THINGS WE LEARN.

HSSE(Health Security Safety and Environment)

Essential geological information(explorations).

Drilling operations(offshore).

Kill fluid.

DST Tool.

Offshore drilling cost.

HSSE

Health security safety and environment.

Important terms.

Risk-is an uncertain event or condition that if it occurs ,has an affect on at least one.

Incident-is an unplanned, undesired event that adversely affects completion of a task.

Near miss-a scenario which ends safely but might well have ended in disaster.

HSSE

How to avoid any risk, incident and near miss.

Report any kind of hazard to the security officer who will take care of it.

Inform your working collie if you observe the risk situations.

Intervene and give help to your fellows.

Follow the working procedures.

Frequent check up of the equipment before using .

For the occurred incident, we do investigations to find the main course and correctness of the incident so that it will not happen again.

OICC-Observation Intervention compliant and collaboration .That's how BG group works to great a better working condition

KILLING FLUID.

Killing fluid(drilling fluid)-is the special mixture of fluid prepared for drilling operation and well completion.

Types of drilling fluid.

WBM(water based mud).

OBM(oil based mud).

KILLING FLUID.

How to prepare drilling fluid(OBM).

Oil based composition.

Oil.

Viscosities.

Filtration control materials

Weight material(densifiers).

Alkalinity.

Bridging materials.

Brine.

Emulsifier.

KILLING FLUID.

Mud test.

Mud weight.

We use pressurized mud balance to know the density of the mud in ppg(pound per gallon).

Rheology.

This is done to study the behaviour of the mud at the well during drilling operations.

With the use of the viscometer we know how drilling fluid behaves.

Chemistry of the drilling fluid.

BAD test-used to test if water contains other chemicals.

Alkalinity.

Chloride content.

Calcium content.

KILLING FLUID.

Calculations.

Oil water ratio(OWR).

Percentage water.

Percentage oil.

Percentage solids.

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KILLING FLUID

Mud plant.

Facilities.

Cello

Cutting bottle.

Pumps.

Key side( manfold).

Dust collector.

MUD PLANT.

Preparation of additives

Storage of additive & prepared

mud.

Delivery and

discharge

Mud tests

DRILLING OPERATIONS

Rig move and preparation.

To put the drilling ship in position.

Satellite reference.

Reference at the ground(use of hangles).

Dynamic position 3D.

Problems

Loose power(blackout).

Wind movement.

DRILLING OPERATION

Well schematics.

DRILLING OPERATION

First phase drilling.

Drilling fluid is sea water.

To the depth of about.

Run surface casing and cementation.

Installation of well head, run BOP and riser and test.

BOP is very essential as the backup during drilling activities.

DRILLING OPERATION

Second phase drilling.

Mud (OBM).

BHA, the drilling bit is small compared to the first phase drilling.

Casing(conductor casing) and cementation.

DRILLING OPERATION

Drilling hazards.

Num Hazard Remarks

1 seabed Slope should be 1.2degree.Check if it is soft or hard .

2 Loss circulation Control the mud weight

3 Hard drill Side track

4 Fault crossing Side track

5 kicks Check the mud condition if the kick is low.

DRILLING OPERATION

Pressure control.

Formation pressure.

Hydrostatic pressure.

Pressure condition

Overpressure.

Balanced pressure.

Under pressure.

Note; always we drill in overpressure condition.

WELL EVALUATION.

Drill stem testing.

Definition;

is the method of gathering data on the potential productivity of a reservoir before installing permanent completion string, where conducted in open or cased well.

DST is primary used to;

Isolate the target zone.

Control well flow.

Convey fluid to the surface.

Acquire down hole data.(pressure and temperature).

Note; DST tool is run once hydrocarbons is detected on the cuttings at the surface.

WELL EVALUATION

Down hole pressure that affect down hole testing.

Cushion pressure(Pc).

Formation pressure(Pf).

Hydrostatic pressure(Ph).

Pc<Pf<Ph during down hole testing

DST can be run in a open or cased well.

WELL EVALUTION

Important tools.

Tubing.

Valves(testing valve and circulating valve)

Perforating gun.

Packers.

Drill collar.

Radioactive sub.

Surface read out.

Reference tool.

WELL EVALUTION.

Principle working.

General steps for ending down hole test are as follows.

Open the reversed circulating valves .

Flush (reversed circulate out) hydrocarbon from drill pipe or tubing.

Close the reversing valves.

Open the tester valves.

Pump mud into the test string to kill the tested interval.

Unseat the packers.

Pull the string out of the well.

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OFFSHORE DRILLING COST.

Cost categories.

OFFSHORE COST

MATERIALS

EQUIPMENT

INSTALLATION

CERTIIFICATIONCONTIN

GENCY

PROJECT MANAGEM

ENT

ENGINEERING

FREIGHT

MANUFACTURE

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ASANTE SANA