Lithologic Reservoirs ›› 2017, Vol. 29 ›› Issue (3): 132-139.doi: 10.3969/j.issn.1673-8926.2017.03.016

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Reservoir architecture of fan delta front and its oil-control models: a case of Eh3Ⅳ31reservoir in Zhaowa block of Zhaowa Oilfield, Biyang Depression

LI Yan   

  1. No. 1 Oil Production Plant, Henan Oilfield Company, Sinopec, Tongbai 474780, Henan, China
  • Received:2016-08-08 Revised:2016-10-11 Online:2017-05-21 Published:2017-05-21

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Abstract: In order to reveal the architecture characteristics of fan delta front reservoir and its control effects on the migration of oil and water, the data of core, well logs and production, were used to analyze the reservoir architecture and its controls on the remaining oil of Eh3Ⅳ31 in Zhaowa block based on the theory of fluvial facies reservoir architecture. The results show that the Eh3Ⅳ31 reservoir was divided into seven fifth-level architectural units which were separated by muddy interbed, calcitc-cement interbed and muddy sandy-conglomerate interbed. According to the qualitative and quantitative identification criteria of single subaqueous distributary channel or bar, the size, spatial morphology and distribution of the fifth-level architectural unit were defined under the isochronous stratigraphic framework of the fifth-level architectural unit. There are three kinds of oil-control models. The residual oil under the longitudinal and lateral facies-change oil-control models is mainly distributed in the middle and upper part of the subaqueous distributary channel and low permeability zone of non-channels, while the residual oil under the unstable interbed oil-control model is mainly distributed in the lower part of the interbed. This study is of great significance to improve the oilfield development effect.

Key words: tight reservoirs, hydraulic fracturing, joint denoising, energyfocusing locating, integrated interpretation

CLC Number: 

  • P618.13
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