Directional chemical regulation and control method for steam flooding of thermal production well

• Main Authors: YANG RENFENG, XIE HAOJUN, ZHANG LIJUN, BAI YUTING, TAN XIANHONG, WANG TAICHAO, JIAO YUJIA, FAN TINGEN, ZHENG WEI, SUN YAN, WU JUNCHUAN, ZHAN SHENGYUN
• Format: Patent
• Language: Chinese; English
• Published: 28.11.2023
• 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 relates to a thermal production well steam flooding oriented chemical regulation and control method which comprises the following steps: injecting steam into an injection well, determining that steam channeling has occurred in steam flooding, and identifying a well group in which the steam channeling has occurred; stopping injecting steam into the injection well, and injecting a chemical plugging agent with a tracer agent into the injection well; after the chemical plugging agent is injected to a preset amount, steam is injected into the injection well; the frequency of a well without steam channeling is reduced, the production pressure difference is reduced, the frequency of a well with steam channeling is increased, and the production pressure difference is increased; and after the tracer agent is extracted from the well mouth of the well with the increased frequency, the frequency of the well with steam channeling is immediately reduced, the production pressure difference is reduced for produ