An innovative technique for estimating water saturation from capillary pressure in clastic reservoirs

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dc.contributor.authorAdeoti, L
dc.contributor.authorAyolabi, E.A
dc.contributor.authorJames, L
dc.date.accessioned2019-09-20T14:54:45Z
dc.date.available2019-09-20T14:54:45Z
dc.date.issued2017
dc.descriptionStaff publicationsen_US
dc.description.abstractA major drawback of old resistivity tools is the poor vertical resolution and estimation of hydrocarbon when applying water saturation (Sw) from historical resistivity method. In this study, we have provided an alternative method called saturation height function to estimate hydrocarbon in some clastic reservoirs in the Niger Delta. The saturation height function was derived from pseudo capillary pressure curves generated using modern wells with complete log data. Our method was based on the determination of rock type from log derived porosity-permeability relationship, supported by volume of shale for its classification into different zones. Leverette-J functions were derived for each rock type. Our results show good correlation between Sw from resistivity based method and Sw from pseudo capillary pressure curves in wells with modern log data. The resistivity based model overestimates Sw in some wells while Sw from the pseudo capillary pressure curves validates and predicts more accurate Sw. In addition, the result of Sw from pseudo capillary pressure curves replaces that of resistivity based model in a well where the resistivity equipment failed. The plot of hydrocarbon pore volume (HCPV) from J-function against HCPV from Archie shows that wells with high HCPV have high sand qualities and vice versa. This was further used to predict the geometry of stratigraphic units. The model presented here freshly addresses the gap in the estimation of Sw and is applicable to reservoirs of similar rock type in other frontier basins worldwide.en_US
dc.identifier.citationAdeoti, L., Ayolabi, E. A., & James, L. (2017). An innovative technique for estimating water saturation from capillary pressure in clastic reservoirs. Journal of African Earth Sciences, Vol.135, 41-53pp.en_US
dc.identifier.urihttps://ir.unilag.edu.ng/handle/123456789/5870
dc.language.isoenen_US
dc.publisherJournal of African Earth Sciencesen_US
dc.relation.ispartofseriesJournal of African Earth Sciences;Vol.135
dc.subjectWater saturationen_US
dc.subjectJ functionsen_US
dc.subjectLeverette-J functionsen_US
dc.subjectReservoiren_US
dc.subjectCore dataen_US
dc.subjectPseudo capillary pressure curvesen_US
dc.subjectResearch Subject Categories::TECHNOLOGYen_US
dc.titleAn innovative technique for estimating water saturation from capillary pressure in clastic reservoirsen_US
dc.typeArticleen_US
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