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Channel fracturing research device and method based on heterogeneous soft-magnetism propping agent

A channel fracturing and proppant technology, which is applied in the research field of oil and gas field development, can solve the problems of lack of proppant laying methods and laying effect monitoring methods, and achieve the effect of high conductivity

Inactive Publication Date: 2018-12-18
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although channel fracturing technology has great advantages, how to lay proppant to achieve the best seepage state of oil and gas has always been a hot and difficult research point due to the lack of effective proppant laying methods and laying effect monitoring methods

Method used

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  • Channel fracturing research device and method based on heterogeneous soft-magnetism propping agent
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  • Channel fracturing research device and method based on heterogeneous soft-magnetism propping agent

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Experimental program
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Effect test

Embodiment 1

[0039] A channel fracturing device based on heterogeneous soft magnetic proppant, the fracturing fluid container is respectively connected to the sand mixing container and the injection pump through pipelines, and the heterogeneous soft magnetic proppant container is connected to the sand mixing container through pipelines, The sand mixing container is connected to the injection pump through pipelines, and the injection pump is connected to the fracture model through pipelines, and valves are arranged on each connecting pipeline. Among them, the magnetic material of the heterogeneous soft magnetic proppant is a combination of iron particles, silicon steel particles and nickel-iron alloy particles with particle size distribution of 20-70 mesh and sphericity distribution of 0.5-0.9. A flowmeter is arranged on the connecting pipeline between the fracturing fluid dissolver and the injection pump, and a flowmeter is arranged on the connecting pipeline between the injection pump and ...

Embodiment 2

[0041] This embodiment describes a kind of operation steps of the device described in Embodiment 1:

[0042] (1) Arrange the indoor experimental site, select the crack model with a crack width of 0.2cm, according to the connection method described in Example 1 and refer to figure 1 Install the experimental device;

[0043] (2) Configure fracturing fluid in the fracturing fluid container, do not add non-uniform soft magnetic proppant for now, turn on the power, turn on the injection pump, open the valve on the fracturing fluid delivery pipeline, and pump the fracturing fluid into the fracture model In , the fracturing fluid is precirculated in the fracture model;

[0044] (3) A soft magnetic proppant with iron particles and silicon steel particles as the main material and a sphericity of 0.5 to 0.9 is arranged in the heterogeneous soft magnetic proppant container, wherein the proppant mesh number is 20 mesh;

[0045] (4) Input the fracturing fluid and heterogeneous soft magne...

Embodiment 3

[0057] The difference between this embodiment and embodiment 2 is that the mesh number of the proppant is 40 mesh, and other experimental conditions are the same. image 3 As shown, figure (b) in the figure is a partially enlarged form of figure (a).

[0058] From image 3 It can be seen from (a) that the non-uniform paving shape of 40 mesh proppant in the fracture model with a width of 0.2 cm is different from that of figure 2 The proppant distribution characteristics in (a) are similar, and the width of the proppant column is about the same as that of the channel fracture. From image 3 It can be seen from (b) that the order of magnitude of proppant column width and channel width is also 10 -5 m, the area occupied by the proppant columns on the entire fracture plane is larger than that of channel fractures, and the overall channel ratio is almost the same as that of channel fractures. figure 2 same.

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Abstract

The invention provides a channel fracturing research device and method based on a heterogeneous soft-magnetism propping agent. The device comprises a fracturing fluid container, a sand mulling container, an injecting pump and a crack model which are sequentially connected through a pipeline, the sand mulling container is further connected with a heterogeneous magnetic propping agent container through a pipeline, and the fracturing fluid container is connected with the injecting pump through a pipeline; magnetic materials of the heterogeneous soft-magnetism propping agent are magnetic particleswith different sizes, wherein the particle size distribution is 20-70 meshes, and the sphericity distribution is 0.5-0.9; the magnetic materials comprise one or a combination of more of iron, siliconsteel and ferro-nickel. With indoor research of channel fracturing being a starting point, by adjusting the ambient magnetic field intensity of the visible crack mode, the distribution form of the heterogeneous soft-magnetism propping agent in the crack model is controlled, and the aim of laying sand without evenness is realized. The method is a new control method for laying the propping agent when indoor research of a channel fracturing technology.

Description

technical field [0001] The invention relates to a research device for channel fracturing based on heterogeneous soft magnetic proppant, which belongs to the research field of oil and gas field development. Background technique [0002] Since the emergence of hydraulic fracturing technology, how to obtain higher artificial fracture conductivity has become the main research direction. After a long period of development, many scholars and engineers have proposed a series of improvement measures, such as reducing proppant fragmentation rate, Improve proppant sphericity, increase fracturing fluid flowback, reduce residue retention damage, use new fracturing fluid, etc., but these measures are all based on continuous sand laying to obtain the theoretical maximum flow conductivity, and According to some post-fracture evaluation results, the actual fracture conductivity is far from the design optimal value. [0003] In order to make up for the shortcomings and deficiencies in the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/267E21B47/00E21B49/00
Inventor 张景臣陈凯安恒旭杨岩王丹
Owner CHINA UNIV OF PETROLEUM (BEIJING)