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Layer speed calculating and average speed field establishing method based on position control

A technology of average velocity and horizon control, applied in the field of petroleum exploration, which can solve the problems of large deformation of deep-turning data, far from expected differences, irregular velocity values, etc., and achieves the effect of high reliability.

Inactive Publication Date: 2017-06-20
北京金双狐油气技术有限公司
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Problems solved by technology

This method has the following problems: For example, in places far away from the well, the velocity value is irregular, and the depth data is greatly deformed, which is far from the expected value.
This method has the following problems: lack of effective control, often in the parts where the velocity spectrum data is not reliable, the time-depth conversion effect is poor

Method used

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  • Layer speed calculating and average speed field establishing method based on position control
  • Layer speed calculating and average speed field establishing method based on position control
  • Layer speed calculating and average speed field establishing method based on position control

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Embodiment Construction

[0049] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0050] Such as figure 1 and figure 2 As shown, the method for calculating the velocity and establishing the average velocity field in the layer control of the embodiment of the present invention includes the following steps:

[0051] Step S1, acquiring work area velocity spectrum data, time-controlled layer data and well data.

[0052] Wherein, the time control layer data includes: time surface data of the control layer; the well data includes: time and depth data of the well.

[0053] Step S2, calculating the layer velocity ...

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Abstract

The invention provides a layer speed calculating and average speed field establishing method based on position control. The method comprises that work-area speed spectrum data, time control layer data and well data are obtained; speeds of different layers are calculated according to the work-area speed spectrum data and the time control layer data; 2D gridding is carried out on scatter data of the speeds of the different layers; according to the scatter data of the layer speeds after 2D gridding and the time control layer data, spatial average speed scatter data is generated; 3D gridding is carried out on the spatial average speed scatter data, and a 3D average speed field is generated; and space correction is carried out on the 3D average speed field according to the well data, and a corrected average speed field is obtained. The generated average speed field is more reasonable than depth data, and approaches an expected object more.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration, in particular to a method for obtaining layer velocity and establishing an average velocity field by layer control. Background technique [0002] In petroleum geophysical seismic exploration, the data collected in the work area is in the time domain. To convert time domain data into depth domain, an accurate and reliable average velocity field is needed. [0003] Currently, there are two mainstream seismic exploration software: [0004] (1) Use the time-depth data of existing wells in the work area, convert it into a time-velocity curve, and then mathematically interpolate it into the average velocity of the whole area. This method has the following problems: For example, in places far away from the well, the velocity value is irregular, and the depth data is greatly deformed, which is far from the expected value. [0005] (2) Use the superimposed velocity spectrum data, convert ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/32G01V1/36
CPCG01V1/325G01V1/362G01V2210/6169G01V2210/6222G01V2210/74
Inventor 周国强杨锐明
Owner 北京金双狐油气技术有限公司
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