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Method for automatically identifying polarity-reversed channel based on first arrival wave

A technology of reverse polarity and polarity, applied in image analysis, instruments, calculations, etc., can solve problems such as heavy workload and low recognition efficiency, and achieve the effect of improving efficiency

Inactive Publication Date: 2014-03-26
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the current identification methods are more limited to the identification of the naked eye, so the workload is large, the identification efficiency is low, and an efficient identification method is required

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  • Method for automatically identifying polarity-reversed channel based on first arrival wave
  • Method for automatically identifying polarity-reversed channel based on first arrival wave
  • Method for automatically identifying polarity-reversed channel based on first arrival wave

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Embodiment Construction

[0014] Embodiments of the invention will now be described in detail, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like parts throughout. The embodiments are described below in order to explain the present invention by referring to the figures.

[0015] In the field of seismic data processing, the first arrival wave usually refers to the seismic signal that is excited by the shot point and reaches the receiving point first. The source of the first arrival wave is very wide, covering almost all kinds of seismic waves, including direct arrival wave, reflected wave, refracted wave, diffracted wave, back-bend wave and so on. Since the propagation time of the first wave is the shortest among the seismic signals arriving at the same point, the energy is usually stronger.

[0016] Below, refer to figure 1 A method for identifying reverse polarity tracks based on first arrivals according to an exemplary embodiment of the pre...

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Abstract

The invention provides a method for automatically identifying a polarity-reversed channel based on a first arrival wave. The method comprises the following steps of: converting a seismic record oscillogram of a plurality of seismic channels into a grayscale, and performing edge detection on the grayscale to obtain boundary points of each seismic channel; determining uncertain boundary points in the obtained boundary points and deleting the uncertain boundary points; performing interpolation on the rest of boundary points of the seismic channels to obtain the boundary points of all the seismic channels; mapping the smoothed boundary points to the seismic record oscillogram so as to pick up a first takeoff of each seismic channel; and judging the polarity of the seismic channels according to whether a first arrival peak is behind the first arrival takeoff of the seismic channels.

Description

technical field [0001] The invention relates to the field of seismic data processing, more specifically, to a method for identifying reverse polarity traces based on first arrival waves. Background technique [0002] In oil exploration, it is very important to evaluate the quality of field surveillance records, and reverse polarity often appears in single-shot data, so the evaluation and analysis of reverse polarity is particularly important. [0003] However, the current identification methods are more limited to the identification of the naked eye, so the workload is heavy and the identification efficiency is low, and an efficient identification method is required. Contents of the invention [0004] In order to improve the identification efficiency of seismic traces in seismic record data, the present invention provides a method for identifying antipolar traces based on first arrival waves. [0005] A method for identifying antipolar traces based on first arrivals accor...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G01V1/28
Inventor 耿春敬龙江龙资强胡善政黎书琴陈爱萍刘鸿
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD