Method for automatically determining complex lithology based on intersection graphs and Fisher discrimination

A technology of complex lithology and discrimination method, applied in complex mathematical operations, seismology for logging records, seismic signal processing, etc., to achieve the effect of improving discrimination accuracy and efficiency

Inactive Publication Date: 2020-01-10
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0010] Aiming at the problems existing in the prior art, the present invention provides an automatic discrimination method for complex lithology based on crossplot and Fisher discrimination. The lithology discrimination of underground complex geological bodies based on well data is especially suitable for automatic lithology discrimination in the case of more than 4 lithologies, which can greatly improve the efficiency

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  • Method for automatically determining complex lithology based on intersection graphs and Fisher discrimination
  • Method for automatically determining complex lithology based on intersection graphs and Fisher discrimination
  • Method for automatically determining complex lithology based on intersection graphs and Fisher discrimination

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[0039] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0040] Aiming at the problems existing in the prior art, the present invention provides an automatic complex lithology discrimination method based on crossplot and Fisher discrimination. The present invention will be described in detail below in conjunction with the accompanying drawings.

[0041] Such as figure 1 As shown, the complex lithology automatic discrimination method based on crossplot and Fisher discrimination provided by the embodiment of the present invention comprises the following steps:

[0042]S101: Source of lithology samples: Using core and cuttings data, using means of observation, description and testi...

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Abstract

The invention belongs to the technical field of oil and gas exploration and development, and discloses a method for automatically determining complex lithology based on intersection graphs and Fisherdiscrimination, and the method comprises the following steps of establishing a connection between the lithology of core discrimination and corresponding logging curve data by taking the lithology discrimination data of core data as a female parent, establishing an automatic lithology discriminative model that fuses the intersection graphs and Fisher discrimination by taking the logging curve dataas a learning sample, discriminating a large number of logging curves by using the mode, and automatically discriminating the lithology of all wells. The method provided by the invention has clear principles and accurate results, is mainly proposed for the development of complex lithology discrimination of multiple lithology types, is suitable for the lithology discrimination of a large number ofunderground complex geological bodies with logging data, is particularly suitable for automatic lithology discrimination under complex conditions with more than four kinds of lithologies, and can greatly improve efficiency and degree of discrimination accuracy.

Description

technical field [0001] The invention belongs to the technical field of petroleum and natural gas exploration and development, and in particular relates to an automatic discrimination method for complex lithology based on crossplot and Fisher discrimination. Background technique [0002] At present, the closest existing technology: lithology is the basis of underground geological research, an important basis for judging the origin and formation environment of geological bodies, and important data for studying the origin of geological bodies, formation environment and evaluating reservoirs. Therefore, lithology discriminant analysis is one of the important research contents in the field of oil and gas exploration and development. The current new geological theory of major oil and gas exploration and the advancement of deep drilling technology have provided important conditions for the steady growth of my country's proven oil and gas reserves and the development of oil and gas ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/50G06F17/18
CPCG01V1/50G06F17/18
Inventor 徐守余魏海军王舒霍辽原牛磊张一帆朱鹏飞王秀哲
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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