High-dip-angle bottom water reservoir GAGD-CCUS integration method

• Main Authors: SUN YU, WANG NING, HU SHILAI, TANG YONG, ZHANG HAOCHUAN, LONG KEJI
• Format: Patent
• Language: Chinese; English
• Published: 28.07.2023
• 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

The invention discloses a high-dip-angle bottom water reservoir GAGD-CCUS integration method which comprises the following steps: S1, arranging a vertical well at the top of a reservoir as a gas injection well; arranging a horizontal well in the middle of the oil reservoir as a producing well; s2, the horizontal well carries out depletion type exploitation through natural water body energy of the oil reservoir; when the yield of the horizontal well is continuously reduced and the water content reaches a preset condition, carbon dioxide gas starts to be continuously and slowly injected into the vertical well, and gas-assisted gravity flooding is conducted; s3, in the gas-assisted gravity flooding process, when the yield of the horizontal well is continuously reduced and the water content reaches a preset condition, the horizontal well is converted into an injection well, liquid carbon dioxide is injected, the vertical well is converted into a monitoring well, and carbon dioxide burying is carried out; s4, afte