Vertical seismic multi-wave data based predication method and system for depth before drilling

A vertical seismic and depth prediction technology, applied in the field of geophysical exploration, can solve the problems of difficulty in determining the depth of the junction, restriction of prediction accuracy, and large uncertainty, and achieve the effects of reducing contingency, reliable data support, and increasing prediction accuracy

Active Publication Date: 2014-12-10
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0005] (1) The operation of this method itself needs to rely on visual observation to determine the direction of straight line extension, which has great uncertainty and will cause operational errors;
[0006] (2) This method only performs curve tracing on the upward and downward longitudinal waves of the target layer, and can onl

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  • Vertical seismic multi-wave data based predication method and system for depth before drilling

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[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] The purpose of the present invention is to effectively use the rich wave field information of VSP to predict the depth of the target layer before drilling, solve the problem of insufficient accuracy of the existing prediction method, and provide the pre-drilling depth data of the target layer for drilling engineering in a timely and accurate manner.

[0034] figure 1 A specific flow chart of a pre-drilling depth prediction method based on vertical seism...

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Abstract

The invention provides a vertical seismic multi-wave data based predication method and system for depth before drilling. The vertical seismic multi-wave data based predication method for the depth before drilling comprises collecting vertical earthquake multi-wave data; processing the vertical earthquake multi-wave data and obtaining the processed vertical earthquake multi-wave data; obtaining an over well ground seismic section; identifying a target stratum position and wave group characteristics on the over well ground seismic section; identifying a direct wave, a converted wave and a reflected wave lineup which is corresponding to the target stratum from the processed vertical seismic multi-wave data according to the target stratum position and the wave group characteristics; establishing a time-depth function according to the direct wave, the converted wave and the reflected wave lineup; confirming the prediction depth and the prediction time according to the time-depth function. The vertical seismic multi-wave data based predication method for the depth before drilling solves the problem that the existing predication method is not enough in accuracy and timely and accurately provides the depth data before drilling of the target stratum for the drilling engineering.

Description

technical field [0001] The present invention relates to the technical field of geophysical exploration, in particular to the application and processing technology of multi-wave in vertical seismic data, specifically a pre-drilling depth prediction method and system based on vertical seismic multi-wave data. Background technique [0002] Pre-drilling depth prediction using vertical seismic data is a traditional geophysical exploration technology, which almost appeared with the birth of vertical seismic data observation method. Up to now, pre-drilling depth prediction using vertical seismic data is still an important geophysical means to obtain information about the target layer ahead of the drill bit. [0003] In recent years, vertical seismic data technology has developed rapidly, but its pre-drill depth prediction method has hardly any progress. In the existing technology, only the method mentioned by Zhu Guangming in the book "Vertical Seismic Method" in 1986 is represent...

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Application Information

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IPC IPC(8): G01V1/40G01V1/28
Inventor 蔡志东张庆红刘洪涛范桦
Owner BC P INC CHINA NAT PETROLEUM CORP
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