Application of halohydrin as water injection chemical tracer in oil field

A halohydrin and tracer technology is applied in the application field of halohydrin as a chemical tracer for water injection in oil fields, which can solve the problem that the tracer is difficult to meet the requirements of oilfield exploitation, and achieves low detection limit, Lower production cost and better stability

Inactive Publication Date: 2017-05-17
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides the application of a kind of halohydrin as water flooding chemical tracer in oil field, overcomes above-mentioned deficiencies in the prior art, and it can effectively solve the problem that traditional tracer has been difficult to meet the requirements of oilfield exploitation, and the related halohydrin As a chemical tracer for water injection in oil fields, there are no reported problems at home and abroad

Method used

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  • Application of halohydrin as water injection chemical tracer in oil field
  • Application of halohydrin as water injection chemical tracer in oil field
  • Application of halohydrin as water injection chemical tracer in oil field

Examples

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Effect test

Embodiment 1

[0020] Example 1, the application of the halohydrin as a water injection chemical tracer in oilfields.

Embodiment 2

[0021] Example 2, as an optimization of the above example, the halogenated alcohol is 4-chlorobenzyl alcohol or 2,3,5,6-tetrafluorobenzyl alcohol or 2-bromoethanol. When 2-bromoethanol and 4-chlorobenzyl alcohol are used together, the mass ratio of 2-bromoethanol to 4-chlorobenzyl alcohol is 6 to 8:9 to 11. 2-bromoethanol and 2,3,5,6-tetra When fluorobenzyl alcohol is used in combination, the mass ratio of 2-bromoethanol to 2,3,5,6-tetrafluorobenzyl alcohol is 80 to 92:95 to 105.

[0022] The application of the halohydrin as a water injection chemical tracer in the oil field was detected by the following experiments:

[0023] 1. This halogenated alcohol is used as the gas chromatography detection method condition of water injection chemical tracer, and instrument used is gas chromatograph ECD detector. Among them, chromatographic column: DB-5 or similar type of chromatographic column; split ratio: 1:10; carrier gas: nitrogen; detector temperature: 300°C; flow rate 1.5ml / min; ...

Embodiment 3

[0035] Example 3: Tracer monitoring was carried out in Area A of Tarim Oilfield. After years of exploitation, it has entered the stage of high water cut. The distribution of oil and water in the formation is very complicated. The thickness of sandstone is 7.2m, and the effective thickness is 6.4m. It is composed of two positive rhythm oil layers. The water-washed section of the core showed two stages of water flooding; the daily oil production was 17t in the early stage of production, and the permeability decreased, generally 500×10 -3 μm 2 up to 2000×10 -3 μm 2 , 2-bromoethanol was used as a non-distributing tracer, and the traditional tracer n-butanol was used as a distributing tracer. The two tracers were used together for logging to monitor inter-well connectivity, swept area and residual oil parameters such as saturation.

[0036] 100Kg of 2-bromoethanol and 1.7t of n-butanol were made into aqueous solutions and put into the downhole from the production well. Through m...

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Abstract

The invention relates to the technical field of tracers and provides an application of halohydrin as a water injection chemical tracer in an oil field. The application of halohydrin as the water injection chemical tracer in the oil field is disclosed for the first time. 4-chlorobenzyl alcohol, 2,3,5,6-tetrafluorobenzyl alcohol and 2-bromoethanol have the characteristics of high sensitivity, low detection limit and good stability, 2-bromoethanol can cooperate with either of 4-chlorobenzyl alcohol and 2,3,5,6-tetrafluorobenzyl alcohol for use, not only can oil reservoir distribution and oil layer motion condition be monitored, but also downhole residual oil saturation can be determined; meanwhile, compared with traditional alcohol tracers, 4-chlorobenzyl alcohol, 2,3,5,6-tetrafluorobenzyl alcohol and 2-bromoethanol are resistant to bacterial and microbial erosion and are low in input and interference, greatly reduce the input and production cost and can be well applied as the water injection chemical tracer to tracing detection in the oil field.

Description

technical field [0001] The invention relates to the technical field of tracers, and relates to the application of a halohydrin as a water injection chemical tracer in oil fields. Background technique [0002] In recent years, with the rapid development of tertiary oil recovery and even quaternary oil recovery, in order to understand the geological structure of oil reservoirs and improve oil recovery, adding tracers in the oil recovery process has become an indispensable means. Tracer technology is a technology that selects the appropriate substance to add to the fluid that needs to be traced, and analyzes the law of the fluid movement state by monitoring the concentration change of the tracer produced. The method of water injection to extract crude oil has become the main production method of major oil fields at home and abroad. The water injection chemical tracer has the characteristics of high sensitivity, low background concentration, good stability, and good compatibilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N11/00G01N30/02
CPCG01N11/00G01N30/02G01N2011/006
Inventor 王强班涛商安东田洛阳高晶
Owner XINJIANG UNIVERSITY
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