Modeling method of three-dimensional formation corner mesh voxel based on forward modeling

Abstract

The present invention provides a three-dimensional formation corner grid voxel modeling method based on forward modeling, comprising: step 1, data loading and visualization of the original data required for three-dimensional geological modeling; step 2, correction through the formation interface The method restores the strata to the paleo-sedimentary state in the period when no tectonic activity occurred; Step 3, uses the corner point grid data model to divide the stratum into grids; Step 4, performs interpolation and fitting of fault planes; Step 5, uses the acquired Fault information cutting during the tectonic movement period to adjust the corner grid voxel model of the paleo-sedimentary period. The 3D formation corner grid voxel modeling method based on forward modeling can eliminate the distortion of the geological grid during the modeling process, preserve the volume and distance information of the simulated target, make the geological grid faithful to complex strata, and accurately Statistics are realized, physical parameters are effectively integrated with the 3D geological grid, and the model is more in line with geological laws.

Description

technical field [0001] The invention relates to the technical field of three-dimensional structure modeling of oil and gas, in particular to a three-dimensional stratum corner point grid voxel modeling method based on forward modeling. Background technique [0002] Currently popular oil and gas 3D geological modeling software (Petrel, Direct, etc.) at home and abroad, in the process of PillarGridding gridding for structural modeling, faults are forcibly bound to the planar quadrilateral grid, that is, the grid points near the fault line are moved to On the fault line, some of the grid edges become fault edges, which requires the grid to be parallel to the fault, and the grid cannot be cut by the fault, so the 3D geological grid generated during the modeling process will be generated Distortion leads to distorted facies simulation results, and physical parameters such as reservoirs cannot be effectively integrated with distorted grids. For this reason, we invented a new 3D f...

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Problems solved by technology

[0002] Currently popular oil and gas 3D geological modeling software (Petrel, Direct, etc.) at home and abroad, in the process of PillarGridding gridding for structural modeling, faults are forcibly bound to the planar quadrilateral grid, that is, the grid points near the fault line are moved to On the fault line, make some of the grid edges become fault edges, which requires the grid to be parallel to the fault, and the grid cannot be cut by the fault, so the 3D geological grid generated during the modeling process will be generated Distortion, resulting in distorted facies simulation results, and physical parameters such as reservoirs cannot be effectively integrated with the distorted grid

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