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Integrated system and process for detecting and treating toxic gas in oil field drilled rock core

A toxic gas and core technology, applied in the field of oil and gas exploration and safety production, can solve problems such as safety accidents, injuries, pipeline corrosion, etc., and achieve the effect of ensuring life and health

Active Publication Date: 2021-04-27
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But radon and mercury haven't been a concern
Radon is a radioactive gas and is one of the 19 major carcinogens announced by the World Health Organization. The biological effects of radon are mainly concentrated in respiratory tract tumors, pulmonary fibrosis, and emphysema. It is a poisonous and harmful gas. On the one hand, it has a harmful effect on the human body. Inhaling high concentrations of mercury will cause mental-nervous abnormalities, gingivitis, and tremors as the main symptoms of chronic diseases. On the other hand, mercury will cause serious damage to the pipeline during transportation. Corrosion has caused many major safety accidents

Method used

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  • Integrated system and process for detecting and treating toxic gas in oil field drilled rock core
  • Integrated system and process for detecting and treating toxic gas in oil field drilled rock core
  • Integrated system and process for detecting and treating toxic gas in oil field drilled rock core

Examples

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Effect test

Embodiment 1

[0092] This embodiment provides a device for detecting toxic gases in cores drilled in oilfields, and its structural schematic diagram is as follows figure 1 shown, from figure 1 As can be seen, the device includes:

[0093] The display screen 1-12, the electric signal amplifier 1-11, the first electric signal processor 1-8, the second electric signal processor 1-9, the third electric signal processor 1-10 and the radon detection room which are connected in sequence 1-1, hydrogen sulfide detection room 1-2 and mercury detection room 1-3;

[0094] The radon detection chamber 1-1 is provided with an alpha detector 1-4, and the alpha detector 1-4 is electrically connected to the input end of the first electrical signal processor 1-8, and the first electrical signal processor The output end of the device 1-8 is electrically connected to the display screen 1-12 via an electric signal amplifier 1-11; the gas inlet of the radon detection chamber 1-1 is provided with a detachable fi...

Embodiment 2

[0107] This embodiment provides a device for harmless treatment of toxic gases in cores drilled in oilfields, the schematic diagram of which is shown in Fig. figure 2 shown, from figure 2 As can be seen from the figure, the device includes a radon treatment chamber 2-1 and a hydrogen sulfide rinsing and removal chamber 2-2 connected in sequence;

[0108] The radon treatment chamber 2-1 is provided with several mesh partitions 2-4, and the surface of the mesh partitions 2-4 is provided with biologically active adsorbents 2-9;

[0109] The top of the hydrogen sulfide rinse and removal chamber 2-2 is provided with a shower device 2-5, and the shower device 2-5 is used for spraying sulfuration in the hydrogen sulfide rinse and removal chamber 2-1 from top to bottom. Hydrogen scavengers 2-10.

[0110] In the device provided in this embodiment, the partition is a corrosion-resistant quartz thin plate.

[0111] In the device provided in this embodiment, the biologically active a...

Embodiment 3

[0115] This embodiment provides a device for harmless treatment of toxic gases in cores drilled in oilfields, the schematic diagram of which is shown in Fig. image 3 shown, from image 3 As can be seen from the figure, the device includes a radon treatment chamber 2-1 and a mercury treatment chamber 2-3 which are connected in sequence;

[0116] The radon treatment chamber 2-1 is provided with several mesh partitions 2-4, and the surface of the mesh partitions 2-4 is provided with biologically active adsorbents 2-9;

[0117] The mercury treatment chamber 2-3 is provided with several harmful gas treatment nets 2-6, and the harmful gas treatment nets 2-6 are filled with melamine-modified bentonite.

[0118] In the device provided in this embodiment, the partition is a corrosion-resistant quartz thin plate.

[0119] In the device provided in this embodiment, the biologically active adsorbent is biologically activated carbon.

[0120] In the device provided in this embodiment, ...

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Abstract

The invention provides an integrated system and process for detecting and treating toxic gas in a drilled core of an oil field. The process comprises steps of carrying out wax sealing of the core taken out from a shaft, placing the wax-sealed core in a vacuum container, and collecting the gas escaping from the core through a vacuum gas collection tank; sequentially carrying out radon, hydrogen sulfide and mercury detection on the gas in the rock core; if it is found that the concentrations of mercury, radon and hydrogen sulfide in the gas all reach the standard after detection, the gas being conveyed to a gas conveying pipeline; if it is found that the concentration of radon and hydrogen sulfide or mercury in the gas does not reach the standard after detection, harmless treatment being conducted on the radon and hydrogen sulfide or mercury which do not reach the standard in the gas; mercury, radon and hydrogen sulfide detection being sequentially carried out on the gas subjected to harmless treatment, and if the concentrations of mercury, radon and hydrogen sulfide in the gas all reach the standard, the gas subjected to harmless treatment being conveyed to a gas conveying pipeline; and if the concentration of radon and hydrogen sulfide or mercury in the gas does not reach the standard, continuously performing harmless treatment on the radon and hydrogen sulfide or mercury which do not reach the standard in the gas till the concentration reaches the standard.

Description

technical field [0001] The invention relates to an integrated system and process for detecting and treating toxic gas in drilling cores in oil fields, and belongs to the technical field of oil and gas exploration and safe production. Background technique [0002] In the process of oilfield exploration and development, first-hand underground information needs to be obtained, and core drilling is an important means. However, the core is buried deep in the ground and is full of various toxic and harmful gases. During the preservation process, the toxic and harmful gases gradually escape, which will cause potential harm to the surrounding environment, equipment and personnel. For example, hydrogen sulfide, due to its abnormal smell, has attracted attention, and many natural gas with high hydrogen sulfide content have been desulfurized. But radon and mercury have not attracted much attention. Radon is a radioactive gas and is one of the 19 major carcinogens announced by the Wor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24G01N33/00G01N1/34G01N1/22B01D53/78B01D53/52B01D53/04
CPCG01N33/0011G01N33/0014G01N33/0036G01N33/0044G01N33/0045G01N33/0055G01N1/2294G01N33/24G01N1/34B01D53/04B01D53/52B01D53/78B01D2257/11B01D2257/602Y02A50/20
Inventor 陈志勇朱光有王铜山袁苗杨敏曹颖辉闫磊王珊李婷婷李宁熙
Owner PETROCHINA CO LTD
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