Responsibilities for Evaluation Operations

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This article describes the responnsibilities for planing and safety, logging, Pipe conveyed logging(PCL), coring, mud logging, FST and Cement evaluation logging.

Planning and Safety

The Drilling Supervisor shall ensure:

  • all personnel are familiar with the mandatory requirements for explosive and radioactive materials, (explosive magazines and radioactive stores shall be set aside in a designated, marked area away from the camp and rig traffic)
  • the senior representative of the Logging Contractor and his crew are familiar with both Company and Contractor’s safety procedures, (the Drilling Contractor shall ensure that all personnel are aware of the dangers of radioactivity and explosives)
  • all persons not directly involved in the tasks are kept well away from sheaves, cable and the winch drum when tools are being run and logging tools at surface
  • loads are not moved across the cable when logging operations are in progress
  • the hole is covered at all times unless a tool is being run in the hole. A slotted hole cover shall be installed whilst running logs.

Logging

Responsibilities for open hole evaluation tasks are given in the following table:

Action

Execution

Quality Control

Specify logging requirements

Petrophysicist

Operations Engineer

Specify logging techniques and integrate in Drilling Programme

Petrophysicist

Operations Engineer

Arrange call-out of logging equipment and personnel

Drilling Supervisor Logistics Supervisor

Operations Engineer

Rig up, keep hole full

Drilling Contractor

Drilling Supervisor

Run tools and obtain logs of the specified quality in accordance with company procedures and policies

Logging Contractor

Drilling Supervisor/ Wellsite Geologist

Safety during logging

Logging Contractor

Drilling Supervisor

Fishing for logging tools

Logging /
Drilling Contractor

Drilling Supervisor

Quality control during logging

Logging Contractor

Drilling Supervisor/ Wellsite Geologist

Provide logging results

Logging Contractor

Wellsite Geologist

Revise the Logging Programme

Petrophysicist

Operations Engineer

Report/fax/modem logs/hand carried

Drilling Supervisor/ Wellsite Geologist

Operations Engineer

PCL Logging

The general responsibilities for PCL logging are given in the following table:

Action

Execution

Quality Control

Ensure Accurate depth control

Drilling Contractor

Drilling Supervisor

Ensure integrity and correct operation of equipment

Logging Contractor

Drilling Supervisor

Safety during operations

Logging Contractor / Drilling Contractor

Drilling Supervisor

Rig-up, drillstring handling procedures and co-ordination with logging crew

Drilling Contractor

Drilling Supervisor

BHA selection

Logging Contractor / Drilling Contractor

Drilling Supervisor

Driller/winch operator
co-ordination while running latched tools

Logging Contractor / Drilling Contractor

Drilling Supervisor

Tool/BHA dimensional check, including OD/ID’s of all equipment in use

Logging Contractor / Drilling Contractor

Drilling Supervisor

Coring Operations

The general responsibilities for coring operations are given in the following table:

Action

Execution

Quality Control

Specify coring points, core lengths and special requirements

Wellsite Geologist

Operations Engineer

Approval to pull out to core

Wellsite Geologist

Drilling Supervisor

Make up core barrel

Coring/Drilling Contractor

Drilling Supervisor

Cutting core

Coring/Drilling Contractor

Drilling Supervisor

Recording parameters

Coring/Drilling Contractor

Drilling Supervisor

Core recovery

Coring/Drilling Contractor

Drilling Supervisor/ Wellsite Geologist

Core description

Wellsite Geologist / Logger

Petroleum Engineer

Packing and shipping core

Wellsite Geologist / Logger

Drilling Supervisor

Core Report

Wellsite Geologist / Logger

Petroleum Engineer

Mud Logging

The general responsibilities for mud logging are given in the following table:

Action

Execution

Quality Control

Co-ordinate mobilisation of equipment and personnel

Drilling Supervisor Logistics Supervisor

Operations Engineer

Prepare unit for start-up

Mud Logging Contractor

Drilling Supervisor

Ensure unit safety

Mud Logging Contractor

Drilling Supervisor

Calibrate equipment

Mud Logging Contractor

Wellsite Geologist

Conduct services in scope of work

Mud Logging Contractor

Drilling Supervisor

Prepare mud logs and daily report

Mud Logging Contractor

Drilling Supervisor / Wellsite Geologist

Fax mud logs and report to Operations Geologist

Mud Logging Contractor

Drilling Supervisor / Wellsite Geologist

Prepare and package cutting samples for transport

Mud Logging Contractor

Drilling Supervisor / Wellsite Geologist

Formation Strength Test

Formation strength tests are directly supervised by the Drilling Supervisor.  The main responsibilities are given in the following table

Action

Execution

Quality Control

Determine maximum and minimum required pressures

Operations Engineer

Head of Onshore / Offshore Engineering

Test and service surface equipment

Drilling Contractor

Drilling Supervisor

Treat drilling fluid and clean the hole

Drilling Contractor

Drilling Supervisor

Conduct the test

Drilling Contractor/ Cementing Contractor

Drilling Supervisor

Record test parameters, make calculations and report

Drilling Supervisor

Operations Engineer

Cement Evaluation Logging

The general responsibilities for cement evaluation logging are given in the following table:

Action

Execution

Quality Control

Special requirements

Operations Engineer

Head of Onshore/Offshore Operations

Specify logging techniques

Operations Engineer

Head of Onshore/Offshore Operations

Arrange call out of logging equipment

Drilling Supervisor Logistics Supervisor

Operations Engineer

Run tools and obtain logs of the specified quality

Logging Contractor

Drilling Supervisor

Provide logging results and interpretation advice

Logging Contractor

Petrophysicist

 

 

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