JV Kazgermunai LLP needed to quantify the positional uncertainty and validate existing survey data for more than 100 offset wells. Offset wells indicated that the target was between a naturally fractured 4- to 7-m-thick carbonate layer and a shale layer with a water-bearing formation below. Additional concerns included a possible structural dip and subseismic faults. This required careful maneuvering to prevent mud losses and accidental exit into the shale layer, which would result in water influx at the production stage.