Development Geology

Trainer(s): Evert Uitentuis
Duration: 5 days

Business context

A profitable development of an oil or gas field starts with a good understanding of the subsurface. As part of a PE team the development geologist interprets subsurface data and provides geological models that form the basis for development planning.

During this course the "Development Life Cycle" starting with the gathering of geological data, the interpretation thereof, the preparation of geological models and the quantification of subsurface uncertainty are discussed. The development geologist is equipped with the skills to construct these models. Attention is given to the impact on field operations and on field management during its entire lifecycle.

Who should attend

Petroleum engineers and geologists involved with exploration and development of oil and gas reservoirs. Participants need a basic understanding of Reservoir/Petroleum Geology and preferably some 2 - 4 years experience.

Course content

  • Planning, gathering and management of geological data
  • Geological concepts, global tectonics
  • Geophysical methods, production seismic
  • Sequence stratigraphy, log correlation
  • Environments of deposition (clastic, carbonates)
  • Mapping of reservoir parameters and structure
  • Structural styles, trapping conditions
  • Reservoir fluids, initial conditions
  • Reservoir Architecture, geological modeling
  • Oil and gas volumetric calculations
  • Subsurface uncertainty and risk analysis
  • Case histories
  • Vertical and horizontal well applications, operational geology
  • Field excursion (optional): illustration of clastic and carbonate  sedimentary environments and structural geology in 3-D.

Learning, methods and tools

At the end of the course participants will be able to apply geological concepts, construct maps and sections and validate computer-generated interpretations.

In addition they will:

  • be able to calculate subsurface volumes and assess the uncertainties.
  • learn about the contents of a well proposal.
  • be able to plan appraisal wells and assess their economic value.
  • acquire practical experience by working on an actual field study in teams
  • better understand their own role in the development life cycle.

Next to the exercises quoted in the course schedule (relating to the Robin Field), other dedicated exercises are included throughout the course to ensure participants understand the concepts discussed.

Day by day programme

Day 1

Introduction & Course Overview, The energy business, Development projects, subsurface data

Oil and gas development projects

Robin Field: Team Exercise 1, Project activities planning

Petroleum Geology Introduction of Interest to the Development Geologist:

  • Depositional Environments (Sedimentology)
  • Correlation Methods: Sequence Stratigraphy
  • Structural Geology
  • Petroleum Systems: Hydrocarbon generation - migration - analysis

Various Group Exercises (Correlation and Field Appraisal)

Day 2

Subsurface Models, Input Data and Concepts

Seismic data, acquisition, processing and interpretation

Robin Field Exercise 2, Field Appraisal planning

Structural types, traps, fault seals, maps and sections

Robin Field Exercise 3, Correlation

Clastic sedimentary environments

Robin Field Exercise 4, Seismic well data structural map, cross section

Day 3

Measurements and Evaluation of Subsurface Data

Basic well technology, horizontal wells, well data

Log and core data, acquisition, analysis, interpretation, uncertainties and mapping

Reservoir Properties (porosity - permeability, rock strength etc)

Robin Field Exercise 5, Net sand mapping

Carbonate reservoirs (optional)

Subsurface pressures: Robin Field Exercise 6, Contacts

Day 4

Subsurface Development Options

Volumetric Assessment, subsurface uncertainties (Geo-statistics)

Robin Field Exercise 7, Volumetric Calculations

Subsurface development planning

Robin Field Exercise 8, Static and dynamic models

Day 5

Field Operations and Development

Well Design: Geological input

Robin Field Exercise 9, Surface Development Options, Project Planning

Basic project economics and financial performance indicators

Robin Field Exercise 10, Economics; Determining project economics and sensitivities using an Excel economics spreadsheet.

Course review and round-up