An experimental device and measurement method for downhole swirl sand removal in sandy geothermal wells

Abstract

The invention discloses an experimental device for swirl sand removal in a geothermal well containing sand and a method for measuring the effect of swirl sand removal. The experimental device includes a water supply and sand supply assembly, a mixing chamber and a swirl sand discharge assembly. The water and sand are transported to the mixing chamber through the water supply and sand supply component. After fully stirring and mixing, the mixing chamber is heated, and then the water-sand mixture is separated from the solid and liquid by the cyclone component, and the gravel is sprayed into the annulus of the wellbore, and finally Collecting tanks and measurements are made to obtain the sand content of the produced fluid. The invention can measure the separation performance of the cyclone separator under different working conditions by changing the size of the gravel, the type of the gravel, the fluid flow rate and the rotational speed of the cyclone separator, which is useful for reducing the scour of surface instruments, Corrosion is of great significance. It can provide effective solutions to the problem of high sand production in the process of heat storage and recovery in geothermal wells, and provide substantial guidance.

Description

technical field [0001] The invention belongs to the field of sand control of geothermal wells, in particular to an experimental device and a measurement method for swirl flow sand removal in a geothermal well containing sand. Background technique [0002] Now a new type of environmentally friendly energy - geothermal, has aroused widespread concern, and the exploitation of geothermal wells is intensifying. It is a relatively normal method to use geothermal energy for power generation and heat generation by mining geothermal wells. However, when geothermal wells are exploited to extract heat storage, sometimes sand will be carried over, and the geothermal water containing sand will have a greater impact on the pump after it is pumped to the ground by a centrifugal pump, greatly reducing the service life of the pump. There are many such devices for pumping water to the ground and then discharging sand, but this will still have a great impact on the wellbore wall. Contents o...

AI Technical Summary

Problems solved by technology

However, when exploiting geothermal wells to extract heat storage, sometimes there will be sand carrying, and the sand-containing geothermal water will have a greater impact on the pump after being pumped to the ground by a centrifugal pump, greatly reducing the service life of the pump

There are many such devices to pump water to the ground and discharge sand, but this will still have a great impact on the wellbore wall

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