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Understanding the role of bioturbation in modifying petrophysical properties: a case from well L5 of the third-member Paleocene Funing Formation (E1f3), Gaoyou Sag, Subei Basin, China by Jonathan Atuquaye Quaye; Zaixing Jiang; Chao Liu; Caspar Daniel Adenutsi; Stephen Adjei; Kwame Sarkodie; Yen Adams Sokama-Neuyam; Yanick Brice Lemdjou; Collen-Issia Uahengo is a Earth and Planetary Sciences article available to read on EtoBox.

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This study presents a detailed petrophysical characterization of bioturbated reservoir facies retrieved from well L5 of the most oil-productive third-member Paleocene Funing Formation (E 1 f 3 ). Two siltstones and two sandstone reservoir facies (Rf1, Rf2, Rf3, and Rf4), respectively, are tested and analyzed using petrographic, pressure decay porosimetry, pulse decay permeametry, and TOC techniques. The results indicate that Rf1 (fine-grained, light gray siltstone) is intensely bioturbated (BI = 5; 91-99 vol.%) by Palaeophycus and Taenidium and shows a 64.02% increment in burrow porosity. Rf2 (fine-grained, light gray siltstone) is intensely bioturbated (BI = 5; 91-99 vol.%) by Ophiomorpha, Planolites, and Taenidium with 34% porosity. Rf3 (fine-grained, brown sandstone) is intensely bioturbated (BI = 5; 91-99 vol.%) by Rhizocorallium and Taenidium and indicates a 49.6% burrow porosity increment. Rf4 (fine-grained, brown sandstone) is intensely bioturbated (BI = 5; 91-99 vol.%) by Ophiomorpha, Palaeophycus, and Taenidium with a marginal 4.36% porosity gain. Burrows permeability in all reservoir facies samples improves by approximately 59%, 38%, 52%, and 15%, respectively. The harmon

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Author

Jonathan Atuquaye Quaye; Zaixing Jiang; Chao Liu; Caspar Daniel Adenutsi; Stephen Adjei; Kwame Sarkodie; Yen Adams Sokama-Neuyam; Yanick Brice Lemdjou; Collen-Issia Uahengo

Publisher

Springer Science and Business Media LLC

Published

2023

Language

EN

Field

Earth and Planetary Sciences (Physical Sciences)