Research Article

Pore Structure and Fluid Uptake of the Springer/Goddard Shale Formation in Southeastern Oklahoma, USA

Figure 8

Imbibition of Cs+ and ReO4 tracers in API brine into B-13010 sample of Springer shale, mapped on three faces (top, interior, and bottom; from top to bottom for each vertical panel of photos and tracer results, each tick on the x- and y-axes has a scale of 1000 μm); imbibition time is 24.3 hrs. The laser spot size for sampling is 100 μm, while the interior grid sizes cover the whole sample and are mapped with a two-grid scheme of variable spacing between spots to catch the concentration change near the bottom edge, as shown in the interior photo on which the laser spots are visible. The bottom photo shows the custom-made aluminum chuck, with two screws (tip shown in the top photo, to the right) to place the sample during the tracer mapping. The white areas indicate the regions of tracer concentration below the detection limit of LA-ICP-MS approach.