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Method and device for determining geologic feather parameters and distribution of hole seam type reservoir stratum

A measurement method and technology of geological characteristics, applied in the field of measurement and installation of geological characteristic parameters and distribution of cavern-fractured reservoirs, can solve problems such as low efficiency, analysis data differences, and failure to meet the work needs of geological researchers. , to achieve the effect of improving work efficiency, good research and forecasting

Active Publication Date: 2013-09-04
PETROCHINA CO LTD
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Problems solved by technology

[0003] However, in the traditional fracture analysis technology on the surface of carbonate rock cores, manual work is often used to describe the fracture characteristic area, which is inefficient.
Moreover, due to different analysts, there are varying degrees of variance in the analyzed data
In today's era of technological information development, it cannot meet the work needs of geological researchers

Method used

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  • Method and device for determining geologic feather parameters and distribution of hole seam type reservoir stratum
  • Method and device for determining geologic feather parameters and distribution of hole seam type reservoir stratum
  • Method and device for determining geologic feather parameters and distribution of hole seam type reservoir stratum

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no. 1 approach

[0031] figure 1 A flow chart showing a method for measuring geological characteristic parameters of a cave-and-fracture reservoir according to the first embodiment of the present invention.

[0032] Such as figure 1 As shown, in step ST102, based on a predetermined segmentation threshold, the core image of the cavern-fractured reservoir is segmented into a foreground area and a background area.

[0033] As an example, the entire core image is segmented using the same segmentation threshold. This is suitable for images where there is a sharp contrast between the background and foreground areas. Wherein, the segmentation threshold is acquired through the histogram of the core image, or may be pre-stored based on previously acquired core images. Preferably, the core image is segmented by the following formula.

[0034]

[0035] figure 2 Examples of core images before and after segmentation are shown. exist figure 2 Middle (A) is the core image before segmentation, (B)...

no. 2 approach ）

[0160] Figure 13 A flow chart showing a method for measuring geological characteristic parameters of a cave-type reservoir according to a second embodiment of the present invention, Figure 14 A device for measuring geological characteristic parameters of a cave-and-fracture reservoir according to the second embodiment of the present invention is shown.

[0161] Refer below Figure 13 and Figure 14 A method for measuring geological characteristic parameters of a fractured reservoir and a measuring device 100 according to the second embodiment of the present invention will be described.

[0162] The measurement device 100 according to the first embodiment of the present invention includes a segmentation unit 112, an extraction unit 114, a region adjustment unit 116, a calculation unit 118, a preprocessing unit 110, a denoising unit 120, a region edge smoothing unit 122, and a crack feature adjustment unit 124 .

[0163] In steps ST102, ST104, ST106 and ST108 of the method...

no. 3 approach ）

[0214] Figure 16 A flow chart showing a method for predicting the distribution of cave-and-fracture reservoirs according to an embodiment of the present invention.

[0215] In step ST402, a core image is obtained from at least one position of the cave-fracture reservoir, such as figure 2 The image shown in (A).

[0216] In step ST404, for each of the acquired core images, the method for measuring geological characteristic parameters of fractured reservoirs according to the first embodiment of the present invention is used to obtain geological characteristic parameters at positions corresponding to the core images.

[0217] In step ST406, based on the geological characteristic parameters at at least one location of the cave-and-fracture reservoir, the distribution of the cave-and-fracture reservoir is predicted. The distribution of the cavernous reservoir can be predicted based on geological characteristic parameters at at least one location of the cavernous reservoir using...

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Abstract

The invention relates to a method and a device for determining geologic feather parameters and distribution of a hole seam type reservoir stratum. The method for determining the geologic feather parameters of the hole seam type reservoir stratum comprises the following steps of a dividing step: dividing core images of the hole seam type reservoir stratum into foreground regions and background regions basing on preset dividing threshold values; an extracting step: extracting the foreground regions from the divided core images to be used as crack feather regions; a region adjusting step: carrying out region adjusting on the crack feather regions through at least one way of region expansion, region corrosion and region refinement by aiming at each crack feather region; and a calculating step: calculating the geologic feather parameters of the hole seam type reservoir stratum according to the extracted crack feather regions.

Description

technical field [0001] The invention relates to a method and a measuring device for measuring geological characteristic parameters of cave-and-fracture reservoirs used in petroleum geological exploration, as well as a method and system for predicting the distribution of cave-and-fracture reservoirs. Background technique [0002] At present, in petroleum geological exploration, through the analysis of geological characteristics of traditional cave-fractured reservoirs, especially the analysis of fractures on the surface of carbonate rock cores, a large amount of intuitive information can be provided for qualitative analysis of formations, and can be obtained from the exploration site. The geological characteristic parameters are extracted from the core image of the cave-fracture reservoir for quantitative analysis of the reservoir. [0003] However, in the traditional fracture analysis technology on the surface of carbonate rock cores, manual work is often used to describe th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V9/00
Inventor 王招明肖承文王贵文田军杨海军郭秀丽袁仕俊范文同年涛祁新中信毅
Owner PETROCHINA CO LTD
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