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Device and method for evaluating carbon dioxide huffing-puffing recovery rate of shale oil

A carbon dioxide and evaluation method technology, applied in the field of petroleum engineering, can solve problems such as inability to obtain crude oil recovery

Inactive Publication Date: 2018-08-17
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While existing measurements of CO 2 Huff and puff devices and methods cannot obtain oil recovery existing in shale micro-fractures and matrix

Method used

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  • Device and method for evaluating carbon dioxide huffing-puffing recovery rate of shale oil
  • Device and method for evaluating carbon dioxide huffing-puffing recovery rate of shale oil
  • Device and method for evaluating carbon dioxide huffing-puffing recovery rate of shale oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Set the temperature of the thermostat 10 at 60.0°C, select the shale sample that has been washed and dried, that is, the core 11, with a length of 3.982 cm and a diameter of 2.48 cm, and the weight of the core 11 is 39.177 g. The annular volume of holder 6 is 2.26cm 3 , into the radial core holder 6, open the first stop valve 101 and the ninth stop valve 109, and increase the confining pressure to the core 11 in the radial core holder 6 to 16 MPa through the confining pressure pump 1, after vacuuming , open the eighth shut-off valve 108, saturated dodecane 12, calculate the saturated dodecane 12 that enters to be 3.515g, open the third shut-off valve 103, inject a certain amount of CO in the visible container 3 2 When the gas reaches a pressure of 12MPa, open the fourth shut-off valve 104, keep the balance stable for 48 hours, close the fourth shut-off valve 104, open the seventh shut-off valve 107 and the fifth shut-off valve 105 for open-well production until the end ...

Embodiment 2

[0088] Set the temperature of the thermostat 10 at 60.0°C, select the shale sample that has been washed and dried, that is, the core 11, with a length of 3.982 cm and a diameter of 2.48 cm, and the weight of the core 11 is 39.177 g. The annular volume of holder 6 is 2.26cm 3 , into the radial core holder 6, open the first stop valve 101 and the ninth stop valve 109, and increase the confining pressure to the core 11 in the radial core holder 6 to 16 MPa through the confining pressure pump 1, after vacuuming , open the eighth cut-off valve 108, saturated dodecane 12, calculate the saturated dodecane 12 to be 3.514g, open the second cut-off valve 102, and inject a certain volume of isopropyl in the visible container 3 through the micro-injection pump 2 Alcohol 13, open the third shut-off valve 103, inject a certain amount of CO in the visible container 3 2 gas to isopropanol 13 with CO 2 Mixed phases, depending on the pressure of container 3 to 12MPa, calculate isopropanol 13 ...

Embodiment 3

[0090]Set the temperature of the thermostat 10 at 60.0°C, select the shale sample that has been washed and dried, that is, the core 11, with a length of 3.982 cm and a diameter of 2.48 cm, and the weight of the core 11 is 39.177 g. The annular volume of holder 6 is 2.26cm 3 , into the radial core holder 6, open the first stop valve 101 and the ninth stop valve 109, and increase the confining pressure to the core 11 in the radial core holder 6 to 16 MPa through the confining pressure pump 1, after vacuuming , open the eighth cut-off valve 108, saturated dodecane 12, calculate the saturated dodecane 12 to be 3.515g, open the second cut-off valve 102, and inject a certain volume of isopropyl in the visible container 3 through the micro-injection pump 2 Alcohol 13, open the third shut-off valve 103, inject a certain amount of CO in the visible container 3 2 gas to isopropanol 13 with CO 2 Mixed phases, depending on the pressure of container 3 to 12MPa, calculate isopropanol 13 i...

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Abstract

The invention discloses a device and a method for evaluating the carbon dioxide huffing-puffing recovery rate of shale oil. The device is characterized in that a radial rock core holder, a confining pressure pump and a first pressure sensor are respectively connected with a first tee joint, a simulated oil saturation pump, a third pressure sensor and the radial rock core holder are respectively connected with a fourth tee joint, the rock core holder, an oil-gas separator and a vacuum pump are respectively connected with a third tee joint, the oil-gas separator is communicated with the outside,the rock core holder is connected with a visual container, and the visual container, a second pressure sensor and a micro-injection pump are connected through a second tee joint; a CO2 storage tank is connected with the visual container; and the whole device controls the temperature through a thermotank. The device and the method allow the micro-crack and the matrix recovery rate to be respectively obtained, can analysis the contribution of adsorbed dissolved crude oil in organic matters to the recovery rate, and are of great significance to design an onsite exploitation scheme.

Description

technical field [0001] The invention relates to the field of petroleum engineering, in particular to a device and method for evaluating the recovery rate of carbon dioxide huff and puff of shale oil. Background technique [0002] With the continuous development and consumption of conventional oil and gas resources, the world petroleum industry is making a leap from conventional oil and gas to unconventional oil and gas. Unconventional oil and gas are mainly shale system oil and gas, including tight oil and gas, shale oil and gas. Tight oil and gas are oil and gas stored in reservoirs such as tight sandstone or limestone, and the oil and gas have experienced short-distance migration. Shale oil and gas refer to the oil and natural gas enriched in organic-rich black shale formations. The oil and gas have basically not experienced the migration process. At present, shale gas has become a hot spot in the exploration and development of unconventional natural gas in the world. Rel...

Claims

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Application Information

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IPC IPC(8): G01N5/00
CPCG01N5/00
Inventor 宫厚健朱超凡尚胜祥邹洪俊李亚军董明哲苏玉亮徐龙翟雯雯李子靳
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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