Fig. 5
Fracture system characteristics of the wells. a Rose diagrams show the strike of fractures for each individual well. Lines in rose diagrams show the wells’ azimuth trace. b Structural well correlation with the upper reference level of Top Purbeck. For each well, we show, from left to right, the depth in MD and TVD. The third column shows an image quality marker. Pink areas indicate intensely fractured zones, where not every single fracture could be measured. Areas highlighted in black indicate zones where bad image quality strongly affects or impedes the detection of fractures. The fourth column shows Terzaghi-corrected fracture intensity [n m−1] from 0 to 17 counts per m MD. The fifth column shows the strike direction of fractures for different well sections using rose diagrams. Columns 4 and 5 together include the well deviation (0–90°). c Rose diagram with the fracture population of all wells. Rose diagrams have a 10° bin size and are linear scaled. In Th1, the dashed grey-shaded areas indicate zones with distinct changes in bedding orientation (see Fig. 4), where fault zones are assumed