About Us

Our Company

PayZone Inc. (PZI) was founded in 2002 by Deborah M. Olson, formerly a partner in Digital Petrophysics, Inc. (DPI). For over 30 years our principals have been solving reservoir problems by integrating geology, petrophysics, and engineering with innovative technology. We offer comprehensive reservoir evaluation services, including:

  • Geology and geophysics
  • Reservoir modeling
  • Petrophysical analysis (including cased hole) and field studies
  • Image log interpretation
  • Reservoir engineering and management, field development planning

Clients include a number of major oil companies, including Occidental, Chevron, Shell, Mobil, and Exxon.  We have also worked for a number of independent operators on both exploration and development projects, both domestically and internationally

Our staff and associates include senior professionals each with 25 to over 40 years of experience in petroleum geology, log analysis, petroleum engineering, geophysics, and wireline operations.  We have diverse experience in many areas around the world, including North America, the Middle East, South America, and Asia. We have worked with many different reservoir types and fields from initial discovery through redevelopment, EOR implementation, and evaluation for acquisition or divestiture.

Our Staff and Selected Associates

Deborah M. Olson, President, Geologist/Petrophysicist

Thomas M. Howard, Vice-President, Geologist/Image Log Analyst

Lonnie A Kerley, Senior Operations/Production Engineer, LAK Consultant LLC

Tracey L. Fleming-Reese, Senior Geologist

William R. (Rick) Berry II, Geologist/Petrophysicist and Senior Advisor to PayZone

President, PayZone Inc.

Ms. Olson, President and co-founder of PayZone Inc., has over 30 years of experience in development geology and petrophysics including extensive knowledge of computer applications. She has broad experience in conventional and thermal oil projects. Her primary areas of expertise are:

 - Reservoir characterization inclusive of geologic correlation, mapping, 3-D structural modeling, and petrophysical evaluation
 - Thermal project support
 - Integration of geological, petrophysical, and engineering data into reservoir models
 - Management of large petrophysical/reservoir evaluation projects (400 to 1000+ wells)
 - Petrophysical analysis of shaly sands and biogenic siliceous reservoirs, and mixed sand/siliceous sequences
 - Expert witness and equity work
 - Development of petrophysical software
 - Training in advanced shaly sand log analysis and field study methods
 - Creation and management of large project databases

Deborah is California Registered Geologist #4198 and a member of AAPG, SPE, SPWLA and GSA.

Geologist/Petrophysicist/Image Log Analyst

Mr. Howard has over 25 years of diverse experience in the petroleum, groundwater, geotechnical, and environmental industries throughout North America and various international locations. His primary areas of expertise are:

 - Borehole-image analysis
 - Planning and management of borehole-image data acquisition projects
 - Petrophysical database management
 - Old electric log interpretation
 - Well-site logging operations
 - Field studies and project management
 - Training in the use of old electric logs
 - Oil and gas exploration
 - Application of petrophysical analysis methods to ground water and environmental studies

Mr. Howard is manager of PayZone's image log interpretation team. Tom is a member of SPWLA, AAPG, HGS, and WTGS, and served as president of the local chapter of SPWLA 2013-2016.


Senior Geologist

Ms Fleming-Reese has over 30 years experience in development and exploration geology, field operations, geomodeling, project management, and training/skills improvement. Her primary areas of expertise are:

- Development geology projects in a wide variety of reservoir types, including light/heavy oil, gas, and shale 
- Offshore and onshore operations
- Training/mentoring of younger professionals
- Geomodeling
- Project management

Tracey is a member of AAPG

Emeritas Advisor to PayZone Inc.

Mr. Berry has an extensive background in geology, petrophysics, and oil & gas economics with over 40 years of petroleum industry experience in California, North America, and numerous international petroleum arenas. Some of his areas of expertise are:

- Recognized expert in shaly sand log analysis
- Production and exploration geology
- Implementation and management of petrophysical field studies
- Derivation of reservoir properties in challenging formations such as freshwater shaly sands, heavy oil, and all phases of diatomite containing all grades of oil
- Integration of geological and engineering data with petrophysics
- Expert witness and equity work
- Oil & Gas project economics
- Oil & Gas equity determination
- Planning & management of wireline & mud logging programs in exploration and development drilling projects
- Design & implementation of advanced petrophysical analysis software
- Business management
- Teaching industry courses on shaly sand log analysis and field study methodology

Although semi-retired, Mr. Berry still provides technical expertise, project management and software engineering services as needed and is co-owner of PayZone Inc.. He is California Registered Geologist #3903 and a member of AAPG, SPE, and SPWLA.

Senior Production/Operations Engineer

Mr. Kerley has over 30 years of experience in drilling/completions and operations management.  He has worked primarily in California with a very diverse range of production types and wells, including deep light oil to shallow thermal from both sand and diatomite/siliceous reservoirs.  He has managed daily engineering activities for leases with 2000+ BOPD of production, including well workovers, lift systems, stimulation design, thermal injection (steamflood and cyclic steam), and waterflood projects. Some of his areas of expertise are:

- Field production operations
- Thermal and waterflood EOR management
- Analysis of production tasks to achieve continuous improvement and cost control
- Preparation of drilling and completion programs and field supervision of well work
- Ongoing analysis of the effectiveness of well completions and lift systems, recommendations for improvement
- Effective integration of wellbore and reservoir factors to identify and resolve production problems

Mr. Kerley is a member of SPE, AADE, and API