Company Filing History:
Years Active: 1991-1996
Title: L Scott Allen: Innovator in Borehole Logging Technology
Introduction
L Scott Allen is a notable inventor based in Dallas, TX (US), recognized for his contributions to the field of borehole logging technology. He holds a total of 4 patents, showcasing his innovative approach to subsurface formation analysis.
Latest Patents
One of his latest patents is for a "Pulsed neutron decay logging" tool. This invention features a pair of spaced-apart detectors that record intensity signals representing the die-away of nuclear radiation in a subsurface formation. The tool produces weighted moments of the intensity signals and a model, which are equated and solved to obtain values for a borehole decay constant, a formation decay constant, and a formation-to-borehole amplitude ratio for each detector. A trained neural network then generates intrinsic values of a formation's macroscopic thermal neutron absorption cross section, formation porosity, and borehole fluid cross section, creating a log of these values versus depth as the tool traverses the borehole.
Another significant patent is the "Method and apparatus for producing a porosity log of a subsurface." In this invention, a borehole logging tool is lowered into a borehole, where a neutron detector measures the die-away of nuclear radiation in the formation. A model of the die-away is produced using exponential terms that account for borehole, formation, and thermal neutron background components. The moments of the measurements and model are equated and solved to determine the ratio of the borehole to formation amplitude components. This process allows for the determination of a formation decay constant and an epithermal neutron lifetime, which are used to produce a porosity log of the formation.
Career Highlights
L Scott Allen has made significant strides in his career, particularly through his work at Mobil Oil Corporation. His innovative patents have advanced the understanding and measurement of subsurface formations, contributing to more efficient resource extraction and analysis.
Collaborations
Throughout his career, Allen has collaborated with notable coworkers such as William R Mills and Frank P Leland, further enhancing the impact of his inventions in the field.
Conclusion
L Scott Allen's contributions to borehole logging technology through his innovative patents have made a lasting impact on the industry. His work continues to influence the methods used for subsurface analysis and resource management.