Oil & Gas Geology ›› 2006, Vol. 27 ›› Issue (2): 239-243.doi: 10.11743/ogg20060215

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Quantitative division of flow units in Panguliang Chang 6 reservoir,Jing'an oilfield

Shi Chengen1,2, Xie Wei1, Sun Wei1, Liang Xiaowei2, Yan Lin3   

  1. 1. State Key Laboratory for Continental Dynamics, Northwest University, Xi'an, Shaanxi, 710069;
    2. Petroleum Exploration and Development Research Institute, Changqing Oilfild, PetroChina, Xi'an Shaanxi, 710021;
    3. Exploration & Development Research Institute, PetroChina, Beijing, 10083
  • Received:2005-12-02 Online:2006-04-25 Published:2012-01-16

Abstract:

Taking Panguliang Chang 6 reservoir in Jing'an oilfield as an example,six parameters,including reservoir thickness,porosity,permeability,shale content,flow-zone index,and the product of reservoir thickness and porosity,are selected for quantitative division of flow units,based on comprehensive quantitative analysis and evaluation of sedimentary microfacies and reservoir.Panguliang Chang 6 reservoir is finely divided into 15 sublayers,and all the sandbodies can be grouped into 4 types of flow units,including E,G, M and P,by using high resolution sequence stratigraphy.The results show that the bottom of Panguliang Chang 61 and the top of Panguliang Chang 62 are the major pay zones of Panguliang Chang 6 reservoir in the study area,and all the flow-unit types are well correlated with lithologies,physical properties,sedimentary microfacies and productivity of the reservoir.The selected values of parameters,comprehensive evaluation functions and indexes for the flow unit division can truly and objectively reflect the geologic features of low permeability and low porosity reservoir,such as poor poroperm characteristics and strong heterogeneity,and can meet the accuracy requirements of flow unit evaluation and division for this kind of reservoir.

Key words: flow unit, cluster analysis, regression analysis, discriminant function, plane distribution, Panguliang Chang 6 reservoir

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