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- W2390121983 abstract "Interval Chang 81 was regarded as shallow lake sedimentary environment in Ordos basin,and the basin had a more gentle bottom morphology and more shallow water body in Shanbei area.The Chang 81 reservoir is investigated by means of well-logging,core properties,thin sections for reservoir types,temporal-spacial distribution,lithology and reservoir physical property.It′s showed that the area main developed underwater distributary channel sandstone and mouth bar sandstone with thin monolayer,high shale content,significant multiply cyclicity,poor continuity in vertical and longitudinal direction and wide distribution.The sandstones is lithic feldspar and feldspar lithic sandstone,which are regarded as packsand and hone.The reservoir is regarded as low porosity and low-extra-low permeability reservoir as to the poor physical property.Analysis shows that there are 3 reasons why this kind of sand body formed.First,the study area was far away from the provenance,which led to the insufficient supplication.Second,water was shallow,the bottom morphology is gentle and the lake shoreline spread widely.In addition,the water power of lake and river was weak.Therefore,in small times of lake level lifting process,see-saw type sedimentation model was formed in the Chang 81 sandstone." @default.
- W2390121983 created "2016-06-24" @default.
- W2390121983 creator A5014611509 @default.
- W2390121983 date "2013-01-01" @default.
- W2390121983 modified "2023-09-22" @default.
- W2390121983 title "Characteristics and Genetic Model of Sand Body Type in Shallow Gentle Slope from Chang 8_1 in Shanbei Area" @default.
- W2390121983 hasPublicationYear "2013" @default.
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