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An experimental device and method for developing shale oil by huffing and puffing of supercritical co2/h2o mixed fluid

A technology of mixing fluids and experimental methods, which is applied in the direction of measuring devices, instruments, and nuclear magnetic resonance analysis, etc., to achieve the effects of easy operation of the device, simple steps of the method, and accurate measurement

Active Publication Date: 2022-04-22
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no report on this research at present, and experiments need to be designed to evaluate the production-increasing effect of this method

Method used

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  • An experimental device and method for developing shale oil by huffing and puffing of supercritical co2/h2o mixed fluid
  • An experimental device and method for developing shale oil by huffing and puffing of supercritical co2/h2o mixed fluid
  • An experimental device and method for developing shale oil by huffing and puffing of supercritical co2/h2o mixed fluid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0163] A supercritical CO 2 / H 2 O Mixed fluid huff and puff experimental device for developing shale oil, the device includes: CO 2 Storage tank 1, booster pump 1, 2, booster pump 2, 3, steam generator 4, pressure gauge 1, 5, humidity meter 6, mixing container 7, vacuum pump 8, gas flow meter 9, booster pump 3 No. 10, injection valve 11, pressure gauge 2, No. 12, two-way valve 13, drying tube 14, absorbent cotton 15, hand pump 16, pressure gauge 3, No. 17, core holder 18, pressure gauge 4, No. 19, measuring cylinder 20 , holding liquid pan 21, thermostat box 22 and displacement pump 23.

[0164] During use, at first open incubator 22, make constant temperature in incubator 22. Turn on the vacuum pump 8 to vacuumize the mixing container 7 and the pipeline. Open CO 2 Storage tank 1, using booster pump 1, No. 2 to CO 2 Inject into mixing container 7, container pressure is read by No. 5 of pressure gauge 1. Turn on the water vapor generator 4, use the booster pump No. 2 an...

Embodiment 2

[0225] In this example, the actual geological shale core of an oilfield in China is used to evaluate the supercritical CO 2 / H 2 Effect of O mixed fluid huff and puff in developing shale reservoirs to enhance recovery. Supercritical CO 2 Huff and puff experiments and supercritical CO 2 / H 2 O mixed fluid throughput experiment. The experimental steps are as follows:

[0226] Supercritical CO2 huff and puff experiment:

[0227] (1) The oil sample used in the experiment: formation oil.

[0228] (2) Test the basic physical properties of the core: measure the dry weight, length, and diameter of the core, and saturate the simulated oil. Then measure the wet weight of the core and calculate the saturated oil content.

[0229] (3) Determining the distribution of initial crude oil: Put the fully saturated rock core in the nuclear magnetic resonance equipment for experiments to test the distribution of simulated oil in the core.

[0230] (4) Supercritical CO2 throughput experim...

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Abstract

The invention discloses a supercritical CO 2 / H 2 O mixed fluid huff and puff experimental device and experimental method for developing shale oil, the experimental device includes CO 2 Storage tanks, steam generators, mixing vessels and core holders, etc., CO 2 The storage tank and the steam generator are respectively connected with the mixing container, the upper end of the mixing container is connected with a pressure gauge No. 1 and a hygrometer, and the lower end of the mixing container is connected with a displacement pump; the mixing container is connected with the inlet end of the core holder, and the The gas flow meter, booster pump No. 3, injection valve and pressure gauge No. 2 are arranged in sequence on the mixed fluid delivery pipeline; the core holder is connected to the inlet end of the drying pipe, and absorbent cotton is arranged inside the drying pipe. The outlet end of the gas extraction pipe is connected to the graduated cylinder, and the graduated cylinder is placed upside down in the liquid container, wherein the liquid container and the graduated container are filled with saturated sodium carbonate solution. The invention can simulate the actual throughput increase process of the shale reservoir, and conduct experimental evaluation on the throughput effect under different parameters.

Description

technical field [0001] The invention relates to the field of petroleum engineering-oil and gas field development engineering, in particular to the development of unconventional oil reservoirs, and more specifically to a supercritical CO 2 / H 2 O Mixed fluid huff and puff experimental device and method for developing shale oil. Background technique [0002] With the exploration and development of oil and gas resources, the demand for oil and natural gas continues to increase, and the remaining reserves of conventional oil and gas resources are decreasing. Unconventional oil and gas resources (tight oil, shale gas, shale oil, etc.) increasingly important role in industry. my country's shale oil resource reserves are very huge, and the national geological reserves have reached 1420×10 8 t, of which recoverable reserves are up to 30×10 8 ~60×10 8 t, has a good development prospect. At present, the comprehensive application of horizontal well and multi-stage fracturing tech...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N24/08
CPCG01N24/081G01N33/241G01N5/02G01N1/38
Inventor 李蕾周晓梅苏玉亮陈征徐北辰刘妤萱杨智文
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)