NOVELTY - A feed gas is contacted in an absorber with an ultra-lean physical solvent to form a rich solvent and a treated feed gas. The rich solvent is depressurized to remove 1-3C hydrocarbons from the rich solvent, to form a depressurized solvent. The 1-3C hydrocarbons are recycled to the absorber. The depressurized solvent is flashed and stripped to produce an ultra-lean solvent and a flashed gas. Stripping is carried out with a portion of the treated feed gas. The flashed gas is separated to produce a carbon dioxide stream.    USE - Acid gas removal from feed gas, particularly acid gas from high-pressure gases with high carbon dioxide and hydrogen sulfide content at concurrent production of pipeline gas and concentrated carbon dioxide stream for enhanced oil recovery.    ADVANTAGE - The method carries out depressurization of rich solvent, which provides most of the refrigeration duty. Overall energy consumption and capital cost are reduced. The process does not require any external peak source. External refrigeration and cooling water consumption (by using flashed rich solvent in cooling the lean solvent to the absorber, and then in cooling the feed gas compressor discharge to reduce cooling water consumption) are reduced. The absorber overhead gas is used in chilling the feed gas to the absorber to further minimize the feed gas chiller refrigeration requirement. The method allows for simplification of plant design as significantly less supporting offsite and/or utility systems (e.g. steam boilers or fuel gas heaters) are kneaded.    DETAILED DESCRIPTION - A feed gas is contacted in an absorber with an ultra-lean physical solvent to form a rich solvent and a treated feed gas. The rich solvent is depressurized to remove 1-3C hydrocarbons from the rich solvent, to form a depressurized solvent. The 1-3C hydrocarbons are recycled to the absorber. The depressurized solvent is flashed and stripped to produce an ultra-lean solvent and a flashed gas which predominantly comprises carbon dioxide and 4C or more components. Stripping is carried out with a portion of the treated feed gas to form stripped vapors. The stripped vapors are recycled to the absorber to recover 1-3C hydrocarbons from the portion of the treated feed gas, and the flashed gas is separated in a separator to produce a carbon dioxide stream having less than 5% 4C or more components and a 4C or more product. INDEPENDENT CLAIMS are included for the following:    (1) regeneration of physical solvent; and    (2) gas treatment plant.    DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram of the acid gas removal method using physical solvent.