Rearrangement hopane: Molecular tracers for filling pathway in oil reservoirs

ABSTRACTBased on the analysis of C30*/C30H thermal stability, C30*/C30H feasibility in hydrocarbon-charging migration, the results show that C30*/C30H might not only show a good response to thermal maturity in mature to high mature oil. Comparing C30*/C30H parameters with methyl dibenzothiophene ratio (MDR), exposure/shielding alkyl dibenzothiophenes, found that the C30*/C30H parameters and two other parameters have great positive correlation, indicating that the C30*/C30H parameters are not only good thermal maturity parameters but also good in hydrocarbon-charging migration. Using C30*/C30H parameter tracer, Chang 7 oil reservoir group of hydrocarbon-charging migration direction in Longdong area appears as the main hydrocarbon charging in Hua Chi area. The oil migration directions are southwest and northeast, and hydrocarbon charging occurs by the wave surface filling migration; also, the oil has the characteristics of continuous filling. Preliminary results show that C30*/C30H parameter is an effective...