The deep lateral resistivities of both the newly drilled side - tracking well and the original hole may reduce differently in producing interval , which is characterized by resistivity reduction.

• 侧钻后新井眼与原井眼在油层动用井段的深侧向电阻率均有不同程度的降低,用电阻率减小率表示。通过分析认为,动用井段油层含油饱和度的变化引起了电阻率的减小。