A simulation experiment method and experimental device for fracturing proppant transportation with real-time variable sand ratio

A technology of fracturing proppant and simulation experiment, which is applied in the field of fracturing reconstruction of oil and gas wells and coalbed methane wells, and can solve the problems of not being able to realize real-time, changing sand ratio, etc.

Active Publication Date: 2021-03-09
CHINA UNITED COALBED METHANE +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] One purpose of the present invention is to provide a fracturing proppant transport simulation experiment method for real-time variable sand ratio in view of the deficiency that traditional proppant delivery devices cannot realize real-time change of sand ratio

Method used

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  • A simulation experiment method and experimental device for fracturing proppant transportation with real-time variable sand ratio
  • A simulation experiment method and experimental device for fracturing proppant transportation with real-time variable sand ratio
  • A simulation experiment method and experimental device for fracturing proppant transportation with real-time variable sand ratio

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Embodiment Construction

[0039] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0040] like figure 1 As shown, the fracturing proppant delivery simulation experiment device for real-time variable sand ratio of the present invention includes a simulated crack 1, a sand mixing cylinder 9 connected to the simulated crack, a sand inlet system connected to the sand inlet 5 of the sand mixing cylinder, A liquid inlet system connected to the liquid inlet 12 of the sand mixing cylinder.

[0041] The sand feeding system includes a sand storage hopper 2, and a load cell 3 is installed on each of the front, rear, left, and right side walls of the sand storage hopper, which can weigh and record the change of proppant quality. Four weighing sensors measure...

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Abstract

The invention discloses a fracturing proppant transportation simulation experiment method for real-time variable sand ratio, comprising the following steps: (1) measuring the bulk density ρ of the proppant t and apparent density ρ s ; (2) Set the value C of the initial sand ratio 1 ; (3) Set the fracturing fluid volume flow rate V f (4) Calculate the mass flow rate W of the required proppant by the volume flow rate of the fracturing fluid and the given sand ratio p , according to W p Calculate the servo motor speed n; (5) According to the determined fracturing fluid volume flow V f Pump proppant and fracturing fluid into the sand mixing cylinder at the same time as the speed n of the servo motor. When the liquid in the sand mixing cylinder reaches the high water level limit, stop pumping the fracturing fluid and proppant, open the sand mixing fluid outlet of the sand mixing cylinder, The sand mixing fluid is injected into the simulated fracture; when the liquid in the sand mixing cylinder reaches the limit of the low water level, the fracturing fluid and proppant are pumped into the sand mixing cylinder; (6) Change the value of the sand ratio and repeat steps (3) to (5 ), to achieve the purpose of changing the sand ratio in real time in the fracturing proppant delivery simulation experiment.

Description

technical field [0001] The invention relates to the technical field of fracturing reconstruction of oil and gas wells and coal bed gas wells. In particular, a fracturing proppant transportation simulation experiment method and experimental device for real-time variable sand ratio. Background technique [0002] Hydraulic fracturing is an important measure for oil and gas wells and coalbed methane wells to be put into production and increase production. Its basic principle is to use ground high-pressure pumps to pump fracturing fluid into the well to create fractures in the formation. When fractures are generated in the formation, fracturing fluid containing proppant (also known as sand mixing fluid) is pumped in to prevent the fractures from reclosing after fracturing. The process of fracturing fluid carrying proppant into formation fractures is called proppant delivery process. The delivery of proppant affects the distribution state of proppant in fractures, which is the k...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00
CPCG01N33/00
Inventor 张平杨兆中李丹琼贾敏李小刚程璐夏日桂廖梓佳
Owner CHINA UNITED COALBED METHANE
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