Open hole oil production technology and separated pipe string

Abstract

Disclosed are an open hole oil production technology and a separated pipe string. The open hole oil production technology comprises the steps of drilling the reservoir well section; descending the separated pipe string; replacing the well completion fluid; taking the gel breaking or increase production measure; descending a production pipe string; performing well clearing and production. The separated pipe string is connected with the lower end of the production pipe string for open hole oil production and comprises an outer pipe string, an inner pipe string and an external packer; the outer pipe string comprises a screen pipe, a segmented sealing cylinder and a float shoe which are sequentially connected from top to bottom; the upper end of the screen pipe is connected with the lower end of the production pipe string through a top packer; the inner pipe string is arranged in the inner chamber of the outer pipe string; the top of the inner pipe string is connected with the top packer; the bottom of the inner pipe string is provided with a plug; a pipe body of the inner pipe string comprises at least two replaceable center pipes which are connected with each other; the pipe wall of at least one of the two center pipes is provided with a hole; segmented seals are arranged between the pipe walls of the center pipes and the pipe wall of the screen pipe; the external packer sleeves the outer wall of the screen pipe; the outer lateral side of the external packer abuts against the side wall of an open hole.

Description

Technical field [0001] The invention relates to an oil production process and equipment in the field of oil exploitation, in particular to an open-hole oil production process capable of realizing staged oil production and a separating pipe string. Background technique [0002] In the prior art, for wells with open-hole completion, the oil and gas reservoir development plan is generally as follows: the production string is run in the upper part, and the entire open-hole section is generally combined with production without any separation pipe string. [0003] See figure 1 , figure 1 It is a schematic diagram of the structure of an open-eye oil production equipment in the prior art. The equipment includes a production pipe string 10 and an oil production component 20 connected to the lower end of the production pipe string 10. The oil production component 20 includes a top packer 201, and a screen 202 inserted into the open hole connected to the inner side of the screen. A well flus...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide an open-hole oil recovery process capable of realizing staged oil recovery and its separation string, so as to solve the problem that the open-hole oil recovery process in the prior art cannot be processed in layers

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