Abstract
This paper based on the field outcrop ,core data, logging data , physical property data and testing data to research the weathering crust of the deep volcanic in xujiaweizi depression. Take red clay layer that developed on the top of volcanic rock as the identification mark, and take the logging response characteristics of volcanic rock weathering crust as division standard, to research weathering crust of volcanic rock. Results show that recognized 31 wells that developed volcanic rock weathering crust of deep K1yc1 and K1yc3 volcanic of xujiaweizi depression that mainly distributed in Xuzhong and Anda region. Find that the main components of weathering crust are composed of rhyolite, volcanic breccia and tuff, and divide out dissolution and disintegration belt that are in conformity with the actual gas reservoir exploration position.
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