Geochemistry of Palaeozoic marine petroleum from the Tarim Basin, NW China: Part 3. Thermal cracking of liquid hydrocarbons and gas washing as the major mechanisms for deep gas condensate accumulations

► The Lungu giant Ordovician condensate represents a mix of early oil and late gas. ► Gas from oil cracking resulted in gas washing of the reservoir. ► The condensate pool contains dry gas, heavy oil, abundant aromatics and high wax.