Genesis Analysis and Logging Identification of Jurassic Yan 8 Poor Thin Oil Layer in Yongning Oilfield
In order to determine the genesis of Jurassic Yan 8 poor thin oil layer in Yongning oilfield,based on the data of drilling,logging,oil test and production,analysis and laboratory analysis,this paper has carried out a genetic analysis of the thin oil layer with a delay of Yan 8 difference.The results show that the formation of Jurassic Yan8 differential thin oil layer in Yongning oilfield is mainly a favorable reservoir poor thin oil layer controlled by the combination of factors such as the sedimentary microfacies and the conditions of storage and transportation.Specifically,the Yan 8 poor thin oil layer is mainly concentrated in the development area of riverway sand-body interlayer,the high part of structure and the good cover layer area of overlying strata.At the same time,according to the characteristics of the poor thin reservoir in the study area,a method to identify the combination factors of upper and lower oil reservoirs by logging secondary interpretation is established,and the identification plate of the thin oil reservoir with a delay of Yan 8 poor is established.The identification results are in good agreement with the oil test results.
Yongning oilfieldYan 8poor thin reservoirthe cause of formationidentification method
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