Laser raman Mapping-based method for determining vapor liquid ratio of fluid inclusion

A fluid inclusion and laser technology, applied in Raman scattering, material excitation analysis, etc., can solve problems such as the inability to accurately obtain the gas-liquid ratio, and achieve the effect of easy operation and high analysis accuracy

Inactive Publication Date: 2014-07-23
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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  • Laser raman Mapping-based method for determining vapor liquid ratio of fluid inclusion
  • Laser raman Mapping-based method for determining vapor liquid ratio of fluid inclusion

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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 laser raman Mapping-based method for determining a vapor liquid ratio of a fluid inclusion. Component test and analysis of a three-dimensional space are achieved by an automatic sample stage (three directions of X, Y and Z axes) of laser raman. T method comprises the following steps: firstly, obtaining distribution of gas-phase and liquid-phase component spectrums of the fluid inclusion in a plurality of two-dimensional planes through Mapping test and analysis of an X-Y axis and an X-Z axis respectively; obtaining length, width and height three-dimensional measurement parameters of the inclusion by gas-phase and liquid-phase distribution of the built three-dimensional space on the basis; and obtaining accurate volume ratio, namely the vapor liquid ratio, of the gas part and the liquid part when the single fluid inclusion is at a certain temperature (room temperature usually) by further utilizing the spheroid volume calculation formula. The method can be applied to hydrocarbon inclusions, and also can be applied to saline inclusions, and new technological means is provided for researches such as paleofluid temperature and pressure calculation and the like.

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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