A Subdivision Method of Natural Grid in Geological Section

A technology of geological profiles and grids, applied in instrumentation, calculation, image data processing, etc., can solve problems such as characterization

Active Publication Date: 2020-02-14
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, none of the above meshing methods can well describe the channel connectivity of faults, fractures, and unconformities.

Method used

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  • A Subdivision Method of Natural Grid in Geological Section
  • A Subdivision Method of Natural Grid in Geological Section
  • A Subdivision Method of Natural Grid in Geological Section

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Experimental program
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Embodiment 1

[0049] This embodiment provides a method for subdividing a natural grid of a geological section, and the subdivision method is actually applied to a research area to establish a natural grid of a geological section. The basic geological conditions of the study area are: a geological section with a length of 10,000 meters and a depth of 2,000 meters, including 4 strata (that is, 4 stratigraphic boundaries, the first of which is a stratum unconformity line, and the rest are stratum integration lines), 3 strata Fault lines and 6 crack lines. Specifically, the geological section natural grid generation method adopted in this embodiment includes the following steps (see flow chart figure 1 ):

[0050] (1) Forming natural grid graphics of geological sections

[0051] A number of vertical lines are inserted on the geological section to intersect with the stratigraphic boundaries and fault lines to form a stratigraphic grid pattern in the natural form of the geological section; amon...

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Abstract

The invention provides a natural grid dissection method of a geological profile. The method comprises a stratum grid generation step and a step of forming side and point grids that reflecting communication relation among faults, cracks and unconformable channels on the basis of dissection of a stratum grid. The stratum grid is composed of enclosed first grid units which are positioned between stratum boundaries and fracture lines and formed by intersecting with manual inserted lines, the stratum boundaries comprise stratum conformable and unconformable contact lines, and the crack lines comprise the faults and cracks. The natural grid dissection method of the geological profile relies on specific natural grid form characteristics (reserving original forms of the faults, cracks and unconformable layers) of the side grids, characteristics of distribution and transmission capabilities of an oil gas transmission system are described in a better way, and significant means is provide for oil gas migration-accumulation simulation, oil gas contained system analysis and oil gas reservoir forming research.

Description

technical field [0001] The invention belongs to the technical field of analysis and simulation of oil and gas formations, and in particular relates to a method for subdividing natural grids of geological sections. Background technique [0002] The description and quantitative characterization of oil and gas migration and transport systems in geological sections are key technologies in the fields of oil and gas accumulation research, oil and gas system analysis, and basin simulation. important research tool. The natural grid generation method can maintain the original shape of the geological section to the greatest extent. The innovative edge grid technology of the natural grid generation method lays the foundation for fine simulation of oil and gas migration in faults, fractures and unconformity zones, thereby improving the distribution of oil and gas reservoirs. forecast level. [0003] Meshing methods for geology, topography and other fields, mainly including Delaunay tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/05G06T17/30
CPCG06T17/05G06T17/30
Inventor 郭秋麟陈宁生刘继丰
Owner PETROCHINA CO LTD
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