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Equipment and method for testing relative permeability of rock cores

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

Active Publication Date: 2016-07-20
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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  • Equipment and method for testing relative permeability of rock cores
  • Equipment and method for testing relative permeability of rock 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 with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments.

[0040] see figure 1As shown, an apparatus for testing the relative permeability of cores 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 holder 10, and the holder 10 has a sealing cavity for clamping the core, and an inlet 12 and an outlet 14 respectively communicating with the sealing cavity. The carbon dioxide supply unit 20 includes a booster pump 22, a first storage tank 24 for storing gaseous carbon dioxide, and a second storage tank 26 for storing liquid carbon dioxide, which are connected in sequence. The gaseous carbon dioxide is heated and kept warm to prepare and form supercritical...

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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 exploitation, in particular to a device and method for testing the relative permeability of cores for simulating secondary oil and gas exploitation. Background technique [0002] At present, the control of greenhouse gas has been paid more and more attention. As the main type of greenhouse gas, carbon dioxide emission reduction technology through geological storage has been gradually developed. Usually, carbon dioxide is injected into deep saline formations for geological storage. In the 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 the storage injection process. migration ability. [0003] When formation water and carbon dioxide are injected into saline formations at the same time, the flow characteri...

Claims

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Application Information

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Patent Type & Authority Applications(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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