Abstract

Small diameter (1.69 inch) Continuous Spinner Flowmeter Tool (CFJ) is commonly deployed by Logging Services of ONGC in on-shore fields during Production Logging (PL) operation to measure flow rate of fluid in producing/injection wells. It is observed from field experience that spinner responses of such tool are sometimes unusual and at times bizarre in a deviated producer well, flowing with two-phase at low flow rate. Flow meter logs indicate an apparent negative flow (flow reversal) against the producing zone though the production is confirmed from Temperature log and surface data. True volumetric estimation of producing fluids under such circumstances is affected by non-representative flow meter data and often the log interpretation is subjective.