Device and experimental method for diffusion and oil discharge of carbon dioxide in tight oil reservoir

A carbon dioxide and tight oil technology, applied in the field of tight oil exploration, can solve problems such as complex diffusion and mass transfer mechanism
CN107632136AActive Publication Date: 2018-01-26INST OF MECHANICS - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF MECHANICS - CHINESE ACAD OF SCI
Publication Date
2018-01-26

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Abstract

The invention discloses a device for diffusion and oil discharge of carbon dioxide in a tight oil reservoir, wherein the device includes a temperature control room, a gas storage tank, a temperature and pressure controller and an extraction tank; the temperature control room is used for controlling constancy of the temperature in a diffusion and oil discharge experimental process, and the interiorof the temperature control room is provided with a nuclear magnetic resonance instrument and a reaction kettle, wherein the reaction kettle is located in the nuclear magnetic resonance instrument andused for accommodating dense oil samples; the gas storage tank is used for storing carbon dioxide and transporting carbon dioxide to the reaction kettle; the temperature and pressure controller is used for regulating the temperature and pressure of the storage tank and the temperature control room, so as to analyze diffusion and oil discharge of carbon dioxide with different phase states; the extraction tank is used for extracting petroleum oil components in carbon dioxide outputted by the reaction kettle to be used as detection samples of gas chromatography. The invention also discloses an experimental method for diffusion and oil discharge of the tight oil reservoir. The device and the experimental method can measure the temperature, pressure, oil output capacity and dynamic distribution of residual oil in matrix pores in the process of diffusion and oil discharge of carbon dioxide with different phase states in real time, and help to deeply understand a diffusion and mass transfermechanism of carbon dioxide in tight oil.
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Description

technical field

[0001] The invention belongs to the technical field of tight oil exploration, and in particular relates to a device and an experimental method for carbon dioxide diffusion and oil discharge in tight oil reservoirs. Background technique

[0002] my country's tight oil resources are widely distributed and have broad development potential. It is also one of my country's strategic energy sources. At present, the outstanding problems faced by tight oil development are low single well production and rapid production decline. Therefore, it is particularly important to study the energy supplement of tight oil reservoirs and improve the production rate of tight oil reservoirs. The study found that injecting carbon dioxide into the formation is an important method to replenish formation energy and enhance recovery, and this method has received extensive attention in the field of oil and gas field development. Due to the characteristics of low porosity and low permeabi...

Claims

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