Juan Jose Gomez Caro, Angelica María Carreño Parra, María del Rosario P´érez Trejos, E. Pérez, Luis Fernando Peña Peña, J. Henao, C. Ríos, Luz Helena Rueda Acevedo
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引用次数: 0
摘要
在哥伦比亚上马格达莱纳河谷盆地(UMVB)的Dina油田，在Dina Norte 27和Dina Norte 37井的分析层段中，发现了Honda组(La Victoria组-早中新世)底部的砂岩，这些砂岩由未成熟碎屑岩组成，由于火山碎屑、长石/斜长石和不稳定矿物的存在，被划分为岩屑岩/长石岩屑岩。由于选择不良和碎屑的低圆度，它们在质地上不成熟。提出了以下成岩作用顺序:轻度压实作用;在油气运移之前，伊利石/蒙脱石碎屑粘土包覆颗粒，不稳定矿物溶解，沸石(黑石)沉淀，非铁方解石水泥部分沉淀，最后是粘土的氯化作用。
Petrofacies and diagenetic processes of la Victoria formation (Early Miocene), Dina oil field, upper Magdalena valley basin, Colombia.
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 selection 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 nonferroan calcite cement and finally chloritization of clays prior to hydrocarbon migration.
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