简介:Inrecentyears,alotoflow-resistivityreservoirswerefoundinBohaibay,andmuchofthemhadhighproductivitybytesting,Soitismoreandmoreimportantforustoidentifyandevaluatethelow-resistivityreservoirs.Accordingtoanalysesofloggingfeaturesandgenesisinthesereservoirs,wehavedevelopedsomeidentifyingmethodssuitableforBohaiBay.usingthesemethods,loggingdataofsmoeoldwellsarecheckedandanalysed.
简介:用TSQ-70GC/MS/MS色质仪分析了珠江口盆地100余个原油和生油岩样品,发现部分原油样品具有异常丰富的ααα-C29甾烷(20S)异构体。国内外许多学者认为甾烷ααα-C2920S/(20S+20R)值是最有效的成熟度指标,只与成熟度有关,其热成熟平衡值为0.50-0.55。珠江口盆地有部分油样甾烷ααα-C2920S/(20S+20R)值异常之高,最高达0.67,已超过其热平衡值,已超过了当地成熟、过成熟生油岩样品值。确认油源之后,发现离生油凹陷越远,运移距离越大的原油,其甾烷ααα-C2920S/(20S+20R)值越大。因此,ααα-C2920S(20S+20R)不仅与成熟度有关,还与运移距离有关。