Super-hydrophobic pre-filled gravel sand control pipe and preparation method thereof

Abstract

The invention provides a super-hydrophobic pre-filled gravel sand control pipe and a preparation method thereof. The super-hydrophobic pre-filled gravel sand control pipe comprises a base pipe, a super-hydrophobic sand control pipe shell and a super-hydrophobic gravel layer; the base pipe is sleeved with the super-hydrophobic sand control pipe shell, and the super-hydrophobic gravel layer is filled between the base pipe and the super-hydrophobic sand control pipe shell; and the surface of the super-hydrophobic sand control pipe shell is provided with a first super-hydrophobic coating, the super-hydrophobic gravel layer is collected by super-hydrophobic gravel, and the surfaces of the super-hydrophobic gravel are provided with second super-hydrophobic coatings. The super-hydrophobic pre-filled gravel sand control pipe can not only realize the self-cleaning function of the sand blocking medium, but also can achieve the purpose of controlling water and increasing oil in high water cut well and prolong the stable production period of oil wells.

Description

technical field [0001] The invention relates to a pre-packed gravel sand control pipe, in particular to a superhydrophobic pre-packed gravel sand control pipe and a preparation method thereof. Background technique [0002] Sand control refers to the correct selection of cementing and completion methods in the process of oil production according to the oil layer and oil well conditions, formulating reasonable production measures, controlling production pressure difference, limiting seepage velocity and preventing sand plugging. At present, mechanical sand control can be divided into two categories. The first category mainly uses mechanical strings for sand control, such as wire-wrapped screens, slotted liners, and various sand filter tubes. Although this method is simple and feasible, it is The sand control effect is poor, and the sand control pipe string is easily blocked by formation sand, which cannot effectively prevent the formation sand from entering the wellbore. The ...

AI Technical Summary

Problems solved by technology

During the production process of sand control wells, the formation fluid carries formation fine sand, mechanical impurities, clay mud and other solid plugs, which are easy to block the pre-filled sand control pipe and gravel layer, resulting in a decrease in the permeability of the sand retaining medium and a serious decline in production capacity

At present, the anti-clogging function of pre-filled sand control pipes is mainly achieved by changing the design of the sand control pipe structure and parameter optimization at the oil mining site. The permeability of sand medium decreases, and the permeability of gravel accumulation decreases significantly with the increase of applied pressure.

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