An automatic water control valve for horizontal wells

Abstract

The invention relates to a horizontal well automatic water control valve. The horizontal well automatic water control valve mainly comprises a valve base 1 and a valve cover 6; the valve base 1 comprises a unit I, a unit II, a unit III and a unit IV which are the same, and the four units are provided with flow guide grooves with the same structure correspondingly; and the flow guide grooves conduct water control by utilizing the following principles that (1) a density difference exists between oil and water, and an oil-water mixed phase can be separated when rotating; and (2) streamwise friction can be generated when fluid flows in the flow guide grooves. The unit I in the valve base 1 is taken as an example to conduct specific explaining: when flowing into a first-stage flow guide groove 3 through an inlet 2, the oil-water mixed phase can be separated into oil and water single phases through rotating, wherein the oil phase flows out directly along an outlet 5, the water phase can continue to flow for a certain distance along a second-stage flow guide groove 4 and then flows out along the outlet 5, thus the streamwise friction of the water phase is increased, and therefore the purpose of controlling water is achieved. The horizontal well automatic water control valve has the beneficial effects that the horizontal well automatic water control valve has no movable component, and is suitable for a sand producer; and, meanwhile, filtrational resistance of a producing area with the high water content can be increased, and the purposes of balancing a fluid producing profile and enhancing the recovery efficiency are achieved.

Description

technical field [0001] The invention relates to an automatic water control valve for a horizontal well, belonging to the technical field of oil and gas field development. Background technique [0002] At present, thin layer oil reservoirs, bottom water oil reservoirs, fractured oil reservoirs and shallow water and deep water oil and gas reservoirs are mainly exploited through horizontal wells and extended reach wells. Due to the influence of flow, the liquid production profile is unbalanced, which leads to premature water breakthrough in oil and gas reservoirs, and ultimately shortens the life of oil and gas wells and reduces the production of oil and gas reservoirs. [0003] ICD (Inflow Control Device) is a new well completion tool used to balance the inflow dynamics of horizontal wellbore. The sand surface pressure drop of each section of the section changes, and then a relatively balanced injection-production profile is obtained. At present, there are three main types o...

AI Technical Summary

Problems solved by technology

These three ICDs are all passive controllers, and the additional differential pressure loss needs to be designed before going into the well, and cannot be changed after going into the well, and the fluid production along the wellbore in the actual reservoir is constantly changing, which limits the use of the tool and make the job more complex

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