Method for recognizing reservoir fluid property by adopting three-dimensional quantitative fluorescent longitudinal parametric variation trend

Abstract

The invention discloses a method for recognizing reservoir fluid properties by adopting a three-dimensional quantitative fluorescent longitudinal parametric variation trend. The method comprises the following steps: comparing and analyzing oiliness concentration and contrast level data in collected three-dimensional quantitative fluorogram data and a corresponding oil testing conclusion and a well logging interpretation result and establishing the interpretation standards of judging the reservoir fluid properties; collecting and analyzing specimens to be recognized to obtain the three-dimensional quantitative fluorogram data of the specimens to be recognized; determining the reservoir fluid properties by contrasting the oiliness concentration and the comparison level in the three-dimensional quantitative fluorogram data of the specimens to be recognized with the interpretation standards on the basis of the variation trend of well depths. According to the invention, when the method is applied in the Bohai oilfield, the interpretation coincidence rate can reach 89.5%, and the level and the coincidence rate of the comprehensive interpretation fluid properties in well logging fields can be greatly improved; the method is simple, practical, easy to operate and timely and accurate in judgment, and has a very good application and popularization prospect.

Description

technical field [0001] The invention relates to the technical field of geological logging interpretation and evaluation for petroleum exploration, in particular to a method for identifying reservoir fluid properties by using three-dimensional quantitative fluorescence parameters. Background technique [0002] The so-called fluorescence means that under the irradiation of ultraviolet rays, the fluorescent molecules in crude oil will absorb some energy, temporarily making the fluorescent molecules reach a high-energy and unstable state, and when these fluorescent molecules return to the original state from the unstable state, they will be in the form of The excess energy is released in the form of light waves, a property of oil called fluorescence. Three-dimensional quantitative fluorescence logging technology is to irradiate samples (including any one or more of rock core, wall core, and cuttings) with ultraviolet rays of different wavelengths. After absorbing the excitation ...

AI Technical Summary

Problems solved by technology

However, the calculation of the equivalent oil content in these methods is relatively complicated and requires separate software calculations, which is not easy to operate

In addition, the remaining calculation parameters (contrast level, oiliness index, etc.) of 3D quantitative fluorescence mud logging are not fully used

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