Lithologic Reservoirs ›› 2014, Vol. 26 ›› Issue (3): 17-21.doi: 10.3969/j.issn.1673-8926.2014.03.004

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Analysis method of sedimentary microfacies by combining three facies

LIU Baoguo1， CHEN Shan2   

  1. 1. North China Branch Company， Sinopec， Zhengzhou 450006， China； 2. College of Energy Resources, China University of Geosciences， Beijing 100083， China
  • Online:2014-06-06 Published:2014-06-06

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Abstract:

Traditional sedimentary microfacies of third-order sequence is too large to guide the reservoir prediction. A method of combining ancient landform, seismic attributes and sand percentage was proposed to analyze sedimentary microfacies and describe the advantageous thin reservoir distribution. The high-frequency sequence boundary can be interpreted on frequency division section by referring to the high-frequency sequence division on single well. Seismic facies of high-frequency sequence was chosen under the control of ancient landform graph. By analyzing the sandstone percentage figure, the sedimentary microfacies figure was obtained. In this figure, the sedimentary microfacies boundary is controlled by boundary of seismic attributes, and the interior of the sedimentary microfacies is described by contour of sandstone percentage. Comparing with traditional sedimentary facies ideograph, this figure is more quantitative for having the external form and internal structure. It can be used to analyze the possible location of advantageous reservoir and indicate the dessert area. It makes reservoir prediction more real and believable.

Key words:  dolomitestones, reservoir characteristics, controlling factors, Penglaiba Formation, Yubei area

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