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2015 ARKH-P3-Production Facilities

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ARKHANGELSK STATE TECHNICAL

UNIVERSITY

OFFSHORE FIELD DEVELOPMENT PROCESS,CONCEPTS

AND FACILITIES

OCT 2015

---------------

PART 3: OIL & GAS PRODUCTION TREATMENT &FACILITIES

---------------

Daniel Saincry

TABLE OF CONTENTSPART 3

WELL EFFLUENT

OIL TREATMENT

GAS TREATMENT

PRODUCTION WATER TREATMENT

2

OIL & GAS PRODUCTION SCHEME

Liquids Non-Associated

Gas

Gas Field

Gas

Water

Associated Gas

Oil

Unsaturated Oil Field

Oil

 

 

Water

Dome Gas

Associated Gas

Liquids

Oil

Gas

Saturated Oil Field

Oil

 

Water

3

3

COMPONENTS OF WELL EFFLUENTS

Inert gas : Nitrogen, Helium

Acid gas : H2S : Hydrogen sulphur, extremely corrosive and deadly CO2 : Carbon dioxide, corrosive

Hydrocarbons :

Light : C1 C2 C3 C4

Heavy: C5 . C6 . C7 … C10 ... C30 ...

( Paraffin, Naphtene, Aromatics, … )

Non Hydrocarbon components

Sulphur (mercaptans)

Nitrogen, Oxygen

Organo-metallic ( Asphaltene )

Water & Salt

Solids : Sand, Clay, Corrosion products ...

4

PRODUCTION OPERATIONS OBJECTIVES

To sell crude oil

To commercialize gas ...

(Long term contracts or spot sales..)

therefore :

Maximize hydrocarbons recovery from reservoir,

Meet required Export Specifications

Meet HSE objectives (Health, Safety & Environment)

Minimize Operating costs

Try to find synergies with other Production Facilities ...

5

THE PRODUCTION FLOW

Collection,

Treatment,

Storage,

Metering,

Export.

6

OIL & GAS TREATMENT

OIL

Separation

Stabilisation

Dehydration

H2S Removal ( stripping )

Desalting

GAS

Separation

Condensate stabilization

Sweetening ( H2S - CO2 )

Dehydration

Ethane,propane,butane recovery

7

OIL TREATMENT

8

OIL PRODUCTION FACILITIES SCHEME

 

HP gas

MP gas

LP gas

Associated gas

 

facility

 

compressor

compressor

compressor

 

 

 

 

(treatment unit)

 

Gas

 

 

Cooling

 

scrubber

 

 

 

 

 

system

 

 

 

 

 

 

 

 

LLP flare

 

 

 

 

Degassing

 

 

 

 

drum

Separator 1

Separator 2

Separator 3

Separator 4

Storage

tank

 

 

 

 

Free

Free

Free

RVP

 

 

 

 

water

water

water

spec

 

 

 

 

Crude oil

 

 

Crude oil

Cooler

Heater

Free

dehydration

production wells

(recommended)

& desalting

(if required)

water

 

 

 

 

 

 

 

 

 

9

TWO PHASE SEPARATOR

10

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