Customer Challenges
- The operator required a detailed understanding of water injection distribution across a complex, multi-zone reservoir with barriers and sleeves in place. However, several factors made this difficult:
- Uncertainty in injection rates relative to expected reservoir permeability, limiting confidence in the reservoir model
- Need for an accurate zonal injection profile to understand sweep efficiency and optimize waterflooding
- Low injection rates in the 7” casing section, reducing the effectiveness of conventional spinner-based measurements
- Annular flow behind tubing, compromising the reliability of standard Injection Logging Tool (ILT) strings
- A highly complex completion design, making zonal attribution challenging
- Standard logging approaches could not reliably meet these objectives, requiring a tailored and technically advanced solution
Expro Excellence
- Expro leveraged technical expertise and innovation to deliver a customized logging and interpretation solution, specifically designed for the well conditions
- Developed a bespoke logging procedure tailored to low-rate injection and complex completion architecture
- Adapted the data interpretation workflow to ensure seamless integration with third-party systems
- Applied a non-standard, multi-method interpretation approach, combining:
- ILT measurements
- Thermal inversion analysis
- Spectral noise analysis
- This integrated methodology enabled accurate identification of zonal injection behavior, overcoming the limitations of conventional techniques
- Successfully distinguished flow contributions despite annular flow interference
- Delivered robust results in conditions where traditional logging methods would be unreliable
- Expro also demonstrated strong collaboration with third-party providers, ensuring smooth execution and effective communication throughout the project
Value to Client
- Expro’s solution delivered critical insights and measurable value:
- Identified that ~75% of injected water was being absorbed by a single sand, with minimal contribution from other zones
- Enabled the operator to verify well integrity and accurately quantify injection rates, previously unknown to surface teams
- Provided data to update and refine the reservoir model, improving forecasting and long term field performance
- Operational Impact
- Optimized waterflood strategy and reservoir pressure management
- Enabled targeted interventions such as:
- Adding perforations
- Adjusting sleeve configurations
- Selective stimulation of underperforming zones
- Business Value
- Improved decision-making speed and confidence
- Reduced uncertainty in reservoir performance
- Unlocked opportunities to enhance recovery and production efficiency
Contact
For further information, please contact wellintervention@expro.com.
