Aged oil treatment method

• Main Authors: YANG WENMING, YANG GUOHE, DUAN YUNJIANG, XU WENTAO, GAO CHUNHAI, YANG XIAOHUA, YANG CHUNLIN, WANG JINYU, YANG XIAODONG, WANG YINGQUAN, SHE JIAOFENG, WANG XIA, BA TE, CHENG FUTIAN
• Format: Patent
• Language: Chinese; English
• Published: 15.10.2014
• Subjects: CHEMISTRY; CRACKING HYDROCARBON OILS; FUELS; LUBRICANTS; METALLURGY; MINERAL WAXES; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; TECHNICAL GASES CONTAINING CARBON MONOXIDE

The invention discloses an aged oil treatment method and belongs to the technical field of petroleum development. The aged oil treatment method comprises the following steps of pouring aged oil added with a demulsifier into carbonate fracture-cave of a reinjection well so that national degradation of the aged oil with impurities such as fatlute and slag is realized by the well stratum high-temperature characteristics, and according to a water-injection oil-replacement batch-type exploitation mode of the reinjection well, carrying out re-exploitation on the decomposed aged oil in the fracture-cave, wherein a weight ratio of WD-5: WD-4: WD-1 in the demulsifier (2# demulsifier) is 8: 2: 2, WD-5 is polyoxyethylene epoxypropenyl ether, WD-4 is phenol-amine resin-type epoxyvinyl epoxypropenyl ether and WD-1 is alkylphenolic resin-type epoxyvinyl epoxypropenyl ether.