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Data Logging and Geological Information

Competency Statement:

Understand the data gathering responsibilities of the Well Site Operations Geologist during drilling operations. Design well logging programs and other data collection programs (e.g. coring) for exploration and appraisal/development drilling programs. Determine the necessary evaluation programs to collect data for a Reservoir Geological Model.

Learning Objective:

  • Specify well logging and mud logging requirements including: cuttings collection intervals, sampling preparation, hydrocarbon indicators and lithology reporting.
  • Use Daily Drilling Reports and Daily Geological Reports
  • Design a coring program and specify procedures for sample collection, handling and analysis.
  • Identify other data collection services (e.g. fluid sampling) that maybe needed for successful well evaluation.
  • Prepare and interpret well completion logs and Final Well Reports.
  • Propose evaluation programs for appraisal wells after exploration discovery well

Assignment Instruction:

Beta Petroleum is drilling the Gama 1 "wildcat" exploration well on the Gama structure prospect in the New Basin. If this first exploratory well is successful, three additional appraisal wells may be drilled to determine the potential size of the discovery. As the Well Site Operations Geologist you will be involved in all phases of the drilling program:

  • Understand the objectives of the wells and subsequent evaluation programs.
  • Design well logging programs and other data collection programs (e.g. coring) to collect data for a Reservoir Geological Model.
  • Monitor and report progress on the drilling of wells to management and the exploration team.
  • If the Gama 1 well has hydrocarbons and reservior based on mud log and drilling results, determine the changes needed to the initial data collection program.
  • Describe the priority of additional evaluation data to balance enhanced evaluation requests with available funds in the budget.
  • Propose data acquisition and evaluation programs for appraisal wells.

Refer to materials in References and Field Data and read topics in Background Knowledge as needed to complete the assignments.

Proposed Gama 1 Well Location on Gama Structure Prospect Map

Fig.1 Example Prospect Map