Stratigraphic correlation method

A stratigraphic comparison and stratigraphic technology, applied in the field of geology, can solve problems such as abnormal interference, log curves not completely consistent with formation parameters, and data storage jumps, etc., to achieve accurate comparison results, facilitate analysis and decision-making, and improve recognition accuracy. Effect

Inactive Publication Date: 2014-08-20
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

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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 stratigraphic correlation method. The stratigraphic correlation method includes the steps that a, hierarchical processing is performed on two wells to be compared according to the form and the degree of a well logging curve, and each well is divided into a plurality of well layers; b, each hierarchically processed well layer is fitted through a cloud expectation curve, a plurality of cloud models are obtained through fitting, numerical characteristics of all the cloud models are calculated, and an appropriate cloud model to be used for comparison is selected; c, the appropriate cloud model is selected from the step b, similarity measurement based on Euclidean distance and similarity measurement based on trust level cloud are performed, and a similarity measurement value is obtained through calculation; d, stratigraphic correlation is completed according to the similarity measurement value obtained in the step c. According to the method, the characteristics of well logging data are fully utilized, the recognition accuracy is improved to a great extent, and stratigraphic correlation work can be carried out 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...

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Application Information

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Patent Type & Authority Applications(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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