Quantitative identification method of fracture morphology in inclined well fracturing in steep slope areas, and production increase method for inclined wells in steep slope areas

By calculating the actual burial depth of the fracturing well and the pump-off pressure gradient, the fracture morphology of the inclined well fracturing in the steep slope area can be accurately identified, solving the problem of low identification accuracy in the existing technology and achieving efficient development of oil wells and increased production.

CN115357836BActive Publication Date: 2025-09-19CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Application Number
CN202210993418.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-08-18
Publication Date
2025-09-19
Estimated Expiration
2042-08-18

AI Technical Summary

Technical Problem

Existing technologies have difficulty in accurately identifying the morphology of fractures in inclined well fracturing in steep slope areas, resulting in poor fracturing effects and an inability to optimize the fracturing process in a targeted manner, thus affecting the production results of oil and gas wells.

Method used

The actual burial depth of the fracturing well is calculated using the surface elevation contour map and well trajectory data. The pump-off pressure gradient is used to identify the fracture morphology. The actual burial depth and pump-off pressure gradient of the fracturing section are calculated using Equations 1 and 2 to identify vertical, horizontal, or complex fractures.

Benefits of technology

It has achieved accurate quantitative identification of fracture morphology in inclined well fracturing in steep slope areas, guided repeated fracturing, and improved the oil production and development efficiency of oil wells.

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Abstract

The present invention relates to a method for quantitatively distinguishing the morphology of fractures in inclined wells in steep slope areas and a method for increasing production of inclined wells in steep slope areas, and belongs to the technical field of oil and gas exploration and development. The method for quantitatively distinguishing the morphology of fractures in inclined wells in steep slope areas of the present invention calculates the actual buried depth of the fracture section through surface elevation data and well trajectory data, and finally achieves quantitative distinction of the morphology of fractures in inclined wells in steep slope areas by calculating the pump-off pressure gradient and utilizing the relationship between the pump-off pressure gradient and the morphology of artificial fractures. The method for quantitatively distinguishing the morphology of fractures in inclined wells in steep slope areas of the present invention is simple to operate and can relatively accurately quantitatively distinguish the morphology of fractures in inclined wells in steep slope areas.
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