Reservoir chloride concentration and injection ratedata have been used to identify injection return flowpaths in the reservoir. General trends of chloride andinjection rate with time were isolated from theirrespective short-term variations using the wavelettransformation approach. Multiple regressiontechniques were then used to correlate the isolatedshort-term variations in chloride with correspondingshort-term fluctuations in injection rates andsubsequently to quantify the degree of connectivitybetween injectors and producers. Data fromPalinpinon-I field in the Philippines were analyzedusing the outlined method and results were verifiedsuccessfully against tracer test data and qualitativefield observations.Results of analysis of chloride and injection ratedata from Dixie Valley field in Nevada illustratedthat multilinear modeling is not suitable for analyzingdata sets that lack sufficient time variability or“texture”.
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