Three-dimensional geological model building method of high-steep structure

Abstract

The invention discloses a three-dimensional geological model building method of a high-steep structure, and belongs to the field of geological engineering. The method includes the steps: acquiring ground surface inclination information and formation lithology information of a target work area, and sectionally building a plurality of ground surface geological models according to geological change; building a three-dimensional ground surface model by the aid of the ground surface geological models; performing well logging in the target work area and acquiring underground inclination information and underground layering information for building a near-well structure model; analyzing a seismic reflection profile of the target work area and describing a detachment structure system in the target work area; building a two-dimensional fundamental geological model by the aid of the three-dimensional ground surface model, the near-well structure model and the detachment structure system; building a three-dimensional geological model according to the two-dimensional fundamental geological model. The three-dimensional geological model building method effectively solves the problem of poor seismic reflection imaging of the high-steep structure due to steep angle formation development and structural deformation complexity, high precision of the three-dimensional geological model for the high-steep structure is ensured, and structural trap is more practicable.

Description

technical field [0001] The invention relates to the field of geological engineering, in particular to a method for building a three-dimensional geological model of high and steep structures. Background technique [0002] In the process of oil and gas exploration wells, the formation structure in the oil area is usually modeled to construct a geological model, and then provide an exploration basis for oil and gas production. Therefore, it is very necessary to provide a method for constructing a three-dimensional geological model. [0003] At present, there are related three-dimensional geological model construction methods for different strata. For example, the prior art provides a construction method of the geological structure model of the complex piedmont structural belt (patent application number: 201420257316.4), which includes A type of single structural model composed of four blocks: front overstripping zone, front thrust zone, quasi-in situ superposition system and a...

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Problems solved by technology

[0005] High and steep structures are geologically rich in oil and gas. However, due to the development of strata with steep dip angles and complex structural de

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