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This paper presents data analysis for a nondestructive direct and scattered gamma-ray method that measures the gas fraction variation in two-phase oil well production flows. The method is based on the classification of observation intervals for two-phase flow using statistical period estimations. The feature of informativeness estimates is obtained using the Kullback-Leibler divergence, which revealed the importance of the radiation source activity, the detector efficiency, and also the role of scattered gamma to be able to identify the moments of free-gas absence in the production flow which greatly affects the measurements. Furthermore, the formula for estimating gas fraction present in the oil-gas flow, which is the essential element for flow metering in the oil wells field is provided. |
