An open-hole oil production process and its separation string

Abstract

An open-hole oil production process and a separation pipe string thereof, the process includes the steps of drilling a well section of a reservoir, lowering a separation pipe string, replacing completion fluid, gel breaking or stimulation measures, lowering a production pipe string, and clearing and putting into production. The separation string is connected to the lower end of the production string for open-hole oil recovery, and includes: an outer string, including screens, segmented sealing cylinders and floating shoes connected sequentially from top to bottom, and the upper end of the screen passes through a top seal The device is connected with the lower end of the production tubing string; the inner tubing string is set in the inner cavity of the outer tubing string, the top of the inner tubing is connected with the top packer, the bottom of the inner tubing is a plug, and the inner tubing The pipe body of the pipe includes at least two replaceable central pipes connected to each other, and at least one of the central pipes has an opening on the pipe wall, and a pipe wall is provided between the central pipe wall and the screen pipe wall. Segmental sealing; an external packer is sleeved on the outer wall of the screen, and the outer surface of the external packer is against the side wall of the open hole.

Description

technical field [0001] The invention relates to an oil production process and its equipment in the field of petroleum production, in particular to an open-hole oil production process capable of realizing staged oil production and its separation pipe string. Background technique [0002] In the prior art, for wells using the open hole completion method, the oil and gas reservoir development plan is generally as follows: the upper part is lowered into the production string, and the entire open hole section is combined for general production, and no separation string is installed in the open hole section. [0003] see figure 1 , figure 1 It is a structural schematic diagram of an open-hole oil production equipment in the prior art. The equipment includes a production string 10 and an oil recovery component 20 connected to the lower end of the production string 10. The oil recovery component 20 includes a top packer 201, and a screen 202 inserted into the open hole connected t...

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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