Lukaku struck in victory at West Ham United.
Martinez said: "He’s a thinker, a real knowledgeable man. He is someone who looks at games in a very different way and is like a manager in the way that he looks at movement.
"Sometimes you have to look at experience and at this stage it’s perfect for both clubs. Chelsea know that Romelu will be looked after, allowed to grow. I’m sure Romelu will be very important for whatever team he plays for in the next 10 or 15 years."