Wellbore Fracture Isolation for Simplified Hydrocarbon Pressurization
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Solution Overview
Problem
Existing methods for enhancing hydrocarbon recovery from tight formations, such as hydraulic fracturing and cyclic gas injection, are inefficient and require complex downhole tool systems, leading to limited success in increasing hydrocarbon production.
Innovation Solution
Pressurizing a wellbore with one or more first fractures and isolating them to enhance hydrocarbon production through one or more second fractures, using basic isolation and fracturing operations, without the need for complex tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If complex downhole tool systems are used for fracture-to-fracture flooding, then hydrocarbon recovery is enhanced, but device complexity increases
Solution Approach 1:
The wellbore is divided into multiple isolated fracture zones, with injection fractures and production fractures separated by packers. This segmentation allows independent control of injection and production zones without requiring complex dual-tubing systems, simplifying the overall tool system while enabling effective fracture-to-fracture flooding
Solution Approach 2:
Fractures are created and isolated with packers before the actual flooding operation begins. This preliminary action establishes the injection and production pathways in advance, eliminating the need for complex real-time tool operations during the flooding process
2Device complexity
If sequential injection and production through single tubular is used, then device complexity is reduced, but operation complexity increases due to opening and closing at each zone
Solution Approach 1:
All isolation packers are installed and positioned in the wellbore before the flooding operation begins. This preliminary installation eliminates the need for complex opening and closing operations at each fracture zone during the actual injection and production process, significantly simplifying operations
3Reliability
If dual-tubing system is used for simultaneous injection and production, then isolation between zones is ensured, but device complexity increases
Solution Approach 1:
The wellbore is segmented into isolated zones using packers installed within a single tubular system. This segmentation provides reliable isolation between injection and production zones without requiring a complex dual-tubing configuration, maintaining zone separation while simplifying the overall system
Solution Approach 2:
Packers serve as intermediary elements that create reliable isolation between injection and production zones within a single tubular system. These packers act as mechanical barriers that ensure zone separation without requiring multiple independent tubular systems
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
Enhances hydrocarbon recovery by up to 100% compared to primary recovery methods, facilitating efficient production through simplified fracture-to-fracture flooding with reduced tool complexity.
Implementation Method 1
pressurizing a formation by pumping fluid into a portion of a wellbore having one or more first fractures
Implementation Method 2
restricting fluid communication between the formation and the wellbore via the first fracture(s) by disposing a tubular through the portion of the wellbore and setting packers on the tubular on opposing sides of the first fracture(s)
Data Source
AI summary
Some methods of producing hydrocarbons from a formation include pressurizing a formation by pumping fluid into a portion of a wellbore having one or more first fractures in fluid communication with the formation, while the formation is pressurized, restricting fluid communication between the formation and the wellbore via the first fracture(s), and, while fluid communication between the formation and the wellbore via the first fracture(s) is restricted, producing hydrocarbons from the formation via one or more second fractures of the wellbore that are in fluid communication with the formation. Some methods include, while fluid communication between the formation and the wellbore via the first fracture(s) is restricted, creating the second fracture(s).