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Daniel E. Schwartz, LLC


Daniel E. Schwartz, PhD

is Owner of Daniel E. Schwartz, LLC and was Managing Partner of Black Fox Resources LLC, founded in 2017 and closed in 2019. Prior to establishing Black Fox, Schwartz was Technical Manager of Strategic Business Development, New Ventures, and Innovation at Aera Energy LLC in Bakersfield. He joined Aera as a secondee from Shell in 2009. Schwartz was with Shell from 1978 to 2014, rising in the organization from Research Geologist in Houston to Division Geological Engineer with Shell Western in California, then Head of Production Geology and Geophysics for Shell Expro in Aberdeen, Scotland. He returned to Houston in 1996 to become Technical Director in Pecten International. He then went on to leadership assignments in Shell, including Head of Deal Structuring in International Ventures, Director of International Producer Finance in Shell Capital, Chief Geologist of Shell Oil and Chief Petroleum Engineer of Shell International E&P, Inc. In 2016, Schwartz was elected Vice President of Sections for the American Association of Petroleum Geologists (2016-2018). He earned a PhD in Geology from the University of Texas at Dallas in 1978 and a Bachelors degree in Geology from the University of California, Berkeley in 1974.  Dan is a Certified Petroleum Geologist.

Jon Schwalbach

is a Geological Consultant Prior to joining Black Fox, Schwalbach was Senior Staff Geologist with Aera Energy LLC, Bakersfield, California. Schwalbach was a senior member of the exploration team creating a portfolio of drillable prospects. Previously he led the geological modeling effort for the Ventura Field tertiary recovery team. Before joining Aera, Schwalbach was a Geologist with Oxy California developing Monterey Formation reservoirs at Elk Hills Oil Field. Schwalbach was previously at ExxonMobil responsible for development geology of the Santa Ynez Unit, offshore California. Schwalbach is a globally recognized expert in the Monterey Formation, having published numerous papers and field guides examining rock properties and reservoir parameters. He obtained a PhD from the University of Southern California and a bachelors degree from Duke University.

Jeff Sande

is a Geological Consultant with over 33 years of experience in the oil industry, entirely in California. Prior to joining Black Fox, Jeff was the Manager-Development for Plains Exploration & Production / Freeport-McMoRan Oil & Gas. There he was part of the leadership team which proposed and implemented $200 MM to $400 MM drilling, development and field improvement budgets for 40,000 bopd gross assets. Jeff's geology team was responsible for "discovering" nearly 5000 bopd in new reservoirs, offsetting declining production from mature projects. Jeff began his career with Shell California where he gained extensive experience in steam flood and diatomite development projects, including drilling some of the first successful thermal horizontal wells in California. Jeff has proposed and drilled over a thousand wells as a geologist and supervised others in thousands more. He has a BS in Geological Engineering from the University of North Dakota and is a California Registered Geologist.

Terry O'Sullivan

is a Petrophysical Consultant. He is an accomplished petrophysicist with more than thirty years of exploration and development experience. As a Technical Consultant and lead petrophysicist for Aera Energy LLC from 1997 to 2017 his focus was on the evaluation of oil-in-place and optimization of recovery for existing and undeveloped oil fields in the San Joaquin and Santa Maria Basins. New technologies, for in situ evaluation of heavy oil viscosity by NMR, and for observation of the heavy oil recovery process, resulted in SPWLA publications and several patents. He was Technical Chair for the 2015 SPWLA annual meeting in Long Beach. Prior to Aera, O'Sullivan gained worldwide exploration and development experience at Ampolex (Australia), Maxus (Indonesia) and Unocal (Indonesia and Brea, CA). He has an BA in Earth and Planetary Sciences from Johns Hopkins University, and an MS in Geology from Wright State University.

R. K. (Rick) Prather

is a Reservoir Engineering Consultant with forty years of reservoir and production/operations engineering experience with Sun Production Company and Oryx Energy, ARCO Western Energy and Aera Energy. Rick has been responsible for surveillance, development, and optimization of reservoirs and wells in primary recovery, waterflood and steam injection projects located in West Texas and California. He has fifteen years of this experience applying reservoir simulation methods to steam injection, waterflood and primary recovery projects, primarily in California. Prather optimized and designed lift equipment, workovers and stimulation treatments. In reservoir engineering, he assessed aquifer water influx and predicted the impact of depressurization on steam injection projects.

Jeffery Milton

is a Geological Consultant with 38 years of experience in the oil and gas industry, 25 in California. Prior to joining Black Fox, Mr. Milton was Senior Staff Geologist with Aera Energy LLC, Bakersfield, California who most recently led the geoscience effort in the Strategic Business Development group. Milton brought deep development insights to many asset and corporate acquisition evaluations as well as being the lead geologist for Aera's Monterey Formation "shale play" from 2010 to 2014. He has onshore and offshore development experience from Shell California and Gulf of Mexico experience from Shell Oil in New Orleans. He has been involved in a wide variety of petroleum positions, ranging from Alternative Dispute Resolution on matters concerning O&G development on California's central coast, to expert witness testimony in Federal Court. Milton is a California Registered Geologist and has a BS in Geological Engineering from the South Dakota School of Mines.​

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