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Method for determining vapor-liquid ratio of fluid inclusion based on laser Raman Mapping

A fluid inclusion and inclusion technology, applied in Raman scattering, material excitation analysis, etc., can solve the problem that the gas-liquid ratio cannot be accurately calculated, and achieve the effect of easy operation and high analysis accuracy

Inactive Publication Date: 2014-02-19
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The purpose of the present invention is to provide an effective and operable method for obtaining the precise gas-liquid ratio of fluid inclusions based on laser Raman Mapping technology, which improves the effectiveness of reservoir paleo-temperature-pressure simulation analysis and solves the problem of The problem that the gas-liquid ratio of non-fluorescent fluid inclusions (such as brine inclusions) cannot be calculated accurately

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  • Method for determining vapor-liquid ratio of fluid inclusion based on laser Raman Mapping
  • Method for determining vapor-liquid ratio of fluid inclusion based on laser Raman Mapping

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Embodiment Construction

[0017] Taking a geological sample as an example below, the specific implementation method of the present invention will be further described in detail in conjunction with the accompanying drawings. The laser Raman spectrometer model used in this experiment is LabRAM Aramis (manufactured by HORIBA JobinYvon, France). Specific steps are as follows:

[0018] Step 1: Sample Preparation

[0019] The rock samples were sliced, polished thin slices on both sides, with a thickness of 0.1-0.3 mm, and conventional fluid inclusion thin slices were obtained.

[0020] Step 2: Observing fluid inclusions under a microscope

[0021] Observation and analysis of fluid inclusions under a microscope, including size, type, appearance, fluorescence characteristics, etc.

[0022] Step 3: Perform standard sample calibration on the instrument

[0023] First you need to use a silicon wafer (520.7cm -1 ) standard sample to calibrate the Raman spectrometer. When the standard sample is calibrated, sel...

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Abstract

The invention relates to a method for determining the vapor-liquid ratio of a fluid inclusion based on laser Raman Mapping. Three-dimensional component test analysis is realized through a laser Raman automatic sample bench (three directions comprising X-axis, Y-axis and Z-axis). The method comprises the following steps: obtaining the distribution of the vapor phase and liquid phase components of the fluid inclusion on a plurality of two-dimensional planes through the Mapping test analysis of the X-Y axis and the X-Z axis; obtaining three-dimensional metric parameters comprising the length, width and height of the inclusion according to the above constructed three-dimensional vapor phase and liquid phase component distribution; and utilizing an ellipsoid volume calculating formula to obtain the accurate volume ratio of the vapor part to the liquid part (the vapor-liquid ratio) of single fluid inclusion at a temperature (usually room temperature). The method is suitable for hydrocarbon inclusions, is also suitable for brine inclusions, and provides a new technological means for researching the temperature and pressure calculation of paleo-fluids.

Description

technical field [0001] The invention relates to the technical field of petroleum geological exploration and development, in particular to a method for measuring the gas-liquid ratio of fluid inclusions by using laser Raman Mapping technology. Background technique: [0002] Fluid inclusions are the original geological fluids that are captured and preserved in mineral crystal defects during the crystal growth process of minerals. They are microscopic paleofluid samples that record diagenesis, ore formation (reservoir) and their conditions. The analysis and research of fluid inclusions can reveal the physical and chemical conditions, fluid composition, material source and geological process of diagenesis and mineralization (reservoir) in different periods. According to different composition properties, fluid inclusions are divided into hydrocarbon inclusions, hydrocarbon-containing brine inclusions and non-fluorescent brine inclusions. The gas-liquid ratio refers to the volume...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
Inventor 刘嘉庆李忠
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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