Mud Logging Oil and Gas Interpretation and Discrimination Method Based on Thermal Evaporation Hydrocarbon Gas Chromatogram Comparison

Abstract

The invention relates to a logging oil and gas interpretation discrimination method based on thermal evaporation hydrocarbon gas chromatography spectra comparison. The method comprises the following steps: establishing a thermal evaporation hydrocarbon gas chromatography standard map database at each preset layer of a completed well of a drilling area; extracting characteristic map data of a layerto be interpreted of an uncompleted well of the drilling area; and respectively calculating a similarity distance between the characteristic map data of the layer to be interpreted and each group ofthermal evaporation hydrocarbon gas chromatography standard map data with the same layer in the thermal evaporation hydrocarbon gas chromatography standard map database, wherein oil quality information and test conclusion information included in the thermal evaporation hydrocarbon gas chromatography standard map data with the smallest similarity distance in the corresponding layer in the thermal evaporation hydrocarbon gas chromatography standard map database serve as an oil quality conclusion and a fluid type conclusion of the corresponding layer to be interpreted. The logging oil and gas interpretation discrimination method based on the thermal evaporation hydrocarbon gas chromatography spectra comparison provided by the invention can improve the interpretation coincidence rate of a logging oil and gas water layer, and realize rapid identification of well sites and quantitative evaluation of oil and gas water layers.

Description

technical field [0001] The invention relates to the technical field of mineral exploitation such as petroleum and natural gas, in particular to a mud logging oil and gas interpretation and discrimination method based on comparison of thermally evaporated hydrocarbon gas chromatograms. Background technique [0002] With the development of mud logging technology, especially in recent years, technologies such as rock pyrolysis analysis, thermal evaporation hydrocarbon gas chromatography analysis, light hydrocarbon component analysis and three-dimensional quantitative fluorescence mud logging have been updated and improved. A complete set of mature technical theories has been formed, which has reached a higher level from well site sample collection, analysis and processing to interpretation and evaluation, providing a new reference basis and interpretation means for well site geological logging reservoir evaluation. So far, through the application research of individual mud logg...

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Problems solved by technology

So far, through the application research of individual mud logging technologies, problems such as the identification of true and false oil and gas shows, the discovery of weak oil and gas shows, the judgment of oil and gas water layers, the division of oil-water contact, the judgment of oiliness and crude oil properties, etc. can basically be solved. and the field of development have played a certain role, but different single technologies have limitations and multi-solutions, and ambiguous situations will appear in practical applications, which cannot meet the requirements of fine evaluation

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