The French striker scored his 50th goal in Chelsea's colours in the 2-0 Champions League victory over Spartak Moscow in midweek and is in the best form of his career.
The former France international has scored eight goals so far this season and is so content at Stamford Bridge that he is already looking to extend his contract at the end of the season.
"It is the first time I have scored that many for any club but it is the first time I have spent more than two-and-a-half years at a club as well," said Anelka.
"It shows how happy I am at Chelsea. When I first signed here I knew had arrived at a big club and I wanted to stay as long as possible.
"I don't know what will happen in the future. After this season I have one more year on my current deal and I will see what will happen because you never know. But I am very happy here and I would be glad to sign for more years.