The Portuguese coach, who joined the Blues 10 years ago, has steered the West London club into prime position to win this season's Premier League title.
However, the 51-year-old has warned other managers in the game that he intends to stick around for a long time.
Mourinho is quoted by The Mirror as saying: "For me, the situation is clear. I want to work, 15 or 20 more years at the top. When you reach the top, you want to stay at the top. That's normal.
"If, during this time, I do well enough to stay in a top level club, I will. If I don't do well enough, and my market changes and I only have smaller clubs waiting for me, I will.
"I don't think anyone likes to change from big to smaller, and from big expectations and projects to small ones. But I repeat, I want to work if I'm physically and mentally strong enough – which I expect to be – for another 15 to 20 years."
Chelsea, who top the Premier League by four points, face local rivals Queens Park Rangers on Saturday afternoon.