Nuclear magnetic resonance experiment method and device for determining producing degree of fluid in porous medium

A technology of nuclear magnetic resonance and experimental methods, which is applied in the field of petroleum engineering and fluid flow research, can solve the problem of inability to obtain the degree of crude oil production of the fluid distribution state inside the core

Inactive Publication Date: 2018-10-09
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Application Information

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Problems solved by technology

[0007] In view of the deficiencies of the prior art, especially the inability to obtain the distribution state of the fluid inside the core and the degree of crude oil production in different pore diameters in ordinary core displacement experiments, the present invention provides an experimental method and device for measuring the characteristics of fluid production in porous media

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  • Nuclear magnetic resonance experiment method and device for determining producing degree of fluid in porous medium
  • Nuclear magnetic resonance experiment method and device for determining producing degree of fluid in porous medium
  • Nuclear magnetic resonance experiment method and device for determining producing degree of fluid in porous medium

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Embodiment 1

[0050] Such as figure 1 As shown, a nuclear magnetic resonance experimental device for determining the characteristics of fluid movement in porous media, including:

[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 confining pressure control ...

Embodiment 2

[0059] A nuclear magnetic resonance experimental method for measuring fluid movement characteristics in porous media, 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, measure the oil phase T ...

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Abstract

The invention relates to a nuclear magnetic resonance experiment method and device for determining the producing characteristic of fluid in a porous medium, and belongs to the field of petroleum engineering and fluid research. The device comprises a nuclear magnetic resonance imaging unit, a computer system and a core flooding system. Current core flooding experiments in laboratories only calculate terminal oil pump capacity, and cannot obtain distribution state inside cores and producing degrees of pore throats with different pore diameters. The method and device have the advantages that theproducing characteristic of the fluid in the porous medium is researched through a low-field nuclear magnetic resonance imaging technology, the core flooding experiments can be combined with an on-line nuclear magnetic resonance technology through a nuclear magnetic resonance T2 spectrum analysis technology, the change characteristic of fluid signals in the porous medium is obtained through T2 spectrum on-line detection, and further the producing characteristic of crude oil in the porous medium is defined, so that an accurate and real research result of producing of the fluid in the porous medium is obtained.

Description

technical field [0001] The invention relates to a nuclear magnetic resonance experimental method and device for measuring fluid movement characteristics in porous media, belonging to the fields of petroleum engineering and fluid flow research. Background technique [0002] Fluid migration in porous media exists widely in nature and many industrial processes. Related research is of great significance to many fields such as oil and gas field development, environmental pollution prediction and control, seawater intrusion, and carbon dioxide underground storage. [0003] For example, in the field of oil and gas field development, understanding the oil phase distribution and producing law in the reservoir is the premise to improve the effect of water flooding development. Physical simulation experiment is a widely accepted research method, but at present, ordinary core displacement experiments can only calculate the terminal oil production. The distribution state of the fluid ins...

Claims

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Application Information

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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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