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Retrieve method for natural gas vented by margin oil wells

A technology for venting natural gas and recovery method, applied in the fields of energy and environmental protection, can solve the problems of high cost, waste of resources, difficult maintenance, etc., and achieve the effect of good economy and applicability

Inactive Publication Date: 2013-10-23
四川科比科油气工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are also methods for recovering natural gas resources vented by scattered oil and gas wells in remote areas. For example, the current solution is to install a natural gas liquefaction device next to each marginal well for recycling. Although this solution can recover natural gas, it requires each marginal well. Installing one next to the well is costly and difficult to maintain, and if the natural gas in the edge well is exhausted, the natural gas liquefaction device needs to be dismantled, resulting in a waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The gas venting conditions of the existing 5 marginal wells are shown in Table 1, and the 5 wells are all within 200 kilometers.

[0019] Table 1

[0020] Wellhead number Natural gas production (Nm 3 / d) Wellhead gas holder size (Nm 3 ) Gas storage period (days) A 500 5000 10 B 1000 5000 5 C 1500 7500 5 D 2000 10000 5 E 2500 10000 4

[0021] Select 1000Nm according to the conditions in Table 1 3 / h-scale vehicle-mounted flow processing device, firstly treat the 5000Nm in the gas storage tank at the A well point 3 For natural gas, it takes 5-6 hours, and the other four wells are in the process of gas storage. After the treatment at well point A is completed, the product is shipped out for sale with a CNG transport vehicle, and the mobile processing device is driven to point B, where 5000Nm is processed 3 Natural gas, it takes 5-6 hours; then go to C well po...

Embodiment 2

[0024] The gas venting conditions of the existing 8 marginal wells are shown in Table 2, and the 8 wells are all within 200 kilometers.

[0025] Table 2

[0026] Wellhead number Natural gas production (Nm 3 / d) Wellhead gas holder size (Nm 3 ) Gas storage period (days) A 200 4000 20 B 400 4000 10 C 800 8000 10 D 1000 8000 8 E 1500 7500 5 F 2000 10000 5 G 3000 15000 5 H 4000 20000 5

[0027] Select 1500Nm according to the conditions in Table 1 3 / h-scale vehicle-mounted flow processing device, firstly treat the 4000Nm in the gas storage tank at the A well point 3 Natural gas, it takes 2-3 hours, and the other 7 wells are in the process of gas storage. After the treatment at well point A is completed, the product is shipped out for sale with a CNG transport vehicle, and the mobile processing device is driven to point B, where 4000Nm is processed...

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Abstract

The invention discloses a retrieve method for natural gas vented by margin oil wells. According to the method, a gas holder is disposed near each of the margin oil wells to collect natural gas vented by each of the wells, and by utilization of a vehicular mobile processing device, the natural gas in the gas holders is retrieved in a mobile manner among a plurality of the wells. The atmospheric-pressure gas holders in the invention can directly adopt gas holders sold in the market and can also adopt pressurized gas holders. The method stores all the natural gas vented by the small-reserve margin oil wells for unified treatment. The method has good economic efficiency and applicability, and deserves popularization.

Description

technical field [0001] The invention relates to a method for recovering natural gas, in particular to a method for recovering natural gas vented in marginal wells, and belongs to the technical fields of energy and environmental protection. Background technique [0002] Due to the low gas production of marginal wells, the recovery cost is high. For example, the gas production of many marginal wells is less than 10,000 cubic meters per day. Therefore, the natural gas in many marginal wells has to be released in vain, which is a pity. At present, there are also methods for recovering natural gas resources vented by scattered oil and gas wells in remote areas. For example, the current solution is to install a natural gas liquefaction device next to each marginal well for recycling. Although this solution can recover natural gas, it requires each marginal well. Installing one next to the well is costly and difficult to maintain, and if the natural gas in the marginal well is exh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/10
Inventor 李才军陈天洪朱江陈斯
Owner 四川科比科油气工程有限公司
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