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Method for dividing stratum structures of mining area

A technology of geological structure and strata, applied in the field of geological exploration, can solve the problems of inability to accurately find mineral deposits, disappearance, and local rock formation defects, and achieve the effect of avoiding the phenomenon of time penetration.

Inactive Publication Date: 2012-09-19
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, for the geological structure of sedimentary strata, especially the geological structure of alluvial facies, the stratigraphic structure changes rapidly, which will cause local area rock defects, fractures or even disappear.
In this case, when using the equal-thickness division method to divide this sedimentary strata, it will cause serious time-travel phenomenon, so it is impossible to accurately find out the mineral deposits in the geological structure of the sedimentary strata, that is, the sedimentary deposits

Method used

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  • Method for dividing stratum structures of mining area
  • Method for dividing stratum structures of mining area
  • Method for dividing stratum structures of mining area

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Such as figure 1 As shown, the stratum structure division method of the mining area, the stratum of the mining area is a sedimentary mineral deposit geological structure, comprising the following steps:

[0046] 101) Drill multiple wells in the mining area, extract core samples from each well and obtain well logs;

[0047] 102) According to the geological structure and sedimentary background, the mining area is divided into multiple sub-areas;

[0048] 103) Analyze the extracted core samples and logging curves according to the sequence cycle standard based on the principle of sequence stratigraphy, divide the stratum structure of the well from which the core samples were extracted, and determine the marker layers and markers Boundary markers between layers;

[0049] 104) Determine the standard wells in each sub-area, and use the stratum structure of the standard wells in each sub-area as the stratum structure of the sub-area;

[0050] 105) Unify the formation structu...

Embodiment 2

[0054] Such as figure 2 As shown, the stratum structure division method of the mining area, the stratum of the mining area is a sedimentary mineral deposit geological structure, comprising the following steps:

[0055] 201) Drill multiple wells in the mining area, extract core samples from each well and obtain well logging curves using mud logging methods and logging methods;

[0056] 202) According to the geological structure and sedimentary background, the mining area is divided into multiple sub-areas;

[0057] 203) Analyze the extracted core samples and well logging curves according to the sequence cycle standard based on the principle of sequence stratigraphy, divide the stratum structure of the well from which the core samples were extracted into multi-level sequences, and determine the Marker layers between each sequence in the same upper-level sequence and boundary marks between each marker layer;

[0058] 204) Determine the standard wells in each sub-area, and use ...

Embodiment 3

[0066] Such as image 3 As shown, the stratum structure division method of the mining area, the stratum of the mining area is a sedimentary mineral deposit geological structure, comprising the following steps:

[0067] 301) Drill multiple wells in the mining area, extract core samples and obtain well logs from each well;

[0068] 302) Divide the mining area into multiple sub-areas according to the geological structure and sedimentary background;

[0069] 303) Analyze the extracted core samples and well logging curves according to the sequence cycle standard based on the principle of sequence stratigraphy, divide the stratum structure of the wells from which the core samples were extracted, and classify the wells with obvious logging curve characteristics The formation is determined as a marker layer, and the boundary marks between each marker layer are determined;

[0070] 304) Determine the standard wells in each sub-area, and use the stratum structure of the standard wells...

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Abstract

The invention relates to the field of geological exploration, in particular to a method for dividing stratum structures of a mining area. The method comprises the following steps of drilling multiple wells in the mining area, extracting a core sample from each well and acquiring a logging curve; dividing the mining area into multiple subareas according to a geological structure and depositional setting; analyzing the extracted core samples and the logging curve according to sequence cycle standard in a sequence stratigraphy principle, classifying the stratum structures of the wells from which the core samples are extracted, and determining a marker bed and a boundary mark among the marker beds; determining a standard well in each subarea, and adopting the stratum structure of the standard well in each subarea as the stratum structure of the subarea; unifying the stratum structures of all standard wells; and integrating the stratum structure of each subarea, and establishing a stratum structure layout chart of the entire mining area. The core samples are analyzed by utilizing the sequence cycle standard, so that the stratum structures are more reasonable to divide, and the diachronous phenomenon is avoided.

Description

technical field [0001] The invention relates to the field of geological exploration, in particular to a stratum structure division method in a mining area. Background technique [0002] The same sedimentary rock layer, due to the different geographical location, source supply and depositional environment, often has lithological changes in the lateral direction, and this phenomenon is called lateral change. Conversely, rock formations of the same lithology, or possibly not of the same period, span different geological ages. [0003] The existing stratum structure division methods in mining areas are generally divided by the equal thickness division method. The equal-thickness division method means that the stratum is formed as a whole and changes very slowly, so it is believed that the lateral changes in the sedimentary strata in a short historical period are very small and can be ignored, so each stratum should be equal in thickness in this area . And based on this theory...

Claims

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Application Information

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IPC IPC(8): G01V1/40E21B47/00
Inventor 张海英姜在兴
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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