Development of Donghae-1 Gas Field, Offshore Korea

by

Han, Jeongmin

1 June 2006Korea Gas Corporation

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Reservoir Location

Uleung Basin58km away from Ulsan coast 1972, First Exploratory Drilling2004, Commercial Production Beginning

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Structurural Map

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Reservoir Properties

Depth: 2,600~2,700mPorosity: 0.25Water Saturation: 0.3Pressure: 3,600psiPay thickness: 100m

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Donghae-1 Gas Field

Reserves 250 bill CFT of Gas 2.6 MMbbl of Condensate

Daily Production 50 million cubic feetCondensate : 1,500 barrel per day

Production started July 2004Production Period 15 years, 2004-2018

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Production Facilities

Onshore Structures

Offshore Production Facilities

Pipeline

Subsea Production Facilities

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Export Pipeline Subsea

X-mas Tree

Onshore Terminal

Umbilical Line

B2

B3/B4

DH

-1-2

P W

ell

DH

-1-1

P W

ell

DH

-1-3

PW

ell

UTDA

DH

-1-4

P W

ell

B5

Infield Flowline

OffshorePlatform

Schematic View of Donghae-1 Gas Field

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Donghae-1 Gas Field

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Process Scheme

Offshore Facilities Pipeline Onshore Facilities

Bulk Water Separation

Gas Compression

Gas Dehydration

Liquid Dehydration

Sulg Catcher

Gas Dewpointing

Condensate StabilizationWater

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Production Facilities

Slug Catcher, Gas Dewpointing, Condensate Stabilization

Onshore Production Facilities

Sub-sea (14”x61km) Onshore (14”x7km)Export Pipeline

Bulk Water Separator, Gas Compressor, Gas Dehydrator, Liquid Dehydrator, Metering

Offshore Production Facilities

Production Facilities, Living Quarter, DeckPlatform

Well, 3 Sub-sea X-mas Tree, Flow-line, Production Control System

Sub-sea Production Control System

Main Facilities

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Sub-sea Production Control System

3 Subsea X-masTrees3 FlowlinesProduction Control SystemUmbilical Lines

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Platform

Production FacilitiesLiving QuarterDeck

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Offshore Production Facilities

Bulk Water SeparatorGas CompressorGas DehydratorLiquid DehydratorMetering

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Onshore Production Facilities

Gas/Condensate SeparatorSlug CatcherCondensate Stabilizer

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Concluding Remarks

Donghae-1 Gas Field, Offshore KoreaFirst Production of domestic-origin gas in Donghae-1 Gas FieldThe Possibility of Oil resources in the Korean OffshoreGas Storage in Depleted Gas Reservoir for future PNG