A two-dimensional closed geological structure model building method

Abstract

A method for setting up model of two ¿C dimensional closed geological structure includes using dot, section, line and face to define layer boundary and fault boundary of geological structure, using two ¿C dimensional mode to present a series of closed face with the same layer attribute. The model prepared by the method can be used to describe various complicated geological structure such as normal fault, reversed fault, thin ¿C out structure, etc.

Description

[0001] Involved areas [0002] The invention relates to the field of petroleum geophysical exploration, and relates to a method for establishing a two-dimensional geological numerical model. Background technique [0003] In general, subsurface formations are layered structures formed by sedimentation. After multiple tectonic movements, various deformations occurred in the strata, and different types of faults cut the strata, resulting in complex and diverse underground strata structures. Common stratigraphic structures include normal faults, reverse faults, pinch-outs, and intrusions. [0004] Usually, the layered structure modeling method is used to describe the geological structure model. The description of the stratigraphic interface requires writing a continuous interface from the left boundary to the right boundary. In addition, the interface function is required to be a single-valued function of variables, and no inflection phenomenon is allowed at the formation level...

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Problems solved by technology

[0005] When the geological structure is very complex, it is difficult or even impossible to accurately describe the geological model with the above-mentioned layered structure modeling method

For example, in western China, the geological structure is complex and faults are developed. Traditional modeling methods cannot meet the actual needs, which limits the wide application of model forward modeling technology.

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