Journal of Jilin University(Earth Science Edition) ›› 2015, Vol. 45 ›› Issue (1): 13-24.doi: 10.13278/j.cnki.jjuese.201501102

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Characteristics of Conglomerate Reservoir Architecture of Alluvial Fan and Its Controlling Effects to Reservoir Development:Taking Alluvial Fan Reservoir in Some Area of Northwest Margin of Junggar Basin as an Example

Chen Huanqing1, Liang Shuxian1, Shu Zhirui2, Deng Xiaojuan1, Peng Shouchang2   

  1. 1. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China;
    2. Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay 834000, Xinjiang, China
  • Received:2014-07-20 Published:2015-01-26

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Abstract:

Being one of the important kind of reservoir, conglomerate reservoir always was hotpot area to explorationists and developers of oilfield. Taking Lower Karamay Formation of some area in northwest margin of Junggar basin as an example, it characteristics of sedimentary facies quick changes and heterogeneity intensity. reservoir architecture characteristics were finely analyzed on the base of sedimentary facies studied. The reservoirs were carved into thirteen kind of architecture, such as, channel flow conglomerate, channel beach conglomerate, sandstone of inner belt of sheet flood, fine grained of inner belt of sheet flood, laminar flow conglomerate, sandstone of exterior belt of sheet flood, fine grained of exterior belt of sheet flood, braided channel, braided sandstone-conglomerate dam, sandstone of unconcentrated flow, fine grained of unconcentrated flow, streamflow channel, fine grained between streamflow channels. And channel flow conglomerate and laminar flow conglomerate and braided channel and braided sandstone-conglomerate dam take the leading roles. The results of reservoir architecture analyzed indicated development laws of different kind of architecture. Channel flow conglomerates extend like banding, and had thickness from two meters to eight meters. Laminar flow conglomerates are two meters to seven meters in vertical section. Braided channels are wide about eighty meters to four hundred meters. Braided sandstone-conglomerate dams take thickness about two meters to seven meters. All kinds of architecture are controlled by the sedimentary source of north and north-west directions. Reservoir architecture characteristics could finely reflect the properties of reservoir of heterogeneity and connectivity. And it has an important controlled function to oilfield development.

Key words: Junggar basin, Lower Karamay Formation, alluvial fan, conglomerate reservoir, reservoir architecture, oilfield development

CLC Number: 

  • P618.13

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