CO2 Storage Potential Evaluation Under Heterogeneous Formations
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Solution Overview
Problem
Current carbon storage capacity calculations in heterogeneous geological formations are inaccurate due to ignoring the complex heterogeneity within formations, leading to increased uncertainty in CO2 storage potential evaluation.
Innovation Solution
A method involving heterogeneity modeling based on geological data at different depths, using one-dimensional grid models and simulation tools like TOUGHREACT, to integrate CO2 storage capacities and identify a main control factor affecting storage capacity, thereby accurately determining formations with potential for CO2 storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If average property-based calculation methods are used, then the calculation process is simple, but the accuracy of CO2 storage potential evaluation deteriorates due to ignoring formation heterogeneity
Solution Approach 1:
The formation is divided into multiple depth intervals, with each interval treated as a separate modeling unit. This segmentation allows the complex heterogeneous formation to be analyzed in manageable layers, where each layer's properties are explicitly modeled rather than averaged, thereby improving evaluation accuracy while maintaining computational feasibility
Solution Approach 2:
The patent applies different geological parameters and properties to different depth intervals based on their specific local characteristics. Each depth interval is assigned its own set of formation properties (porosity, permeability, mineral composition) rather than using uniform average values, allowing the model to capture local heterogeneity and improve overall evaluation accuracy
2Measurement precision
If heterogeneous formation properties are considered in detail, then the accuracy of CO2 storage potential evaluation is improved, but the complexity of the calculation model increases
Solution Approach 1:
The complex heterogeneous formation is segmented into multiple depth intervals, where each interval is modeled independently with its own properties. This segmentation reduces the overall model complexity by breaking down the complex system into simpler, manageable units that can be analyzed and calculated separately
Solution Approach 2:
The patent transitions from two-dimensional average property calculations to three-dimensional depth-interval-specific modeling. By adding the depth dimension and creating separate models for each depth interval, the system captures vertical heterogeneity without overwhelming complexity, as each depth interval can be modeled using standard one-dimensional formation evaluation methods
Data Source
AI summary
There is a method for evaluating CO2 storage potential under a heterogeneous geological condition. The method has the steps of acquiring a plurality pieces of geological data at different depths for any location in a study area; performing heterogeneity modeling according to the plurality pieces of geological data and CO2 injection conditions to obtain one-dimensional grid models respectively corresponding to a plurality of the different depths; obtaining, based on the one-dimensional grid models, CO2 storage capacities at the plurality of different depths through simulation; integrating the CO2 storage capacities and fitting the plurality pieces of geological data to obtain a main control factor affecting the CO2 storage capacity; and performing analysis based on the main control factor and determining a formation affected by the main control factor as a formation with CO2 storage potential. There is also an apparatus and a computer device