Over forty-nine years experience in design and improvement of systems for oil/gas and mineral exploration in both wireline and logging while drilling (LWD) environments. Proven creativity and tenacity. Recognized expertise on neutron porosity measurements in earth formations with numerous patents, awards, and publications, including Schlumberger’s own magazine, The Technical Review. Three neutron porosity measurement systems are ISO 9000 certified; two others are pending. Extensive experience includes theoretical and practical knowledge of nuclear sensors, computerized logging equipment, digital signal processing, vertical resolution enhancement, neural net technology, Monte-Carlo modeling, and pattern recognition methods. Particularly strong programming skills with EXCEL+VBA and VISUAL BASIC for realtime applications. Innovative products in pulsed neutron logging technology, including calibration, physical modeling, and non-linear least squares fitting of multichannel time spectra. International expert on the propagation of neutrons and gamma rays in vuggy, laminated, fractal porous media. A pioneer in thermal neutron diffusion coefficient logging and frac height determination via neutron activation.
Doctor Neutron works with both the Warrior + (Microsoft Visual Studio) and PowerLog commerical well-logging systems. He is an expert on VMWARE Workstation. He has developed extensive MCNP5 Monte Carlo Models for dual-spaced neutron, multiple-spaced density logging tools, and also multiple detector pulsed neutron die-away and gamma spectroscopy logging tools.
Most recently Doctor Neutron has developed green methods using neutron activation analyses to determine frac height and location of induced fractures in earth formations.(US Patents 7,726,397 and 8,214,151).
HALLIBURTON ENERGY SERVICES - Houston, Texas 1996 - 1999
(Subsidiary of Halliburton Company that merged with Dresser Industries in 1998)
Improved accuracy of hostile neutron and LWD neutron tools to increase competitive/commercial status as premium logging tools. Developed new generation neutron porosity measurement systems for both open and cased boreholes.
·Redesigned hostile neutron tool’s calibration, ratio-to-porosity transform, and environmental correction algorithms and realtime software, resulting in significant improvement in porosity measurement accuracy.
·Developed enhanced vertical resolution processing algorithms / software for this neutron tool and integrated with gamma ray, density, and dual induction tool enhancements, thereby upgrading the commercial position of the entire hostile tool string.
·Optimized designs for new generation neutron logging tools for open and cased boreholes. ISO 9000 certifications pending. Achieved higher logging speeds, better accuracy, and lower costs.
·Revised calibration procedures for 6 ¾” LWD neutron tool and its sandstone response, improving measurement accuracy and satisfying clients’ concerns.
·Researched pattern recognition method to extract features from 2D images and demonstrated feasibility for automatic scanning of borehole acoustic images for fractures, cavities, and laminated sections.
WRT ENERGY SERVICES – HARC - The Woodlands, Texas 1993 - 1996
Provided scientific, hardware, and interpretative software for two novel gamma ray spectroscopy logging tools, both for through-tubing wireline applications.
·Applied classical dual-water model for analyses of oil, water, sand and clay volume fractions from capture gamma ray tool’s spectral data. Trained a neural net to provide the same analyses automatically. This was an industry first for slim through-tubing logging tools and neural net technology.
·Utilized both singular value decomposition and neural net methods for determining quantitative K, U and Th concentrations from natural gamma ray tool’s spectra data that worked in casing or in casing plus tubing. This was also an industry first.
·Demonstrated that BGO is superior to NaI(Tl) for carbon / oxygen inelastic gamma ray measurements with pulsed neutron generators.
HALLIBURTON ENERGY SERVICES - Houston, Texas 1983 - 1993
Senior Research Physicist (1987-1993)
Designed and optimized neutron logging tools for wireline and LWD applications; digital signal processing algorithms and software to enhance vertical resolution for neutron and density logging tools. Created unique model for dual-spaced neutron logging tools.
·Invented realtime digital signal processing method to improve the vertical resolution of density and neutron wireline logs via deconvolution. This industry-first provided competitive advantages for 350 field units.
·Optimized LWD neutron module and its calibration procedures, realtime logging software, and environmental corrections. Unique 3-D routine corrects porosity for borehole size and standoff.
·Designed premium neutron wireline logging tool featuring the best sensitivity and repeatability in the industry. 175 field unites manufactured from 1985-1990 remain calibrated and operational in 1999. Created algorithms for all environmental corrections and implemented realtime software.
·Developed pulsed neutron tool model for quantitative flood monitoring in cased boreholes - first to feature a true 3-phase analysis for oil, water and specific flood agent volume fractions.
·Created model for dual-spaced neutron porosity tools, making them ISO 9000 compliant. One of only two such models in the world. First accounting of neutron absorption by impurities in earth formations.
NL McCULLOUGH - Houston, Texas 1978 - 1983
Manager, Computerized Logging Systems (1980-1983)
Senior Research Physicist (1978-1980)
Provided scientific, software, and hardware design and development of realtime computer systems for logging trucks. Created interpretative software for a variety wireline applications.
·Managed staff of 24 during manufacture, installation, and maintenance of 15 computerized field units. Repackaged applications software for 11 wireline logging tools including gamma, neutron, density, cement bond, sonic delta-t, sonic wave form, and temperature.
·Designed, as Principal Architect, computerized logging system, including hardware configuration, system software, and application software written in unique language (Log11). Featured the first application of color graphics at the well site, with a unit cost of only $85,000.
·Developed a novel cement evaluation technique with a major oil company that reduced wellsite times from 10 to 2 hours. Completed 5 jobs in 6 months with revenues in excess of $300,000.
·Created dual-water model software package for chlorine and pulsed neutron logging tools. Performed 72 commercial cased borehole jobs in first year.
SCHLUMBERGER WELL SERVICES - Houston, Texas 1977 - 1978
Senior Software Engineer (1977 – 1978)
Designed software for sonic, electromagnetic and nuclear logging tools that featured control and feedback with the surface computer. Utilized DEC PDP-11 assembly language in prima facia realtime environment.
·Designed realtime software for new digital resistivity tool featuring 8 downhole measurements, each with a separate 3-point autocalibration procedure integrated with the logging application.
·Improved support for a pulsed neutron logging tool that featured 3 control / feedback loops with the surface computer. Installed true double-buffering scheme for cased borehole telemetry.
·Implemented software for an acoustic logging tool featuring 4 control / feedback loops.
·Debugged and improved system software support for the sonic waveform digitizer module.
TEXACO, INC. - BELLAIRE RESEARCH LABORATORY - Bellaire, Texas 1968 - 1977
Senior Physicist (1974 – 1977)
·Supported calibrated measurements for sulfur, calcium and aluminum logging tool that featured Cf252.
·Investigated a variety of thermal and epithermal neutron porosity measurement systems with different neutron sources including, Cf252, AmBe, PuBe, PoBe, AcBe, AmB, and 14-Mev generator.
·Provided realtime software for the very first dielectric / resistivity log outputs from input phase / amplitude.
·Established paradigm shift in carbon/oxygen logging with NaI(Tl) and pulsed neutron generators by increasing frequency from 1 kHz to 20 kHz utilizing a high-resolution Ge(Li) gamma detector.