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Crude Oil Density Prediction Method Based on Saturated Hydrocarbon Biomarker Parameters

A biomarker, crude oil technology, applied in specific gravity measurement, measurement device, complex mathematical operation, etc., can solve problems such as large prediction error

Active Publication Date: 2021-02-09
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology

At present, the surface crude oil density prediction methods in the Bohai Sea area of ​​the Bohai Bay Basin include geological analogy and reservoir rock pyrolysis. The former ignores the influence of different geological conditions on crude oil density, and the latter is susceptible to multi-stage charging and storage. Influenced by the type of laminar fluid, the prediction errors of the two methods are very large

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  • Crude Oil Density Prediction Method Based on Saturated Hydrocarbon Biomarker Parameters
  • Crude Oil Density Prediction Method Based on Saturated Hydrocarbon Biomarker Parameters
  • Crude Oil Density Prediction Method Based on Saturated Hydrocarbon Biomarker Parameters

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[0032] The crude oil density prediction method based on saturated hydrocarbon biomarker parameters of the present invention will be described in detail below with reference to the examples and drawings.

[0033] The crude oil density prediction method based on saturated hydrocarbon biomarker parameters of the present invention uses the normal alkanes and C detected by saturated hydrocarbon gas chromatography mass spectrometry. 29 The correlation between the relative abundance of 25-nor-17α(H), 21β(H)-hopane and the measured surface crude oil density (20°C, the same below) was used to predict the surface crude oil density of oil-bearing intervals without crude oil samples. With the gradual increase of the relative abundance of n-alkanes, the surface crude oil density gradually increases. The former is a quadratic function of the latter, which is used to predict the surface crude oil density of medium and light crude oil. With C 29 The abundance of 25-nor-17α(H) and 21β(H)-ho...

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Abstract

A crude oil density prediction method based on saturated hydrocarbon biomarker parameters, comprising: collecting crude oil saturated hydrocarbon biomarkers, including n-alkanes series, terpanes series, sterane series and alkylcyclohexane series biomarkers identification and Relative quantification; calculate crude oil saturated hydrocarbon parameters; establish a fitting formula based on the correlation between crude oil saturated hydrocarbon parameters and surface crude oil density; predict the surface crude oil density of the target oil-bearing formation according to the fitting formula. The purpose of the present invention is to predict the surface crude oil density of the target oil-bearing layer system by gas chromatography-mass spectrometry analysis of the saturated hydrocarbon components of the wall core or a small amount of rock core extract. The invention performs fitting and forecasting of medium and light oil and heavy oil in sections, and has the advantages of simple operation, low cost, high precision and few affected factors.

Description

technical field [0001] The invention relates to a crude oil density prediction method. In particular, it relates to a crude oil density prediction method based on saturated hydrocarbon biomarker parameters. Background technique [0002] Geochemistry is one of the supporting professional fields of petroleum exploration. Saturated hydrocarbon components are one of the main components of crude oil and an important factor affecting the density of crude oil on the ground. Saturated hydrocarbon gas chromatography-mass spectrometry is an important technical method for analyzing the relative content of various compounds in crude oil saturated hydrocarbon components, and then judging the characteristics of crude oil and comparing oil sources. Surface crude oil density correlated well with certain crude oil saturates biomarker parameters. [0003] Surface crude oil density is generally obtained through actual measurement, and is an important parameter for calculation of crude oil re...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N9/00G01N30/02G06F17/15
CPCG01N9/00G01N30/02G01N2030/025G06F17/15
Inventor 王军徐长贵牛成民吴奎王清斌张如才王飞龙王冰洁
Owner CHINA NAT OFFSHORE OIL CORP
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