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A method and a device for calculating fracture conductivity value of a horizontal well to be fractured

A conductivity and horizontal well technology, applied in the field of horizontal well fracturing, can solve problems such as large error in fracture conductivity value and inappropriate fracturing point design.

Active Publication Date: 2019-03-01
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Claims
  • Application Information

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Problems solved by technology

The existing calculation method of fracture conductivity value is usually to multiply the reservoir permeability at the fracturing point by the fracture width. At present, the fracture conductivity value is generally obtained through professional fracturing design software, and the obtained results are subject to fracturing. The fluid and construction parameters are greatly affected, so the fracture conductivity value obtained by this method has a large error, and it is not suitable for the design of fracturing points in horizontal wells.

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  • A method and a device for calculating fracture conductivity value of a horizontal well to be fractured
  • A method and a device for calculating fracture conductivity value of a horizontal well to be fractured
  • A method and a device for calculating fracture conductivity value of a horizontal well to be fractured

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Embodiment 1

[0108] Embodiment 1 of the present invention provides a method for calculating the fracture conductivity value of a horizontal well to be fractured, the process of which is as follows figure 1 shown, including the following steps:

[0109] Step S11: For each fractured horizontal well in the reservoir, according to the first actual production data of each fracture point of the fractured horizontal well, calculate the half-length of the fracture at the fracture point.

[0110] Wherein, the fractured horizontal well refers to a horizontal well that has been fractured and put into production.

[0111] Wherein, the first actual production data includes the oil production at each time step of the fracturing point.

[0112] Calculating the half-length of the fracture at each fracturing point, specifically, it may be to fit the root of the time corresponding to each time step in the first actual production data as the abscissa and the time step corresponding to the first actual produ...

Embodiment 2

[0155] The calculation of the fracturing potential value of each fracturing point of the fractured horizontal well in step S12 of the above-mentioned embodiment 1, or the calculation of the fracturing potential value of each data point of the horizontal well to be fractured in step S17, can be specifically according to the embodiment of the present invention II provides a method for calculating the fracturing potential value of horizontal wells, and the process is as follows image 3 shown, including the following steps:

[0156] Step S31: Acquiring the values ​​of various indicators at each depth point of the horizontal well used for the calculation of the fracturing potential value.

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Abstract

The invention discloses a method and a device for calculating fracture conductivity value of a horizontal well to be fractured. The method comprises the following steps: for each fractured horizontalwell, calculating the fracture half length according to the first actual production data of each fracturing point; according to the fracturing potential value of each fracturing point, the candidate models of multiple fracture conductivity values are established respectively, the simulated yield data being generated by the numerical simulator respectively; selecting a candidate model whose fittingvalue between the simulated yield data and the second actual yield data is smaller than a preset fitting threshold as the selected model; according to the selected model, the fracture conductivity ofeach fracturing point is calculated. Based on the fracture conductivity and fracture potential values of fractured horizontal wells, the fracture conductivity values of the data points of the horizontal wells to be fractured are calculated. The fracture conductivity calculated by this scheme has a high accuracy in predicting the production rate, which provides an effective data basis for fracturing design of horizontal wells to be fractured and can better guide the development.

Description

technical field [0001] The invention relates to the technical field of fracturing of horizontal wells, in particular to a method and device for calculating the conductivity value of fractures of horizontal wells to be fractured. Background technique [0002] At present, hydraulic fracturing of horizontal wells is an important means to improve the effective production of reservoirs and enhance recovery in the process of oil and gas production. Whether the design of fracturing points is reasonable before fracturing starts directly affects oil and gas production and final recovery. yield. However, reservoirs come in various forms. For example, sandstone and shale are alternately distributed, and reservoir physical properties, oil and gas content, and rock compressibility all have complex heterogeneity characteristics, which make the design of reservoir fracturing points a huge challenge. challenge. [0003] At present, the existing fracturing point design methods have many li...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20Y02A10/40
Inventor 张凯杰苏玉亮王文东郝永卯袁彬
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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