Analysis of Fracturing Effect of Recovered Wells in Class II Oil Reservoirs and Practices to Safeguard Fracturing Result

Second Oil Production Plant, Geology Brigade, Three Production Room, China

^* Corresponding author: linlexiao@petrochina.com.cn

Abstract

In recent years, as the polymer drive of the main class I oil reservoir has been transferred to the subsequent water drive development, the class II oil reservoir has gradually become the main target of the three times oil recovery development, compared with the class I oil reservoir, the class II oil reservoir has the characteristics of relatively poor oil reservoir development and strong non-homogeneity. With the effect of the second-class oil layer successively, the fracturing target is mainly the second-class oil layer, but the fracturing effect becomes worse year by year, and it is difficult to produce in the next step. Therefore, it is important to optimize well selection for fracturing. In this paper, we analyze the effect of fracturing wells in Class II reservoirs in recent years and summarize the factors affecting the effect of fracturing in Class II reservoirs and the practices to ensure the effect of fracturing in Class II reservoirs, so as to provide a reference basis for the selection of wells for Class II fracturing in the future, which is of certain significance.