Lithologic Reservoirs ›› 2007, Vol. 19 ›› Issue (4): 116-120.doi: 10.3969/j.issn.1673-8926.2007.04.021

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Optimization of upward strata combination of second class oil layer in eastern south Ⅱ area of Daqing Oilfield

ZHANG Liqiu   

  1. No. 2 Oil Production Plant, Daqing Oilfield Company Ltd., PetroChina, Daqing 163414, China
  • Online:2007-12-15 Published:2007-12-15

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Abstract:

Polymer flooding of the first class oil layer is on the decrease in Daqing Oilfield, and the development techniques of the second class oil layer are in developing at present. The second class oil layer is characterized by decreased channel sand, increased sublayers, thinning single layer, low permeability. In order to enhance oil recovery, the strata combination is analyzed based on the study on layer selection criterion, deposition characteristics and the influencing factors. The thickness of the upward strata and the producer-injector spacing are determined, which will provide reference for the strata combination in this area.

Key words: braided river delta, swamp, sedimentary facie evolution, lake transgression, lake regression, Badaowan Formation

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