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Flow control screen pipe for oil well

A technology of flow screen and base pipe, which is applied in the fields of production fluids, wellbore/well components, earth-moving drilling and mining, etc., can solve the problems of high cost, long working hours, manpower and material resources, etc.

Pending Publication Date: 2022-08-02
ANTON BAILIN OILFIELD TECH (BEIJING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, the electric pump and the above-mentioned production string must be proposed, which has high cost and long working hours. In addition, it is necessary to connect thousands of meters of pipe string to open the sliding sleeve, which consumes a lot of manpower and material resources, and delays the production of the oil well.

Method used

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  • Flow control screen pipe for oil well
  • Flow control screen pipe for oil well
  • Flow control screen pipe for oil well

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] There is a new well in an offshore oil field. The viscosity of the oil layer in this well is 142 cps, the viscosity of the formation water is 0.9 cps, the oil-water viscosity ratio is 158, the diameter of the horizontal section is 6 inches, and the length of the horizontal section is 1000 meters. A well structure according to the present invention was run, comprising 100 flow control screens according to the present invention, each flow control screen comprising three fluid valves with predetermined opening thresholds of 5 MPa, 12 MPa and 17 MPa, respectively. Thus, the entire oil well structure includes 100 fluid valves with a predetermined opening threshold of 5 MPa, 100 fluid valves with a predetermined opening threshold of 12 MPa, and 100 fluid valves with a predetermined opening threshold of 17 MPa.

[0101] After the well is opened, the daily fluid production is 176 cubic meters per day, the daily oil production is 172 cubic meters per day, the water content is 2.3...

Embodiment 2

[0109] An old well in an oil field has an 8.5-inch hole with a horizontal section of 400 meters. In the initial stage, a 5.5-inch screen was installed for simple sand control completion. After 90 days of anhydrous oil production period, low fluid volume, high water cut, and high production pressure drop occurred. The daily fluid production was 80 cubic meters per day, and the water cut quickly rose to 96%. The well was shut in and stopped production.

[0110] According to comprehensive analysis, the main reasons for the shutdown of the well are local water production and blockage of the original screen, and water control and sand control should be implemented to increase oil production.

[0111] Perforating the original screen, that is, forming multiple radial channels, makes the screen lose its ability to control flow. Then, 40 flow control screens according to the present invention are arranged in series in the original screen, so that the inner cavities of the base pipes o...

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Abstract

The invention relates to a flow control screen for an oil well. The flow control screen has adjustable flow conductivity. The flow control screen includes one or more fluid valves each having a respective predetermined opening threshold and configured to open to open a corresponding fluid channel when a fluid pressure difference between a fluid pressure of a first side of the fluid valve and a fluid pressure of a second side of the fluid valve is greater than or equal to the respective predetermined opening threshold. The invention also relates to an oil well structure with the flow control screen, a method for operating the oil well structure and a method for modifying the oil well structure.

Description

technical field [0001] The present invention relates to flow control screens for oil wells having adjustable flow conductivity. The present invention also relates to an oil well structure having the flow control screen and a method for operating the oil well structure. Background technique [0002] In oilfield development, due to the heterogeneity of the oilfield and the difference in oil-water viscosity, the degree of fracture development is different, and the permeability of each section of the formation is also very different. After the oil field has been in production for a period of time, water will be produced locally, and 100% of the water will be produced where the water is locally produced. For example, a well in an oilfield has a horizontal section of 800 meters long, 80 meters of which are high-permeability sections, and other sections are low-permeability sections. The underground viscosity of crude oil is 100 centipoise, the water viscosity is 1 centipoise, and...

Claims

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Application Information

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IPC IPC(8): E21B43/08E21B43/12
CPCE21B43/086E21B43/12
Inventor 裴柏林吴建昌刘穆华聂建飞
Owner ANTON BAILIN OILFIELD TECH (BEIJING) CO LTD
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