Bulk-Blend Cement Slurry Formulation for Predictable Fluid Loss
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Solution Overview
Problem
The current methodology for controlling fluid loss in cement slurries is inefficient and leads to increased complexity, as it relies on a trial-and-error approach, resulting in cement slurries with suboptimal fluid loss control additives.
Innovation Solution
A model-based approach using a cement slurry fluid loss model that maps composition and testing conditions to predict API fluid loss, accounting for bulk blend components and temperature effects, allowing for the design of cement slurries with targeted fluid loss values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a trial-and-error methodology is used to control fluid loss in cement slurries, then fluid loss control can be achieved, but the process becomes inefficient and leads to increased complexity in slurry design
Solution Approach 1:
The patent applies parameter changes by using a fluid loss model that incorporates bulk blend parameters (such as cement type, water-to-cement ratio, and additive concentrations) to predict fluid loss behavior. This allows the design process to transition from trial-and-error to a systematic approach where parameters are optimized based on model predictions, thereby reducing design complexity while maintaining reliable fluid loss control
Solution Approach 2:
The patent replaces the mechanical trial-and-error methodology with a computational fluid loss model. Instead of physically preparing and testing multiple slurry batches, the system uses mathematical modeling and calculations to predict fluid loss and guide slurry design, substituting physical experimentation with computational analysis
2Reliability
If iterative slurry design is performed to meet fluid loss requirements, then fluid loss control is improved, but the time and resources required for testing increase
Solution Approach 1:
The patent applies preliminary action by using the fluid loss model to predict and optimize slurry composition before actual slurry preparation and testing. The model allows designers to pre-determine the appropriate concentrations of fluid loss control additives and bulk blend parameters, eliminating the need for multiple iterative testing cycles and significantly reducing the time required to develop a compliant slurry formulation
Solution Approach 2:
The patent creates a virtual model (computational fluid loss model) that replicates the behavior of physical cement slurries. This digital copy allows for extensive testing and optimization in silico, replacing the need for repeated physical experiments and reducing the time and resources required for iterative design
3Reliability
If higher concentrations of fluid loss control additives are used, then fluid loss is reduced, but the complexity and cost of the cement slurry formulation increases
Solution Approach 1:
The patent uses parameter changes to optimize the concentration of fluid loss control additives by incorporating additive concentration as a variable in the fluid loss model. The model identifies the minimum effective concentration required to achieve target fluid loss values, allowing for reduced additive usage while maintaining performance, thereby simplifying the formulation and reducing costs
Data Source
AI summary
A method may include providing a fluid loss model, providing a fluid loss requirement, generating a cement slurry recipe using the fluid loss model and the fluid loss requirement such that a calculated fluid loss of the cement slurry recipe using the fluid loss model meets or exceeds the fluid loss requirement; and preparing a cement slurry based on the cement slurry recipe.