Table 1.

Details of the hydrocarbon fluid inclusions (HCFIs) studied from the RV-1 well along with lithostratigraphic nomenclature, Mumbai Offshore Basin, India

Sample no.Horizon (m)Formation/ageLithologyHCFIs description
13055–3060Panna Formation/Paleocene–early EoceneSandstone and siltstoneBi-phase secondary inclusions concentrated along the annealed fractures within quartz grains. Size varies from 2 to 11 µm, and shapes are rectangular, fusiform and elongated. Degree of fill 10–20%
23065–3070Panna Formation/Paleocene–early EoceneSandstoneBi-phase inclusions concentrated along secondary fractures in quartz grains. Size varies from 2 to 5 µm, and shapes are rounded, eye-shaped, elongated and stretched. Degree of fill 1–5%
33270–3275Panna Formation/Paleocene–early EoceneSandstoneBi-phase inclusions concentrated along the secondary annealed fractures in quartz grains. Size varies from 5 to 9 µm, and shapes are elongated, irregular and rounded. Degree of fill 5–10%
43445–3450Panna Formation/Paleocene–early EoceneSandstone and shaleBi-phase secondary inclusions concentrated along the secondary annealed fractures in quartz grains. Size varies from 3 to 12 µm, and shapes are irregular, oval and elongated. Degree of fill 1–5%
53455–3460Panna Formation/Paleocene–early EoceneSandstone and silty shaleMonophase secondary inclusions seen along the secondary trails. Size varies from 2 to 6 µm, and shape is rectangular, fusiform and elongated.
63685–3690Panna Formation/Paleocene–early EoceneShaley siltstoneBi-phase secondary inclusions in cements. Size varies from 3 to 8 µm, and shapes are rectangular and elongated. Degree of fill 10–20%
73495–3500Panna Formation/Paleocene–early EoceneSandy siltstone and shaleBi-phase secondary inclusions concentrated along the secondary fractures in quartz and feldspar grains. Size varies from 5 to 17 µm, and shapes are irregular and elongated. Degree of fill 10–20%
81345–1350Mukta Formation/early OligoceneLimestone and shaleBi-phase secondary inclusions in cements. Size varies from 5 to 12 µm, and shapes are rectangular, irregular and elongated. Degree of fill 5–10%
91355–1360Mukta Formation/early OligoceneLimestoneBi-phase secondary inclusions concentrated along the annealed fractures in sporadic feldspar grains, as well as in cements. Size varies from 2 to 5 µm, and shape is irregular and elongated. Degree of fill 2–5%