**Acknowledgements**

**Figure 7.** Isotopic composition of methane and ethane in natural gases of the western and eastern Nile Delta. The ma‐ turity line is according to Berner and Faber [35]. The terrestrial organic matters indicate the maturity of the source rock

**Figure 8.** Isotopic composition of ethane and propane in natural gases of the western and eastern Nile Delta. The ma‐

Isotopic compositions of ethane and propane from the west and east Nile Delta samples proved their mixing origin and derivation from terrestrial organic matter with a source rock maturity

in vitrinite reflectance measurements

36 Advances in Petrochemicals

turity line is according to Berner and Faber [35].

between 0.1% and 2.0% Vitrinite Reflectance measurements.

The author wish to express the deepest gratitude to the management of the Western Desert Operating Petroleum Company (Wepco) and Belayim Petroleum Company (Petrobel) for providing test gas and condensate samples to accomplish this work. Sincere thanks and gratitudes are also due to the Egyptian General Petroleum Corporation (EGPC) for granting the permission to publish this paper.
