Wellbore packer with expandable metal elements

A method comprising:

• positioning a wellbore packer system within a wellbore, the wellbore packer system comprising:
• an expandable metal sealing element positioned around a first portion of a mandrel of the wellbore packer system;
• an elastomeric sealing element positioned around a second portion of the mandrel;
• and
• a support ring positioned around a third portion of the mandrel between the expandable metal sealing element and the elastomeric sealing element to provide temperature isolation to the elastomeric sealing element;
• applying, by the wellbore packer system, a seal-setting force to the elastomeric sealing element of the wellbore packer system to generate a short-term seal;
• and
• maintaining, by the wellbore packer system, the seal-setting force for a predetermined amount of time to generate a long-term seal from the expandable metal sealing element of the wellbore packer system.

A packer comprising:

• an expandable metal sealing element positionable around a first portion of a mandrel to form a long-term seal within a wellbore in response to exposure of the expandable metal sealing element to wellbore fluid;
• an elastomeric sealing element positionable around a second portion of the mandrel to form a short-term seal within the wellbore in response to receiving a seal-setting force;
• and
• a support ring positionable around a third portion of the mandrel between the expandable metal sealing element and the elastomeric sealing element to provide temperature isolation to the elastomeric sealing element.