濮城油田为轻质油层,地层水矿化度高。由于该区有几套盐韵律层,且采用高比重泥浆钻进,泥浆侵入轻质油层较深,严重地降低了感应测井电阻率读数。加之该区岩性细、束缚水饱和度高达30～40％,导致油水层电性差别不大。因此,用一般测井解释方法计算的含水饱和度偏高,往往把油层解释为水层。本文采用三电阻率覆盖法及饱和度挖补法评价油水层,效果很好。 Pucheng Oilfield is a light oil reservoir, formation water salinity. Because there are several sets of salt rhythms in this area and drilling with high specific gravity mud, the mud intrudes into the light oil reservoirs, which seriously reduces the resistivity log readings. Coupled with the fine lithology, irreducible water saturation up to 30 ~ 40%, resulting in little difference between oil and water electricity. Therefore, the high saturation of water calculated by general log interpretation often interprets the reservoir as a water layer. In this paper, three resistivity coverage method and saturation digging method to evaluate the oil-water layer, the effect is very good.