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Method and system for determining crack closure length based on fracturing well production data

A technology for production data and fracturing wells, which is applied in earth-moving drilling, wellbore/well components, and production fluids, etc., and can solve problems such as large room for improvement and no corresponding instructions.

Active Publication Date: 2019-10-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can describe the asymmetry of the fracture relatively accurately, but the reasons for the asymmetry have not been deeply explored, and there is no corresponding explanation for the asymmetry caused by the partial closure of the fracture, so there is a lot of room for improvement

Method used

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  • Method and system for determining crack closure length based on fracturing well production data
  • Method and system for determining crack closure length based on fracturing well production data
  • Method and system for determining crack closure length based on fracturing well production data

Examples

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Embodiment 1

[0068] Such as figure 1 As shown, it is a flow chart of the method for determining the fracture closure length based on the production data of the fracturing well in this embodiment; the method includes the following steps:

[0069] Step S1: Process the original production data to obtain production-fracture closure data volume.

[0070] Step S2: Process the production-fracture closure data volume to obtain actual production change data;

[0071] Step S3: Process the actual output change data to obtain the actual output plate data;

[0072] Step S4: Coupling the actual production chart data and the production-fracture closure chart data in the same log-logarithmic chart to obtain production-fracture closure eigenvalue data;

[0073] Step S5: Determine the fracture closure position based on the actual production chart data, the production-fracture closure chart data and the production-fracture closure characteristic value data, thereby determining the fracture closure length. ...

Embodiment 2

[0136] Such as Figure 4 Shown is a schematic structural diagram of a system for determining the closure length of a fracture based on the production data of a fractured well in this embodiment. The system, including:

[0137] Raw data processing unit 1, the data processing unit 1 processes the raw production data to obtain production-fracture closure data volume;

[0138] A first intermediate processing unit 2, the first intermediate processing unit 2 processes the production-fracture closure data volume obtained by the raw data processing unit 1 to obtain actual production change data;

[0139]The second intermediate processing unit 3, the second intermediate processing unit 3 processes the actual output change data obtained by the first intermediate processing unit 2 to obtain actual output plate data;

[0140] The third intermediate processing unit 4, the third intermediate processing unit 4 couples the actual output plate data and the output-crack closure plate data obt...

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Abstract

The invention discloses a method for determining a crack closure length based on fracturing well production data. The method for determining the crack closure length based on the fracturing well production data comprises the following steps: processing raw production data to obtain a yield-crack closure data body; processing the yield-crack closure data body to obtain actual yield change data; processing the actual yield change data to obtain actual yield plate data; coupling the actual yield plate data and the yield-crack closure plate data in the same double logarithmic plate to obtain yield-crack closure characteristic value data; and determining the crack closure position based on actual yield plate data, the yield-crack closure plate data, and the yield-crack closure characteristic value data, so as to determine the crack closure length. The invention also discloses a system corresponding to the method for determining the crack closure length based on the fracturing well production data. The method and system for determining the crack closure length based on the fracturing well production data can quickly and accurately obtain the length and position of part closure of the fracturing well crack, thereby improving the accuracy of the production dynamic analysis of the fracturing well.

Description

technical field [0001] The invention relates to the field of oil and gas exploration and development, in particular to a method and system for determining the closure length of fractures based on production data of fracturing wells. Background technique [0002] Fracturing wells have important strategic significance and economic benefits in terms of increasing recoverable reserves, increasing single well production, reducing production costs, and developing complex oil and gas reservoirs. It has become a hot issue in the field of oil and gas reservoir exploitation today. Monitoring the production decline process of oil wells is a technique for understanding formation characteristics in the development of modern oil and gas reservoirs. [0003] In actual production, the oil or gas production of fractured wells along the fractures is uneven, or only some fracture sections produce oil or gas, while the oil or gas production of other fracture sections is almost zero. The reaso...

Claims

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Application Information

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IPC IPC(8): E21B49/00E21B43/26
CPCE21B49/00E21B43/26
Inventor 史云清严谨郑荣臣贾英王树平程时清李鼎一黄瑶
Owner CHINA PETROLEUM & CHEM CORP