西南石油大学学报(自然科学版)

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Flow Units Classification Based on Reservoir Architecture and Its
Influence on Reservoir Development

Xiong Guangqin1, Liu Li2   

  1. 1. Geoscience Institute of Jiangsu Oilfield,SINOPEC,Yangzhou,Jiangsu 225009,China
    2. School of Geoscience and Technology,Southwest Petroleum University,Chengdu,Sichuan 610500,China
  • Online:2014-06-01 Published:2014-06-01

Abstract:

Reservoir heterogeneity is severe and fluid flow is very complex in delta reservoir,which limits the reservoir
development. Taking E1 f 43 reservoir of Nanhu Oilfield as an example,flowing barrier recognition method based on reservoir
architecture and flow unit classification method based on multiparameter cluster analysis and stepwise discriminate analysis
are used. Flow barrier distribution and flow unit development rule are studied with the above methods and development data.
Connection of different flow unit composite models is analyzed and the influence of flow barrier and flow difference on oil
development is summarized. The study revealed that:(1)developed two kinds of reservoir sandbodies,sheet sand and stripped
sand. In stripped sand,water injection is usually invalid because the injection well and oil well are separately in sand and flow
barrier. This forms remaining oil.(2)Developed 5 types of flow units and types II and III are the main types.(3)There are 5
different flow unit composition model in connected sand bodies which have different connectivity,which form flow difference
surfaces inside connected sand bodies and weaken the permeability. These surfaces limit the reservoir development and enrich
remaining oil.

Key words: Key words:reservoir architecture, flow unit, flow barrier, flow difference, delta