David H Johnston

Title: Innovative Contributions of David H. Johnston in Seismic Data Analysis

Introduction

David H. Johnston, an accomplished inventor based in Houston, TX, has made significant strides in the field of seismic data analysis. With a total of three patents to his name, Johnston's innovative approaches have revolutionized how seismic data is interpreted, particularly in the context of hydrocarbon exploration and production.

Latest Patents

Among his latest patents, Johnston has developed a method for determining convergence in full wavefield inversion (FWI) of 4D seismic data. This patent provides a robust methodology for assessing the convergence of subsurface models by focusing on specific subregions, rather than evaluating the entire model at once. By isolating regions that exhibit different behaviors, such as target reservoirs and background areas, this approach enhances the accuracy and efficiency of seismic data interpretation.

Another noteworthy patent by Johnston is the method for time-aligning multiple offset seismic data volumes. This innovation streamlines the process of aligning near-offset and far-offset data volumes by utilizing time shifts and cross-correlation techniques. By filtering and generating a time-aligned seismic volume, this method significantly improves the clarity of seismic interpretations, which is vital for successful exploration efforts.

Career Highlights

Currently, David H. Johnston works at ExxonMobil Upstream Research Company, where he applies his expert knowledge in seismic data processing. His work is instrumental in enhancing the company's exploration capabilities and ensuring that hydrocarbon resources are accurately assessed and monitored.

Collaborations

Throughout his career, Johnston has collaborated with esteemed colleagues such as John E. Eastwood and Brian P. West. Together, they have contributed to groundbreaking advancements in seismic technology and have furthered the understanding of subsurface characteristics critical to the energy sector.

Conclusion

In summary, David H. Johnston's innovative contributions to seismic data analysis have not only led to the development of essential patents but have also solidified his reputation as a leading inventor in the field. As he continues to push the boundaries of seismic technology, Johnston's work remains vital for the advancement of hydrocarbon exploration and extraction methodologies.