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A method for determining the laying form of a pulsed fiber sand fracturing propping agent group

A sand fracturing and proppant technology, which is applied in the field of oil and gas field exploration and development, can solve the problems of complex flow rules and the inability to describe the shape of proppant clusters quantitatively

Active Publication Date: 2019-03-08
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for determining the laying configuration of pulsed fiber-sand fracturing proppant group, which overcomes the current hydraulic pressure that is characterized by pulse injection of fracturing fluid, fracturing fluid + fiber + proppant mixture. Due to the complex flow law of fracturing technology, the defect that the form of proppant clusters in fractures cannot be quantitatively described can be intuitively and concisely quantified and described the form of proppant clusters in fractures. and optimize construction parameters to provide technical support and theoretical basis

Method used

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  • A method for determining the laying form of a pulsed fiber sand fracturing propping agent group
  • A method for determining the laying form of a pulsed fiber sand fracturing propping agent group
  • A method for determining the laying form of a pulsed fiber sand fracturing propping agent group

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Embodiment

[0058] The physical model of a large-scale flat fracture that simulates proppant transport in the laboratory is used as the research object (Guo Jianchun et al. Experimental study on factors affecting flow channel shape in channel fracturing[J]. Oil and Gas Geology and Recovery, 2017, 24(5: ): 115-119), the crack height of the plate is 0.6m, the crack length is 4.0m, and the crack width is 0.006m. The inlet at the left end of the plate enters liquid through three evenly distributed perforation holes (fluid direction is from left to right), and an outlet is arranged on the top of the right end to discharge liquid. Here, the method of the present invention is implemented with the flat plate fracture as an object to obtain the laying characteristics of the proppant group in the fracture.

[0059] According to the crack size of the flat plate, it is established in the CFD pre-processing software Gambit as follows: figure 1 In the geometric model shown, the three small rectangles ...

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Abstract

The invention discloses a method for determining the laying form of a pulsed fiber sand fracturing propping agent group. The method comprises the following steps of 1) determining geometric structureparameters of a hydraulic fracture; 2) measuring the rheological parameters of the fracturing fluid and the fiber fracturing fluid, and correcting to obtain the rheological parameters of the fracturing fluid, the fiber and the proppant mixed liquid; 3) establishing a hydraulic fracture geometric model, outputting a data file in the iges format, performing flow field calculation domain grid division, and outputting a grid file in the msh format; 4) treating the fracturing fluid and the fracturing fluid + fiber + proppant mixed liquid which are alternately injected by the pulses as two continuous fluid phases respectively, and establishing a CFD model of the two phases flowing in the crack; And 5) simulating the flow of the fracturing fluid and the mixed liquid pulse injected into the hydraulic fracture to obtain the pavement form of the propping agent group. The method can quantitatively describe the pavement form of the propping agent group in the fracture, and provides technical support and theoretical basis for researching the yield increasing mechanism of pulse fiber sand fracturing and optimizing construction parameters.

Description

technical field [0001] The invention relates to the field of exploration and development of oil and gas fields, in particular to a method for determining the form of proppant laying of hydraulic fracturing fractures in the process of increasing production of oil and gas reservoirs. Background technique [0002] With the deepening of exploration and development of oil and gas fields, the development of low-permeability and ultra-low-permeability oil and gas resources is playing an increasingly important role in China's oil industry, and will become the main battlefield of China's oil exploration and development in the future. Low-permeability and ultra-low-permeability reservoirs have poor physical properties and are difficult to put into production naturally, and economic development must be achieved through hydraulic fracturing. [0003] After decades of development, traditional hydraulic fracturing technology has become more and more perfect in fracturing materials such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50E21B43/267
CPCE21B43/267G06F30/20G06F2119/06
Inventor 张涛穆柯帆郭建春杨若愚
Owner SOUTHWEST PETROLEUM UNIV
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