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GPK-1
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639 m
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Mud logging: millimetre opened fractures with oil (also observed on the cores) at around 635 m
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Log cutting: Marnes à Ovoïdes reduced in comparison with Rittershoffen (19 m on the 44 m expected)
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Seismic profile: nothing observed
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Fracture zone with 26 m vertical apparent offset interpreted as a fault
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1002 m
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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
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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
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Seismic profile: nothing observed
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Fracture zone with 60.5 m cumulated offset interpreted as a fault
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GPK-2
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686 m
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Mud logging: gas anomalies around 675 m
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Log cutting: Marnes à Ovoïdes reduced in comparison with Rittershoffen (22,5 m instead of 44 m expected)
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Seismic profile: nothing observed
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Fracture zone with 21.5 m vertical apparent offset interpreted as a fault
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793 m
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Mud logging: positive ROP anomaly, decrease in gas log
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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
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Seismic profile: nothing observed
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Fracture zone with 136 m vertical apparent offset interpreted as a fault
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911 m
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Mud logging: big caliper and gas anomalies, mud losses which involves permeability
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Log cutting: one half of the Calcaire à Entroques is absent (5 m instead of 10 m expected)
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Seismic profile: nothing observed
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Fracture zone with 5 m vertical apparent offset interpreted as a fault
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1064 m
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Mud logging: caliper and gas anomalies
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Log cutting: facture zone with conglomeratic base of the Couches Intermédiaires absent and the top of the Couches de Karlstal affected
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Seismic profile: nothing observed
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Fracture zone with 32 m vertical apparent offset interpreted as a fault
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