BISQ模型中岩石喷射流对井孔声导波的影响

Influence of Squirt Flow on Guided Waves in a Borehole

用B iot-喷射流统一模型(B ISQ模型)模拟孔隙地层,研究岩石喷射流对充流体井孔中声导波传播特点的影响.数值结果表明,顾及喷射流机制后,单极、偶极和四极声源激发的井孔导波的衰减都增大,激发幅度变小,但它们的频散特性几乎不受喷射流的影响.

The reservoir was modeled by homogeneous two-phase media based on BISQ model, and the effects of the squirt flow on the fundamental guided waves propagating in a borehole embedded in saturated porous media excited by monopole, dipole and quadrupole point sources were studied. The curves of velocity dispersion, attenuation coefficients and excitation curves of the fundamental guided waves show that the velocity dispersions are almost independent of the characteristic squirt flow length, the attenuations of guided waves are enhanced due to the squirt flow, and excitations of guided waves are decreased due to the squirt flow.