Method for separating and enriching gonane and hopane biomarkers in combination with molecular sieves

A biomarker, separation and enrichment technology, applied in separation methods, chemical instruments and methods, steroids, etc., can solve problems such as poor repeatability of carbon isotope values

Active Publication Date: 2015-05-20
PETROCHINA CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the repeatability of hydrocarbon carbon isotope values ​​of the biomarker compounds separated and enriched by the Y-type molecular sieve is poor[8-9], and the technology of the biomarker compound separated and enriched by the X-type molecular sieve also has room for improvement; There are two kinds of molecular sieves for separating hopane, namely 10X and 13X

Method used

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  • Method for separating and enriching gonane and hopane biomarkers in combination with molecular sieves
  • Method for separating and enriching gonane and hopane biomarkers in combination with molecular sieves
  • Method for separating and enriching gonane and hopane biomarkers in combination with molecular sieves

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Embodiment 1

[0033] 1. With 60mg of crude oil or rock extract, fill the column with 6g of silica gel with a particle diameter of 40 microns, and wash with 12ml of n-hexane to prepare saturated hydrocarbons.

[0034] 2. Volatilize the solvent on a nitrogen blowing instrument, weigh the mass of saturated hydrocarbons, take ZSM-5 molecular sieves about 100 times the mass of saturated hydrocarbons to fill the column, and wash with 20ml of isooctane to prepare cyclic hydrocarbons.

[0035] 3. Volatilize the solvent on a nitrogen blowing instrument, weigh the mass of the cyclic hydrocarbon, fill the column with 13X molecular sieves about 300 times the mass of the cyclic hydrocarbon, and wash it with 60ml of n-pentane after 30 minutes to prepare the fraction Z.

[0036] 4. After recovering and volatile fraction Z solvent, weigh its mass, take 300 times of 10X molecular sieves to fill the column, concentrate the solution obtained in step 3 onto the column, rinse with two 5ml n-pentane and collect the...

Embodiment 2

[0060] 1. Select 60 mg of crude oil sample from Well Liu 43 in Yumen Oilfield, fill the column with 6 g of silica gel with a particle diameter of 40 microns, and wash with 12 ml of n-hexane to prepare saturated hydrocarbons.

[0061] 2. Volatilize the solvent on a nitrogen blowing instrument, weigh the mass of saturated hydrocarbons, take ZSM-5 molecular sieves about 100 times the mass of saturated hydrocarbons to fill the column, and wash with 20ml of isooctane to prepare cyclic hydrocarbons.

[0062] 3. Volatilize the solvent on a nitrogen blowing instrument, weigh the mass of the cyclic hydrocarbon, fill the column with 13X molecular sieves about 300 times the mass of the cyclic hydrocarbon, and wash it with 60ml of n-pentane after 30 minutes to prepare the fraction Z.

[0063] 4. After recovering and volatile fraction Z solvent, weigh its mass, take 300 times of 10X molecular sieves to fill the column, concentrate the solution obtained in step 3 onto the column, rinse with ...

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Abstract

The invention relates to a method for separating and enriching gonane and hopane biomarkers in combination with molecular sieves, comprising the steps of 1) weighing a sample, adding the sample to a fine silica gel packed column, and leaching with n-hexane to separate out saturated hydrocarbons; 2) adding to a ZSM-5 molecular sieve packed column, and leaching with isooctane to separate out cyclic and isomeric components of the saturated hydrocarbons; 3) adding to a 13X molecular sieve packed column, leaching the column with n-pentane, and drying the column with nitrogen; 4) concentrating the solution obtained in the step 3) to a 10X molecular sieve packed column, leaching with two parts of n-pentane and collecting two fractions of gonane; 5) extracting the 13X molecular sieve for 10h with isooctane to obtain a hopane component; and 6) concentrating the solution obtained in steps 4) and 5), and measuring in a machine. The method can be used for effectively separating and enriching gonane and hopane, so that the determination of monomer hydrocarbon stable carbon isotopes of the gonane and hopane biomarkers becomes possible.

Description

Technical field: [0001] The invention relates to a method for separating and preparing biomarker compounds sterane and hopane in petroleum geological samples. Background technique: [0002] The oil-gas-bearing basins in central and western my country are mainly superimposed basins, where multiple sets of source rocks and reservoirs are developed, and the oil-gas-bearing systems are relatively complex. Since the source rocks in most basins are old in age, have a long history of organic matter thermal evolution, high maturity, and the distribution of source bodies in the deep area of ​​the sag is unknown, many exploratory wells cannot obtain source rocks matching the maturity of crude oil, and have to use outcropping Source rocks were used for oil-source correlation. Due to the difference in maturity, the characteristics of mass spectrometry analysis of biomarker compounds vary greatly, and the results of oil source comparison are often varied; the appearance of stable carbon...

Claims

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Application Information

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IPC IPC(8): C07J63/00C07J9/00B01D15/20
CPCB01D15/10C07J9/00C07J63/008
Inventor 蒋宜勤王汇彤靳军魏彩云任江玲翁娜王海静刘小江廖健德高秀伟
Owner PETROCHINA CO LTD
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