In the present work, the cement and/or matrix, pores, and grains present in sandstones were quantified by tele-petrography. The selected sandstones come from the superficial formations of Ivorian onshore basin and the deep formations of offshore basin. A total of six sandstones, three from each part of Ivorian basin, were analyzed. The tele-petrographic analysis consisted of processing the images of these sandstones taken under the natural light from petrographic microscope to the R software using the «terra» package. The results show that the quantification of sandstone components depends on the magnification of the microscope image, the grain size, and the sorting. At low and medium magnifications, a small number of images per rock is sufficient to evaluate the proportions of the components. At high magnifications, however, a large number of images are required as they tend to overestimate the proportions of grains at the expense of other components (porosity, cement, matrix) if the grains have a poorly sorted. The presence of phenocrysts accentuates these variations. However, if the sandstones have a well sorting, the proportions of components hardly vary from one image to another, whatever the magnification. The density curves and histograms reveal that the number of components on these curves depends on the proportions; the higher the proportion of a component the better it is represented. Low proportions remain invisible on the density curves. Remote sensing is therefore promising for the evaluation of the petrophysical properties of reservoir rocks.

Knowledge of the Continental Terminal in the locality of Bingerville was based on 147 cuttings. Theses cuttings were the subject of sedimentological and diagraphic studies in order to establish complete lithostratigraphy in this locality which rests on the Precambrian basement. The results highlight four lithologies: sands, mud, gravelly sands and sandy gravels. The mineralogy of the sediments consists mainly of quartz with the exception of mud. These sediments are made up of variety color. The GR values of sandy and gravelly sediments are usually less than 20 API. They vary between 20 and 40 API for sediments containing kaolin pebbles. The mud are rather clayey siltstones which are of two types: variegated kaolin and grey-dark clayey siltstones. The mean GR values of these argillaceous siltstone are 60 API with sometimes extreme values (100 API

This study concerned the cuttings of two boreholes on the west margin of Abidjan. The cuttings were subjected to a chemostratigraphic analysis in order to have a clear knowledge of the composition and distribution of the chemical elements of sediments with particles less than 63µm from the Albian. It was a question of determining the different proportions of major elements and trace elements by the method of the X-Ray Fluorescence (XRF). The purpose is to define the minerals likely to be found in the sediments. Thus, it turns out that these sediments are both rich in heavy minerals and in clay minerals. These minerals could be illite, chlorite, kaolinite, potassium feldspars, mica, zircon, titanium, ritule, anatase linked to variable levels of K, Rb, Zr, Ti, Al, Ga and Mg. the variation in the elements shows the presence of two sources, provenance of sediment. The first source is rich in heavy elements and the second in potassium and magnesium. The characteristics of these sediments show the presence of a transgression phenomenon on the passage from sequence 1 to sequence 2.