Abstract

GOMEZ, Juan-J et al. PETROFACIES AND DIAGENETIC PROCESSES OF LA VICTORIA FORMATION (EARLY MIOCENE), DINA OIL FIELD, UPPER MAGDALENA VALLEY BASIN, COLOMBIA. C.T.F Cienc. Tecnol. Futuro [online]. 2020, vol.10, n.1, pp.33-44. ISSN 0122-5383.  https://doi.org/10.29047/01225383.120.

The sandstones at the base of the Honda Group (La Victoria Formation - Early Miocene), in the Dina Field, Upper Magdalena Valley Basin (UMVB) - Colombia, which are present in the analyzed interval of the Dina Norte 27 and Dina Norte 37 wells, are composed of immature clastic rocks classified as Litharenites / Feldspathic Litharenites, due to the presence of volcanic fragments, feldspar / plagioclase and unstable minerals. They are texturally immature due to poor sorting and low roundness of the detritus. The following sequence of diagenetic processes is proposed: minor compaction; grain coating by illite / smectite detritical clay, dissolution of unstable minerals, zeolite (heulandite) precipitation, partial precipitation of non-ferroan calcite cement and finally chloritization of clays prior to hydrocarbon migration.

Keywords : Diagenesis; XRD; SEM; Petrofacies; Zeolite; Heulandite; Honda Group; La Victoria Formation.

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