Spacing between transmitter and receiver

Input(s)

$s_{\text {off: }}$ Tool Standoff (in.)

$C_{m f}$: Mud/Formaton Velocity Contrast (dimensionless)

Output(s)

$\left(L_{s}\right)_{c}$: Transmitter-to-Receiver Spacing $(\mathrm{ft})$

Formula(s)

$$ \left(L_{s}\right)_{c}=2 * s_{o f f} *\left(\frac{1+C_{m f}}{1-C_{m f}}\right)^{0.5} $$

Reference(s)

Bassiouni, Z., 1994, Theory, Measurement, and Interpretation of Well Logs. SPE Textbook Series Vol. 4. Chapter 10, Page: 192.