RE: Malcy's RNS comment..22 Jun 2021 10:46
The depth has been estimated by studying the features in the seismic studies, the sections show the depth in time not meters. Since they estimate the depth to be 400m, and the section shows 600ms or 0.6sec, that is the time the seismic signal takes to travel down and back from the target.
The top target looks about 150m thick, so my guess its 400m to the target, may be a little more , and another 100 or so to its base.. The test tools would have to pass through the target to take measurements..
DM says the top target is at the base of the river bed. The river bed has been split into upper and lower. The lower is where the strata transitions from the red sandstone below to lake bed sediments above. At the base I take to mean under, so in the red sandstone or otherwise in the transitional area where formation is loose .
The bottom target DM says is in the karoo which is white sandstone.
the RNS states..
"Due to the poorly consolidated nature of the Lake Bed Formation encountered at Tai-1, it will not be possible to perform drill stem tests on any pay zones identified in the shallow strata in this well."
This could mean newly found, as in that 4-6m zone, not so much the 1st target especially if its in the red sandstone, rather than the loose sediment..