The phrase "lies comfortably" is correct and usable in written English.
You could use it to describe someone or something in a relaxed, comfortable position. Example: After a long day, she lay down on her bed and comfortably rested her head on the pillow.
Are you lying comfortably in this bed of cliches?
Then I was lying comfortably enough on the floor, propped up against the wall.
Wigan lie comfortably fourth in League One, Crewe last but not in the least worried.
Will Schoenberg lie comfortably with Little Richard?" If truth be told, the result may not always have been everyone's cup of tea.
It had a surplus of overhead space, and in some early models a six-foot officer could lie comfortably across the front seat.
The pro club that drafted him, the Chicago Bulls, played its part in positioning him in the nation's heart and heartland: Chicago offered a big-city market that lay comfortably between the coastal poles of American culture, LA and New York.
Nineteen months after my stroke, as I lay comfortably numb on an operating table in Cleveland, with four catheters running from my groin into my heart, I heard the sound of my pulse on the monitor shift from Miles Davis to Johann Strauss.
We lapped the pool, first with goggles, then without, dived through hoops, swam upside down and practised holding an exhaled breath so we could lie comfortably on the bottom for long enough to pose and preen for photographer Al. (Note: you are a more convincing mermaid if you can look like you're having fun).
Picture this creature, this clod, this reader, as lying comfortably in a hammock, yawning and easily distracted, a glass of iced tea by his side, half a dozen light novels and a magazine or two right where he can reach them, a portable television set well within his vision, the sun shining lazily and a golden sleepy haze surrounding him.
