Kent captain Tammy Beaumont top-scored with 70 and shared a century stand on the opening day of the one-off pink-ball Ashes Test at the North Sydney Oval.
The 26-year-old hit nine boundaries in a patient 173-ball innings and shared a stand of 104 with captain Heather Knight.
The Dover-born batsman accelerated after the loss of Lauren Winfield (4 off 56 balls) before the hosts’ spinners made inroads.
Debutant leg-spinner Amanda-Jane Wellington got a ball to grip and take the outside edge of Beaumont before Knight (62) and Sciver (18) fell LBW to Jess Jonassen.
Australian all-rounder Ellyse Perry returned to take two wickets in the floodlit final session: Georgia Elwiss (27) and Sarah Taylor (29).
Katherine Brunt was the final wicket of the day as she cut Tahlia McGrath to Jonassen at point to leave Fran Wilson and Anya Shrubsole unbeaten at stumps with England on 235 for seven.
Kent spinner Laura Marsh is set to bat at number 10 on day two.