Method and apparatus for predicting soil light hydrocarbon index
A soil and index technology, applied in the field of oil and gas exploration, can solve the problems of light hydrocarbon index distortion, time-consuming and labor-intensive, etc., and achieve the effect of improving efficiency
Active Publication Date: 2015-11-25
PETROCHINA CO LTD
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[0004] However, for the large-scale measurement of oil and gas exploration, these two methods are particularly time-consuming and labor-intensive, and the preservation and pretreatment of soil samples will distort the light hydrocarbon indicators in the soil
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[0067] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0068] The working principle of this technical solution is: visible light-near-infrared spectrum detection technology is developing rapidly. For example, the FieldSpec series portable visible light-near-infrared spectrometer of American ASD company has a spectral resolution as high as 1nm, which can detect subtle differences in substances. In recent years, with the in-depth research on visible light-near-infrared spectral detection technology, it has the abilit...
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The invention relates to a method and an apparatus for predicting a soil light hydrocarbon index. The method comprises: collecting a soil sample from a target area, wherein the same soil sample is divided into two parts, a first soil sample is used for measurement of soil light hydrocarbon content, and a second soil sample is used for spectral measurement; carrying out measurement of the soil light hydrocarbon content on the first soil sample so as to obtain a soil light hydrocarbon contrast value; carrying out spectral measurement on the second soil sample so as to obtain spectral indexes, wherein the spectral indexes include reflectivity, a reflectivity first-order derivative, a reflectivity second-order derivative and a reflectance absorption depth; determining related coefficients by utilizing the soil light hydrocarbon contrast value and the spectral indexes; determining spectral indexes required for modeling according to the related coefficients; establishing a regression model by using the soil light hydrocarbon contrast index as a dependent variable and using the spectral indexes required for modeling as independent variables; and predicting the soil light hydrocarbon index of the target area by utilizing the regression model.
Description
technical field [0001] The invention relates to the technical field of oil and gas exploration, in particular to a method and device for predicting soil light hydrocarbon indicators. Background technique [0002] According to the hydrocarbon micro-leakage theory and vertical migration theory, it is a commonly used non-seismic oil and gas exploration method to search for hydrocarbon resources through the anomalies of light hydrocarbon indicators in onshore sediments. Among them, light hydrocarbon indicators include: methane (C 1 ), ethane (C 2 ), ethylene (C 2- ), propane (C 3 ), propylene (C 3- ), butane (iC 4 ), n-butane (nC 4 ), isopentane (iC 5 ), n-pentane (nC 5 ) total hydrocarbon content and heavy hydrocarbon content. [0003] The measurement of soil light hydrocarbon index is mainly to measure the hydrocarbon components of free hydrocarbons between soil particles and adsorbed hydrocarbons between soil mineral lattices. At present, the commonly used detection...
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IPC IPC(8): G06F17/50
Inventor 邢学文于世勇刘松申晋利谢兴
Owner PETROCHINA CO LTD