Oil & Gas Geology ›› 2005, Vol. 26 ›› Issue (6): 724-729.doi: 10.11743/ogg20050604

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Study of carrier system of typical gas reservoirs in China—taking Sulige gas field in Ordos basin as an example

Zhu Xiaomin1, Liu Chenglin1, Zeng Qingmeng2, Men Xiangyong3   

  1. 1. China University of Petroleum, Beijing;
    2. China University of Geosciences, Beijing;
    3. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing
  • Received:2005-09-27 Online:2005-12-25 Published:2012-01-16

Abstract:

For gas reservoirs in the fold-thrust belts of foreland basins and in rift basins,faults constitute the main carrier systems,and hydrocarbons migrate mainly in vertical direction with short migration distance and high delivery efficiency.While for lithologic gas reservoirs in craton basins and gas reservoirs in slope zones of foreland basins,sandbodies act as the main carrier system,and hydrocarbons migrate both laterally and vertically with relatively long migration distance and low delivery efficiency.Sulige gas field is of lithologic gas reservoirs in craton basin,its main carrier system is of sandbody type,with a few fault type and sandbody-fault type carrier systems.The sandbody carrier system can be subdivided into thick belt sandbody,thin belt sandbody and lenticular sandbody.The delivery capacity of carrier system varied with time.It peaked in 200-150 Ma during the strongest dissolution and faulting.At the critical reservoiring period(J3-K1),the framework of carrier system was high in the west and north and low in the east and south,and the major carrier system consisted of sandbodies,faults and fractures.Hydrocarbons migrated northwestward with high delivery efficiency.While in the post-reservoiring adjustment period(K2-Q),the framework of carrier system was basically high in the east and north and low in the west and south,and the major carrier system consisted of sandbody and fractures.Hydrocarbon migration efficiency was low and not evident.

Key words: carrier system, craton, foreland, rift, Sulige gas field, Ordos basin

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