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低渗储层油井自然产能低,必须进行储层改造。但由于储层渗透率低,压力传导慢,波及范围仅限于裂缝附近,致使压裂井产能递减快。一般采用注水(气)补充能量开发,但由于油井受效所需的时间长、稳产水平低。通过研究认为油井受效后的稳产水平取决于受效前产能。因此,选择合理的时机进行重复压裂,可以有效提高油井产能,进而提高稳产水平。
Low permeability reservoirs have low natural productivity and must be rebuilt. However, due to the low reservoir permeability and slow pressure transmission, the scope of the confinement is limited to the vicinity of the fractures, resulting in a decrease in productivity of the fracturing wells. Generally, water injection (gas) is used to supplement energy development. However, due to the long time required for oil well to work, the stable production level is low. According to the research, the steady-state level after the well is affected depends on the pre-production capacity. Therefore, choosing a reasonable timing for repeated fracturing can effectively improve the productivity of oil wells and thus increase the stable production level.