Q1. The MRT in a 11340 deep well is 240 F. Circulation was stopped at 12.30 am and logger was at the bottom of the well at 3:00 pm.

A. Calculate the geothermal gradient, assuming a surface temperature of 75 F.

B. Calculate the formation temperature at 8750 feet.

C. Using the Overton and Lipson correlation (see the Measurement Environment lecture slides), find Rmf and Rmc at 75 F assuming the mud resistivity at 75 F is 0.35 m and Km= 0.85.

2.) Assume that the second logging run recorded the maximum temperature of 250 F which was performed at 2:30 am (the next day after the first measurement that was mentioned in Q1). The circulation time was 5 hours. Calculate the formation temperature at 11340 using a Horner plot. Please make sure to label all axis.