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A co-based 2 -Experimental device and method for mass transfer of crude oil to enhance recovery of bypass flow crude oil

An experimental device and recovery factor technology, which is applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., can solve the problems of unconsidered, unsealed false cores, and recovery factor deviations, so as to improve the adaptability sex, avoid direct-driven effects

Inactive Publication Date: 2019-09-10
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
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Problems solved by technology

2) CO is not set 2 - Crude oil contact cavity, difficult to ensure CO 2 - Adequate contact and mass transfer of crude oil
Simultaneously the present invention is provided with airtight dummy rock core 205 in the rock core holder, can by adjusting the method for dummy rock core 205 and saturated oil rock core 207 lengths, to simulate different scales and scales of flowing crude oil, investigate crude oil scale to CO 2 -The influence of crude oil to enhance the recovery, but the conventional huff and puff test device does not set the fake core or the fake core is not sealed, the crude oil tends to flow to the left under high pressure, causing a large recovery deviation
[0007] 1)CO 2 The throughput experimental device is not equipped with CO 2 - Crude oil contact chamber 213, difficult to ensure CO 2 - adequate exposure to crude oil;
[0008] 2) The core holder lacks the buffer of the contact chamber, and the high-pressure CO 2 It is easy to enter the end of the core, and it will displace the crude oil at the end and affect the CO 2 - Crude oil mass transfer to enhance crude oil recovery by bypass flow
[0009] 3)CO 2 The huff and puff test device is not equipped with a sealed fake core 205 or a non-closed fake core, crude oil tends to flow to the left under high pressure, causing a large deviation in oil recovery
[0010] 4) The problem of adjusting and simulating crude oil flowing around in different sizes and scales is not considered by matching the length of the sealed pseudo-core 205 and the oil-saturated core 207

Method used

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  • A co-based <sub>2</sub> -Experimental device and method for mass transfer of crude oil to enhance recovery of bypass flow crude oil
  • A co-based <sub>2</sub> -Experimental device and method for mass transfer of crude oil to enhance recovery of bypass flow crude oil

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Embodiment Construction

[0061] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0062] Such as figure 1 As shown, a CO-based 2 - The experimental device for improving oil recovery by crude oil mass transfer, mainly including the improved core holder 200, which is used to coat the saturated oil core to simulate the occurrence state of crude oil flowing around, and at the same time provide CO 2 The high-temperature and high-pressure environment that interacts with crude oil mass transfer, the experimental equipment also includes: No. 1 pressure gauge 2, No. 1 valve 3, No. 1 metering pump 4, No. 2 valve 5, No. 2 pressure gauge 6, constant temperature box 7; , Constant speed and constant pressure pump 9, No. 2 metering pump 10, No. 3 valve 11, No. 3 pressure gauge 12, back pressure valve 13 and oil-gas separator 14.

[0063] The core...

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Abstract

The invention discloses an experimental device and method for increasing the flowing-around crude oil recovery ratio on the basis of the CO2-crude oil mass transfer effect. The experimental device mainly comprises an improved rock core clamping device used for wrapping a saturated oil rock core, simulating the existence state of flowing-around crude oil and meanwhile providing the high-temperatureand high-pressure environment of the CO2 and crude oil mass transfer effect, and the experimental device can be used for researching the adaptability, the optimum gas injecting mode and condition andthe like of the CO2-crude oil mass transfer effect for increasing the flowing-around crude oil recovery ratio. The experimental device and method for increasing the flowing-around crude oil recoveryratio on the basis of the CO2-crude oil mass transfer effect have the advantages that the experimental device and method are used for researching the adaptability, the optimum gas injecting mode and condition and the like of the CO2-crude oil mass transfer effect for increasing the flowing-around crude oil recovery ratio; reference is provided for researching of increasing the flowing-around crudeoil recovery ratio; and the technical thought of increasing the flowing-around crude oil recovery ratio is provided, namely, the flowing-around crude oil recovery ratio is increased through the CO2-crude oil mass transfer effect and is increased not only through regular air suction profile adjustment.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development engineering, in particular to a CO-based 2 -Experimental device and method for improving oil recovery by crude oil mass transfer. Background technique [0002] CO 2 Oil displacement and storage are one of the focuses of current research on enhancing oil recovery and suppressing the greenhouse effect. CO 2 With good oil displacement ability, the recovery rate of miscible flooding can reach 100% theoretically, and at the same time realize CO 2 underground storage. while CO 2 Is one of the main greenhouse gases, more than 66% of climate warming and human activities emit CO 2 related. At the Copenhagen Climate Conference, my country promised that by 2020, the unit of GDP CO 2 Emissions will drop by 40% to 45% compared to 2005. Therefore, people use CO 2 oil displacement while achieving CO 2 Buried, high hopes. [0003] Due to the heterogeneity of reservoirs, especiall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/16
Inventor 丁名臣王任卓高苗王业飞杨震陈旭曲正天
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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