The variation of the production rates of oil and gas fields can be described by means of mathematical model or accreting curve.

Whether in an individual coal pit, oil, or gas field, a nation or the planet as a whole, fossil fuel reserves and production tend to follow a bell curve over time.

Because it can not predict the future index, this paper combine the injection-production-curve method with HCZ model, find the method of predicting steam injection and heavy oil production.