Associated petroleum gas (APG), kapena gasi wogwirizana nawo, ndi mtundu wa gasi wachilengedwe womwe umapezeka ndi ma depositi a petroleum, mwina kusungunuka mumafuta kapena ngati "chipewa cha gasi" chaulere pamwamba pa mafuta omwe ali m'malo osungira. Mpweyawu ungagwiritsidwe ntchito m'njira zingapo pambuyo pokonzedwa: kugulitsidwa ndikuphatikizidwa m'malo ogawa magetsi achilengedwe, omwe amagwiritsidwa ntchito popanga magetsi pamalo omwe ali ndi injini kapena ma turbines, amayimiriridwanso kuti achire kachiwiri ndikugwiritsidwa ntchito pakubwezeretsanso mafuta, kusinthidwa kuchokera ku gasi. ku zakumwa zomwe zimapanga mafuta opangira, kapena zogwiritsidwa ntchito ngati chakudya chamakampani a petrochemical.