Study of Some Physical and Chemical Properties of the Rock Samples Selected from Wells N 18 in the Field of Nasiriya and its Oil

Abstract

This study was based on that hydrocarbon compounds originating in the oil can be leaked from the reservoir of and oil rising to the surface through the different layers. This study followed up relied change concentrations of these compounds and concentrations of elements associated with the change as a way to track it's path rises of such material in a Well 18 (Al- Nasiriya Field) through rock samples taken from various depths along the column of the Well trying to find some kind of comparison between the change 1 Qw2`\`W2\ of focus and depth of the Well.The quantitative and qualitative analyses have been conducted of trace metals in the organic extract from the rock samples using Atomic Absorption Spectroscopy and these elements are sodium, potassium, chromium and nickel. Samples were digested using a mixture of nitric acid concentration of 20% and 20% HCl concentration and by (2:1) volume ratio. The organic content extracted from rock samples contains a compound N- Ethyl Carbazole only, as is clear from the analysis of chromatographic (GC) of the samples. Carbazole rise to the top of the well's column. Some physical and chemical properties of crude oil such as: specific gravity, specific weight API, water content and salt content were measured. Through these properties were found that the oil is considered of medium quality oils and relatively close to the earth's surface and thus it can be extracted with little cost.

Keywords: Crude Oil, Trace metals, Ethyl carbazole