Analyzing Rate Data from Permanent Downhole Gauges


Himansu Rai







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The wavelet processing algorithms developed for processing permanent downhole pressure data by Athichanagorn et al. (2002) and further improved by Khong (2001) were investigated for their suitability in processing permanent downhole rate data. An important difference was observed in the processing of step outliers between pressure and rate data. Four new approaches for accurate and reliable identification of transient breakpoints were investigated. The possibility of rate data aiding in improved transient identification was also investigated in one of the new methods. A significant improvement in screening out small or false breakpoints while retaining the true breakpoints was observed in some of the methods. Further, the impact of continuous rate data measurements on well test interpretation was investigated.

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