Nuclear magnetic resonance experiment device and method for multi-phase fluid flow characteristic in dense core porous media

A nuclear magnetic resonance and porous media technology, which is applied in the fields of petroleum engineering and fluid flow research, and can solve problems such as the degree of crude oil production that cannot be obtained from the distribution of fluid inside the core.

Inactive Publication Date: 2019-03-08
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, especially the inability to obtain the distribution state of the fluid inside the core and the production degree of crude oil in different pore diameters in ordinary core displacement experiments, the present invention provides a method for measuring the flow characteristics of multiphase fluids in porous media of tight cores. Experimental method and device

Method used

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  • Nuclear magnetic resonance experiment device and method for multi-phase fluid flow characteristic in dense core porous media
  • Nuclear magnetic resonance experiment device and method for multi-phase fluid flow characteristic in dense core porous media
  • Nuclear magnetic resonance experiment device and method for multi-phase fluid flow characteristic in dense core porous media

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Embodiment 1

[0050] Such as figure 1 As shown, a nuclear magnetic resonance experimental device for determining the flow characteristics of multiphase fluids in porous media of tight cores includes:

[0051] Core displacement system, nuclear magnetic resonance detection system and data acquisition system;

[0052] The core displacement system includes a water storage container 1, an ISCO pump 2, an intermediate oil storage container 3, a displacement fluid intermediate container 4, a rock core 5, a confining pressure control system 6 and a core holder 9; the water storage The container 1 is connected to the ISCO pump 2 through a valve, and the ISCO pump 2 is respectively connected to the oil storage intermediate container 3 and the displacement fluid intermediate container 4 through the valve; the core holder 9 is provided with a core 5 and is respectively connected to the storage The oil intermediate container 3, the displacement fluid intermediate container 4 are connected to the confin...

Embodiment 2

[0059] A nuclear magnetic resonance experimental method for measuring fluid movement characteristics in porous media of tight rock cores, comprising the following steps:

[0060] (1) carry out mercury intrusion experiment with dry rock core 5, record rock core distribution range;

[0061] (2) cutting the rock core 5 into a designed length, cutting a fracture along the axial direction, and then cleaning, drying, and soaking crude oil to saturation with a vacuum pressurization method;

[0062] (3) After raising the temperature of the non-magnetic core holder 9 to the target formation temperature for 30 minutes, measure T with a nuclear magnetic resonance detection system 2 Signal as the basic signal of the system;

[0063] (4) The oil-saturated rock core 5 is put into the rock core holder 9, and the rock core holder 9 is placed between the nuclear magnetic resonance test magnets 8;

[0064] (5) After the core holder 9 is heated to the target formation temperature of 60°C, meas...

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Abstract

The invention relates to a nuclear magnetic resonance experiment device and method for multi-phase fluid flow characteristic in dense core porous media, and belongs to the field of petroleum engineering and fluid research. The device consists of a nuclear magnetic resonance spectrometer system, a magnet system, a radio frequency system and a core displacement system. At present, a core displacement experiment in a laboratory only can calculate the oil discharge amount of a terminal, and a distribution state in the core and the pore throat utilization degree of different apertures cannot be obtained. According to the device, a low-field nuclear magnetic resonance technology is adopted to research fluid flow characteristics in the dense core porous media, the core displacement experiment andan online nuclear magnetic resonance technology are combined through a nuclear magnetic resonance T2 spectrum analysis technology, the change characteristics of a fluid signal in the porous media canbe obtained through the online detection of the T2 spectrum so as to make the utilization characteristics of crude oil in the porous media clear, and an accurate and true research result of fluid flow in the dense core porous media is obtained.

Description

technical field [0001] The invention relates to a nuclear magnetic resonance experimental device and method for measuring the flow characteristics of multiphase fluid in a dense rock core porous medium, belonging to the fields of petroleum engineering and fluid flow research. Background technique [0002] Tight oil and gas has attracted widespread attention around the world because of its resource potential and exploration value. Fluid flow in the porous media of tight cores is complex, and relevant research is of great significance for the deep understanding and efficient development of unconventional oil and gas resources. [0003] For example, in the field of oil and gas field development, understanding the distribution and flow of oil phases in the reservoir is the prerequisite for improving the effect of water flooding development. Physical simulation experiments are widely accepted research methods, but at present, ordinary core displacement experiments can only calcul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N24/08
CPCG01N24/08Y02A90/30
Inventor 戴彩丽程睿孙永鹏由庆赵明伟吴一宁赵光
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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