EXPERIMENTAL METHOD AND APPARATUS FOR CO2 DISPLACEMENT PROCESS OF ULTRA-LOW PERMEABILITY OIL RESERVOIR

• Main Authors: ZHAO, Dongfeng, ZHAO, Yanhong, YIN, Dandan, ZHANG, Hongyu, XU, Yupeng, ZHU, Zhenyu
• Format: Patent
• Language: English
• Published: 16.06.2022
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

An experimental method and apparatus for CO2 displacement process of ultra-low permeability oil reservoir are provided. The apparatus comprises a displacement container and a core holder. The displacement container comprises a water container, an oil container and a gas container. The core holder is respectively connected with the water container, the oil container and the gas container through a connecting pipe; and the core holder connects with a gas-liquid separator through the connecting pipe. By designing the experimental apparatus, the problem of deviation of the experimental result caused by the reduction of the accuracy of the experimental apparatus is solved. Under the condition that the accuracy of the experiment is guaranteed, a relatively reasonable injection mode is obtained through the designed experimental method, and the recovery efficiency is improved.