Identification of Complex Fluid Properties in Condensate Gas Reservoirs Based on Gas–Oil Ratio Parameters Calculated by Optimization Mathematical Model

In the production development stages of volatile oil reservoirs and condensate gas reservoirs, especially in early production, phenomenon high gas–oil ratio often occurs. As a result, prediction results are greatly deviated from actual situation, which seriously affects implementation potential excavation increases operation for reservoirs. Therefore, accurate identification is key to improve efficiency However, due similar geophysical logging response characteristics gas, oil, light qualitative effect only based on conventional not ideal. we propose method calculate by introducing information use quantitative calculation identify layers. First, establish physical model formation components reservoir. Based this model, equations various tools evaluate correlation between equation logging. Then, comprehensively well an optimization mathematical solve objective function, obtain relative content natural movable parameters, finally result quantitatively fluid type. The application show that proposed can parameter accurately, consistent with testing data, provides technical support complex properties