Method for performing online Raman spectral analysis on drilling fluid

A technology of Raman spectroscopy and analysis method, which is applied in the field of online determination of the types and concentrations of various components in drilling fluids. It can solve the problems of inability to measure non-fluorescent components and affect the judgment of oil and gas layers, and achieve short analysis period and high accuracy. The effect of reliability, high measurement sensitivity and precision

Active Publication Date: 2010-09-29
SHANGHAI SHENKAI GASOLINEEUM TECH +2
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Problems solved by technology

They require staff to select different sampling points and measure the samples after processing; manual operations in the analysis process will introduce new errors, thus affecting the judgment of oil and gas layers
In addition, the on-line analysis method of drilling fluid CN100460858C "On-line spectroscopic determination method of oil and gas in drilling fluid" realizes the on-line detection

Method used

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  • Method for performing online Raman spectral analysis on drilling fluid
  • Method for performing online Raman spectral analysis on drilling fluid
  • Method for performing online Raman spectral analysis on drilling fluid

Examples

Experimental program
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Embodiment Construction

[0043] refer to figure 1 , the specific implementation steps of this application are as follows:

[0044] Step 101, modeling: adopting orthogonal signal correction partial least squares stoichiometric model modeling, and obtaining parameters including coefficient B, weight W and load P in the pre-stored model;

[0045] attached figure 2 The flow chart of the modeling is given, as follows:

[0046] Step 201, according to mud logging standards, set error requirements, and determine the measurement pattern of the components to be analyzed;

[0047] Step 202, prepare a standard sample, and make the components to be analyzed into a pure and mixed standard sample according to the site requirements. The components of the standard sample can be light hydrocarbons, volatile heavy hydrocarbons, oil and other non-hydrocarbon groups according to the site requirements. Minute;

[0048] Step 203, grouping, that is, dividing the standard sample into a model group and a test group;

[0...

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Abstract

The invention relates to a method for measuring all components of drilling fluid through online Raman spectra. The method comprises the following steps of: modeling by adopting an orthogonal signal to correct a partial least square stoichiometric model, and acquiring parameters which comprise coefficients, weights and loads and are pre-stored in the model; measuring and collecting Raman spectra of the drilling liquid; and establishing spectral line vectors by using the Raman spectra collected in the second step, and performing orthogonal signal correction on the spectral line vectors together with the coefficients, the weights and the loads which are acquired in the first step to acquire corrected vectors, predicated vectors and the concentration of the drilling liquid. The method for measuring all components of the drilling fluid through the online Raman spectra has the advantages of measuring on line without preprocessing the drilling liquid and extracting the drilling liquid, realizing non-contact and non-destructive measurements, shortening the analysis period, and improving the measurement sensitivity and precision, wherein the drilling liquid can be gas, liquid, emulsion, suspension or aerosol; and light hydrocarbon components, heavy hydrocarbon components and non-hydrocarbon components contained in the drilling liquid can be directly measured.

Description

technical field [0001] The present application relates to a method for online determination of the types and concentrations of various components in drilling fluid, in particular to a method for online determination of the types and concentrations of various components in drilling fluid using Raman spectroscopy. Background technique [0002] At present, the determination of drilling fluids in petroleum geological exploration sites includes the determination of the types and concentrations of gaseous components (volatile hydrocarbons, non-hydrocarbons), liquid components (heavy hydrocarbons, oil), and solid components (minerals) in drilling fluids. Obtain formation information through component analysis results, discover oil and gas shows in time, and predict engineering accidents. [0003] A component determination method in the prior art includes gas phase and liquid chromatography, which are used to measure the concentration of gas or liquid in drilling fluid. In the proc...

Claims

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Application Information

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IPC IPC(8): G01N21/65
CPCG01N21/65
Inventor 毕东杰吴升海
Owner SHANGHAI SHENKAI GASOLINEEUM TECH
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