LIBYAN GAS COMPOSITION ANALYSIS AND PREDICTION

Abstract

Gas process or refrigerate always requires specific gas details i.e. gas composition. Generally, types of gas or differentiating between gases depend on composition. The main aim of this study is to evaluate and predict the Libyan gas composition utilizing the triangle plots. The gas composition data (313 old +60 last) collected for most of Libyan reservoirs. Moreover, getting a relation between gas molecular weight and (C1 + C2) and hence to find whole other compositions. The average value of every gas component was estimated including the non-hydrocarbon gases. Nevertheless, the isomers and normal structure of C4 and C5 were also obtained.

It is concluded that the old collected data matched and very close to the new or last collected data. However, the gas composition can be easily obtained if gas molecular weight (measured or estimated) at different separator pressure of oil and associated gas.