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Horizontal well staged fracturing technology construction scheme optimization design method and system

A construction plan and staged fracturing technology, applied in neural learning methods, design optimization/simulation, earthwork drilling and production, etc., can solve unconventional reservoirs that cannot be economically developed, objective functions cannot determine the optimal value, and increase mining costs and other issues, to achieve the effect of ensuring economical and efficient development, fast operation speed, and high calculation accuracy

Pending Publication Date: 2022-05-27
XI'AN PETROLEUM UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current common optimization method of fracturing fracture parameters mainly takes single well productivity as the objective function, which will cause the objective function to increase linearly with the fracture parameters and cannot determine the optimal value, and this method fails to comprehensively consider fracturing fracture parameters and construction The relationship between costs, adjusting the parameters of fracturing fractures will greatly increase the cost of production, making unconventional reservoirs uneconomical to develop

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  • Horizontal well staged fracturing technology construction scheme optimization design method and system
  • Horizontal well staged fracturing technology construction scheme optimization design method and system
  • Horizontal well staged fracturing technology construction scheme optimization design method and system

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Embodiment 1

[0055] The process of the present embodiment is as follows:

[0056] The fracture parameters of the shale reservoir Y1 were optimized, and the design formation pressure was 37 MPa, the effective thickness of the target layer was 33.1 m, the gas reservoir depth was 1080 m, the porosity was 4.4%, and the permeability was 0.008 mD. The gas saturation is 42.80%,the number of cracks can be selected from 6 to 13, and the numerical spacing is 1; the length of the crack half-seam can be selected from 80m to 150m, and the numerical spacing is 10m; the crack spacing can be selected from 70m to 120m, and the numerical spacing is 10m; and the fracture conduction capacity can be selected from 5μm 2 ·cm-30μm 2 Cm, the value spacing is 5 μm 2 The horizontal well segment length selection range is 1500m-1850m, and the numerical spacing is 50m.

[0057]The corrcoef function is used to test the similarity between the prediction result of the sample and the real result, and the learning parameters ar...

Embodiment 2

[0065] The process of the present embodiment is as follows:

[0066] The fracture parameters of the S1 well of the dense sandstone reservoir were optimized, and the design formation pressure was 29 MPa, the effective thickness of the destination layer was 19.8m, the gas reservoir depth was 3300 m, the porosity was 6.3%, and the permeability was 0.21 mD. The gas saturation is 46.50%,the number of cracks can be selected from 5 to 14, and the numerical spacing is 1; the length of the crack half-seam can be selected from 70m to 130m, and the numerical spacing is 10m; the crack spacing can be selected from 80m to 130m, and the numerical spacing is 10m; and the fracture conduction capacity can be selected from 5μm 2 ·cm-25μm 2 Cm, the value spacing is 5 μm 2 The horizontal well segment length selection range is 1800m-2300m, and the numerical spacing is 50m.

[0067]The corrcoef function is used to test the similarity between the prediction result of the sample and the real result, and t...

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Abstract

The invention discloses a horizontal well staged fracturing technology construction scheme optimization design method and system, and the method comprises the following steps: taking reservoir basic parameters of different construction schemes of a target reservoir needing optimization design as input layer data of a pre-trained reservoir horizontal well staged fracturing yield prediction model; the cumulative gas production rate of the single well in the preset time of the different construction schemes after the target reservoir is fractured is obtained; taking the accumulated gas production as input of a reservoir fracturing economic benefit calculation model to obtain economic benefits under different construction schemes; a construction scheme with the highest cumulative yield, the lowest fracturing construction cost and the highest fracturing economic benefit of the single well within the preset time is screened out; during construction, the crack parameters corresponding to all the construction schemes serve as construction parameters of all the construction schemes, and optimal design of the construction scheme of the horizontal well staged fracturing technology is achieved. By means of the scheme, on-site fracturing construction can be guided, and economic and efficient development of unconventional reservoirs can be guaranteed.

Description

Technical field [0001] The present invention relates to the field of oil and gas field development, in particular to a horizontal well segment fracturing technology construction scheme optimization design method and system, for horizontal well segment fracturing process of the fracturing fracture parameters optimization design, to guide the oilfield site hydraulic fracturing construction design. Background [0002] Unconventional oil and gas resources such as shale gas and tight sandstone gas are abundant in reserves and have broad prospects for exploration, but due to their difficulties in development due to their low porosity, low permeability, strong reservoir heterogeneity, etc., conventional exploration technology and exploitation methods can no longer meet the development needs of such oil and gas reservoirs. Horizontal well segmentation technology can increase the contact area between the wellbore and the reservoir, improve the reservoir permeability, thereby increasing th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13G06F30/27E21B43/26G06N3/04G06N3/08
CPCG06F30/13G06F30/27E21B43/26G06N3/084E21B2200/22G06N3/044
Inventor 周德胜接叶楠王海洋严乐王小香邹易
Owner XI'AN PETROLEUM UNIVERSITY