Multi-zone Hydraulic Control Module for Horizontal Well Inflow
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Achieving control over the inflow of fluids into multiple zones of a horizontal wellbore is challenging due to the difficulty in managing fluid distribution and isolation in open hole horizontal completions, particularly in sandstone and carbonate formations, where sand screen plugging and breakthrough can lead to well failure.
Innovation Solution
A multi-zone control system is implemented, featuring hydraulically actuated flow control devices distributed along the well zones, with a control module positioned between them, allowing for selective distribution of hydraulic actuating fluid via electrical control signals through hydraulic lines, enabling controlled shifting of flow control devices to open, closed, or choked positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If open hole horizontal completions are used for hydrocarbon extraction, then well installation is simplified and faster, but control over fluid inflow from different zones is difficult to achieve
Solution Approach 1:
The completion string is divided into multiple independently controllable zones with individual flow control devices. Each zone can be controlled separately through hydraulic actuators that receive fluid through distributed hydraulic lines, allowing precise inflow management from different well sections while maintaining the simplicity of open hole completion.
Solution Approach 2:
Hydraulic actuators are distributed along the completion string and connected through hydraulic lines to receive actuating fluid. These hydraulic mechanisms enable remote control of flow control devices at various zones without requiring physical access to each control point, resolving the contradiction between simple installation and operational control.
2Reliability
If gravel packs are combined with completion strings to filter sand, then well failure due to sand plugging is reduced, but device complexity increases
Solution Approach 1:
The gravel pack filtration system is integrated with the completion string and flow control devices into a unified structure. The gravel pack is positioned within the completion architecture, allowing sand filtration to occur naturally as fluids pass through the completion, thereby preventing sand plugging without adding separate complex filtration systems.
3Productivity
If electric submersible pumping systems are used to produce well fluids, then production capability is enhanced, but maintenance complexity and downtime increase due to system replacement requirements
Solution Approach 1:
The pumping system is divided into modular sections that can be independently accessed and replaced. The electric submersible pump is positioned within the completion string architecture, allowing individual pump modules to be exchanged without replacing the entire completion system, thereby reducing maintenance downtime and complexity.
4Ease of operation
If flow control devices are distributed along the completion, then zonal inflow control is achieved, but hydraulic fluid distribution and isolation become more difficult
Solution Approach 1:
A centralized hydraulic control system acts as an intermediary, distributing actuating fluid through a network of hydraulic lines to multiple distributed flow control devices. This centralized mediation simplifies fluid management by providing a single control point for distributing hydraulic fluid to all zones, rather than requiring independent fluid management at each control device.
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 system provides precise control over fluid inflow, allowing for active management of fluid flow into specific well zones, enhancing production efficiency and reducing the risk of well failure by isolating zones and managing sand influx effectively.
Implementation Method 1
The control module is supplied with hydraulic actuating fluid and is in fluid communication with each of the flow control devices via a pair of hydraulic lines which may be referred to as a hydraulic actuating line and a hydraulic return line
Data Source
AI summary
A controllable, multi-zone control system is provided for controlling the inflow of fluids into a completion, e.g. a lateral completion, at a plurality of well zones. According to an embodiment, flow control devices are distributed along the completion and a control module is positioned between the flow control devices, e.g. in a middle region of the completion. The control module is supplied with hydraulic actuating fluid and is electrically controllable to enable selective distribution of the hydraulic actuating fluid to selected flow control devices via a hydraulic actuating line and a hydraulic return line. The control module may be controlled via electric signals, thus controlling distribution of hydraulic actuating fluid under pressure to selected flow control devices so as to shift the selected flow control devices to a desired flow positions.