TY - GEN
T1 - Compaction trends in the Vienna Basin
T2 - 6th International Conference on Fault and Top Seals 2022, FTS 2022
AU - Skerbisch, L.
AU - Misch, D.
AU - Drews, M. C.
AU - Stollhofen, H.
AU - Sachsenhofer, R. F.
AU - Arnberger, K.
AU - Schuller, V.
AU - Zámolyi, A.
N1 - Publisher Copyright:
© 2022 International Conference on Fault and Top Seals
PY - 2022
Y1 - 2022
N2 - In a purely top seal-controlled scenario the capillary entry or breakthrough pressure defines the maximum amount of buoyant fluid that can theoretically be accommodated. The seal capacity can be estimated based on normal compaction trends, therefore this work aimed at calibrating established normal compaction trends and resulting seal capacity models for Miocene (Pannonian, Sarmatian, and Badenian) seal rocks of the Vienna Basin. 41 core samples from the Vienna Basin covering a broad depth interval from 720 m to 3270 m were investigated with X-ray diffraction, mercury intrusion capillary porosimetry, He-pycnometry, and Rock-Eval pyrolysis. The results of this study show that established mudstone normal compaction trends are generally suitable to estimate seal capacity in the Miocene Vienna Basin fill. Theoretical column heights show a clear depth trend, and Badenian seals from burial depths > 2000 m show hydrocarbon column heights > 2000 m, implying that capillary seal failure is unlikely. Free hydrocarbon indicators (Rock-Eval S1 and PI) show clear signs of oil staining which correlates with the estimated seal capacity. That points to the validity of seal quality estimations and a potentially significant vertical mobility of fluids in the Vienna Basin which is not purely fault-controlled.
AB - In a purely top seal-controlled scenario the capillary entry or breakthrough pressure defines the maximum amount of buoyant fluid that can theoretically be accommodated. The seal capacity can be estimated based on normal compaction trends, therefore this work aimed at calibrating established normal compaction trends and resulting seal capacity models for Miocene (Pannonian, Sarmatian, and Badenian) seal rocks of the Vienna Basin. 41 core samples from the Vienna Basin covering a broad depth interval from 720 m to 3270 m were investigated with X-ray diffraction, mercury intrusion capillary porosimetry, He-pycnometry, and Rock-Eval pyrolysis. The results of this study show that established mudstone normal compaction trends are generally suitable to estimate seal capacity in the Miocene Vienna Basin fill. Theoretical column heights show a clear depth trend, and Badenian seals from burial depths > 2000 m show hydrocarbon column heights > 2000 m, implying that capillary seal failure is unlikely. Free hydrocarbon indicators (Rock-Eval S1 and PI) show clear signs of oil staining which correlates with the estimated seal capacity. That points to the validity of seal quality estimations and a potentially significant vertical mobility of fluids in the Vienna Basin which is not purely fault-controlled.
UR - http://www.scopus.com/inward/record.url?scp=85145561124&partnerID=8YFLogxK
U2 - 10.3997/2214-4609.202243008
DO - 10.3997/2214-4609.202243008
M3 - Conference contribution
AN - SCOPUS:85145561124
T3 - 6th International Conference on Fault and Top Seals 2022, FTS 2022
BT - 6th International Conference on Fault and Top Seals 2022, FTS 2022
PB - European Association of Geoscientists and Engineers, EAGE
Y2 - 26 September 2022 through 28 September 2022
ER -