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Method and device for division of sedimentary cycles

A sedimentary cycle and frequency component technology, applied in the field of oil and gas exploration, can solve the problems of large error and low efficiency

Active Publication Date: 2018-12-25
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The embodiment of the present application provides a method and device for dividing sedimentary cycles to solve the technical problems of large errors and low efficiency when dividing sedimentary cycle curves in the existing method for dividing sedimentary cycles

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  • Method and device for division of sedimentary cycles
  • Method and device for division of sedimentary cycles
  • Method and device for division of sedimentary cycles

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Embodiment Construction

[0074] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the drawings in the embodiments of this application. Obviously, the described The embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work should fall within the protection scope of this application.

[0075] Taking into account the existing methods for dividing sedimentary cycles, it is usually necessary to first divide the corresponding sedimentary cycle curves during specific implementation. The division of sedimentary cycle curves is generally based on the calculated frequency attribute curve, and according to the trend of the curve, people are su...

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Abstract

The embodiment of the invention provides a method and device for sedimentary cycle division. The method comprises the following steps: obtaining a peak frequency attribute curve according to seismic data; performing frequency division smoothing of the peak frequency property curve, and obtaining a low-frequency attribute band-pass frequency component curve and a high-frequency attribute band-pass frequency component curve; performing broken line processing of the low-frequency attribute band-pass frequency component curve and the high-frequency attribute band-pass frequency component curve, and obtaining a first sedimentary cycle curve and a second sedimentary cycle curve. According to the scheme, the frequency division processing is performed through a filter, the curve after frequency division is subjected to broken line processing to obtain a corresponding sedimentary cycle curve. The technical problems are solved that the error is large, the efficiency is low and the qualification or semiquantitative analysis is only performed in the current sedimentary cycle division, and therefore the technical effects are achieved that the seismic data is fully utilized to rapidly and accurately perform the sedimentary cycle division.

Description

Technical field [0001] This application relates to the field of oil and gas exploration technology, and in particular to a method and device for dividing sedimentary cycles. Background technique [0002] In the process of oil and gas exploration, it is often necessary to analyze the sedimentary cycles first when dividing the target strata into sedimentary cycles. Among them, the above-mentioned sedimentary cycle refers to the result of periodic sea level rise and fall in nature. Specifically: It has periodicity in time, similarity in genesis, cyclicity in geology, and certain response characteristics in geophysics. For example, the regular changes of seismic wave spectral characteristics in the seismic wave field. Therefore, through the analysis of sedimentary cycles, the analysis of seismic facies and sedimentary facies, the study of sequence stratigraphy and even the prediction of reservoirs can be further realized. [0003] At present, in order to divide the sedimentary cycle...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/50
CPCG01V1/50G01V2210/6169
Inventor 贺文杨平岳鹏飞吴嘉兴
Owner BC P INC CHINA NAT PETROLEUM CORP