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Method for discriminating affinity of high-maturity crude oil

A discrimination method and maturity technology, applied in the field of discrimination of parentage of high-maturity crude oil

Inactive Publication Date: 2019-04-02
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for discriminating the parentage of high-maturity crude oil, so as to overcome the distortion of the maturity of high-mature crude oil and the similarity of static oil-source maturity in multi-cycle basins in the prior art by using the conventional method of saturated hydrocarbons Defects in oil source comparison

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  • Method for discriminating affinity of high-maturity crude oil

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Embodiment

[0040] This embodiment further illustrates the method for discriminating the parentage of high-maturity crude oil according to the present invention in combination with Dongpu Sag, Bohai Bay Basin, China.

[0041] The Dongpu sag is a faulted basin, and the Paleogene source rocks are deeply buried, up to 7000m near the depression, where both oil and gas are generated, and the near depression is dominated by high-maturity condensate oil and gas reservoirs.

[0042] The method for discriminating the parentage of high-maturity crude oil of the present embodiment comprises the following steps:

[0043] 1) Qualitative analysis of aromatic hydrocarbon biomarker compounds

[0044] Aromatic components were separated from crude oil and source rock extracts in the Wenliu area of ​​Dongpu Sag. The aromatic components were analyzed by gas chromatography-mass spectrometry. According to the relative retention time, Mass chromatograms, mass spectra, standard samples, characteristic ion fragm...

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Abstract

The invention relates to a method for discriminating affinity of a high-maturity crude oil, and belongs to the technical field of oil and gas exploration and development. The method for discriminatingaffinity of the high-maturity crude oil provided by the invention comprises the following steps: 1) calculating the relationship between the methylphenanthrene index MPI and the vitrinite reflectanceRo of the phenanthrene series compound in the source rock extract to obtain the values of A, B, C, and D; 2) calculating the relationship between the methylphenanthrene index MPI of the phenanthreneseries compound in the crude oil and the maturity Rc of the crude oil to obtain Rc; 3) establishing a change relationship between the vitrinite reflectance and the geological history of the source rocks of different horizons; and 4) assuming the source horizon and accumulation time of crude oil by using the Rc in the step 2) and the change relationship between the vitrinite reflectance and the geological history determined in the step 3). The method for discriminating affinity of the high-maturity crude oil provided by the invention can finely determine the source of deep oil and gas, therebyguiding the efficient exploration of deep oil and gas.

Description

technical field [0001] The invention relates to a method for discriminating the parentage of high-maturity crude oil, which belongs to the technical field of oil and gas exploration and development. Background technique [0002] In the past ten years, with the deepening of exploration and development of oil and gas fields, the exploration of middle and shallow layers has become more and more difficult, and the remaining oil and gas resources have become smaller and smaller. The transition to deep exploration has become inevitable. According to three resource evaluations, the remaining oil and gas resources in the deep layers are much greater than those in the middle and shallow layers. However, due to the geological characteristics of high temperature and high pressure in the deep layers, the source rocks have passed the peak oil generation period, resulting in the generation of saturated hydrocarbons. The end point of isomerization has been reached, and the changes in finge...

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Application Information

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IPC IPC(8): G01N30/02
CPCG01N30/02
Inventor 徐田武张云献张洪安刘海燕游小淼鹿坤李长春王肯堂
Owner CHINA PETROLEUM & CHEM CORP
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