In a large skillet, brown chicken breasts in oil until golden. Remove from skillet and set aside.
Saute celery and onion for 2 to 3 minutes, until translucent. Add cream of chicken soup, cream of celery soup, Worcestershire sauce, soy sauce and water. Heat until mixture is hot and bubbly. Add uncooked rice and mushrooms and stir all together to mix well.
Pour mixture into a 9x13 inch baking dish, place browned chicken on top and bake, covered, in preheated oven for about 1 1/2 hours.