A communication connection method for establishing an upper completion string and a lower completion string

Abstract

The invention discloses a communication connection method for establishing an upper well completion pipe string and a lower well completion pipe string. The tubing is straightened and guided into the sand control screen, and the positioning key on the sand control screen is in contact with the single-action directional plug-in communication component installed on the upper completion string. And turn the single-action directional plug-in communication component, continue to lower the pipe string, so that the wet joint protection directional front end on the connection component is inserted into the groove on the connection component; perform depressurization test mining operation, and measure the pressure in the inner cavity through the measurement unit And measure the change of radial compressive stress of reservoir hydrate to sand control screen. The invention realizes the establishment of a communication connection method between the upper well completion and the lower well completion, and can monitor the compaction and settlement in the process of depressurization and trial production of hydrates in real time through the sand control screen.

Description

technical field [0001] The invention relates to the technical field of gas hydrate test production measuring devices, in particular to a method for establishing a communication connection between an upper well completion pipe string and a lower well completion pipe string. Background technique [0002] The depressurization test production method is considered to be the mainstream technology for hydrate test production, but during the depressurization test production process, reservoir compaction and settlement may occur in the production well. For example, in a certain year in the Nankai Trough in Japan, the seabed deformation was measured and it was confirmed that the top of the production well had subsidence on the order of centimeters after several days of decompression and test production. Sand phenomenon. [0003] Compared with the gas production application of conventional oil and gas wells, the service life of the sand control screen used in the hydrate test producti...

AI Technical Summary

Problems solved by technology

[0003] Compared with the gas production application of conventional oil and gas wells, the service life of the sand control screen used in the hydrate test production in the ocean is far from the original normal life cycle

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