Fluid sand carrying experimental device

Abstract

The invention relates to oil well shaft test devices, in particular to a fluid sand carrying experimental device. The technical scheme is that the fluid sand carrying experimental device is mainly composed of a water tank, a centrifugal pump, a test tube, a sand feeding pipeline, a sand feeding hopper and a pipeline. The water tank is connected with the centrifugal pump and the test tube through the pipeline, the test tube is connected with the sand feeding pipeline, the sand feeding pipeline is connected with the sand feeding hopper, and the connection position of the test tube and the sand feeding pipeline is connected with the water tank through the pipeline. The fluid sand carrying experimental device has the advantages that a statistic relation of sand grain settling speed and well liquid average speed is built on the basis of a well shaft flow simulation experiment, and the optimum sand carrying effect can be achieved.

Description

technical field [0001] The invention relates to an oil well shaft test device, in particular to a fluid sand-carrying test device. Background technique [0002] In oilfield production, due to the long-term exploitation, the pressure of the oil layer is greatly reduced, and the pressure coefficient is reduced to be lower than the equivalent pressure coefficient of water. In this case, the well is washed with clean water to wash the sand, and the water enters the low-pressure layer to reduce the flow rate and velocity of the liquid going up and down the wellbore. Coarse sand particles cannot be effectively brought to the ground. In severe cases, all the injected water will enter the oil layer and cannot go back up, resulting in the failure of sand washing and the production of oil wells that are polluted in the oil layer and reduced. Due to the randomness of the sedimentation trajectory of irregularly shaped sand particles in the fluid, and the fact that the flow rate of the...

AI Technical Summary

Problems solved by technology

Coarse sand particles cannot be effectively brought to the ground

In severe cases, all the injected water will enter the oil layer and cannot go back up, resulting in failure of sand washing, resulting in reduced production of oil wells with contaminated oil layers

Due to the randomness of the settlement trajectory of irregularly shaped sand particles in the fluid, and the flow rate of the produced fluid in the wellbore in actual production is very complicated, it is difficult to accurately predict the actual settlement velocity of the sand particles in the well fluid, and certain experimental methods must be used

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