Oil & Gas Geology ›› 2009, Vol. 30 ›› Issue (2): 195-202.doi: 10.11743/ogg20090210

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Vertical zonation of chemical characteristics of oilfield water in the Songliao Basin

Lou Zhanghua1,2, Li Mei1,2, Jin Aimin1,2, Zhu Rong1,2, Tian Weizhuo1,2, Zhang Huiting1,2   

  1. 1. Institute of hydrology and water resources engineering, Zhejiang University, Hangzhou, Zhejiang 310028, China;
    2. Research centre of Oceanology, Zhejiang University, Hangzhou Zhejiang 310028, China
  • Received:2008-02-13 Online:2009-04-25 Published:2012-01-16

Abstract:

The influences of most factors on chemical characteristics of oilfield water change with the increase of burial depth,leading to the vertical zonation of oilfield water.According to the changes of groundwater salinity and Cl- concentration,five typical hydrochemical profile units could be divided from the shallow to the deep part,including meteoric water infiltration fresh zone (zone A);near surface evaporative concentration zone (zone B);fresh water from mudstone compaction (C1) and concentration zone by mudstone compaction and water-seepage (C2);clay mineral dehydration fresh zone (zone D); and deep concentration zone from seepage (zone E).

Key words: chemical characteristics of oilfield water, influential factors, vertical zonation, the Songliao Basin

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