Abstract
The authors present a case study of using semi-quantitative oil fingerprinting technology to correctly back allocate production of individual sand layer in commingled well. A large number of oil samples were collected over time and analyzed by gas chromatography (GC) for their oil fingerprints. The results showed that the production allocation of single layer in two-layer commingled well and the hydrocarbon concentrations of commingled oil were in a liner relationship. However, the production allocation of single layer and oil GC fingerprint parameters were in curvilinear relationship. The semi-quantitative oil fingerprinting technology was suitable for the case of two-layer commingled well, and three-layer commingled well with larger gas chromatography differences among oil of each layer.
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