Please ID this snake

[sid.safari]

Hi,

I photographed this snake in a small pond in India.

I believe it might be a keelback or Ratsnake or some other kind of water snake.

I need a herp expert to confirm.

Thanks in advance.

https://preview.ibb.co/fx8QuJ/5_G4_A0930_Edit_Edit.jpg (https://ibb.co/kDVuod)