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High base and high salinity resistance trace element tracer used for oil field, preparation method and application method thereof

A trace element, high alkali-resistant technology, applied in the preparation of sulfonic acid, earthwork drilling, wellbore/well components, etc., can solve problems such as insufficient water solubility, save purification links, reduce costs, and eliminate wellhead injection link effect

Inactive Publication Date: 2015-03-11
SHAANXI YANCHANG PETROLEUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A new trace element tracer obtained by complexing bipyridine derivatives with rare earth elements, which has the problem of insufficient water solubility

Method used

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  • High base and high salinity resistance trace element tracer used for oil field, preparation method and application method thereof
  • High base and high salinity resistance trace element tracer used for oil field, preparation method and application method thereof
  • High base and high salinity resistance trace element tracer used for oil field, preparation method and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 3 moles of sodium sulfosalicylate were dissolved in water to make an aqueous solution; another 1 mole of lanthanum nitrate was dissolved in water to make an aqueous solution; then the aqueous solution of lanthanum nitrate was slowly added to the aqueous sodium sulfosalicylate solution, stirred for The high-alkali and high-salinity trace element tracer (La) for oilfields with the following structural formula can be obtained within hours.

[0033]

[0034]

Embodiment 2

[0036] 3 moles of sodium sulfosalicylate were dissolved in water to make an aqueous solution; another 1 mole of cerium nitrate was dissolved in water to make an aqueous solution; then the cerium nitrate aqueous solution was slowly added to the sodium sulfosalicylate aqueous solution, stirred for 1 A high alkali and high salinity trace element tracer (Ce) for oil fields with the following structural formula can be obtained within hours.

[0037]

Embodiment 3

[0039] 1. Compatibility test

[0040] Compatibility experiments close to the oilfield salinity limit were carried out on the trace element tracer (La) with high alkali resistance and high salinity for oil field and the trace element tracer (Ce) with high alkali resistance and high salinity for oil field respectively. Specifically, they are respectively prepared into aqueous solutions with a concentration of 100 mg / L, put into an aqueous solution with a salinity of about 50,000 mg / L, and stand at 100° C. overnight.

[0041] As a result, it was found that the solutions after standing had no obvious turbidity or precipitation, indicating that their compatibility was good.

[0042] 2. Indoor displacement test

[0043] 1) Indoor displacement experiments were carried out on the high alkali and high salinity trace element tracer (La) for oilfield and the high alkali and high salinity trace element tracer (Ce) for oilfield respectively. Concretely, they are prepared into one liter o...

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Abstract

The invention relates to a high base and high salinity resistance trace element tracer used for oil field, which relates to an organic complex containing rare earth element. A structural formula of the high base and high salinity resistance trace element tracer is shown as the follows. M is selected from one or more of 17 kinds of rare earth elements. The high base and high salinity resistance trace element tracer belongs to microscale tracer, usage amount is little, the tracer has little influence on environment, can be injected into ground layer from a water flooding station by following with injection water, so that cost is saved, the practical operation is simple, and the tracer can be used by direct addition.

Description

technical field [0001] The invention relates to an organic complex containing rare earth elements. Background technique [0002] For oilfields developed by water flooding, interwell tracer technology can provide information such as the degree of heterogeneity of oil layers, the underground distribution of injected water, and flow characteristics. It has become an important reservoir engineering method, and has achieved rapid development and widely used. It is mainly used for 1. Understanding the connection between injection wells and oil production wells; 2. Understanding the advancing direction, velocity, injection-production streamline, and sweep coefficient of injection fluid; 3. Understanding oil layer stratification, verifying the size and direction of fractures, and determining the status of fault isolation zones. 4. Determine the plane and vertical heterogeneity of the oil layer; 5. Combine the data to comprehensively determine the distribution of remaining oil satur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C303/22C07C309/60E21B49/00E21B47/11E21B49/08
Inventor 范昊坤王成达陈刚王娟周普何静郑兵吴春燕毛中源顾菁华李世强
Owner SHAANXI YANCHANG PETROLEUM GRP
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