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Mesozoic volcanic reservoir characteristics in Niuxintuo area of Liaohe Depression

Mu Deliang(1.Exploration and Development Research Institute,Liaohe Oilfield Company,CNPC,Panjin 124010;2.School of Geoscience,Nanjing University,Nanjing 210093,China)  
The volcanic rock is mainly the high alkaline kalium-calcium series and alkaline calcium series in this area.The volcanic rock series,rock type,lithology and earth's chemical characteristics represent the result of the extrusion force.The volcanic rock includes two types of fulgurites and oddment in the area.The main component of the fulgurites is rhyolite and andesite.The volcanic rock is mainly the volcanic breccias and tuff.The fulgurites are the main oil reservoirs.The structural activities are the reason of forming volcanics reservoir,and the type of rock and acidic liquid is the necessary condition.The lava reservoir porosity and permeability are determined by the size of fractures and secondary porosity.The primary pore isn't contributed to the reservoir.
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