Enter a figure in any of the boxes & click "Calculate".
According to Peter Rose (2001; AAPG Methods in Exploration Series, 12, p.20), the hydrocarbon recovery factor [HRF] for a reservoir should range from 100 bbls / acre-ft (very tight -borderline economic) to 1,200 bbls / acre-ft (top, world class reservoir) for oil, and range 125 mcf / acre-ft to 2,000 mcf / acre-ft for gas.
Enter drilling mud weight in ppg and the depth (=height of fluid column, so depth KB or flow line) and the result is the downhole pressure of the mud for a static hole.
Enter Leak-off test (LOT) pressure in psi and the depth (=height of fluid column, so depth KB or BOP rams) and the result is the mud-weight roughly equal to the downhole fracture pressure.
So, for a seismic reflector at 1 seconds two way time (TWT; = 0.5 sec. one way time), and a sonic log averaging 120 microseconds per foot, the reflector would be very roughly 1270 meters deep. A crude rule of thumb in young Tertiary mudstones; the first second is very roughly a kilometer deep. After that, increasing rock velocities mean significantly greater depths than 2 kms at 2 seconds TWT
At the moment the table above only works one-way: from sonic log derived microseconds (µsecs) per foot to seismic one-way velocities.
Later this will be a reversible formula.
Also in the planning stage are conversion tables for bottom hole temperature [BHT] corrections based on Horner plots and single temperature measurements.