Flow regulation and water control device, pup joint, pipe string and secondary water control completion method

A water control device and flow regulation technology, applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., can solve the problems of chemical damage to the reservoir and high cost, and achieve the improvement of single well production and recovery rate, The effect of inhibiting the water coning at the edge and bottom and delaying the water-seeing time

Active Publication Date: 2020-11-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods have a certain effect on delaying the edge and bottom water coning of horizontal wells, prolonging the production cycle of oil wells, and improving the outflow profile, but there are disadvantages such as high cost, multiple operations, and chemical agents that damage the reservoir to a certain extent.

Method used

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  • Flow regulation and water control device, pup joint, pipe string and secondary water control completion method
  • Flow regulation and water control device, pup joint, pipe string and secondary water control completion method
  • Flow regulation and water control device, pup joint, pipe string and secondary water control completion method

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Embodiment Construction

[0056] The present invention will be further described below in conjunction with accompanying drawing.

[0057] figure 1 A column 10 according to the invention is shown. Such as figure 1 As shown, the tubing string 10 includes a coiled tubing 1 , a packer 2 , a packing converter 3 and a short joint 100 arranged in sequence from upstream to downstream. Wherein, the packer 2 is arranged at the lower end of the coiled tubing 1, and is used to isolate the annular space between the tubing string 10 and the original well wall, so as to ensure that the horizontal section will not go up after filling with gravel. The packing converter 3 is located downstream of the packer 2, and is used to switch the passage of the fluid, and is used to ensure that the gravel and sand-carrying fluid injected into the inner cavity of the pipe string 10 from the wellhead enter the horizontal well section sub-joint 100 after passing through the packing converter 3 The ring between the original wellbor...

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Abstract

The invention provides a flow-regulating water control device, a pipe nipple, a pipe string and a secondary water-control completion method. The flow-regulating water control device comprises a base pipe, a rotational flow controller and a protecting barrel, wherein a mounting groove is formed in the outer wall of the downstream end of the base pipe, the rotational flow controller is arranged at the mounting groove; and the protecting barrel is arranged outside the base pipe in a sleeving mode, and an annulus cavity with the downstream end blocked is formed by the protecting barrel and the base pipe. After fluid enters the annulus cavity, the fluid enters an inner cavity of the base pipe through the rotational flow controller. By using the flow-regulating water control device, the liquid production section of a horizontal well can be balanced, the waterline coning speed is decreased, and the purposes of stabilizing oil and controlling water are achieved.

Description

technical field [0001] The invention relates to the technical field of oil and gas well completion, in particular to a flow regulation and water control device, a pup joint, a pipe string and a secondary water control and completion method. Background technique [0002] Compared with conventional vertical wells, horizontal wells increase the contact area between the wellbore and the reservoir, and the single well production is high. With the continuous improvement of horizontal well technology, more and more horizontal wells are used in the production and development of oil reservoirs. [0003] With the development of production and development, due to the long horizontal wellbore, the heterogeneity of reservoir rock and the anisotropy of permeability, and the different oil-water interfacial tensions lead to different outflow pressure differences between oil and water, it is very easy to be affected by edge and bottom water. The coning leads to a large amount of water produ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/12E21B43/04E21B43/08
CPCE21B43/04E21B43/08E21B43/12
Inventor 赵旭侯倩翟羽佳姚志良李晓益段友智
Owner CHINA PETROLEUM & CHEM CORP
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