Multi-zone fracturing with full wellbore access

A system, comprising:

• a sleeve assembly comprising a collapsible baffle and a sliding sleeve disposed adjacent the collapsible baffle, wherein the collapsible baffle is moveable from a radially open position to a radially collapsed position;
• and
• a shifting device disposed on coiled tubing, the shifting device comprising:
• a mechanical shifting component comprising an engagement feature to activate the sleeve assembly to collapse the baffle;
• and
• an isolation component comprising a plug or ball shaped to seat in the collapsible baffle when the collapsible baffle is in the radially collapsed position, and wherein the sliding sleeve is moveable to expose ports providing access to a formation from inside a wellbore in response to force from the isolation component on the collapsible baffle;
• wherein the mechanical shifting component and the isolation component are attached to each other via the coiled tubing.

A method, comprising:

• releasably engaging a shifting sleeve disposed in a wellbore via a mechanical engagement feature of a shifting device disposed on coiled tubing;
• moving the shifting sleeve via the shifting device engaged with the shifting sleeve;
• collapsing a baffle from a radially open position to a radially collapsed position against an inner diameter of a sliding sleeve, in response to movement of the shifting sleeve;
• engaging the collapsed baffle via an isolation component on the shifting device;
• and
• moving the sliding sleeve along the wellbore to expose ports for providing access to a formation from inside the wellbore in response to a force from the isolation component on the baffle;
• wherein the mechanical engagement feature and the isolation component are attached to each other via the coiled tubing.