Method and device for determining content of organic carbon in hydrocarbon source rock on basis of multiple well logging parameters

A technology of organic carbon and hydrocarbon source rocks, which can be used in measurement, earthwork drilling and production, wellbore/well components, etc., and can solve the problems of low calculation accuracy and accuracy

Active Publication Date: 2016-01-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide a method for determining the organic carbon content of source rocks based on well logging multi-parameters, to solve the problem of low calculation precision and accuracy of existing calculation methods and large errors

Method used

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  • Method and device for determining content of organic carbon in hydrocarbon source rock on basis of multiple well logging parameters
  • Method and device for determining content of organic carbon in hydrocarbon source rock on basis of multiple well logging parameters
  • Method and device for determining content of organic carbon in hydrocarbon source rock on basis of multiple well logging parameters

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Embodiment 1

[0075] The method for determining the organic carbon content of source rocks based on logging multi-parameters in this embodiment takes Well T1 in the Yichuan Sag as an object for calculation, and includes the following steps:

[0076] 1) Obtain the organic carbon content of source rock core analysis samples and the logging values ​​of multiple parameters such as natural gamma ray, resistivity, acoustic time difference, compensated neutrons and density in the logging curve at the corresponding depth of each core sample, As shown in Table 1; the log values ​​are from the corresponding features of the corresponding curves (natural gamma ray, resistivity, sonic transit time, density and compensated neutrons);

[0077] Table 1 Organic carbon value and logging value at core depth of Well T1 in Yichuan area

[0078]

[0079] 2) According to the organic carbon content value obtained in step 1) and the obtained logging value, the corresponding relationship between the organic carbo...

Embodiment 2

[0093] The method for determining the organic carbon content of source rocks based on logging multi-parameters in this embodiment takes Well N4 in the Yining Sag as an object for calculation, and the specific operation steps are the same as those in Embodiment 1.

[0094] The function expression obtained in this embodiment is as follows:

[0095]

[0096] The source rock organic carbon content value calculated by this embodiment and the organic carbon content value measured by the experiment are two sets of data to draw the transaction chart, the result is as follows Figure 8 shown. From Figure 8 It can be seen that the abscissa indicates the source rock organic carbon content (calculated TOC) calculated by the fitting function in this embodiment, and the ordinate indicates the source rock organic carbon content value (measured TOC) measured experimentally. Each core The data fitting degree of the organic carbon content of the two groups at the sample depth is relativel...

Embodiment 3

[0099] The device for determining the organic carbon content of source rocks based on logging multi-parameters in this embodiment, such as Figure 10 As shown, it includes a core homing module 1, a data acquisition module 2, a data analysis module 3, a function fitting module 4 and a value determination module 5;

[0100] The core homing module 1 is used to perform core homing to the core sample before the data acquisition module acquires data;

[0101] The data acquisition module 2 includes a measured organic carbon content data acquisition module and a logging value acquisition module, the measured organic carbon content data acquisition module is used to obtain the experimentally measured organic carbon content of source rocks, the logging value The obtaining module is used to obtain the logging values ​​of natural gamma ray, resistivity, acoustic time difference, compensated neutron and density in the logging curve at the corresponding depth of each core sample;

[0102] ...

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Abstract

The invention discloses a method and a device for determining the content of organic carbon in hydrocarbon source rock on the basis of multiple well logging parameters. The method includes 1), acquiring content values of the organic carbon in rock core samples of the hydrocarbon source rock and well logging values of natural gamma, resistivity, acoustic wave time difference, compensation neutrons and density in well logging curves at corresponding depths; 2), establishing corresponding relations between the content of the organic carbon and the obtained well logging values according to the obtained content values of the organic carbon and the obtained well logging values and obtaining functions by means of fitting; 3), determining the content of the organic carbon of the hydrocarbon source rock at the different depths according to the obtained functions. The method and the device for determining the content of the organic carbon of the hydrocarbon source rock on the basis of the multiple well logging parameters have the advantages that response of the various well logging values of the natural gamma, the resistivity, the acoustic wave time difference, the compensation neutrons and the density to the content of the organic carbon in the hydrocarbon source rock are integrated with one another, and the fitting functions are established, so that the content of the organic carbon can be computed, computation values of the content of the organic carbon are longitudinally continuous, computation results and measured values of the organic carbon are excellent in goodness of fit, and the method and the device are high in computational accuracy.

Description

technical field [0001] The invention belongs to the technical field of oil and gas well logging, and in particular relates to a method for determining the organic carbon content of source rocks based on well logging multi-parameters, and also relates to a device for determining the organic carbon content of hydrocarbon source rocks based on well logging multi-parameters. Background technique [0002] Source rocks refer to rocks that have generated or are likely to generate oil and gas, or have the potential to generate oil and gas. [0003] The content of organic carbon in source rocks mainly reflects the abundance of organic matter in source rocks. Under the premise of other similar conditions, the higher the organic carbon content, the higher the hydrocarbon generation capacity. The organic carbon content of source rocks is mainly controlled by factors such as source rock lithology and rock composition, and the lithology and rock composition of source rocks are different ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00
Inventor 邓晓梅杜建波曹建康李秋博常大宇于明德胡俊卿侯娟赵莹彬林水清张扬汤金虎
Owner CHINA PETROLEUM & CHEM CORP
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