Logging while drilling electromagnetic wave responses in inclined bedding formation

FAN Yiren,HU Xufei,DENG Shaogui,YUAN Xiyong,LI Haitao

Table 3 Formation parameters of two five-layer formation models.

Stratigraphic model Layer ① Layer ② Layer ③ Layer ④ Layer ⑤ Model 1 (Layers ② and ④ are VTI layers, and the rest are isotropic layers) R1h=1.0 Ω?m R1v=1.0 Ω?m ψ1=0, χ1 =0 R2h=5.0 Ω?m R2v=10.0 Ω?m ψ2=0, χ2 =0 R3h=1.0 Ω?m R3v=1.0 Ω?m ψ3=0, χ3=0 R4h=10.0 Ω?m R4v=20.0 Ω?m ψ4=0, χ4=0 R5h=1.0 Ω?m R5v=1.0 Ω?m ψ5=0, χ5 =0 Model 2 (Layers ② and ④ are TTI layers, and the rest are isotropic layers) R1h=1.0 Ω?m R1v=1.0 Ω?m ψ1=0, χ1 =0 R2h=5.0 Ω?m R2v=10.0 Ω?m ψ2=45°, χ2 =0 R3h=1.0 Ω?m R3v=1.0 Ω?m ψ3=0, χ3 =0 R4h=10.0 Ω?m R4v=20.0 Ω?m ψ4=80°, χ4=30° R5h=1.0 Ω?m R5v=1.0 Ω?m ψ5=0, χ5=0