| Autor: |
Esfandyari, Moosa, Mohseni, Hassan, Heidari, Mojtaba, Seif, Asghar |
| Předmět: |
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| Zdroj: |
Geopersia; Summer/Fall2023, Vol. 13 Issue 2, p365-384, 20p |
| Abstrakt: |
Two surface sections of the Sarvak Formation in the Lurestan zone (Zagros Fold-Thrust Belt) were examined to inspect the naturally occurring fractures. The inspected sections are located in the Surgah anticline and the Kuh-e-Charmi anticline; in the Ilam and the Kermanshah provinces respectively. The Sarvak Formation was carefully examined to record the fracture types, their spatial distribution, spacing and cross-cutting relationships. Detailed examinations were undertaken on 420 fractures, 40 core plugs porosity and P-wave velocity and 205 thin sections. Three genetic types of fractures including tectonic, pressure-solution and dissolution related fractures were identified. The tectonic related fractures include two main sets (namely, with NW-SE and NE-SW trends). In addition, two types of stylolites including the bed-perpendicular and the tectonic stylolites (bed-parallel); were distinguished that postdate the fractures (veins). The Sarvak Formation underwent various diagenetic processes in couple with fracturing. The pore types include microporosity, intergranular porosity, moldic porosity and fracturestylolite. Petrophysical measurements (performed on some core plugs prepared from surface block samples), show that the carbonates of the Sarvak Formation have low porosity (more than 74% of the samples have less than 3%) and thereby high compressional wave velocity (Vp), (more than 96% of the samples have 6000 m/s), Therefore, it could be concluded that the Sarvak Formation is a tight interval in a reservoir aspect. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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