Non-associated gas
Non-associated gas reserves are developed primarily to produce natural gas. There may or may not be condensate production together with the gas. Under these conditions, it is essential that there be a profitable market to which to deliver the gas. (petrowiki.org)

Associated gas
Associated gas is gas produced as a byproduct of the production of crude oil. Associated gas reserves are typically developed for the production of crude oil, which pays for the field development costs. The reserves typically produce at peak levels for a few years and then decline. (petrowiki.org)

Source: Indonesian Ministry of Energy and Mineral Resources (ESDM)