Emulsion Fines Migration Control Fluid
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for controlling small particle and fines migration in oilfield production are inefficient, often requiring multiple stages and are incompatible with brines, leading to equipment erosion and reduced well performance.
Innovation Solution
A single-stage treatment fluid comprising an emulsion with an oil phase containing calcium hydroxide and an aqueous phase with insoluble silica particles, which reacts to form a calcium silicate hydrate gel, effectively trapping and confining fines without additional treatment steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resin-based consolidating fluids are injected through the wellbore into the formation, then sand consolidation is achieved, but the treatment procedure becomes complicated and unreliable
Solution Approach 1:
The patent combines multiple treatment functions into a single fluid composition that can simultaneously consolidate sand and control fines migration. The consolidating fluid includes resin components, curing agents, and fines control agents all in one formulation, eliminating the need for multiple separate injection stages and reducing procedural complexity while maintaining consolidation reliability.
Solution Approach 2:
The consolidating fluid is designed to perform multiple functions simultaneously: consolidating unconsolidated sand, controlling fines migration, and providing screenless completion. This multi-functional approach simplifies the treatment procedure by eliminating the need for separate treatments for each function, thereby reducing complexity while maintaining reliability.
2Object-affected harmful factors
If gravel pack and metal screen are used to filter produced fluids, then sand production is reduced, but the system becomes prone to plugging and erosion
Solution Approach 1:
The patent removes the metal screen component from the completion system, replacing it with a screenless completion approach. The consolidating fluid treats the formation to consolidate sand in place, eliminating the need for mechanical screening. This extraction of the screen component eliminates the plugging and erosion issues associated with screens while maintaining sand control through chemical consolidation.
3Device complexity
If single-stage consolidation treatment is implemented, then treatment complexity is reduced, but fines migration control may be insufficient
Solution Approach 1:
The consolidating fluid combines sand consolidation agents and fines control agents into a single formulation. This allows both functions to be achieved in one treatment stage without requiring separate injection procedures, thereby reducing complexity while effectively controlling both sand consolidation and fines migration simultaneously.
Solution Approach 2:
The consolidating fluid is a composite material containing multiple active components: resin for consolidation, curing agent for hardening, and fines control agents such as clays or polymers. This composite formulation enables single-stage treatment to achieve both sand consolidation and fines migration control by integrating multiple functional materials into one fluid system.
4Reliability
If epoxy- or furan-based resins are used for consolidation, then sand control is effective, but chemical compatibility and mixing reliability become problematic
Solution Approach 1:
The patent combines the resin, curing agent, and fines control agents into a single pre-mixed consolidating fluid composition. This eliminates the need for separate chemical injection stages and ensures proper mixing ratios are maintained throughout the treatment process, reducing chemical mixing complexity while maintaining sand control effectiveness.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution allows for efficient control of fines migration in a single stage, reducing equipment erosion and maintaining well performance by forming a stable gel that traps small particles, thereby preventing their migration through the proppant or gravel pack.
Implementation Method 1
an emulsion with an oil phase containing calcium hydroxide and an aqueous phase with insoluble silica particles, which reacts to form a calcium silicate hydrate gel
Implementation Method 2
forming a stable gel that traps small particles
Data Source
AI summary
A treatment fluid that can be used for treating a subterranean formation penetrated by a wellbore is prepared from a primary treatment fluid component and an emulsion component mixed with the primary treatment fluid component. The emulsion component has an oil phase and an aqueous phase. The emulsion component comprising a source of insoluble silica particles and a source of calcium hydroxide, wherein the source of calcium hydroxide is present in the oil phase, and the source of insoluble silica particles are contained in the aqueous phase. The method is carried out by contacting at least a portion of the formation with the treatment fluid.