Impacts of hydrothermal dolomitization and thermochemical sulfate reduction on secondary porosity creation in deeply buried carbonates (Record no. 189575)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 02672nab a2200241 4500 |
| 008 - CÓDIGOS DE INFORMACIÓN DE LONGITUD FIJA - INFORMACIÓN GENERAL | |
| Campo de control de longitud fija | 260224s2016 xxu ing |
| 041 ## - IDIOMA | |
| Idioma | Inglés |
| 245 00 - TITULO | |
| Título | Impacts of hydrothermal dolomitization and thermochemical sulfate reduction on secondary porosity creation in deeply buried carbonates |
| Subtítulo | A case study from the Lower Saxony Basin, northwest Germany |
| 260 ## - PUBLICACION, DISTRIBUCION, ETC | |
| Lugar de publicación, distribución, etc. | |
| Nombre de publicador, distribuidor, etc. | |
| Fecha de publicación, distribución, etc. | abr. 2016 |
| 270 ## - FECHA DE CARGA | |
| Fecha de carga | 06/06/2016 ; 06/06/2016 |
| 300 ## - DESCRIPCION FISICA | |
| Otra extensión | 24 p. ; 597-621 |
| 520 ## - RESUMEN, ETC | |
| Resumen | Transcripción del resumen del autor: The role of deep-burial dissolution in the creation of porosity in carbonates has been discussed controversially in the recent past. We present a case study from the Upper Permian Zechstein 2 carbonate reservoirs of the Lower Saxony Basin in northwest Germany. These reservoirs are locally characterized by high amounts of carbon dioxide (CO2) and variable amounts of hydrogen sulfide (H2S), which are derived from thermochemical sulfate reduction (TSR) and inorganic sources. To study the contribution of these effects on porosity development, we combine petrography, stable isotope, and rare earth and yttrium (REY) analyses of fracture cements with Raman spectroscopy and d13C analyses of fluid inclusions. It is shown that fluid migration along deep fault zones created and redistributed porosity. Fluid inclusion analyses of vein cements demonstrate that hydrothermal fluids transported inorganic CO2 into the reservoir, where it mixed with minor amounts of TSR-derived organic CO2. The likely source of inorganic CO2 is the thermal decomposition of deeply buried Devonian carbonates. The REY distribution patterns support a hydrothermal origin of ascending iron- and CO2-rich fluids causing dolomitization of calcite and increasing porosity by 10%–16% along fractures. This porosity increase results from hydrothermal dolomitization and dissolution by acids generated from the reaction of Fe2+ with H2S to precipitate pyrite. In contrast, hydrothermal dolomite cements reduced early diagenetic porosity in dolomitic intervals by approximately 17%. However, the carbonate dissolution in the predominantly calcitic host rock results in a net increase in porosity and permeability in the vicinity of the fracture walls, which has to be considered for modeling reservoir properties and fluid migration pathways. |
| 581 ## - ESTADO DE COLECCIÓN | |
| Estado de colección | 4 |
| 773 0# - CORRECCIÓN | |
| Título | AAPG Bulletin |
| Partes relacionadas | 100 |
| 942 ## - DESC. DE MATERIAL | |
| Tipo de item KOHA | Artículo de Revista |
| 100 1# - RESPONSABLE PERSONAL | |
| Apellido, Nombre | Biehl, Bianca C. |
| 9 (RLIN) | 55380 |
| 100 1# - RESPONSABLE PERSONAL | |
| Apellido, Nombre | Reuning, Lars |
| 9 (RLIN) | 55381 |
| 100 1# - RESPONSABLE PERSONAL | |
| Apellido, Nombre | Schoenherr, Johannes |
| 9 (RLIN) | 55382 |
| 100 1# - RESPONSABLE PERSONAL | |
| Apellido, Nombre | Lüders, Volker |
| 9 (RLIN) | 55383 |
| 100 1# - RESPONSABLE PERSONAL | |
| Apellido, Nombre | Kukla, Peter A. |
| 9 (RLIN) | 52316 |
| Biblioteca propietaria | Biblioteca actual | Fecha de adquisición | Inventario | Total de préstamos | Inventario | Fecha de carga | Tipo de item KOHA |
|---|---|---|---|---|---|---|---|
| Biblioteca Alejandro Angel Bulgheroni | Biblioteca Alejandro Angel Bulgheroni | 06/03/2026 | 200061815 | 200061815 | 06/03/2026 | Artículo de Revista |
