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Water-controlling and oil-increasing device and method for oil well

A technology for oil wells and oil encounters, which is applied in the field of water control and oil increase devices for oil wells, and can solve the problems of complex structure of inflow control devices, inability to accurately adjust flow resistance, inability to effectively control water and stabilize oil, etc., and achieve the effect of improving development effects.

Active Publication Date: 2020-09-15
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing inflow control devices are complex in structure and unable to precisely adjust their flow resistance under high water content conditions
Facing the current situation that most domestic oilfields have entered the medium-high water-cut development stage, existing devices cannot effectively control water and stabilize oil production

Method used

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  • Water-controlling and oil-increasing device and method for oil well
  • Water-controlling and oil-increasing device and method for oil well
  • Water-controlling and oil-increasing device and method for oil well

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Embodiment Construction

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034] see Figure 1 to Figure 4 , the present invention provides a technical solution:

[0035] An oil well water control and oil increase device, comprising a central pipe 5 and an outer pipe 4, the outer pipe is sleeved outside the central pipe, and an annular space is formed between the outer pipe and the central pipe, which is an annular passage 6, and the central pipe At least one installation window is set up, and a water control and oil increase mechani...

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Abstract

The invention discloses a water-controlling and oil-increasing device and method for an oil well. The device comprises a central tube and an outer tube, wherein the outside of the central tube is sleeved with the outer tube; an annular space is formed between the outer tube and the central tube to form an annular space channel; the central tube is provided with at least one mounting window; a water-controlling and oil-increasing mechanism is arranged on the mounting window; and fluid flows into the outer tube, then flows into the water-controlling and oil-increasing mechanism from the annularspace channel, and finally flows into the central tube from the water-controlling and oil-increasing mechanism. According to the water-controlling and oil-increasing device and method, the flow resistance of the device can be adjusted automatically according to the fluid property, i.e., when the water content is relatively low, the device has certain resistance to the fluid, so that the influencesof the end effect and the reservoir heterogeneity can be counteracted, and balanced advancement of a production section is achieved; and along with the increase of the water content, the flow resistance of the water-controlling device is improved remarkably, the flow of a water exit interval is restrained remarkably; and the long-term stable production of an oil-gas well is ensured.

Description

technical field [0001] The invention relates to the technical field of oil exploitation, in particular to an oil well water control and oil increase device and method. Background technique [0002] In the process of oilfield development, due to the influence of reservoir heterogeneity and other factors, the production of oil wells at different positions is different, and the unbalanced advancement of the production profile will lead to premature water / gas breakthrough at high production positions. Once water / gas breakthrough occurs, well production will be significantly reduced. Completion methods such as staged perforation and variable density perforation can balance the production profile to a certain extent. However, these methods have limited ability to control the production profile and cannot effectively control water / gas. [0003] A variety of passive inflow control devices and adaptive inflow control devices have been developed successively at home and abroad. How...

Claims

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Application Information

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IPC IPC(8): E21B43/12
CPCE21B43/12
Inventor 赵麟王增林张全胜古光明智勤功王术红孟永闫文文戴超丁杰
Owner CHINA PETROLEUM & CHEM CORP
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