Single-Phase Fluid for Simultaneous Wellbore Deposit Removal
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Solution Overview
Problem
Current methods for removing organic and inorganic deposits from oil and gas wellbores are inefficient, often requiring multiple steps and generating hazardous byproducts, such as gas emissions or costly water disposal, and do not effectively address the simultaneous removal of both types of deposits.
Innovation Solution
A single-phase fluid comprising solvents, surfactants, co-solvents, and scale dissolvers is introduced into the wellbore to simultaneously disperse organic deposits like paraffins and asphaltenes and dissolve inorganic deposits, allowing for their partial removal in a single step, without separating into immiscible phases during storage or use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate methods are used to remove organic and inorganic deposits, then each type of deposit can be addressed with specialized treatments, but the process complexity increases and multiple steps are required
Solution Approach 1:
The patent combines multiple deposit removal functions into a single fluid composition that can remove both organic deposits (paraffins, asphaltenes) and inorganic deposits (scales) simultaneously. The fluid integrates solvents for organic materials, scale dissolvers for inorganic materials, and surfactants for dispersion into one unified system, eliminating the need for separate treatment steps.
Solution Approach 2:
The single fluid composition performs multiple functions: it acts as a solvent for organic deposits, a scale dissolver for inorganic deposits, and a surfactant for dispersing removed materials. This multi-functional approach allows one fluid to handle all deposit types that previously required different specialized treatments.
2Ease of manufacture
If traditional solvents and dispersants are used to remove paraffin deposits, then the wax can be slowly eaten away, but the process is not fast enough for economic deposit removal
Solution Approach 1:
The patent changes the chemical parameters of the removal system by using a sophisticated fluid composition with specific solvents, surfactants, and scale dissolvers in controlled concentrations. This creates a chemically aggressive yet controlled environment that rapidly breaks down deposits without requiring excessive time or temperature.
Solution Approach 2:
The invention uses a composite fluid system combining multiple chemical components (solvents, surfactants, scale dissolvers) that work synergistically. The composite nature of the fluid provides both rapid attack on deposits and controlled removal, achieving economic viability through enhanced removal speed.
3Temperature
If redox reactions are used to melt paraffin deposits, then the wax melts effectively, but gas is generated which can be explosive and the reaction is kinetically unpredictable
Solution Approach 1:
The patent converts the harmful gas-generating redox reaction into a beneficial controlled chemical process. Instead of using aggressive redox reactions that produce explosive gases, the invention uses carefully selected solvents and scale dissolvers that chemically break down deposits into safe, soluble, or dispersible products without hazardous gas generation.
Solution Approach 2:
The invention uses consumable chemical agents (solvents, surfactants, scale dissolvers) that are injected into the wellbore, perform their deposit-removal function, and are then disposed of with the spent fluid. These single-use chemical components replace dangerous reusable systems like redox reactions.
4Ease of operation
If water is used to deliver reactants for deposit removal, then the reactants can be transported easily, but the dispersed deposits create water that must be expensively dealt with
Solution Approach 1:
The patent minimizes the need for expensive water disposal by using a fluid composition where the removal mechanism does not rely on water-based dispersion. Instead, deposits are dissolved or broken down into forms that can be easily removed with the spent fluid, reducing the volume and complexity of waste treatment required.
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 method effectively disperses organic deposits and dissolves inorganic deposits in a single step, reducing operational costs and environmental impact by using a stable, single-phase fluid that can be injected and removed without separating, thereby enhancing hydrocarbon flow and reducing wettability alteration damage.
Implementation Method 1
The single phase fluid includes, but is not necessarily limited to, at least one solvent, at least one surfactant, and at least one co-solvent
Implementation Method 2
The single phase fluid includes, but is not necessarily limited to, at least one solvent, at least one surfactant, and at least one co-solvent
Implementation Method 3
contacting the organic deposits and inorganic deposits in the wellbore with a single phase fluid for an amount of time effective to simultaneously disperse the organic deposits and dissolve the inorganic deposits
Data Source
AI summary
Both organic deposits and inorganic deposits in a wellbore are simultaneously removed from a wellbore by contacting the deposits with a single phase fluid for an amount of time effective to simultaneously disperse the organic deposits and dissolve the inorganic deposits, where the single phase fluid includes least one solvent, at least one surfactant, at least one co-solvent, and at least one scale dissolver. The method further involves at least partially removing the organic deposits and inorganic deposits from the wellbore. In an embodiment where it is not necessary to remove inorganic deposits, the scale dissolver may be omitted.