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Method utilizing trend surface form to generate error correction surface

A technology of error correction and trend surface, applied in seismology for logging records, etc., can solve the problems of no geological significance and failure to reach geologists, etc., and achieve easy acquisition of basic data, reasonable values, and good results Effect

Active Publication Date: 2018-05-18
北京金双狐油气技术有限公司
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Problems solved by technology

In places where there is no well data control, due to the existence of multiple solutions, there is no geological significance, and the correction surface generated by mathematical algorithms alone cannot meet the needs of geologists

Method used

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  • Method utilizing trend surface form to generate error correction surface
  • Method utilizing trend surface form to generate error correction surface
  • Method utilizing trend surface form to generate error correction surface

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Embodiment Construction

[0036] 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.

[0037] Such as image 3 with Figure 4 As shown, the method for generating an error correction surface using a trend surface form in an embodiment of the present invention includes the following steps:

[0038] Step S1, get the well point correction value W of each well i , get the correction value set {W 1 , W 2 ,...,W n} and geological trend surface, where n means that there are n wells, the same below.

[0039] In one embodiment of the present invention, the well point correction value W of each well i ,Such as figure ...

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Abstract

The invention provides a method utilizing a trend surface form to generate an error correction surface. The method comprises steps that a well point correction value and the geological trend surface of each well are acquired; a trend surface value of the geological trend surface is calculated, and the corresponding relationship between the well point correction value and the trend surface value isestablished; a crossplot of the well point correction value and the trend surface value of each well is made, curve fitting is carried out, and fitting of a polynomial trend line is carried out to acquire a fitting polynomial; an initial correction surface is generated according to the polynomial acquired through fitting; error points of the initial correction surface are routinely gridded to generate residual errors, and residual error correction is realized; the residual error correction result is added to the initial correction surface to generate a final correction surface. The method isadvantaged in that the geological trend surface is added as the constraint, the new geological basis can be realized at the area without well control, the generated result is closer to geological expectation, and the method meets actual needs of producers.

Description

technical field [0001] The invention relates to the technical field of petroleum geologic mapping, in particular to a method for generating an error correction surface by utilizing the form of a trend surface. Background technique [0002] In petroleum geological production, the structural contour map needs to be corrected by drilling data. The method is to use the error at the well point to generate an error correction surface, and then use this surface to correct the original structural map to obtain a structural map consistent with the drilling data. [0003] At present, the main method is to directly mesh the well points to generate a surface, and then use it for correction. There are some unreasonable places to use this method. as follows figure 1 As shown, the left side of the figure is the distribution position map of error points, and the right side of the figure is the error correction amount surface obtained by the mainstream method. In places where there is no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/40
CPCG01V1/40
Inventor 王朝旭杨锐明
Owner 北京金双狐油气技术有限公司
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