Figure 5
From: Rock Physical Controls on Production-induced Compaction in the Groningen Field
BSEM image of sample ZRP-3A_123BV, showing a representative microstructure of a sandstone sample in the post-testing state with a mean grain size of 140 µm (obtained by Laser particle size analysis). Top part of the image lists the mineral content derived from X-Ray Diffraction analysis using bulk rock material. The image shows multiple examples of leached K-feldspar (grain skeletons), in which also kaolinite is present as reaction product of the leaching product. Quartz minerals contain cracks, as well as grain rimming clay minerals.
