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Device and method for oil well hydrogen sulfide well bottom treatment

A hydrogen sulfide and oil well technology, which is used in wellbore/well components, earthmoving, wellbore flushing, etc., can solve the problems of complex hydrogen sulfide treatment process, long residence time, incomplete treatment, etc., and achieve extensive field promotion and Application prospect, low processing cost, and solving the effect of poor processing effect

Pending Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to propose a device and method for treating hydrogen sulfide at the bottom of an oil well in view of the deficiencies in existing oil well hydrogen sulfide treatment methods
It solves the problems of complex hydrogen sulfide treatment process, huge equipment, long residence time, incomplete treatment and high cost

Method used

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  • Device and method for oil well hydrogen sulfide well bottom treatment
  • Device and method for oil well hydrogen sulfide well bottom treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0061] Well A in Shengli Oilfield, the well depth is 800m, the oil layer thickness is 8m, the liquid volume is 20 m³ / day, the oil volume is 4 tons / day, and the hydrogen sulfide content is 5000mg / m 3 , the bottom hole treatment device is used for hydrogen sulfide treatment, the outlet pressure of the air compressor is 10MPa, and the flow rate of the air mass flow controller is 1.0Nm 3 / h, the material of the capillary is stainless steel 312L, the inner diameter is 3mm, and the wall thickness is 1mm. The outer cylinder and inner cylinder of the active reaction unit have a cylindrical hole diameter of 3mm and a hole spacing of 2mm. The cylinder height of the outer cylinder and the inner cylinder is 1m higher than the oil layer. The air release device is a ring structure, its inner diameter is the same as that of the inner cylinder, and its outer diameter is the same as that of the outer cylinder. The distance between the air releasers is 10 cm, and the annular structure of the ...

Embodiment 2

[0063] Well B in Shengli Oilfield, the well depth is 1000m, the oil layer thickness is 9m, the liquid volume is 26 cubic meters per day, the oil volume is 3.5 tons per day, and the hydrogen sulfide content is 10000mg / m3 3 , the bottom hole treatment device is used for hydrogen sulfide treatment, the outlet pressure of the air compressor is 15MPa, and the flow rate of the air mass flow controller is 3Nm 3 / h, the capillary is made of stainless steel 312L, with an inner diameter of 3.5mm and a wall thickness of 1.1mm. The diameter of the outer cylinder and the inner cylinder of the active reaction unit is 3.5mm, and the hole spacing is 2.5mm. The cylinder height of the outer cylinder and the inner cylinder is 1.5m higher than the oil layer. The air release device is a ring structure, its inner diameter is the same as that of the inner cylinder, and its outer diameter is the same as that of the outer cylinder. The distance between the air releasers is 15 cm, and the annular str...

Embodiment 3

[0065] Well C in Shengli Oilfield, the well depth is 1500m, the oil layer thickness is 10m, the liquid volume is 30 m3 / day, the oil volume is 4.5 tons / day, and the hydrogen sulfide content is 15000mg / m 3 , the bottom hole treatment device is used for hydrogen sulfide treatment, the outlet pressure of the air compressor is 20MPa, and the flow rate of the air mass flow controller is 5Nm 3 / h, the material of the capillary is stainless steel 312L, the inner diameter is 4mm, and the wall thickness is 1.3mm. The outer cylinder and inner cylinder of the active reaction unit have a cylindrical hole diameter of 4mm and a hole spacing of 3mm. The cylinder height of the outer cylinder and the inner cylinder is 2.0m higher than the oil layer. The air release device is a ring structure, its inner diameter is the same as that of the inner cylinder, and its outer diameter is the same as that of the outer cylinder. The distance between the air releasers is 20 cm, and the annular structure ...

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Abstract

The invention belongs to the technical field of oil field safety production and environmental protection, and particularly relates to an oil well hydrogen sulfide well bottom treatment device and method. The device comprises an air injection allocation unit, an active reaction unit and a detection control unit, the air injection allocation unit is connected with the active reaction unit through a capillary tube and provides air for the active reaction unit; the detection control unit detects the content of hydrogen sulfide in the oil pipe sampling opening and controls the air supply amount of the air injection allocation unit according to the detected content of hydrogen sulfide. A hydrogen sulfide treatment node is arranged at the bottom of the well, so that source treatment is realized, and the occupied area of equipment is reduced; cheap air is used as a desulfurization medium, a catalyst is used as an auxiliary agent, the desulfurization rate is high, the treatment cost is low, and no pollution is caused. Meanwhile, the device has the advantages of being high in automation degree, safe, reliable and easy and convenient to operate, manage and maintain, and therefore the device has wide field popularization and application prospects.

Description

technical field [0001] The invention belongs to the technical field of oil field safety production and environmental protection, and in particular relates to a device and method for treating hydrogen sulfide at the bottom of an oil well. Background technique [0002] With the development of heavy oil thermal recovery and water injection, a large number of oil wells with high hydrogen sulfide content have appeared in Shengli Oilfield. According to statistics, there are more than 1,500 oil wells with hydrogen sulfide content exceeding the safety critical concentration, and the hydrogen sulfide content of individual oil wells is as high as 50,000mg / m 3 , hydrogen sulfide is not only a highly toxic gas that poses a serious threat to the health of production operators, but also a highly corrosive gas that can easily cause serious corrosion to wellbore equipment and cause major safety accidents, so it is urgently needed deal with. [0003] According to the principle of source con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/38E21B43/22E21B37/06E21B21/00
CPCE21B43/38E21B43/16E21B37/06E21B21/00
Inventor 袁长忠王冠张守献岳胜辉于丹丹冯逸茹潘永强徐鹏徐闯曹功泽
Owner CHINA PETROLEUM & CHEM CORP