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

Most Read

Latest

Responsibilities for Evaluation Operations