Novel horizontal well sand preventing well completion structure

Abstract

The invention relates to a novel sand control completion structure of a horizontal well, which comprises a well wall and a sand control tube, wherein the well wall comprises an ascending section and a horizontal section. A sleeve is arranged on the ascending section of the wall; one end of the horizontal section close the ascending section is the butt end, while the end far away from the ascending section is the tip end; the angle between the horizontal section of the wall and the horizontal plane varies from 0 to 20 degrees; the sand control tube is positioned inside the horizontal section of the well wall and fixedly connected with the well wall; and the cavity between the sand control tube and the well wall is filled with glassy hollow granules. The novel sand control completion structure of the horizontal well has the advantages of easy realization of the well completion process and good well completion quality.

Description

technical field [0001] The invention belongs to the field of oil or natural gas exploitation, in particular to a new sand control completion structure for horizontal wells. Background technique [0002] Horizontal wells are widely used in oil and gas field production due to higher production and other advantages than vertical wells. In the exploitation of oil and natural gas, some exploited formations are unconsolidated sandstone oil and gas reservoirs, and sand production occurs during production. Measures need to be taken to prevent the formation sand from flowing into the well with the fluid, so as to ensure the normal production of oil or natural gas. At present, the sand control completion structure of the horizontal well with better sand control effect includes: well wall and sand control pipe. The well wall is composed of an ascending section and a horizontal section. The horizontal section of the well wall can be inclined upward or downward. The sand control pipe is...

AI Technical Summary

Problems solved by technology

[0004] This horizontal well sand control completion structure has the following problems: the completion process of the horizontal well sand control completion structure is difficult, and the completion quality is not guaranteed

In this way, where the annulus between the well wall and the sand control pipe cannot be filled with gravel, the sand control pipe is easy to block, poor completion quality leads to a decline in oil or natural gas production, and sand content is prone to appear in the produced oil or natural gas Big, or severe sand production, even make the horizontal well can not work normally

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