Mapping inter-well porosity using tracers with different transport properties

A method of reconstructing inter-well porosity of a hydrocarbon-bearing reservoir using Type 1 tracer breakthrough data and Type 2 tracer breakthrough data, the method comprising:

• obtaining an initial reservoir model;
• performing reservoir simulation using the initial reservoir model to predict hydrocarbon production rate, water production rate, Type 1 tracer breakthrough data, and Type 2 breakthrough data from a producer well;
• obtaining a real field hydrocarbon production rate, real water production rate, real Type 1 tracer breakthrough data, and real Type 2 tracer breakthrough data from the producer well;
• and
• performing data assimilation by comparing real field production, real field Type 1 tracer breakthrough data, and real field Type 2 tracer breakthrough data with the predicted production, the predicted Type 1 tracer breakthrough data, and the predicted Type 2 tracer breakthrough data obtained from the reservoir simulation using the initial reservoir model.