The 25-year-old saved a last-minute penalty in the opening day against Stoke City to secure of the first of three 1-0 wins.
Mignolet believes his debut display has been the catalyst for his early fine form at the club and also feels it has helped him settle into his new surroundings.
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"It boosted my confidence and it was a very special moment. Because of the save we won the game and it doesn't really happen often that as a goalkeeper you can be so decisive - especially in your first game.
"When you join the club as a new goalkeeper you want to do well in the first few games you play; keeping three clean sheets helped me to settle and also my confidence. It's a good way to start."
Mignolet has also hailed the club's other summer recruits, with the likes of Mamadou Sakho, Tiago Ilori and Victor Moses all joining near the end of the transfer window.
He continued: "I saw back in Belgium when I was on international duty that the club also signed three more players at the end of the transfer window, which is always good to get competition inside the dressing room.
"We have a very good squad at the moment to go ahead and play the remainder of the season. It's a confident feeling looking at the table. I saw it on the television when I came back from Belgium."
"We've got three wins from the first three games played, so hopefully we can continue on that, progress and manage to play the coming games at the same level as we did the first couple of games."