The assets being sold in West Texas and New Mexico are all non-operated and are comprised of CO2 and waterflood assets, the company said on Monday.
Marathon did not identify any buyer or buyers.
Together the assets produced a cumulative average of 4000 barrels of oil equivalent per day in the first half of this year.
The announced sale means that since August last year the company has announced or closed the sale of non-core assets totalling more than $1.5