Automatic inflow water control device and water control method thereof

Abstract

The invention discloses an automatic inflow water control device and a water control method thereof. The automatic inflow water control device comprises a base pipe, a self-adaptive internal flow control mechanism, an inflow control mechanism, a yield increasing inflow control mechanism and a fluid injection one-way flowing device; the self-adaptive internal flow control mechanism is installed on the base pipe and comprises a self-adaptive internal flow controller and a self-adaptive outer sleeve, the self-adaptive internal flow controller is provided with a channel used for communicating the inside and the outside of the base pipe, and the opening degree of the channel is adjusted to automatically limit the flow according to different viscosities of fluid flowing through the self-adaptive internal flow controller; the inflow control mechanism is arranged on the base pipe in a sleeve manner and is connected to the self-adaptive outer sleeve; the yield increasing inflow control mechanism is installed on the base pipe and comprises a yield increasing sleeve and a yield increasing inflow controller, the yield increasing inflow controller is provided with a yield increasing channel used for communicating the interior and the exterior of the base pipe, and the yield increasing channel is controlled to be opened or closed according to the production pressure difference or the set designated opening pressure difference; and the fluid injection one-way flowing device is used for ensuring that the liquid injected from a wellhead can only flow into a stratum from the base pipe in a single direction. The invention further provides a water control method of the water control device.

Description

technical field [0001] The invention relates to a water control technology for horizontal wells, in particular to an automatic inflow water control device capable of increasing production and injecting liquid and a water control method thereof. Background technique [0002] In the current oil and natural gas extraction process, horizontal wells have been widely developed and applied due to their advantages of high liquid production, small production pressure difference, and small flow resistance. Horizontal wells are characterized by an unbalanced flow profile. With the extension of production time, this unbalanced flow profile will lead to premature water breakthrough, reduce well life, and affect well productivity. [0003] The existing horizontal well water control technology adopts two methods: one is the passive water control method of first finding water and then controlling the water. This method is carried out in the production state, the construction process is comp...

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