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A Stratum Correlation Method

A stratigraphic correlation and stratigraphic technology, applied in the field of geology, can solve problems such as incomplete agreement between logging curves and stratum parameters, abnormal interference, data storage jumps, etc., to facilitate analysis and decision-making, accurate comparison results, and improve identification accuracy Effect

Inactive Publication Date: 2017-01-18
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

However, in the process of obtaining well logging curves, there are various uncertain factors, such as the aging of electronic components of well logging instruments, abnormal interference in the measurement process, operator errors, jumps in the process of data storage, etc. As a result, the measured logging curve does not fully match the formation parameters

Method used

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Embodiment Construction

[0048] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0049] Such as figure 1 As shown, the basic idea of ​​the present invention is aimed at the actual situation of the formation comparison problem in the geological description of the reservoir, and the comparison work of the well logging curve is divided into the following parts: 1) to the processing of the well logging data; 2) using the cloud The expectation curve is fitted to the logging data; 3) The similarity measurement of the formation; 4) The result analysis. The above method can adapt to various logging curves, and improves the comparison accuracy to a considerable extent, meeting the requirements of practical application.

[0050] 1. Processing of logging data

[0051] Such as figure 2As shown, Well No. 1 and Well No. 2 are two drilling areas on a section of a basin, which are close to the sedimentary environment and have similar se...

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Abstract

The invention discloses a stratum correlation method. The comparison method includes: a. according to the shape and degree of the well log curve, the two wells to be compared are processed in layers, and each well is divided into several well layers; b. Fitting the expected curve, obtaining multiple cloud models through fitting, calculating the digital characteristics of each cloud model, and selecting the appropriate cloud model to be compared; c, performing the Euclidean distance-based The similarity measure of the similarity measure and the similarity measure based on the trust level cloud are calculated to obtain the corresponding similarity measure value; d. Complete the stratum comparison according to the similarity measure value obtained in step c. The method of the invention makes full use of the characteristics of well logging data, improves the recognition accuracy to a great extent, and can carry out formation comparison work in production practice.

Description

technical field [0001] The invention belongs to the field of geology, and in particular relates to a stratum correlation method. Background technique [0002] In the process of petroleum development, the correct correlation of reservoirs is of great significance for revealing the interlayer heterogeneity and understanding the macroscopic and microscopic heterogeneity of individual oil-bearing sand bodies. Stratigraphic correlation is one of the basic tasks of stratigraphic analysis. [0003] Stratigraphic correlation refers to the comparative study of stratigraphic units in different regions according to their characteristics such as lithology and paleontological fossils, and then to determine whether these units are equivalent in horizon and similar in time. [0004] Understand the stratigraphic sequence, lithofacies, and layer thickness changes through stratigraphic correlation; find out the contact relationship between faults and unconformities; study the vertical and la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00G01V1/50
Inventor 刘玉杰李宗民陈凯张昕
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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