Caracterización mineralógica y petrográfica de la arenisca M1, de la formación Napo en el pozo Johanna Este 45, campo Johanna Este bloque Tarapoa

Abstract

The study of the mineralogical and petrographic characterization of the M1 sandstone of the Johanna Este 45 well, was carried out according to the analysis and interpretation of data obtained based on laboratory tests with the application of three methodologies used to identify the type in more detail. reservoir studied. According to the petrographic analysis, it was determined that the M1 sandstone in the Tarapoa block is a Quartzsarenite in its highest proportion, followed by a Subarcosa composition and to a lesser percentage a Sublitarenite composition. The combination between the grain size and the roundness of the grains defines the degree of textural maturity, Sandstone M1 is texturally mature, and mineralogically is classified as mature to supermature. X-ray diffraction analysis shows that M1 Sandstone is composed mostly of quartz and feldspar. In addition, the percentage of clay is lower and it is mainly made up of kaolinite. The Scanning Electron Microscopy analysis identified that Sandstone M1 is composed mainly of quartz, the main component of the rock skeleton and clay material mainly constituted by kaolinite, which occurs in pseudo-hexagonal plates in the form of books located mainly in the poral spaces.