Volume 54

Research on the water control strategy of intelligent sliding sleeves in horizontal well Liang Xue, Wenkan Sheng, Jifei Yu, Hailong Zhang, Xinjiang Yan, Yichen Wang

Abstract

The intelligent water control sleeve can measure water cut and flow rate in real-time, remotely control the sleeve opening, and adjust the flow rate from different formation segments into the wellbore. To enhance the water control efficiency of the intelligent sliding sleeve, a multi-segment well reservoir model was established based on Well A01H in the M oilfield of the Bohai Sea. Reservoir numerical simulations were conducted for the water control process during the water-free period, low and medium water cut period, and high water cut period to study the adjustment strategies for the intelligent sliding sleeve valve opening. The results indicate that during the water-free period, targeting the liquid production profile, the duration of water-free oil production can be extended by reducing the sleeve valve opening in high production sections and increasing the opening in low production sections. During the low to medium water cut periods, with water cut as the control target, the rate of water cut increase can be reduced by decreasing the sleeve valve opening in high water cut sections and increasing the opening in low water cut sections. In the high water cut period, the focus shifts to maximizing daily oil production. Cumulative oil production can be increased by further extracting liquid production within the permissible range of production pressure difference. This study proposes control objectives and methods for each stage of intelligent sliding sleeve adjustment in horizontal wells, providing theoretical and practical guidance for water control development in CNOOC oilfields.

Keywords Intelligent sliding sleeve, Horizontal well, Water control and enhanced oil recovery, Multi-segment well model, Reservoir numerical simulation