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Point-by-point excitation well depth designing method based on uniform near-surface model

A technique for stimulating well depth and near the surface, which is applied in the fields of seismology and seismic signal processing for well logging records, and can solve the problem of low signal-to-noise ratio and resolution of seismic data, inaccurate values, and inability to realize point-by-point excitation well depth design To improve the data quality, optimize the design, and improve the recording signal-to-noise ratio

Inactive Publication Date: 2010-07-28
CHINA PETROCHEMICAL CORP +1
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Problems solved by technology

[0005] The purpose of the present invention is to provide a point-by-point excitation well depth design method based on a consistent near-surface model, which overcomes the inability to establish a comprehensive and consistent near-surface model in the prior art, and cannot realize the current situation of point-by-point excitation well depth design based on a fine and consistent model, thereby solving the problem of The signal-to-noise ratio and resolution of seismic data are low due to the inaccurate value of the excitation well depth in the field

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  • Point-by-point excitation well depth designing method based on uniform near-surface model
  • Point-by-point excitation well depth designing method based on uniform near-surface model
  • Point-by-point excitation well depth designing method based on uniform near-surface model

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Embodiment 1

[0037] figure 1 It is a schematic diagram of the processing flow of a preferred embodiment of the point-by-point excitation well depth design method based on the consistent near-surface model provided by the embodiment of the present invention. The flowchart includes the following steps:

[0038] Step 1. Jointly interpret the test data obtained by the three methods of lithology coring, static penetration penetration and micro-logging lithology calibration to obtain the best lithology stratification data; joint interpretation of micro-logging and small refraction test data , to get the optimal velocity layered data. Among them, the purpose of this step is to realize the joint interpretation of the near-surface survey data, obtain the best lithology stratification data and velocity stratification data, and provide basic data for establishing a consistent near-surface model.

[0039] Step 2. Write a data conversion interface program to realize the loading of multi-attribute dat...

Embodiment 2

[0045] According to the method provided in Embodiment 1, this embodiment provides a specific example of point-by-point excitation well depth design based on a multivariate parameter consistent near-surface model established in the Wacheng area of ​​the Shengli exploration area. Such as figure 2 Shown is the schematic diagram of the established fine near-surface model based on small refraction, micro-logging, velocity, and lithology constraints. Figure a is the lithology horizon model established using lithology interpretation data, figure b is the lithology data volume model established using lithology interpretation data, and figure c is the combination of lithology data and micro-logging and small refraction data The comprehensive model established by the interpretation results, Figure d is the comparison chart of lithology data, micro-logging and small refraction data, from figure 2 As can be seen in the figure, the near-surface model established by the joint interpretat...

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Abstract

The invention discloses a point-by-point excitation well depth designing method based on a uniform near-surface model. The method comprises the following steps of: A. obtaining optimum lithological hierarchical data and optimum speed hierarchical data by combining interpretation; B. programming a data conversion interface program and loading multiple attribute data; C. establishing a comprehensive and uniform near-surface model according to the lithological hierarchical data and the optimum speed hierarchical data obtained after combining interpretation, data of the submersible surface and submersible well, speed data and absorption attenuation A values; D. carrying out point-by-point excitation well depth designing and static correction value calculation on the uniform near-surface model; and E. loading the generated excitation well depth dispersive point data into the system again to generate a contour map in a CGM (Computer Graphic Metafile)format, marking a position by using a small rectangular patters, displaying the depth value of the point, and plotting the processed result map by using a plotter. The invention can optimize the excitation well depth design, enhance the signal-to-noise ratio of the earthquake collecting single-shot record, and greatly improve the information quality.

Description

technical field [0001] The invention discloses a petroleum seismic exploration technology, in particular a point-by-point excitation well depth design method based on a consistent near-surface model. Background technique [0002] In petroleum seismic exploration, the near-surface model is a very important basic data. Especially in seismic acquisition, considering the absorption and attenuation of seismic waves, it is necessary to enter the high-velocity layer for excitation. At the same time, the best excitation lithology should be ensured to improve the signal-to-noise ratio of single-shot records and greatly improve the accuracy of seismic data. quality. Although there are many near-surface survey methods, there is no comprehensive analysis method for these data, so it is impossible to establish a consistent near-surface model based on multi-attribute constraints such as depth, velocity, lithology, and absorption attenuation Q value. [0003] The general design method of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/40G01V1/28
Inventor 杨晶张光德段卫星刘斌徐维秀罗英伟任宏沁
Owner CHINA PETROCHEMICAL CORP
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