Analysis and Experimental Research on Water Control Performance of Integrated Water Control Fracturing Completion Tools

Abstract

This paper proposes a swirl type water control device to address technical challenges such as gas well formation water output and multi-stage segmented fracturing of long horizontal wells. The geometric and grid models of the fluid region of the water control device are extracted and established. The distribution law of the flow pressure drop of methane gas and pure water passing through the device is analyzed through numerical simulation. The simulation results show that under the same flow rate, the pressure drop of pure water is about 140 times that of methane gas, indicating that the swirl type water control device has a much greater limiting effect on water flow than methane gas; At the same inlet pressure, the production of methane gas is about forty times that of water, indicating that the swirl water control device has a good effect on controlling water gas. At the same time, a set of integrated water control fracturing completion tools was designed, which can directly perform fracturing operations after lowering the pipe column. After fracturing is completed, natural gas production operations can be carried out directly without the need for other auxiliary tools to be lowered. This integrated water control fracturing tool has been applied to 6 gas wells in Changning, significantly improving on-site operational efficiency. The results of this study provide a new and efficient tool for solving the problems of segmented fracturing and water production in gas wells.