A new boundary-detection method for geosteering based on the electromagnetic scattering

Determination of the bed boundaries which are serval meters to tens of meters from borehole is of great importance to the realtime geosteering and optimized well placement. The current approaches obtain the information of bed boundary by recording amplitude ratio and phase difference to identify the difference between the homog-eneous and layer medium. In this paper, we proposed a new method for geosteering. By using the tools with one coaxial transmitter, two coaxial receivers and the transmitter is set in the middle of the each pair of receivers coils. And we adopt the vector difference to depict the information of approaching bed boundary. Numerical results show that , In the vertical and deviated well, the distance to boundary (DTB) of the new method up to 10m. Presentation Date: Tuesday, October 16, 2018 Start Time: 8:30:00 AM Location: 212A (Anaheim Convention Center) Presentation Type: Oral