Insulating Composition Limits Thermal Losses in Oil Recovery
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Solution Overview
Problem
Thermal hydrocarbon recovery from oil sands is inefficient due to significant energy losses to surrounding rock and thief zones, leading to high operational costs and reduced economic returns, as existing methods like steam assisted gravity drainage (SAGD) struggle to mitigate thermal losses effectively.
Innovation Solution
An insulating composition with a non-gaseous phase component, insoluble in hydrocarbons, is introduced into the reservoir to limit thermal diffusivity, reducing heat transfer to overburden and underlying strata, while a steam injection system heats the hydrocarbons, allowing for efficient recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If steam is injected to heat bitumen for thermal recovery, then hydrocarbon recovery is enabled, but thermal losses to surrounding rock and thief zones increase operational costs
Solution Approach 1:
An insulating composition is introduced as an intermediary substance between the steam chamber and the surrounding rock formations/thief zones. This composition acts as a thermal barrier that mediates heat transfer, allowing steam to heat bitumen effectively while preventing excessive thermal losses to the surrounding environment, thereby resolving the contradiction between enabling hydrocarbon recovery and minimizing energy loss
Solution Approach 2:
The thermal conductivity parameter of the reservoir system is modified by introducing the insulating composition. This changes the thermal properties of the system, creating a layered structure with different thermal conductivities that optimizes heat distribution to bitumen while reducing parasitic heat losses to overburden and underlying formations, thus improving energy efficiency while maintaining recovery productivity
2Loss of energy
If non-gaseous insulating composition is introduced to reduce thermal losses, then energy efficiency is improved, but the composition must remain insoluble in hydrocarbons to avoid interference with recovery
Solution Approach 1:
The insulating composition is designed with specific local qualities - it is placed in specific locations (around steam chambers, in thief zones) and has specific properties (non-gaseous, insoluble in hydrocarbons, appropriate thermal conductivity). These localized quality specifications ensure the composition provides thermal insulation where needed while maintaining compatibility with the hydrocarbon recovery process, resolving the contradiction between energy efficiency and hydrocarbon compatibility
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 significantly reduces thermal losses, enhancing energy efficiency and economic viability by maintaining heat transfer primarily to the hydrocarbons, thereby improving the recovery process.
Implementation Method 1
an insulating composition within the reservoir adjacent one of an overburden stratum and an underlying stratum... thermal diffusivity from the steam limited by the insulating composition
Data Source
AI summary
Methods and systems produce petroleum products by insulating a thermal hydrocarbon recovery process from heat loss to surrounding areas of a formation utilizing an insulating composition including a non-gaseous phase component introduced into the reservoir that is different from water and insoluble in the hydrocarbons. The insulating composition may be disposed in the reservoir adjacent to where the heat loss is desired to be limited. In addition, the insulating composition may be disposed in a thief zone and may also be from an agent activated to form the composition at such desired locations by selecting activation dependent on at least one of temperature, time delay and oil saturation.