Device and method for monitoring hydrate deposition law during deep-water gas well testing

Abstract

The invention relates to a monitoring device for hydrate deposition law during deep-water gas well testing. The monitoring device for hydrate deposition law during deep-water gas well testing includes: a gas-liquid delivery system, a hydrate monitoring system, and an auxiliary system; the gas-liquid delivery system provides a gas source , liquid source, mixed and transported to the hydrate monitoring system; the hydrate monitoring system forms hydrate in the simulated wellbore under high pressure and low temperature conditions, records and observes the process of hydrate crystallization, deposition and clogging; the auxiliary system performs gas post-treatment, and realizes the device security control. The invention can simulate the hydrate formation process as a dynamic process, which is consistent with the actual test process. It can observe the hydrate deposition and clogging process in real time, and the ultrasonic imaging can monitor the deposition distribution of the gas-water-hydrate three-phase in different positions in real time. Obtaining the distribution law of hydrate layer thickness along the wellbore axis through imaging observation is of great significance for solving the flow guarantee problem in deepwater testing.

Description

technical field [0001] The invention belongs to the field of flow assurance in the testing process of deep-water gas wells, and in particular relates to a monitoring device and method for hydrate deposition rules during testing of deep-water gas wells, which are used for simulating initial well opening, variable flow rate exploitation, well shut-in and other testing stages. The law of hydrate deposition and blockage provides a basis for flow guarantee. Background technique [0002] With the depletion of onshore oil resources and the continuous exploitation of offshore oil, the exploitation of deep water oil and gas resources has increasingly become a hot field of oil development. In the deep water field, the environment of low temperature and high pressure can easily promote the formation of hydrates. The hydrates solidify on the pipe wall to cause throttling effect, accelerate the deposition process, and form a vicious circle, which will lead to wellbore blockage and cause ...

AI Technical Summary

Problems solved by technology

[0005] Among the few devices related to hydrate deposition in vertical pipelines, most of them observe and study the deposition process through visual windows, and cannot effectively measure the deposition thickness of the hydrate layer and the deposition law of hydrate under different working conditions, that is, the hydrate formation section or form a hydrate layer but the intermediate fluid can flow, or the thickness of the hydrate layer in different segments is different

[0006] To sum up, in the process of deep-water gas well testing, the research on the location, thickness and regularity of hydrate deposition is still insufficient. Based on the study of the influence of temperature and pressure, water content, pipe wall polarity and other factors on hydrate deposition

Images