Method for determining content of uranium and organic carbon in uranium-rich hydrocarbon-source rocks

A determination method and source rock technology, applied in geophysical measurement, instruments, etc., can solve problems such as failure to consider the application of radioactive curves, failure to consider the determination of uranium content in uranium-rich source rocks, and errors in calculation results

Inactive Publication Date: 2015-05-27
XI'AN PETROLEUM UNIVERSITY
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Problems solved by technology

[0007] The above-mentioned ΔlgR method is a theoretical-empirical formula proposed in the early research on hydrocarbon generation of source rocks, and it is mainly applicable when the kerogen maturity of source rocks is in immature-high maturity stage; - When the stage of maturity is too high, there are some errors in the calculation results of the ΔlgR method. In addition, because the abundance of organic matter is closely related to the uranium conte

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  • Method for determining content of uranium and organic carbon in uranium-rich hydrocarbon-source rocks
  • Method for determining content of uranium and organic carbon in uranium-rich hydrocarbon-source rocks
  • Method for determining content of uranium and organic carbon in uranium-rich hydrocarbon-source rocks

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[0031] The present invention will be described in detail below with reference to the embodiments of the accompanying drawings.

[0032] like figure 1 As shown, a method for determining uranium content and organic carbon content of uranium-rich source rocks comprises the following steps:

[0033] 1) Obtain source rock core samples from multiple wells in a certain area;

[0034] 2) Experimentally measure the radioactive uranium content of source rock cores;

[0035] The radioactive uranium element content value is the uranium content value of the core sample of the source rock measured by the experimental instrument, and the uranium content in the source rock is represented by U, and the unit is 10 -6 , and the test results in a certain area of ​​the Ordos Basin are shown in Table 1.

[0036] Table 1

[0037]

[0038] 3) Experimentally measure the organic carbon content of source rock cores, the organic carbon content is the organic carbon content of source rock core samp...

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Abstract

A method for determining content of uranium and organic carbon in uranium-rich hydrocarbon-source rocks comprises steps as follows: firstly, hydrocarbon-source rock core samples obtained through multi-hole drilling coring is acquired in a certain area, a radioactive uranium content value and an organic carbon content value of each hydrocarbon-source rock core are measured through an experiment, logging values of a natural gamma curve and a natural gamma-spectrum curve in logging curves, as well as resistivity, compensating sonic differential time and compensating density of the depth position of each rock core are acquired, a corresponding relation between the uranium content and the natural gamma curve as well as the natural gamma-spectrum curve is established and fitted to form a function, the corresponding relation between the organic carbon content values and related logging curve values is established and fitted to form a function, and the uranium content in each depth position and the hydrocarbon-source rock organic carbon content in each depth position in a well are determined according to the fitted function. Response of the uranium-rich hydrocarbon-source rocks in logging information is sufficiently considered, various logging information is comprehensively utilized to quantify and determine the content of uranium and organic carbon in the uranium-rich hydrocarbon-source rocks, and an obtained result is more accurate.

Description

technical field [0001] The invention relates to the technical field of evaluation of uranium-rich source rocks, in particular to a method for determining uranium content and organic carbon content of uranium-rich source rocks. Background technique [0002] Source rocks are the material basis for oil and gas accumulation. Without source rocks, there will be no oil and gas generation. Therefore, it is of great significance to evaluate source rocks, especially uranium-rich source rocks, in oil and gas exploration. [0003] Organic carbon (TOC) content is an important index for evaluating the quality of source rocks, and plays a very important role in estimating the scale of oil and gas resources in sedimentary basins and in oil exploration. At the same time, research in recent years has shown that the enrichment of uranium in source rocks It is usually closely related to the enrichment of organic carbon content (TOC), and has an important stimulating effect on the maturation of...

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Application Information

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IPC IPC(8): G01V11/00
Inventor 刘池阳谭成仟
Owner XI'AN PETROLEUM UNIVERSITY
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