Zur Herkunft der Erdöle im mittleren Oberrheingraben und ihre Bedeutung für die Rekonstruktion der Migrationsgeschichte und der Speichergesteinsdiagenese
Zur Herkunft der Erdöle im mittleren Oberrheingraben und ihre Bedeutung für die Rekonstruktion der Migrationsgeschichte und der Speichergesteinsdiagenese
In the past much has been speculated on the prerequisites and the limitations for the formationof oil fields in the central Upper Rhine Graben. With an interdisciplinary investigationprogram consisting of the disciplines organic geochemistry, petrography and petrophysics aswell as the integration of...
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Personal Name(s): | Bruss, Dietfried (Corresponding author) |
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Contributing Institute: |
Publikationen vor 2000; PRE-2000; Retrocat |
Imprint: |
Jülich
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag
2000
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Physical Description: |
VIII, 222 p., Beilage |
Document Type: |
Report Book |
Research Program: |
Addenda |
Series Title: |
Berichte des Forschungszentrums Jülich
3831 |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
In the past much has been speculated on the prerequisites and the limitations for the formationof oil fields in the central Upper Rhine Graben. With an interdisciplinary investigationprogram consisting of the disciplines organic geochemistry, petrography and petrophysics aswell as the integration of all these results into a two-dimensional (2-D) numerical simulation,all these relationships will be clarified.Four oil families and three mixed oil groups could be differentiated with organic-geochemicalinvestigations of 26 oils from different fields. Therefore, the sedimentary rock sequenceoverlying the crystalline basement was investigated for potential source rocks. These wereexamined for maturity and their chemical and isotopic characteristics were compared withthose of the oil families. The geographic-geologic interpretation of these results revealed thefollowing classifications and limitations: The Posidonia shale - Keuper sandstone oil systemcovers the entire graben area south of Heidelberg; the Pechelbronner Schichten -Pechelbronner Schichten oil system is limited to the western area of the graben; theSeptarienton - Cyrenen-Mergel oil system includes the entire width of the graben south of theline Landau-Heidelberg; the Untere Hydrobien-Schichten - Obere Hydrobien-Schichten oilsystem has a narrow, locally limited distribution in the center of the northern area ofinvestigation. [...]The partially oil-bearing carrier and reservoir rocks of the central Upper Rhine Grabenpreserve evidence of a complex diagenetic and hydrothermal history favorable for thegeneration, migration, and entrapment of petroleum. Detailed petrographical andpetrophysical investigations of four selected carrier and reservoir layers allowed thereconstruction of these histories . It is apparent that the diagenetic processes in the individuallayers are caused by a tectonically controlled interplay of physical events (sedimentation,burial, heat flow) and chemical characteristics (rock- and pore water composition) . Short-termtectonic events, such as the hydraulic opening of a fault, could control numerous diageneticprocesses and therefore lead locally to a complication of the diagenesis pattern. For thisreason the temporal and spatial scales of the diagenetic development cannot be replicated bybasin-wide numerical simulation . |