The effect of future increase in production on current market equilibrium
A key distinction is whether the good is storable.

Example 1: Milk (non-storable)

Q: Imagine that there is new technology being developed that will increase the supply of milk ten years from now. What will happen to the supply of milk today?

A: Nothing. Each supply and demand curve is specific to the time period.

Example 2: Oil (storable)

Let's assume oil producers currently have access to oil reserves that they are voluntarily leaving in the ground. That is, firms are effectively storing oil (by leaving it in the ground).

In such a case, increasing the supply of oil in the future is similar to increasing the supply of oil today. You can draw from future supply by storing less today.

Some intuition:

Imagine you have 10 cookies and were planning on eating 5 today and storing 5 to eat tomorrow.

Q: What happens to your cookie supply today if I tell you that I'll give you another 4 cookies tomorrow? Will eat 5 cookies today and 9 tomorrow?

A: No. You'll store fewer cookies for tomorrow.

If you're storing a good for the future, an increase in future supply will increase supply today.