Complex scenarios for the trapping of oil and gas against faults can often be observed in multi-pay (multi-carrier) fields. Understanding hydrocarbon migration in such systems can be extremely dificult due to complex spatial variations in the sealing and conductive capacity of faults separating carriers of different ages. The analysis of multi-pay migration systems therefore requires the use of computerised simulation techniques. Here we describe such a technique which incorporates fault sealing properties due to the effects of clay smearing which is widely recognised as one of the main processes controlling fault sed capacity in clastic sequences.


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