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Block model building method for complex geological structure

A technology of complex geology and construction methods, applied in the field of block model construction, to achieve the effect of simple construction methods, small amount of calculation, and great application value

Inactive Publication Date: 2009-11-18
BC P INC CHINA NAT PETROLEUM CORP
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Problems solved by technology

[0007] In order to solve the above technical problems, the present invention proposes a block model construction method suitable for complex geological structures. The present invention completely solves the problem of 3D model input and block formation in complex geological areas, without the need to solve difficult and computationally intensive problems. Equations, while the construction method is simple and practical

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  • Block model building method for complex geological structure

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Embodiment Construction

[0051] 1. Data preparation

[0052] For the data structure of the block structure model of complex geological structure, the concepts of point, triangle, surface, subsurface and block can be cited for description, and the meanings are as follows:

[0053] Point P(x, y, z): Refers to the control point of the horizon and fault plane morphology, or the intersection point of the horizon plane, fault plane and the model boundary, where x, y are plane coordinates, and z is the vertical coordinate. Points are the basic data describing the morphology of layer planes and fault planes. In practice, interpolation can be performed on this basic control point as needed to form new control points, which is more conducive to describing the horizon and fault plane.

[0054] Triangle T(x, y, z): A triangle formed by connecting three adjacent points on the layer plane or fault plane, and it is not allowed to cross the layer plane and fault plane. The basic principles that should be followed w...

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Abstract

The invention discloses a block model building method for complex geological structure, and relates to the geological field of three-dimension modeling comprising the following steps: a, triangular meshing description is carried out on planes or fault planes; b, after step a, level intersection in block modeling for complex geological structure is converted into triangle intersection in space, whether the two triangles are intersected is judged, points of intersection are found from the two intersected triangles, and a line of intersection is obtained by connecting the points of intersection; c, geometric consistency and topological consistency are carried out on inside of each intersected triangle; d, after step c, enclosing block is extracted to obtain an interface formed by peripheral sides of the enclosing block, and is defined geological attribute to form three dimension model block. The method in the invention completely solves the problems of three dimension model input and blocking in complex geological regions, avoids using equations set with high solving difficulty and calculated amount, and is simple and practical.

Description

technical field [0001] The invention relates to the technical field of geological three-dimensional modeling methods, in particular to a block model construction method suitable for complex geological structures. Background technique [0002] With the increasing complexity of 3D seismic exploration objects, the maturity of acquisition, processing and interpretation methods, and the increasingly important role of computers in 3D seismic exploration, there is an urgent need for a convenient method that can integrate geologists The complex three-dimensional geological model in the computer is input into the computer, so that the computer can recognize and recognize the complex three-dimensional geological model in the geologist's mind, and at the same time provide model input for various forward modeling methods. [0003] The traditional horizon geological model cannot accurately describe the 3D complex geological model, and the conversion from the horizon model to the block mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/50G06T15/00G06T17/05
CPCG06T17/05G06T17/20G01V20/00
Inventor 陶正喜鲁才刘鸿朱晨敬龙江李振
Owner BC P INC CHINA NAT PETROLEUM CORP
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