Process pipe column

Abstract

The invention discloses a process pipe column. The process pipe column comprises a sand prevention pipe column and a filling service pipe column. A reverse packer is installed at the bottom of the sand prevention pipe column and corresponds to a packer at the upper portion of the sand prevention pipe column, pressure balance is achieved in the high-pressure extrusion process, the sand prevention pipe column is prevented from displacing under the effect of high-pressure sand-carrying fluid, cooperation of a bottom filling tool and a filling server is guaranteed, gravel in a horizontal well pipe is effectively extruded for filling sand prevention work, sand prevention well completion is smoothly achieved, and an oil-gas field is efficiently developed. According to the process pipe column, a reservoir can be fractured, wide and short cracks can be formed in a near well-bore zone, the seepage capacity of the reservoir is greatly improved, the yield increase effect is achieved, the sand blocking radius is expanded to the reservoir, the sand prevention effect is better, and the sand prevention efficiency period is longer.

Description

technical field [0001] The present application relates to the field of petroleum exploration, in particular to a process string. Background technique [0002] At present, domestic horizontal well sand control is mostly based on screen completion. The screen can only prevent the formation sand from entering the production string, but cannot prevent the migration of the formation sand. The fine sand produced in the formation will fill the gap between the screen and the wellbore. In the annular space, the seepage area is reduced, the seepage resistance is increased, and the production is reduced. Moreover, the fine sand and mud produced in the formation often block the screen pipe, or even cause the screen pipe to leak, reducing the sand control validity period. [0003] In the completion of horizontal well casing circulating gravel packing, the screen is run into the screen after the casing is perforated, and the screen and wellbore annulus are filled with gravel. Although it ...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a process string to solve the technical problem of low sand control efficiency

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