Petrographic studies of reservoirs, associated rocks and other petrologic analyses which may be performed, interpreted and integrated into conceptual, empirical and numerical models of reservoir quality and heterogeneity characterization and prediction, comprising:
a) Detailed, quantitative or qualitative petrographic descriptions using the PETROLEDGE System, embracing: sample identification, descriptive summary, structural, textural and fabric aspects, primary constituents, diagenetic constituents, pore types, diagenetic sequence, classification, provenance interpretation, depositional setting and diagenetic environment inferences.
b) Documentation of the major and most diagnostic features provided by six or more photomicrographs of each sample.
Feldspars grains dissolution and kaolinization in a turbidite reservoir sandstone. Photomicrograph with uncrossed polarizers.
c) Grain size distribution and modal class determination through measuring of 100 points per thin section.
d) Electron microscopy by backscattered electrons (BSE) with support of energy-dispersive spectrometry microprobe analysis (EDS) of a rock thin sections, including mineralogical and paragenetic (diagenetic sequence) interpretations, as well as digital photomicrographic documentation, including six photomicrographs with descriptive captions per thin section.
Dolomite crystals with iron zonation cementing dissolved and albitized feldspars grains in a Lower Tertiary sandstone. Backscattered electrons (BSE) image.
e) Scanning electron microscopy (SEM) by secondary electrons with support of energy-dispersive spectrometry microprobe analysis (EDS) of rock chip samples, including mineralogical and paragenetic (diagenetic sequence) interpretations, as well as digital photomicrographic documentation, including six photomicrographs with descriptive captions.
f) X-ray diffraction (XRD) of bulk rock samples (semi-quantitative), and / or of clay fraction (dried, glycolated, heated)X-ray diffraction (XRD).
g) Standard X-ray fluorescence (XRF) fusion bead analysis (10 major components, oxides and LOI):
h) Determination of synthetic diagenetic sequences of reservoir units, by the integrated interpretation of sets of samples analyzed through qualitative or quantitative optical microscopy. |
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