Downhole Cyclonic Solids Separator for Water Cut Reduction
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Solution Overview
Problem
Oil and gas wells face challenges due to increasing water cut, which reduces the economic viability of wells and incurs high costs for water disposal. Current methods for reducing water cut are inefficient and environmentally unfriendly.
Innovation Solution
Implementing a multilateral well system with downhole fluid separation, where cyclonic solids separators and helical separators are used to separate water and solids from hydrocarbons downhole, allowing for efficient disposal of water and solids without the need for surface separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If surface separation and water disposal methods are used, then water cut reduction is achieved, but energy consumption increases and environmental impact worsens
Solution Approach 1:
The cyclonic separator performs water-solids separation downhole before the fluids reach the surface, eliminating the need for subsequent surface separation operations. This preliminary action reduces water cut at the source, thereby decreasing the energy required for surface processing and transportation.
Solution Approach 2:
The invention replaces energy-intensive mechanical surface separation systems with a passive cyclonic separation system that operates downhole using centrifugal forces generated by fluid flow itself, without requiring additional power input.
2Quantity of substance
If surface transportation of produced water is implemented, then water disposal is achieved, but disposal costs increase
Solution Approach 1:
By separating and removing solids and water downhole before production fluids reach the surface, the system eliminates the need for costly surface transportation and disposal operations. The preliminary separation action reduces the volume of water requiring disposal and eliminates transportation infrastructure costs.
3Productivity
If multilateral well system with downhole separation is implemented, then productivity increases, but device complexity increases
Solution Approach 1:
The multilateral well system divides the wellbore into multiple laterals, each capable of independent production. The cyclonic separator is installed at the junction point, segmenting the fluid flow paths while maintaining simplified separation functionality. This segmentation increases productivity by accessing multiple zones without proportionally increasing complexity.
Solution Approach 2:
The cyclonic separator serves multiple functions: it separates water from solids, removes produced water, and handles fluids from multiple lateral wells simultaneously. This multi-functionality increases productivity while avoiding the need for multiple separate separation systems, thereby limiting the increase in device complexity.
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
This approach increases the value of produced fluids by reducing water cut, decreases disposal costs, and minimizes environmental impact by eliminating the need for energy-intensive surface separation and transportation of produced water.
Implementation Method 1
cyclonic solids separators and helical separators are used to separate water and solids from hydrocarbons downhole
Data Source
AI summary
An apparatus comprises one or more solids separators to be positioned downhole in a well formed in a subsurface formation, wherein each of the one or more solids separators are configured to receive a fluid from the subsurface formation and separate out sediment from the fluid, wherein the sediment is transported after separation to a destination location.