Low-Temperature Wellbore Catalyst for Paraffin and Scale Removal
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Solution Overview
Problem
Existing wellbore operations face challenges in removing damaging materials such as paraffin deposits and scales in low temperature zones, which restrict hydrocarbon fluid flow, as conventional methods are ineffective below 70° C. (21° C.) and can impact reservoir structure.
Innovation Solution
An exothermic reaction mixture with a low-temperature catalyst, comprising ammonium-based compounds and sodium nitrite, is used to initiate a controlled energy release at temperatures below 70° C., utilizing buffers and surfactants to manage the reaction, thereby increasing the temperature and removing damaging materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional heating methods are used to remove damaging material, then the temperature can be raised effectively, but the method is ineffective below 70°C and can impact reservoir structure
Solution Approach 1:
The invention changes the activation temperature parameter by introducing a low-temperature catalyst that enables exothermic reactions to initiate and sustain at temperatures below 70°C, specifically targeting the low temperature zone range of 10°C to 70°C where conventional methods fail
Solution Approach 2:
A catalyst acts as an intermediary substance that facilitates the exothermic reaction between oxidizer and fuel at low temperatures. The catalyst enables the chemical reaction to proceed effectively in the low temperature zone without requiring high external heating, thus removing damaging material while preserving reservoir structure
2Productivity
If exothermic reaction is initiated in low temperature zone, then damaging material can be removed, but the reaction may not sustain below 70°C without catalyst
Solution Approach 1:
The system achieves self-sustaining operation through exothermic reactions that generate their own heat. Once initiated by the low-temperature catalyst, the reaction produces sufficient thermal energy to maintain itself and continue removing damaging material without requiring external heating sources
Solution Approach 2:
The catalyst modifies the reaction kinetics parameters, lowering the activation energy threshold to enable sustainable exothermic reactions at temperatures as low as 10°C to 70°C, ensuring reliable operation in low temperature zones where conventional reactions would stall
3Productivity
If high temperature is applied to remove paraffin deposits, then flow can be enhanced, but the wellbore or flowline may be damaged
Solution Approach 1:
The invention changes the temperature parameter from high temperature (above 70°C) to low temperature operation (10°C to 70°C) by using a specialized catalyst, achieving the same damaging material removal effect while avoiding thermal damage to the wellbore and flowline structures
Solution Approach 2:
The invention converts the previously harmful low temperature condition (which caused damaging material accumulation) into a beneficial operating range by developing catalysts that enable effective exothermic reactions specifically within the 10°C to 70°C zone, turning the problem condition into the solution condition
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 exothermic reaction effectively raises temperatures to break down and remove paraffin deposits and scales, enhancing hydrocarbon flow without damaging the wellbore or flowline, while maintaining control over the reaction process.
Implementation Method 1
An exothermic reaction can produce or otherwise release energy upon reacting, and the energy can be released as heat to an area surrounding the exothermic reaction
Implementation Method 2
A catalyst can be used in a reaction mixture to increase the rate of reaction
Data Source
AI summary
Described herein is a low-temperature catalyst and method of use for causing an exothermic reaction in a low temperature environment. The mixture can include sodium nitrite, an ammonium-based compound, and an oxidizer and can be injected into a fluid flow path. The fluid flow path can be a pipeline, a flowline, a wellbore, or a subterranean formation. The mixture can cause an exothermic reaction in the fluid flow path and remove, using the exothermic reaction, a damaging material from the fluid flow path.