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A logging modeling method and system based on edge-keeping

A modeling method and logging technology, applied in the field of petroleum geophysical exploration, can solve the problems of error, unfavorable thin layer fine division and modeling, flattening data amplitude, etc., and achieve the effect of logging layering and modeling reasonably

Active Publication Date: 2018-08-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because the logging curve has the characteristics of "high frequency" jitter, some errors will be generated by direct sampling or sampling after smoothing. At the same time, when the subsurface medium is thin and interbedded, the standard smoothing will flatten the amplitude of the data on both sides, and Not conducive to the fine division and modeling of thin layers

Method used

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  • A logging modeling method and system based on edge-keeping
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  • A logging modeling method and system based on edge-keeping

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Embodiment 1

[0029] Conventional logging stratification and modeling methods are based on direct sampling of logging curves or stratification after standard smoothing. In order to improve the accuracy of logging stratification and modeling, the present invention implements a logging modeling method based on maintaining edges, which can improve the reliability and accuracy of logging stratification and modeling. In this method, edge-keeping processing is performed on well logging curves firstly, and then 1D modeling is carried out according to the processed well logging curves, so as to realize high-precision modeling based on well logging curves.

[0030] figure 1 It is a schematic flow chart of the logging modeling method based on edge-keeping in the embodiment of the present application. Refer below figure 1 Each step of this method will be described in detail.

[0031] In step S110, the well log curve is input, and the thickness of the thinnest layer of the well log is obtained accor...

Embodiment 2

[0057] Figure 4 It is a schematic structural diagram of a logging modeling system based on edge-keeping in an embodiment of the present invention, and the following refers to Figure 4 To illustrate the various components of the system.

[0058] In this embodiment, the logging modeling system includes the following parts: a thickness acquisition module 41 , an edge maintenance processing module 42 and a modeling module 43 . Wherein, the thickness acquiring module 41 is connected with the edge keeping processing module 42 , and the edge keeping processing module 42 is connected with the modeling module 43 .

[0059] Please refer to Figure 4 , when modeling the well logging curve, the thickness acquiring module 41, the edge keeping processing module 42 and the modeling module 43 of the present embodiment respectively perform the operations of step 110, step 120 and step 130 of the first embodiment, which are not described herein Then explain in detail.

[0060] Those skill...

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Abstract

The invention discloses a method and system for modeling well logging based on edge preservation. The method includes the following steps: inputting a well logging curve, based on the result of the well logging explanation, acquiring the thickness of the thinnest layer of the well log; based on thickness of the thinnest layer acquired from the result of the well logging explanation, selecting the length of a sliding window, conducting edge preservation processing on the well logging curve; and based on the thickness of the thinnest layer acquired from the result of the well logging explanation, establishing a 1D model of the well logging curve after the edge preservation. The method pre-processes the well logging curve by using the edge preservation algorithm, which smoothes the well logging curve and preserves the edge of the horizon. The method selects the best sliding window based on the thickness of the thinnest layer of the well logging explanation, such that the well logging stratum and modeling is more reasonable and accurate.

Description

technical field [0001] The invention belongs to the technical field of petroleum geophysical exploration, in particular to a logging modeling method and system based on edge-keeping. Background technique [0002] Conventional well logging modeling method is to carry out direct sampling or standard smoothing according to the measured curve of well logging and then stratify and model. Because the logging curve has the characteristics of "high frequency" jitter, some errors will be generated by direct sampling or sampling after smoothing. At the same time, when the subsurface medium is thin and interbedded, the standard smoothing will flatten the amplitude of the data on both sides, and It is not conducive to the fine division and modeling of thin layers. [0003] In view of the "high frequency" jitter of well logging curves and the development of thin interbeds underground, it is necessary to provide a method to improve the accuracy of well logging stratification and modeling...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/40G06F19/00
Inventor 许凯王世星肖鹏飞曹辉兰
Owner CHINA PETROLEUM & CHEM CORP