3D Hydrocarbon Migration Channel Characterization with Fault Integration
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Solution Overview
Problem
Current hydrocarbon secondary migration channel characterization methods are limited to two-dimensional analysis, neglecting three-dimensional spatial information and the influence of hydrocarbon migration in multiple directions, which hampers accurate petroleum accumulation positioning and development.
Innovation Solution
A three-dimensional characterization method involving lithofacies seismic inversion, grid division, fault integration, and zigzag connectivity judgment to construct a target geological model, determining hydrocarbon migration channels and reservoirs based on lithofacies attributes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a two-dimensional characterization method is used for hydrocarbon secondary migration channel, then the analysis process is simple, but the characterization precision is insufficient and three-dimensional spatial information is lost
Solution Approach 1:
The patent transitions from two-dimensional planar analysis to three-dimensional geological model analysis by introducing vertical migration channels and lateral migration channels. The three-dimensional model integrates fault data, lithofacies attributes, and sand body distribution across multiple layers, enabling comprehensive characterization of hydrocarbon migration pathways in both vertical and lateral directions simultaneously.
2Power
If a two-dimensional model is used to simulate hydrocarbon migration, then the simulation is computationally efficient, but it cannot capture vertical and lateral migration influences comprehensively
Solution Approach 1:
The three-dimensional geological model is divided into multiple grid cells organized in layers, with each grid containing lithofacies attributes. The model segments migration pathways into vertical migration channels and lateral migration channels, allowing independent analysis and simulation of different migration directions while maintaining overall three-dimensional spatial relationships.
3Manufacturing precision
If lithofacies attribute determination and updating is performed on planar and sectional data, then the geological model accuracy is improved, but the processing time increases
Solution Approach 1:
The patent performs lithofacies attribute determination and updating operations in advance on both planar data and sectional data before final model integration. By pre-processing these attributes and storing them in the three-dimensional grid structure, the system avoids repeated computational operations during subsequent analysis, reducing overall processing time while maintaining high model accuracy.
Data Source
AI summary
A three-dimensional characterization method of a hydrocarbon secondary migration channel includes: step 1, collecting lithofacies seismic inversion data of a research area, and constructing a three-dimensional geological model including mudstone and sandstone; step 2, performing lithofacies attribute determination and updating on planar mudstone data; step 3, performing lithofacies attribute determination and updating on sectional mudstone data; step 4, adding fault data and updating lithofacies attributes according to an intersection relationship between a sand body distribution area and the fault to obtain a model intersecting with the fault and a model without intersecting with the fault; step 5, performing a zigzag connectivity judgment on a sand body distribution area to obtain a judgment result, and updating lithofacies attributes according to the judgment result; step 6, obtaining a target three-dimensional geological model; and step 7, determining the hydrocarbon secondary migration channel.