Offshore Separation Heat Integration for Lower Platform Weight
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Solution Overview
Problem
Conventional offshore fluid processing systems occupy significant space and weight, require high energy usage, and have large demands for heating and cooling utilities, limiting fluid handling capacity and increasing capital and operating costs.
Innovation Solution
A single stage separation module integrated with a heat network that uses the processed fluids as heating and cooling media, eliminating the need for separate heating and cooling systems and reducing the size and weight of compressors and glycol regenerators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional multi-stage separation and dedicated heating/cooling systems are used, then fluid processing reliability is ensured, but platform space occupation and equipment weight increase significantly
Solution Approach 1:
The patent combines multiple separation stages into a single integrated separator that performs flash separation, gravity separation, and centrifugal separation simultaneously. This merging of functions eliminates the need for multiple separate separators, heaters, and coolers, thereby reducing equipment weight while maintaining processing reliability through the coordinated action of integrated components.
Solution Approach 2:
The single separator is designed to perform multiple functions: flash separation, gravity separation, centrifugal separation, and integrated heating/cooling operations. This multi-functionality allows one piece of equipment to replace several conventional units, reducing overall equipment weight while ensuring reliable fluid processing through diverse separation mechanisms operating within a single unit.
2Reliability
If conventional multi-stage compression with dedicated cooling is used, then gas compression reliability is ensured, but energy consumption and equipment weight increase
Solution Approach 1:
The patent captures the waste heat generated during gas compression and uses it to preheat the produced fluids before they enter the separator. This converts the harmful thermal energy that would otherwise be lost into a useful heating resource, reducing the energy consumption of dedicated heaters and lowering overall compression energy requirements while maintaining reliable gas compression.
3Manufacturing precision
If conventional staged de-pressurizing with multiple separators is used, then fluid separation effectiveness is improved, but platform space occupation increases
Solution Approach 1:
The patent merges flash separation, gravity separation, and centrifugal separation into a single integrated separator unit. This combination maintains effective fluid separation by sequentially performing multiple separation mechanisms within one compact device, thereby reducing platform space occupation while preserving separation effectiveness through the coordinated action of integrated separation stages.
Solution Approach 2:
The single separator employs a nested structure where centrifugal separation components are positioned within the gravity separation section, which in turn is contained within the flash separation chamber. This nesting arrangement allows multiple separation stages to be accommodated in a compact footprint, reducing platform space while maintaining effective fluid separation through sequential processing.
4Reliability
If conventional separate heating and cooling systems are used, then temperature control reliability is ensured, but equipment complexity and weight increase
Solution Approach 1:
The patent merges heating and cooling functions into the single separator by using the compression waste heat to preheat fluids and using the cold glycol circulation system for cooling. This integration reduces equipment complexity by eliminating separate heating and cooling systems while maintaining temperature control reliability through the coordinated operation of integrated thermal management components.
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 system achieves efficient space utilization, reduces weight and energy consumption, and lowers capital and operating costs by integrating heating and cooling processes, while optimizing glycol unit operation and eliminating waste heat recovery units.
Implementation Method 1
The heat network is configured to heat the produced fluid using the compressed gas from the gas stream
Implementation Method 2
a single stage separation module configured to separate the produced fluid into a gas stream, an oil stream, and a water stream
Implementation Method 3
Compression of gas results in heating of the gas
Implementation Method 4
a glycol system in which a glycol absorbs water from the gas in a contactor and then releases the absorbed water in a regenerator
Data Source
AI summary
A system for processing oil and gas at an offshore facility includes a single stage separation module. A gas stream from the single stage separation module is pressurized in a primary compressor, and then is used to heat the incoming oil and gas upstream of the single stage separation module. Flash gas from treatment of an oil stream from the single stage separation module is pressurized in a flash gas compressor and then is used to heat glycol utilized in a gas dehydration unit. The pressurized flash gas is then commingled with the gas stream from the single stage separation module upstream of the primary compressor.