeng; Ou, Weiming; Huang, Xingguo; Silva, Nuno Vieira da

doi:10.1007/s11600-020-00503-3

Cited by 7 publications

(1 citation statement)

References 19 publications

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“…Due to problems of the electrode plate opening and the instrument size, it is difficult to effectively collect the electrical imaging and nuclear magnetic resonance logging data. Therefore, the use of array acoustic logging data to identify and evaluate the fractures near the well bore has unique advantages (Spring and Dudley, 1992;Lynn et al, 1995;Yan et al, 2020;Cai et al, 2022a;Cai et al, 2022b).…”

Section: Introductionmentioning

confidence: 99%

Forward modeling of P- and S-waves response of fractures intersected with horizontal wells in tight reservoirs

et al. 2023

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Horizontal wells play an important role in expanding the drilling volume of reservoirs and oil production area, and are widely used in unconventional reservoirs. Fractures have a positive effect on reservoir permeability, but fractures can also cause accidents such as casing deformation and inter-well frac-hit. It is of great significance to identify and evaluate fractures intersected with horizontal wells in tight reservoirs. In this paper, a three-dimensional numerical model of horizontal wells and fractures in tight reservoirs is designed. The responses of monopole P-wave and dipole S-wave to fractures with different width, dip angle and filling medium are systematically studied, by using three-dimensional finite difference algorithm. The results show that when the fracture is filled with calcite, the amplitude attenuation of monopole P-wave and dipole S-wave has a monotonic exponential increase with the increase of fracture width and the decrease of fracture dip angle. In the real data processing, the amplitude attenuation of P- and S-waves can be used to jointly evaluate the fracture filled with calcite. When the fracture is filled with water, both P- and S-waves have prominent amplitude attenuation. P wave amplitude attenuation does not have a monotonic variation with the increase of fracture width but it has a monotonic increase with the decrease of fracture dip angle. S wave amplitude attenuation has a monotonic increase with the increase of fracture width and the decrease of fracture dip angle. The amplitude attenuation of P- and S- waves rises significantly when the fracture is filled with natural gas. This study is crucial for better understanding the response of P- and S-waves to fractures intersected with borehole in tight reservoirs, and it provides useful information for the inversion of fracture parameters by using P- and S-waves.

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