Shaft sand-carrying capacity simulation experiment device with coiled tubing and method

Abstract

The invention discloses a shaft sand-carrying capacity simulation experiment device with a coiled tubing. The shaft sand-carrying capacity simulation experiment device comprises an outer tube for simulating a shaft, an inner tube for simulating the coiled tubing, a gas-liquid-solid injection system and a shaft monitoring system, the inner tube is movably mounted on the outer tube and extends into a cavity of the outer tube, and an electric rotating head is mounted at the tail end of the inner tube extending into the outer tube; a first outlet of the gas-liquid-solid injection system communicates and is connected with the top end of the inner tube exposed out of the outer tube so as to inject a water flow into the inner tube, and a second outlet of the gas-liquid-solid injection system communicates and is connected with an injection port formed in the tail end of the outer tube so as to inject a gas-liquid-solid mixture into an inner cavity of the outer tube; and the shaft monitoring system is used for observing the sand production amount in the cavity of the outer tube under various simulated operation conditions of an inner cylinder in the cavity of the outer tube. A simulation structure of the coiled tubing is added into the shaft for the first time, and real-time accurate monitoring of sand-carrying flowing states of different shaft positions is achieved through lifting and lowering activity operation, rotating operation and sand washing operation of the coiled tubing.

Description

technical field [0001] The invention relates to the technical field of simulation devices for sand-carrying capacity of well bores, in particular to a simulated experimental device and method for sand-carrying capacity of well bores with coiled tubing. Background technique [0002] In the gas hydrate test production project, a small amount of mud and a large amount of small-sized formation sand are often brought into the wellbore of the production well. In order to prevent formation sand from clogging or affecting the normal test production operation of the wellbore, it is necessary to carry Formation sand is carried from the wellbore to the operation platform to prevent sand stuck, sand plugged or sand buried in the wellbore of the production well, without affecting the normal production and operation of the artificial lift structure. However, in the actual production test project, the operators cannot directly observe the formation sand in the wellbore, so they cannot judg...

AI Technical Summary

Problems solved by technology

In these existing technologies, there is almost no wellbore sand-carrying capacity in the case of coiled tubing-assisted wellbore sand-carrying operations. Therefore, it is necessary to simulate the sand-carrying capacity of the wellbore under the action of coiled tubing in order to make the simulation results better. Guide actual production operations

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