Synthesis method and application of "befc tracer"

Abstract

The invention relates to a synthetic method and application of a BEFC tracer. Rare-earth element tracing method is one of effective measures to detect oil reservoirs in oilfields. A NaBiF4:Eu3+@C4H4Na2O6 fluorescent nano material with core-shell structure is synthesized herein and may act as an oilfield tracer, named as BEFC tracer. The tracer herein has the advantages of good water solubility, low usage, low water sample demand, good analytical simplicity, high analytical sensitivity, zero radiation, low toxicity, every low environmental impact, zero impact on mineralization degree, good compatibility with polymers, and zero impact on polymer flooding. The application of the BEFC tracer as one fluorescent nano material in the field of oilfield detection is innovatively achieved herein; afeasible operating scheme is provided as well.

Description

technical field

[0001] The invention relates to a europium ion-doped bismuth sodium fluoride@sodium tartrate nanomaterial with a core-shell structure, which is especially suitable as an oil field interwell tracer. It has good fluorescence and can detect oil reservoirs and test the distribution and movement of oil reservoir fluids . Background technique

[0002] In the water injection development of complex fault-block oilfields, due to the heterogeneity of the oil layer itself, high permeability zones or large pores will gradually form between oil and water wells, the efficiency of water flooding will decrease, the water cut of oil wells will rise sharply, and the development effect will obviously deteriorate. The tracer can qualitatively judge the existence of high permeability zones or large pores, and the interwell tracer is an important means to detect the distribution and movement of reservoir fluids and the heterogeneity of reservoirs. There are following problems in ...

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