Fig. 11

Typical carbonate crystals during \({T}_{\mathrm{Inj}} = 110\,^{\circ }\hbox {C}\): SEM picture (left) and corresponding EDX spectrum resp. mapping (right). Examples for injection (Picture 2) and production at \(37\,^{\circ }\hbox {C}\) (Picture 1) \(60\,^{\circ }\hbox {C}\) (Picture 3). All pictures at these injection temperatures show acicular aragonite crystals