Carbon dioxide oil displacement injection-production adjusting method

• Main Authors: GAO CHUNNING, ZHANG QINGZHOU, ZHANG JIE, WANG JINGHUA, WANG YONGHONG, YU GUANGMING, XIONG WEILIANG, GOU CONGBO, YUAN YINGJIE, ZHENG ZIGANG, ZHANG YONGQIANG
• Format: Patent
• Language: Chinese; English
• Published: 28.10.2022
• 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

The invention relates to the technical field of gas drive recovery ratio prediction in oil and gas field development, in particular to a carbon dioxide oil drive injection and production adjustment method. Different oil wells are classified according to whether injected gas is seen or not and whether the injected gas becomes effective or not by means of the oil well production dynamic change information before and after carbon dioxide flooding in the S1; according to the different oil well types classified in the S2, different types of oil well injection-production adjustment countermeasures are formulated; quantitative division of types is achieved by defining gas seeing and effect taking quantitative indexes, meanwhile, different injection and production adjustment strategies for improving the carbon dioxide flooding development effect are adjusted and formulated for different types of oil wells, and the pertinence and scientificity of injection and production adjustment are improved. 本发明涉及油气田开发中气驱采收率预测技术领域