Lithologic Reservoirs ›› 2017, Vol. 29 ›› Issue (6): 128-134.doi: 10.3969/j.issn.1673-8926.2017.06.016

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Interlayers of meandering river reservoir:a case from Qinhuangdao 32-6 oilfield

GAN Liqin, SU Jinchang, XIE Yue, LI Chao, HE Kang, LAI Youchun   

  1. Bohai Oilfield Research Institute, Tianjin Branch of CNOOC Ltd., Tianjin 300452, China
  • Received:2016-04-15 Revised:2016-06-06 Online:2017-11-21 Published:2017-11-21

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Abstract: To reveal the distribution rules of remaining oil and water flooded reservoir influenced by the meandering river reservoir interlayer, the interlayers' upper limit of physical property was obtained through the analysis of the physical parameters and the relation between the productivity index per-meter,and the choice of natural gamma,resistivity and thickness as the main sensitive parameters,calculate weight coefficients are obtained by using the grey correlation method,interlayer and comprehensive index discriminant chart. The application of the oil zone in the lower Minghuazheng Formation in the south area of Qinhuangdao 32-6 oilfield proves that the coincidence rate of the discrimination plate is upmost 96%. The adjustment is carried out at the bottom of the remaining oil retention zone and the top of the water flooded layer of the reservoir,and the production effect is obvious. In the meandering river reservoir interlayer development zone,the interlayer retards water cut rising rate of the production well;the formation of water flooding zone is easy to form in the interlayer non-developed area,which leads to the formation of remaining oil retention zone in the adjacent interlayer growth zone. The understanding will guide the potential tapping of productivity in the middle and late stages of oilfield development.

Key words: tight glutenite reservoir, pore structure, nuclear magnetic resonance, comprehensive diagenetic coefficient, reservoir quality factor, Baikouquan Formation, Mahu Sag

CLC Number: 

  • TE122.2
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