In windy conditions, which made it a scrappy contest, Mitch Duncan, Jimmy Bartel, Paul Chapman and Daniel Menzel all kicked two goals as the home side won 17.20 (122) to 6.7 (43).
Bartel and fellow onballers Joel Selwood and James Kelly were dominant in the middle of the ground, while Brad Ottens outclassed Dean Brogan in the ruck.
Power coach Matthew Primus placed a lot of men behind the ball, a tactic that limited his team's losing margin but meant it was rarely able to run the ball past half-forward (the inside-50 count finished at 72-34 in Geelong's favour).
Robbie Gray slotted two goals for Port Adelaide, while Matthew Broadbent tried hard to stem the flow.
The first quarter was a turgid affair, with both teams let down by poor skills.
When the siren finally ended it, after 27 minutes and 45 seconds of fumbles and turnovers, the scoreboard showed the Cats leading by seven points, 2.6 to 1.5.
The opening minutes of the second term weren't much better, although the match did briefly come to life when Gray soared over Corey Enright to snare a great mark.
He played on and narrowed the margin to one point, but from there it was all one way traffic in the other direction.
Hunt, Chapman, Stokes and Ling all bagged goals, and by half-time Geelong was 30 points up.
If the Cats had kicked straight - they had 6.11 on the board at the long break - the game would have been done and dusted.
Thanks to five goals in the third quarter, Geelong did have it wrapped up by the last change.
And the final term was more of the same, with the Cats cantering to yet another win at home.
Geelong 2.6 6.11 11.14 17.20 (122)
Port Adelaide 1.5 2.5 5.7 6.7 (43)
GOALS
Geelong: Chapman 2, Menzel 2, Bartel 2, Duncan 2, Johnson, Hunt, Stokes, Ling, Podsiadly, Ottens, Hawkins, Corey, Christensen
Port Adelaide: Gray 2, Westhoff, Stewart, Cornes, Hartlett,
BEST
Geelong: Bartel, Selwood, Kelly, Ottens, Ling, Chapman, Duncan
Port Adelaide: Boak, Pittard, Pearce, Gray, Broadbent
INJURIES
Geelong: Nil
Port Adelaide: Nil
SUBSTITUTES
Geelong: Harry Taylor replaced by Allen Christensen in the third term
Port Adelaide: Jarrad Irons replaced by Jason Davenport in the third term
Reports: Nil
Umpires: Stewart, Hay, Wenn
Official crowd: 22,420 at Skilled Stadium
