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Geothermal Energy

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Fig. 4 | Geothermal Energy

Fig. 4

From: Stress sensitivity of porosity and permeability under varying hydrostatic stress conditions for different carbonate rock types of the geothermal Malm reservoir in Southern Germany

Fig. 4

Overview of the litho-types limestone (L2), dolomitic limestone (dL1), and dolostone (D1, D5), typically occurring in the carbonate sequence of the Upper Jurassic Malm reservoir. Images are from thin sections of the studied samples, pore size distributions are from digital image analysis, and pore throat diameters were measured by mercury intrusion porosimetry (MIP). See text for summarized description and Appendix 1 for detailed explanations. M—micritic lithoclast, B—Bankia Striata, C—Clypeina Jurassica, G—gastropod, Oc—oncolit, Oo—ooid, Bi—bitumina, V—vug, F—fissure

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