LITHOLOGIC RESERVOIRS ›› 2015, Vol. 27 ›› Issue (5): 116-121.doi: 10.3969/j.issn.1673-8926.2015.05.019

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Application of seismic sedimentology to prediction of interbeds in dolomite reservoir: A case study of Penglaiba Formation in Yingmai 32 block of Tarim Basin  

Xiong Ran， Yang Cun， Luo Xianying， Qiao Zhanfeng， Cao Peng   

  1.  PetroChina Hangzhou Research Institute of Geology ， Hangzhou 310023 ， China
  • Online:2015-09-26 Published:2015-09-26

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Abstract:

The widely development of interbeds in dolomite reservoir of Penglaiba Formation increased the difficulty of remaining oil mining in Yingmai 32 block in Tarim Basin. Due to the small thickness of the interbed and the unclear distribution regularities, it is difficult to predict the interbed distribution in the study area. Under the guidance of seismic sedimentology theory, techniques such as 90° phase convert after spectrum inversion and strata slice in outcrop modeling were used to predict the distribution rule of interbeds in high frequency sequence stratigraphic framework. The result shows that spectrum inversion can improve the ability of thin layer resolution, and there is a better corresponding relation between seismic event and thin layer. The outcrop modeling determines the distribution rule of interbeds, and there is a better corresponding relation with well data, which can guide the prediction of interbed distribution. The prediction result shows that the interbeds distributed in the northeast of the study area, and they control the distribution of remaining oil. Finally, by well data verification, it proves that the interlayer distribution predicted by this method is accurate and reasonable.

Key words: diamictite, reservoir space, intergranular pore, Yingxi area, Qaidam Basin

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