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

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...

AI Technical Summary

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

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