Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for determining oil sources by using sulfur isotopes in monomer sulfur-containing compounds of crude oil

A technology of sulfur isotopes and compounds, applied in the field of oil and gas exploration, can solve the problem of difficulty in accurately determining the parent source, and achieve the effect of solving the difficulty of oil source comparison

Active Publication Date: 2016-04-20
PETROCHINA CO LTD
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Crude oil is rich in sulfur-containing compounds, some of which come from source rocks, and some come from organic-inorganic interactions in reservoirs. Therefore, the sulfur isotope of crude oil is a mixed value, and it is difficult to accurately determine the parent source.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment provides a method for determining the oil source using the sulfur isotope in the sulfur-containing compound of the crude oil monomer, wherein the specific steps of the method are as follows:

[0042] Step 1: 500 mg of total sulfur content is 2.06wt% crude oil (from ZS1C well in Tarim Basin, density at 20°C is 0.791 g / ml) and 5 ml of dichloromethane are added to a 25 ml eggplant bottle, followed by Add 0.45 g of silver tetrafluoroborate, add 0.45 ml of methyl iodide with a syringe under strong stirring, and then stir and react at room temperature for 12 hours in the dark, then repeat the above steps once. After the reaction finished, the silver iodide precipitate generated in the reaction solution was filtered and removed, and the dichloromethane in the filtrate was removed by a rotary distiller;

[0043] Step 2: Add 20 ml of n-hexane to the remaining oil, shake vigorously and cool to 0°C, a precipitate precipitates out, and after the supernatant is poure...

Embodiment 2

[0052] This embodiment provides a method for determining the oil source using the sulfur isotope in the sulfur-containing compound of the crude oil monomer, wherein the specific steps of the method are as follows:

[0053] Step 1: Add 200 mg of crude oil with a total sulfur content of 4.86wt% (from the Luojia area of ​​Shengli Oilfield, with a density of 0.981 g / ml at 20°C) and 2 ml of dichloromethane into a 10 ml eggplant-shaped bottle, Subsequently, 0.43 g of silver tetrafluoroborate was added, 0.43 ml of methyl iodide was added with a syringe under strong stirring, and the reaction was stirred for 12 hours in the dark and at room temperature, and the above steps were repeated once. After the reaction finished, the silver iodide precipitate generated in the reaction solution was filtered and removed, and the dichloromethane in the filtrate was removed by a rotary distiller;

[0054] Step 2: Add 8 milliliters of n-heptane to the remaining oil, shake vigorously and cool to 0°C...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for determining oil sources by using sulfur isotopes in monomer sulfur-containing compounds of crude oil. The method comprises the following steps: crude oil is dissolved in ethanol, dichloromethane or dichloroethane, an alkylating reagent is added, and filtrate is obtained after a reaction; ethanol, dichloromethane or dichloroethane are removed from the filtrate, and oily substances are obtained; the oily substances and an alkane solvent of C5-C7 are mixed, and separation is carried out for deposition; the deposition is dissolved in dichloromethane, trichloromethane or acetonitrile, a first dealkylating reagent is added, and a solution A is obtained; extraction is carried out, and a thiophene compound and a solution B are obtained; a second dealkylating reagent is added into the solution B for carrying out a second dealkylation reaction, and a solution C is obtained; extraction is carried out, and a thioether compound is obtained; sulfur isotopic distribution of monomers in the thiophene compound and the thioether compound as well as sulfur isotopic distribution of sulfate in an oil-generating rock stratum system are determined; two sulfur isotopic distributions are compared, and the stratum whose isotopic distribution is most close to is the oil source layer.

Description

technical field [0001] The invention relates to a method for determining oil source by using sulfur isotopes in sulfur-containing compounds of crude oil monomer, and belongs to the technical field of oil and gas exploration. Background technique [0002] Oil-source correlation is a key link in oil and gas exploration, which is related to the selection of favorable areas for exploration and the evaluation of resource potential. Due to the loss of biomarker compounds or similar biomarker compounds in multiple sets of strata, it is difficult to compare oil sources. For example, whether the marine oil and gas in the Tarim Basin comes from Cambrian source rocks or Ordovician source rocks, Or mixed sources, etc., have always been controversial; another example, whether the condensate oil of the Leikoupo Formation in the Zhongba Gas Field in the Sichuan Basin is marine strata or is generated from Triassic continental source rocks, etc., all oil and gas-bearing basins have different...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N33/28G01N30/72G01V9/00
CPCG01N30/72G01N33/2823G01V9/00
Inventor 朱光有王萌史权
Owner PETROCHINA CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com