Method for identifying properties of reservoir fluid by three-dimensional quantitative fluorescence parameter charts

A technology for reservoir fluid properties and three-dimensional quantification, which is applied in the direction of earthwork drilling and production, wellbore/well components, etc. It can solve problems such as difficult operation, insufficient use of three-dimensional quantitative fluorescence logging, and complicated calculation of oil content

Inactive Publication Date: 2014-10-15
CHINA NAT OFFSHORE OIL CORP +1
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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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  • Method for identifying properties of reservoir fluid by three-dimensional quantitative fluorescence parameter charts
  • Method for identifying properties of reservoir fluid by three-dimensional quantitative fluorescence parameter charts
  • Method for identifying properties of reservoir fluid by three-dimensional quantitative fluorescence parameter charts

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Embodiment Construction

[0019] The present invention proposes plate identification for reservoir fluid properties based on comprehensive research on three-dimensional quantitative fluorescence data of old well test oil samples, wall cores and new drilling, based on three-dimensional quantitative fluorescence analysis parameters, such as oiliness index and contrast level parameters method. Among them, the oiliness index (Oc) refers to the ratio of the intensity value of the largest fluorescent peak representing the medium oil component to the intensity value of the largest fluorescent peak representing the light oil component; the contrast level (N) refers to the intensity value of the fluorescent substance in the unit sample. Corresponding fluorescence series contrast level.

[0020] Such as figure 2 As shown, the method for identifying reservoir fluid properties using a three-dimensional quantitative fluorescence parameter plate according to an embodiment of the present invention includes the foll...

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Abstract

The invention discloses a method for identifying properties of reservoir fluid by three-dimensional quantitative fluorescence parameter charts. The method includes the steps of based on tested sidewall core quantitative fluorescence analysis data, establishing an interpretation chart, where the properties of the reservoir fluid are identified through three-dimensional quantitative fluorescence parameters, in a two-dimensional space composed of oiliness indexes and comparison grades; collecting samples to be identified, and analyzing the samples to obtain three-dimensional quantitative fluorescence spectrogram data of the samples to be identified; projecting the oiliness indexes and the comparison grades in the obtained three-dimensional quantitative fluorescence spectrogram data to the interpretation chart, where the properties of the reservoir fluid are identified through three-dimensional quantitative fluorescence parameters; judging the properties of the reservoir fluid according to an area of projection points. After the method is applied to Bohai Oilfield, interpretation coincidence rate reaches 89.5%, and the level and coincidence rate of comprehensive interpretation for fluid properties on a logging site are greatly increased. The method is simple and practical, is easy to operate, allows timely judgment, and has great application and popularization prospects.

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 a three-dimensional quantitative fluorescence parameter plate. 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 exci...

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Application Information

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IPC IPC(8): E21B49/00
Inventor 尚锁贵胡云谭忠健罗鹏李战奎刘坤桑月浦邓强
Owner CHINA NAT OFFSHORE OIL CORP
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