Science – Society – Technology
Depth | |
---|---|
GPK-1 | |
639 m | Mud logging: millimetre opened fractures with oil (also observed on the cores) at around 635 m |
Log cutting: Marnes à Ovoïdes reduced in comparison with Rittershoffen (19 m on the 44 m expected) | |
Seismic profile: nothing observed | |
Fracture zone with 26 m vertical apparent offset interpreted as a fault | |
1002 m | Mud logging: millimetre to centimetre fractures filled with calcite, quartz, oil and bitumen, anomalies in caliper, neutron porosity and ROP, decrease of density, increase of porosity and temperature anomalies |
Log cutting: Marnes Bariolées absent, top of the complex constituted by the complex of Dolomies—Calcaires Ondulés—Couches à Myacites and base of the Dolomie à Lingules affected | |
Seismic profile: nothing observed | |
Fracture zone with 60.5 m cumulated offset interpreted as a fault | |
GPK-2 | |
686 m | Mud logging: gas anomalies around 675 m |
Log cutting: Marnes à Ovoïdes reduced in comparison with Rittershoffen (22,5 m instead of 44 m expected) | |
Seismic profile: nothing observed | |
Fracture zone with 21.5 m vertical apparent offset interpreted as a fault | |
793 m | Mud logging: positive ROP anomaly, decrease in gas log |
Log cutting: most of Keuper’s units are absent: Argiles de Levallois—Grès du Rhétien; Marnes Irisées moyennes; Argiles de Chanville; Dolomie en Dalles—Marnes Irisées inférieures—Grès à Roseaux | |
Seismic profile: nothing observed | |
Fracture zone with 136 m vertical apparent offset interpreted as a fault | |
911 m | Mud logging: big caliper and gas anomalies, mud losses which involves permeability |
Log cutting: one half of the Calcaire à Entroques is absent (5 m instead of 10 m expected) | |
Seismic profile: nothing observed | |
Fracture zone with 5 m vertical apparent offset interpreted as a fault | |
1064 m | Mud logging: caliper and gas anomalies |
Log cutting: facture zone with conglomeratic base of the Couches Intermédiaires absent and the top of the Couches de Karlstal affected | |
Seismic profile: nothing observed | |
Fracture zone with 32 m vertical apparent offset interpreted as a fault |