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Lithology electrofacies method

A logging facies and lithology technology, applied in the fields of earthwork drilling, wellbore/well components, etc., can solve the problems of long recognition time and low recognition accuracy, and achieve the effect of improving the recognition accuracy and shortening the recognition time.

Inactive Publication Date: 2015-12-02
PETROCHINA CO LTD
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Problems solved by technology

[0003] However, in the prior art, when analyzing oil and gas wells without cores, the intersection of well logging curves is usually used for lithology identification. In the process of using the intersection of well logging curves, only two-dimensional logging information can be displayed at the same time. , it is necessary to identify lithology through multiple two-dimensional logging information, resulting in long identification time and low identification accuracy

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Embodiment Construction

[0019] The invention provides a method of lithology logging facies, which solves the limitation that the intersection of logging curves can only display two-dimensional logging information at the same time in the non-coring section, and can put multiple logging curves on the same standard at the same time. The lithology is identified by displaying it in the form of a radar chart, which shortens the identification time and improves the identification accuracy.

[0020] The embodiment of the present application The embodiment of the present application provides a method for lithology logging facies, see figure 1 , the method includes:

[0021] Step S101: Obtain N logging parameters corresponding to the oil and gas well, each logging parameter is related to the lithology of the oil and gas well, where N is an integer greater than 2;

[0022] Step S102: performing a homogenization process on the N logging parameters to obtain a lithology identification model;

[0023] Step S103:...

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Abstract

The invention discloses a lithology electrofacies method. The lithology electrofacies method comprises the following steps of acquiring N well logging parameters corresponding to oil gas wells; performing homogenization treatment on the N well logging parameters and acquiring a lithology recognizing model; and determining distribution parameters of each lithology on the basis of various lithologies corresponding to the oil gas wells and the lithology recognizing model. Each well logging parameter is related to the lithology of the corresponding oil gas well, and N is an integer greater than 2. By the lithology electrofacies method, the limitation problem that only two-dimensional well logging information can be displayed when a well logging curve crossplot is used in a non-coring well section is solved. Moreover, a plurality of well logging curves can be displayed in a radar chart under the same standard so as to recognize the lithologies, recognition time is shortened, and recognition precision is improved.

Description

technical field [0001] The invention relates to the technical field of lithology measurement, in particular to a method for lithology logging facies. Background technique [0002] In the existing technology, lithology identification is the basis of reservoir and oil and gas reservoir description. The most direct and effective method to identify lithology in oil and gas basins is core analysis, but it is impossible to take cores in every well, so using conventional The identification of lithology by well logging data has become an inevitable choice, and methods such as well logging curve intersection graph, FMI imaging, ECS element logging and neural network are usually used for lithology identification. [0003] However, in the prior art, when analyzing oil and gas wells without cores, the intersection of well logging curves is usually used for lithology identification. In the process of using the intersection of well logging curves, only two-dimensional logging information ...

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Application Information

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IPC IPC(8): E21B49/00
Inventor 李忠诚王志文刘宇宋鹏张慧宇曾凡成陈振龙
Owner PETROCHINA CO LTD
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