Single Trip Multi-Zone Completion System for Wellbore Operations
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Solution Overview
Problem
Deep well drilling operations face challenges due to the time-consuming and costly process of assembling and deploying service tools over long distances, leading to increased costs and risks of tool loss, as well as restricted tool sizes due to wellbore diameter reduction with each trip, necessitating more efficient methods for fracturing and gravel packing multiple production intervals.
Innovation Solution
A single trip multi-zone completion system that allows for the hydraulic fracturing and gravel packing of multiple wellbore zones in a single run, using an outer completion string with interval control valves and control modules to regulate and monitor production, and dual control lines for real-time monitoring and fluid parameter measurement, enabling intelligent hydrocarbon production and allowing for system maintenance without removing the outer completion string.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple trips are made into the wellbore to deploy service tools, then complete fracturing and gravel packing of multiple zones can be achieved, but time consumption and operational costs increase significantly
Solution Approach 1:
The completion system is divided into multiple self-contained zone segments, each with its own packer, screen, and isolation capability. This allows the entire multi-zone completion to be deployed as one integrated assembly in a single trip, eliminating the need for multiple separate trips to service each zone individually.
Solution Approach 2:
Multiple zone completion operations that would traditionally require separate trips are merged into a single integrated deployment. The system combines multiple packers, screens, and isolation mechanisms into one unified assembly that can be run into the wellbore and set in multiple zones during a single trip.
2Reliability
If multiple trips are made into the wellbore, then complete service operations can be performed, but the inner diameter of the wellbore is reduced with each trip
Solution Approach 1:
The complete multi-zone completion assembly is prepared and assembled at the surface before being deployed in a single trip. All necessary components including packers, screens, and isolation devices are pre-positioned in the correct sequence, allowing the entire completion to be installed without subsequent trips that would further reduce wellbore diameter.
3Length of stationary object
If service tools are assembled and deployed over long distances, then deep well completions can be achieved, but equipment complexity and operational difficulty increase
Solution Approach 1:
The completion system employs nested components where inner assemblies are contained within outer assemblies. The work string is nested within the completion assembly, which is itself nested within the wellbore. This nested structure allows for compact packaging at the surface and systematic deployment during a single trip, reducing operational complexity despite the extreme well depths.
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 significantly reduces the number of trips required, saving time and costs, enhances hydrocarbon production efficiency, and allows for real-time monitoring and intelligent production management, while enabling system maintenance without removing the outer completion string, thus optimizing deep well operations.
Implementation Method 1
used to hydraulically fracture and gravel pack the multiple zones
Implementation Method 2
gravel packing of multiple wellbore zones
Data Source
Figure 1~2
AI summary
Disclosed are systems and methods of producing from multiple production zones with a single trip multi-zone completion system. One single trip multizone completion system includes an outer completion string having at least one sand screen arranged thereabout and being deployable in an open hole section of a wellbore that penetrates at least one formation zone, a production tubing arranged within the outer completion string and having at least one interval control valve disposed thereon, a control line extending external to the production tubing and being communicably coupled to the at least one interval control valve, and a surveillance line extending external to the outer completion string and interposing the at least one formation zone and the at least one sand screen.