Surface Well Testing Presentation_new (1)

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Presented by: Mirza AhsanInternETS

SURFACE WELL TESTING(SWT)

Tubing ConveyedPerforation (TCP)Drill Stem Testing (DST)

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DST Introductoin

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The primary DST functions, whetherconducted in openhole or casedwells, are to:

Isolate the target zone.

Control well flow.

Convey fluid to surface.

Acquire downhole data.


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Surface Well Testing

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WELL TESTING is the only techniqueexamining a significant portion of thereservoir under dynamic conditions to

determine its production capabilities andreservoir properties.


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SWT General layout

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Flow Head

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It supports the weight of the teststring.

It allows up-and-down androtation movement of the teststring.

It flows out of the well through aflow valve.

It allows to pump fluid into thewell through a kill valve.

It allows tools to be introduced


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Flow head-Configuration

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The 4 gates valves:

Swab valve: to run tools in downhole.

Master valve: to isolate the surfaceequipment from the downhole string. Itis the first valve at surface to control thewell.

Kill valve: to inject fluid (mud) to kill thewell or acid to improve well production.

Flow line: to control the flow. Normally

closed.


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Flow Head-Description

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1010


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Flow Head-Swivel

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It allows rotationof subsurfaceequipment.

It supports theweight of the drill

string thanks toroller bearings.

It supports also

the weight of the


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Flow Head-Four common operations

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Build up and set packer

Drawdown

Killing and acidizing

Running tools downhole


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Choke Manifold

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q Four gates valves

q A fixed Chokeq An Adjustable

Choke

q Tapping points formeasurement upand down streamchoke


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Main functions of ChokeManifold

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s Safety function: control of the well headpressure.

s Allows different choke sizes: control theFLOWRATE.

s Prevents water and gas coning:limitation of flow rate.


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Choke Manifold

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Adjustable Choke Fixed Choke


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Emergency Shut DownSystem

Well closure: The ESDinitiates well closure whenthe pressure in the flowline either rises above ahigh-level threshold or fallsbelow a low-levelthreshold.

The ESD is mandatory

when the wellheadpressure exceeds 5,000psi, whenever H2S ispresent, or in highpressure/temperature/flowrate conditions.

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Separator

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17q Pressure vessel used to separate well

fluids into gaseous and liquidcomponents.


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Separator-Design

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18Types

Two phase - Gas and liquids

Three phase - Gas, oil and water

Designs

Horizontal

Capacity, separation efficiency, maintenanceVertical

Less floor space, foreign material, liquid levels

Spherical


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Separator

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19 Must be able to handle exploration wells

where the nature of the fluids is notknown prior to the start of the test.

Must be able to deal with light oil, heavyoil, foaming crudes, gas condensate,waxy crudes.

Must be able to cope with H2S andpossibly CO2


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Separator

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20The Separator will provide a means for

metering of the various fluids

permit sampling of the fluids

allow for the removal of water from the oil

containing the pressure safely within thepressure envelope


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Separator

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21

f


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Separator-Safetyinstruments

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22 Automatic Control Valves

Non Return Valve

Cork Valve Sight Glasses

il


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Separator-Gas & OilMetering

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23 Gas Metering

Daniel Orifice Meter

Oil Metering

Rotron vortex meter

Floco positive displacement meter


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Gauge tank

Storing liquids when pressure is low

Storing liquids when large samples are required

Metering liquids when flow rate is low

Calculating the volume correction factor at the tank tocalibrate oil meters

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-Meter

factor.-Shrinkagefactor.


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Surge tank

Whenever H2S is expectedto be in the well effluent, asurge tank must be usedinstead of a gauge tank.

Storing liquids whenpressure is low

Storing liquids when largesamples are required

Metering liquids when flowrate is low

Calculating the volumecorrection factor at the

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-Meterfactor.-Shrinkagefactor.


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Oil Manifold

The oil manifold linksthe separator to thetank, the transferpump, and theburners. It allows oilleaving the separatorto be diverted to thetank or the burners, orsent directly to a

production line.

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S.W.O.T Analysis:

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28 Strengths:

Cutting-Edge Technology

Global Experience, Local knowledge &expertise

High Quality of service

Maximum Satisfaction & Retention ofclients

In time job completion

Affordable service cost to clients


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S.W.O.T Analysis:

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29 Weaknesses:

Lack of Backup equipment

Lack of Specifically designed Trainee Engineer

Program

Limited infrastructure as compared to competitors

Limited Services available for clients

Lack of Research & Development budget, Policies& well defined procedures


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S.W.O.T Analysis:

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30 Opportunities:


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S.W.O.T Analysis:

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31 Threats:

Strong Competition in Industry

Limited Infrastructure

Loss of business due to limited infrastructure &services provided to the client

Lack of confidence in services from safety

conscious clients


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Surface Well Testing

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Surface Well Testing Presentation_new (1)