Microscopic quantitative characterization method of organic lamina

A quantitative characterization and organic matter technology, applied in the field of petroleum geological exploration, can solve the problems of relying on the recognition ability of the naked eye, lack of quantitative analysis methods, and less research

Active Publication Date: 2017-06-16
PETROCHINA CO LTD
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Problems solved by technology

However, this quantitative analysis is only a reconstruction model of organic matter distribution based on probability and statistics, and the identification of organic matter depends on the ability to identify with the naked eye, which is highly subjective and not a real quantitative analysis method.
[0005] Generally speaking, scholars have relatively little research on the characteristics of organic laminae, mostly focusing on the genetic mechanism and feature description of the laminae, and there is still a lack of effective quantitative analysis methods

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  • Microscopic quantitative characterization method of organic lamina
  • Microscopic quantitative characterization method of organic lamina
  • Microscopic quantitative characterization method of organic lamina

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Embodiment

[0048] This example provides a microscopic quantitative characterization method for organic laminae (the organic laminae of the black shale of the Doushantuo Formation in Well ZK102), the process of which is as follows figure 1 shown, including the following steps:

[0049] Step 1: According to the sample size and thickness requirements of the sample cell of the laser ablation system used, the black shale is cut into cube-shaped samples with a length of 76mm×26mm and a thickness of 2mm with a core cutter.

[0050] Step 2: Select a cut surface with obvious organic lamination characteristics in the rectangular sample, and polish the cut surface to obtain a laser ablation target sample, clean it in an ultrasonic cleaner for 5 minutes, dry it in an oven at 50°C, and then scrub it with acetone. Ensure that the surface of the laser ablation target sample to be analyzed is clean.

[0051] Step 3: Using a combined system consisting of a laser ablation system and an inductively couple...

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Abstract

The invention provides a microscopic quantitative characterization method of an organic lamina. The microscopic quantitative characterization method comprises the following steps: cutting sediment to form a sample with a regular shape, and polishing the tangent plane, having obvious characteristics, of the organic lamina to obtain a laser ablation target sample; setting an appropriate light spot size and a scanning speed, and carrying out laser ablation-inductively coupled plasma-mass spectrometry experiments to obtain the signal counts of all trace elements; and carrying out correlation conversion on the content of nutrient trace elements and the content of organic matters to realize quantitative characterization of the thickness, the concentration and the content of the organic lamina in the sediment. The microscopic quantitative characterization method of the organic lamina provides a quantitative means for researches of fine-grained sediment, hydrocarbon source rock heterogeneity and hydrocarbon source rock growth environment, and has certain application values in the fields of hydrocarbon source rock researches, oil gas resource evaluation and unconventional oil gas and other geologic base fields.

Description

technical field [0001] The invention belongs to the technical field of petroleum geological exploration, and relates to a microscopic quantitative characterization method of organic laminae. Background technique [0002] In the contemporary petroleum industry, source rock is the core of petroleum exploration, and organic matter is the core of source rock research. As the source of hydrocarbon-generating substances, the content and type of sedimentary organic matter determine the type of hydrocarbon generation and the amount of resources. Research on unconventional geological foundations further shows that organic matter content also affects shale pore space and adsorption capacity, and plays a decisive role in the gas content of organic-rich shale. Therefore, describing the occurrence and distribution of organic matter plays a vital role in determining the type of oil and gas products, evaluating the amount of oil and gas resources and the development potential of shale gas...

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Application Information

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IPC IPC(8): G01N21/68
CPCG01N21/68
Inventor 王华建张水昌王晓梅何坤王宇
Owner PETROCHINA CO LTD
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