Study on Hydrate Control Measures in Deepwater Gas Wellbore under Intervention Operations

Abstract

Hydrate control research is of great significance to the efficient development of deepwater gas wells. A deepwater gas well intervention wellbore hydrate suppression experimental device was built to simulate the field intervention operation and monitor the hydrate generation in the kettle in real time. The physical simulation experiments were conducted for the injection concentration, injection volume, and injection rate of the glycol inhibitor for different working conditions of the intervention operation. The results show that the hydrate inhibition effect is good when the injection concentration of glycol solution is 40%, the hydrate plugging in the wellbore is slow when the injection volume is 20 mL, and the hydrate inhibition is effective when the injection rate is 4 mL/min. The injection of glycol inhibitor can effectively delay the time required for wellbore hydrate plugging and ensure the intervention operation. The above research results provide ideas for in-wellbore hydrate control in deepwater gas well intervention operations in the field.