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A multi-mode device for measuring the minimum miscible pressure of carbon dioxide

A carbon dioxide, miscible pressure technology, applied in measuring devices, measuring fluid pressure, instruments, etc., can solve the problems of uneven permeability distribution, can not represent the minimum miscible pressure and so on

Inactive Publication Date: 2016-12-14
NORTHEAST GASOLINEEUM UNIV
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Problems solved by technology

[0003] At present, the indoor experimental research of carbon dioxide flooding mainly includes carbon dioxide miscible flooding experiment and thin tube test minimum miscible pressure experiment. The main problem of narrow tube test minimum miscible pressure is that the current measurement is the minimum miscible pressure under a specific homogeneous condition. However, the actual reservoir has plane heterogeneity, that is, the permeability distribution from the injection well to the production well is not uniform, so the minimum miscible pressure obtained in the laboratory cannot represent the real minimum miscible pressure of the actual reservoir

Method used

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  • A multi-mode device for measuring the minimum miscible pressure of carbon dioxide
  • A multi-mode device for measuring the minimum miscible pressure of carbon dioxide
  • A multi-mode device for measuring the minimum miscible pressure of carbon dioxide

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Embodiment 1

[0039] The natural gas-containing crude oil used in this example has a viscosity of 9.8mPa·s at a temperature of 45°C, the fracture pressure of the reservoir is 27.9MPa, and the number of permeability between a certain injection-production well of the reservoir is 5, respectively K 3 : 2000×10 -3 μm 2 , K 4 : 1800×10 -3 μm 2 , K 5 : 1500×10 -3 μm 2 , K 6 : 1000×10 -3 μm 2 , K 7 : 800×10 -3 μm 2 ;

[0040] The thin tube miscible monitor, narrow tube pressure monitor, rock core mixed phase monitor and rock core pressure monitor are gas chromatographs of the model GC9310 produced by Shanghai Precision Company; adding reagent flow totalizer, carbon dioxide flow totalizer The instruments are all XSFT-LCD Chinese flow totalizers produced by Xisen Company; the constant pressure and constant speed pumps used are all HSB-1 high pressure constant speed and constant pressure pumps produced by Haian Petroleum Research Instrument Co., Ltd.

[0041] 1. Test the minimum miscib...

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Abstract

The invention discloses a device for measuring carbon dioxide minimum miscible pressure in multiple modes, and solves the problem that testing of minimum miscible pressure with an existing instrument is performed under a homogeneous condition. The device includes a minimum miscible pressure test module which achieves a mixed phase, a miscible pressure test module in a fine tube and miscible pressure test modules in natural cores of different permeability, thus minimum miscible pressure under different pore throat conditions can be tested by measurement of gradual contact to achieve the mixed phase under different pore throat conditions, and according to plane heterogeneity between an injection well and an extraction well of a real reservoir stratum, the minimum miscible pressure under pore throats of the natural cores of different permeability of the reservoir stratum is further tested. The device not only can test minimum miscible pressure of carbon dioxide and crude oil under a heterogeneous condition, thereby obtaining the minimum miscible pressure of the real reservoir stratum, but can also master a fact that whether the same carbon dioxide and crude oil can realize a mixed phase in areas of different permeability.

Description

technical field [0001] The invention relates to the technical field of carbon dioxide flooding enhanced oil recovery, in particular to a device for measuring carbon dioxide miscible pressure. Background technique [0002] Carbon dioxide flooding is one of the most potential methods of enhancing oil recovery in tertiary oil recovery. Carbon dioxide flooding can be divided into miscible flooding and immiscible flooding, and the displacement effect of miscible flooding is better than that of immiscible flooding. The ideal condition of carbon dioxide flooding in a mine is that the proportion of miscible flooding is as high as possible. However, how large is the area of ​​carbon dioxide miscible flooding? Currently, mine field tests have not yet given a specific test evaluation. In order to objectively evaluate the miscible flooding in the reservoir In some cases, it is necessary to carry out relevant carbon dioxide indoor experiments. [0003] At present, the indoor experimenta...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L11/00G01N33/28
Inventor 皮彦夫刘丽刘英杰孙宁李琳琳周志军
Owner NORTHEAST GASOLINEEUM UNIV
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