Exploring the Influence of VClay Variation on Pore Pressure Prediction through Resistivity Logs

In the ever-evolving landscape of subsurface exploration and characterization, the accurate prediction of pore pressure has remained a critical challenge. The complex interplay of factors such as shale porosity, stress variations, and mineralogy complicate the task of anticipating pore pressure levels. Emerging techniques that integrate comprehensive rock property approaches frequently offer resolutions to these challenges, and as a result, we have formulated a novel approach harnessing resistivity log data.

The Challenge: Navigating the Complexities of Pore Pressure Prediction

Many existing methods for pore pressure prediction rely on the Rubey-Hubbert porosity model, a classic approach dating back to 1959. Yet, shale porosity can deviate from this model under excessive pressure, leading to inaccuracies in predicting pore pressure. Incorporating P-wave velocity and VClay data through Rock Physics Models has shown promise in improving predictions (Vernik, 2011). However, the challenge lies in extending these models to resistivity log data, which offers broader vertical coverage compared to sonic logs.

The Solution: A Comprehensive Rock Physics Model

RokDoc has introduced a revolutionary solution that addresses the limitations of traditional methods. By building on the work of Vernik and incorporating the Waxman-Smits model, we have formulated an advanced Rock Physics Model that considers the influences of salinity, temperature, and clay fraction. This model is designed to provide more accurate pore pressure predictions using resistivity log data.

Well E - US GoM

The Benefits: Precision and Accessibility

The advantages of this inventive approach are extensive. By utilizing resistivity log data and factoring in crucial elements like salinity and temperature, the new resistivity model provides heightened accuracy in predicting pore pressure. Its seamless integration with existing workflows guarantees coherence and user-friendly implementation. Furthermore, the model's effectiveness has been demonstrated through successful applications in numerous deep wells, attesting to its strength and adaptability. The model showcases exceptional performance both in pre-emptive pressure forecasting and real-time monitoring scenarios, where we've also integrated WITSML live feed data to refine the model's calibration during drilling operations.


Call to Action: Embrace the Future of Pore Pressure Prediction

With RokDoc's pioneering latest model, a new era of precise and dependable pore pressure predictions is now available. Whether you're engaged in post-drill analysis or real-time operations, this model provides a holistic solution that harnesses the potential of resistivity log data. Learn how this innovation can transform your exploration efforts. Contact us now to unlock the full potential of precise pore pressure prediction.

RokDoc, PPFG
Alex Edwards
Post by Alex Edwards
Sep 21, 2023 11:26:34 PM