Customer Challenges
- A 6,500 m deep shale‑oil well with a 3,000 m horizontal lateral required high resolution production profiling and phase contribution analysis across its multi‑stage fractured completion#
- The operation faced several key challenges:
- Extended horizontal access increasing the risk of debris buildup and limiting the ability to perform multiple logging passes
- Minimal and uneven influx, making zone identification difficult
- Uniform horizontal temperature along the lateral, reduced the effectiveness of traditional DTS interpretation
Expro Excellence
- Expro deployed a hybrid Distributed Fiber Optic Sensing (DFOS) and Production Logging Tool (PLT) tractor‑conveyed solution to deliver comprehensive full‑well surveillance in a single operational run
- The package included:
- DFOS (DTS + DAS) for continuous distributed inflow monitoring
- eXDTS (Low Freq DAS) to derive velocity profiles from slope-based acoustic patterns
- Full PLT suite including spinner, ultrasonic f lowmeter, and multi holdup sensors for independent phase and flow validation
- A structured flow program was executed at shut‑in, and at 25%, 50%, and 100% choke settings to capture dynamic reservoir and completion behavior. PLT acquisition was performed during the pull out sequence at maximum flow rate • Rapid data processing was enabled through Expro’s DFOS eXtract® software with processed data transmitted to an off-site analyst for near real-time interpretation and analysis • All insights were integrated and visualized using Expro’s QikView™ software, delivering a clear, unified picture of the well’s dynamic performance and contributing zones
Value to Client
- Delivered a complete production profile across the horizontal wellbore
- Identified clear eXDTS slope signatures, enabling accurate flow- velocity estimation and zone contribution identification
- Holdup interpretation provided robust phase fraction insights, improving understanding of fluid behavior
- Strong alignment between DFOS derived and PLT derived profiles demonstrating high data integrity and validating the combined methodology
- Executed safely and efficiently with excellent data quality obtained from both measurements systems
- Delivered clear visibility of fracture zone contribution showing exactly where flow originates and how production responds to different choke settings
- Verified well performance without the need for extended intervention reducing operational risk, cost and time by avoiding multiple logging runs
- Expro equipped the operator to optimize production and confidently plan future stimulation or surveillance activities
- A compact, integrated DFOS and PLT solution provided the actionable clarity needed to manage complex horizontal shale oil wells effectively
Contact
For further information, please contact WellIntervention@expro.com.
