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New fluids prevent formation damage to Tarim sandstones

05/19/2008
Researchers at China University of Petroleum have developed new drilling and completion fluids to minimize damage in Jurassic sandstones.This work addresses the characteristics of geological structure, lithology, permeability, porosity, and mineral components of a typical high-pressure, low-permeability, dense reservoir formation in China’s Tarim oil field.The main types of damage in these low-permeability formations are water-blocking and stress sensibility.Numerous studies have shown that the extent of water-blocking damage ranges from 70% to 90%,1-5 and stress-sensitivity damage ranges from 25% to 60%.6In a laboratory setting, China University of Petroleum developed new low-perme...
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