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
Abstract
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.
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。
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