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A device and method for testing relative permeability of cores

A relative permeability, core technology, applied in permeability/surface area analysis, measurement device, suspension and porous material analysis, etc., to achieve the effect of accurate evaluation and accurate migration range

Active Publication Date: 2018-08-10
PETROCHINA CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Since the geological storage of carbon dioxide in saline aquifers is an emerging research topic, the relative permeability of other forms of carbon dioxide and saline water is still blank

Method used

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  • A device and method for testing relative permeability of cores
  • A device and method for testing relative permeability of cores

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Embodiment Construction

[0039] The above and other technical features and advantages of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them.

[0040] see figure 1As shown, a device for testing the relative permeability of a rock core includes a clamping unit, a carbon dioxide supply unit 20, a salt water supply unit and a measurement unit.

[0041] The clamping unit includes a clamper 10, which has a sealed cavity for clamping the rock core, and an inlet 12 and an outlet 14 respectively communicated with the sealed cavity. The carbon dioxide supply unit 20 includes a booster pump 22 connected in sequence, a first storage tank 24 for storing gaseous carbon dioxide, and a second storage tank 26 for storing liquid carbon dioxide. The gaseous carbon dioxide is heated and kept warm to prepare supercritical carbon dioxide in the se...

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Abstract

The invention provides equipment and a method for testing relative permeability of rock cores. The equipment comprises a clamping unit, a carbon dioxide supply unit, a salt water supply unit and a measuring unit. A clamp of the clamping unit comprises a seal cavity, an inlet and an outlet. The carbon dioxide supply unit comprises a booster pump, a first storage tank and a second storage tank. The second storage tank is connected with the inlet. Gaseous carbon dioxide is heated by a heat insulation device, supercritical carbon dioxide is prepared in the second storage tank, and the supercritical carbon dioxide in the second storage tank is injected into the rock cores by a carbon dioxide injection pump. The salt water supply unit and the carbon dioxide supply unit are connected to the inlet in a parallel mode, and a salt water solution in a salt water container is injected into the rock cores by a salt water injection pump. The measuring unit comprises an inlet pressure meter, a gas-liquid separator, an outlet pressure meter, a gas flow meter and a measurer, the inlet pressure meter and the carbon dioxide supply unit are connected to the inlet in a parallel mode, the gas-liquid separator and the outlet pressure meter are connected to the outlet in a parallel mode, the gas flow meter is connected to the output end of the gas-liquid separator, and the measurer is used for measuring liquid mass. By the equipment, the relative permeability of two-phase fluids in the rock cores can be simulated and researched.

Description

technical field [0001] The invention relates to the technical field of oil and gas extraction, in particular to a device and method for testing the relative permeability of rock cores for simulating secondary oil and gas extraction. Background technique [0002] At present, more and more attention is paid to the control of greenhouse gases. Carbon dioxide is the main type of greenhouse gas, and the technology of reducing emissions through geological storage has gradually been developed. Usually, carbon dioxide is injected into deep saline formations for geological storage. When carrying out geological storage of carbon dioxide in saline formations, from the perspective of environment and safety, attention should be paid to indicators such as the maximum injection rate, cumulative injection capacity, and migration range during storage and injection, which depend on the carbon dioxide in saline formations. migration ability. [0003] When formation water and carbon dioxide ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 陈昌照陈宏坤李兴春杜显元张坤峰刘玉龙唐丹彭其勇
Owner PETROCHINA CO LTD
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