Method for identifying three-dimensional quantitative fluorescence characteristic peak and judging fluid type

Abstract

The invention discloses a method for identifying a three-dimensional quantitative fluorescence characteristic peak and judging the fluid type. The method comprises the following steps: step 1, acquiring data of a three-dimensional quantitative fluorescence spectrum and the contrast level N; step 2, identifying the characteristic peak, marking as F1, F2, ..., Fm, wherein m is the number of the characteristic peaks and the characteristic peak Fj comprises an excitation wavelength Emj and an emission wavelength Exj, j=1,2, ..., m; step 3, calculating the number a of the characteristic peaks meeting the requirement that Emj-Exj>30 and the number b of the characteristic peaks failing to meet the requirement that Emj-Exj>30 in the characteristic peak Fj; step 4, when a>0, b=0 and N>6, the fluid is an oil layer; when a=0, b>0 and N<6, the fluid is a water layer; when a>0, b>0 and N>6, the fluid is an oil-containing water layer. The provided method for identifying the three-dimensional quantitative fluorescence characteristic peak and judging the fluid type can greatly increase the judgement accuracy of the fluid type, is excellent in universality, and is suitable for popularization.

Description

technical field [0001] The invention belongs to the technical field of mud logging engineering in the petroleum exploration industry, and in particular relates to a three-dimensional quantitative fluorescent characteristic peak identification and fluid type judgment method. Background technique [0002] Petroleum quantitative fluorescence logging technology is one of the important technologies in the field logging process, and it is an important means for the identification and evaluation of oil and gas layers under the rapid and special drilling technology. Quantitative fluorescence logging has the characteristics of wide range of sample fluorescence detection, high sensitivity, automatic computer reading, and can exclude mineral luminescence, etc., thus overcoming the inability to detect condensate oil-light oil and the difficulty of distinguishing mineral luminescence under ordinary fluorescent light. In order to solve the difficulties, a new mud logging method has been a...

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Problems solved by technology

[0005] The present invention designs and develops a three-dimensional quantitative fluorescence characteristic peak identification and fluid type judgment method, with the purpose of overcoming the defect of poor fluid type judgment accuracy in the prior art

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