DNV Opera

7/29/2019 DNV Opera

1/16

OFFSHOre POWer SYSteM FOr tHe NeW era

DNV INNOVatION PrOjeCt 2012oil nd g induy

OPera

7/29/2019 DNV Opera

2/16

DNV hs lunchd concp fo oil nd gs compniso minin nvionmnlly sponsibl opions whilmximising un on invsmn

02 IDNV INNNOVatION PrOjeCt 2012I DNV OP I

DNV INNOVATION PROJECT 2012 as oil nd gs compnis xnd hi psnc omo nd ul-dp ws, on of hi min chllngs is o minin nvionmn-lly sponsibl opions whil mximising uns on invsmns. DNV is poposing wy of significnly ducing missions nd impoving pofis hough h us of shd pow souc.

7/29/2019 DNV Opera

3/16

Chllngs 4OP concp 6Min bnfis 12Ky fus 14

CONTENTS

7/29/2019 DNV Opera

4/16

Plfoms ypiclly fid wih lg nd hvy pow gnionquipmn dsignd o nsu dundn cpciy o m h highvilbiliy quimns. Howv, hs gnos ofnopd p lod, lding o high missions.

h chllngs


7/29/2019 DNV Opera

5/16

COMBINING RESPONSIBLE AND

PROFITABLE OPERATIONS

As oil and gas companies extend their presence

to remote and ultra-deep waters, one of their

main challenges is to maintain environmentally

responsible operations while maximising returns

on investments. The high electric power demands

offshore lead to environmental concerns and

trigger a quest for alternative power supplies.

DNV has devised an alternative power supply

concept, OPera, to meet demand for increased

power offshore.

INCREASING OFFSHORE POWER DEMAND

Large and remote fields in ultra-deep waters typi-

cally utilise FPSOs that may require more than

100 MW of capacity. The introduction of offshore

LNG production will increase topsides energy

needs. Furthermore, the increasing use of subsea

processing is driving power consumption trends

significantly. DNV is working closely with theindustry to qualify technology and develop

key standards for subsea power.

HIGH OFFSHORE EMISSIONS

At present, to meet the offshore power demand,

conventional FPSOs are fitted with substantial

power generation equipment. The power arrange-

ment typically consists of four gas turbine units,

one used at full capacity, and the remaining throttled

to meet the varying demand or otherwise reserved

for redundancy. This redundant capacity is neces-

sary to meet the high availability requirements of

each independent vessel. However, operating gas

turbines at low efficiency results in high fuel con-

sumption and elevated emissions.

SPACE-CONSTRAINED FPSOS

As large-throughput FPSOs typically have deck

areas crowded with equipment for water injection

and gas processing, available space becomes an

issue. This raises concerns related to available

lay-down and maintenance areas and room for

tie-ins of future fields.

DNV is therefore proposing a way of significantlyreducing emissions and improving returns on

investment in a cluster of field developments,

through the use of a shared energy source,

freeing deck space on connected platforms.

The result is DNV OPera, the Offshore Power

system for the new era.

Chllngsth OP concp

Min bnfisKy fus

7/29/2019 DNV Opera

6/16

OP consiss of floing pow hub nd n lcicl disibuion sysm,supplying pow o nwok of offsho insllions

the OPera concept


7/29/2019 DNV Opera

7/16

SHARED POWER SUPPLY

The OPera concept addresses the power demand

of several connected installations through the

introduction of submarine cables and centralized

power generation.

HIGHLY EFFICIENT POWER GENERATION

The 700 MW power plant recovers exhaust heat

from seven gas turbines to drive a second cycle of

three steam turbines, both cycles spinning electric

generators. This combined cycle configuration

increases power generation efficiency by approxi-

mately 16 per cent, compared with conventional

gas turbines alone. Together with consolidation

of power generation, allowing equipment to run

at optimal load, the result is a significant overall

reduction in emissions.

Depending on water depth, different hull designs

can support the power plant. To accommodate

the power equipment in ultra-deep water scenarios,

a semi-submersible platform is the ideal configu-ration.This platform is connected directly to a gas

export pipeline through a riser, providing a reli-

able supply of fuel. Where no pipeline infrastruc-

ture exists it could receive gas directly from the

producing installations.

RELIABLE POWER SYSTEM

Based on power system analysis, DNV

has dimensioned a robust system to supply

electricity to connected installations.

Transformers step up the voltage before the

power is distributed using 132 kV AC power

cables. To ensure supply reliability, the installa-

tions are connected in a closed loop configura-

tion, providing redundant connections.

The OPera concept utilises next generation

dynamic power cables for ultra-deep waters.

DNV is heavily involved with the industry,

maturing cable design to overcome the

challenges of tensile loads, dynamic response,

fatigue and installation of submarine cables.

Chllngsth OP concp

Min bnfisKy fus

7/29/2019 DNV Opera

8/16


tnsfoms sp up h volg bfo h powis disibud using 132 kV aC pow cbls.

th 700 MW combind cycl pow pln.

Smi-submsibl plfom fo hul-dp w scnio.

7/29/2019 DNV Opera

9/16

Chllngsth OP concp

Min bnfisKy fus

the OPera concept

th incsing us of subs pocssing is divingpow consumpion nds.

7/29/2019 DNV Opera

10/16


to nsu supply libiliy, h insllions conncd in closd loop configuion.

th OP pow hub cn b dsignd in diffnvins o m spcific nds.

Wih is cnlizd locion, OP llows impovmnsin opionl logisics.

7/29/2019 DNV Opera

11/16

Chllngsth OP concp

Min bnfisKy fus

DNV is hvily involvd wih h indusy, muing dynmic cbl dsigns.

OP incss vilbl dck spc on conncd plfoms, hough h liminionof pow gnion quipmn ddicd o oil nd gs pocss ing.

7/29/2019 DNV Opera

12/16

Wih OP, DNVs innoviv concp fo nwoking offsho insllions,oil nd gs compnis will now b bl o fos fuu of ducdmissions nd impovd pofis.

main benefits


7/29/2019 DNV Opera

13/16

REDUCED EMISSIONS AND

INCREASED REVENUE

OPera is an economically sound concept that

reduces emissions and permits additional revenue

from natural gas sales through the reduction ofgas consumption offshore. Additionally, it pro-

vides the potential for increased oil production

and improved design of connected platforms.

MORE DECK SPACE AVAILABLE

OPera provides several potential benefits for

the connected FPSOs. It increases available deck

space through the elimination of power genera-

tion equipment dedicated to oil and gas process-

ing. Significant increases in revenue could there-

fore be achieved with the installation of additional

processing capabilities, resulting in more oil

production from the same size FPSO.

Available deck space is especially valuable for

large-throughput FPSOs, which are typically

crowded with water injection and gas processingequipment. Freed area can be used for the

installation of redundant processing equipment,

additional lay-down and maintenance areas, and

for tie-ins of future fields. Increased spacing of

modules may also provide for improved overall

safety. Another option is smaller, less costly FPSOs

with shorter lead times.

IMPROVED LOGISTICS

With its centralized location, OPera allows

improvements in operational logistics, by

consolidating the location of power generation

personnel, maintenance and spare parts.

Other benefits include reduced noise on each

FPSO, making for a better working environment.

TAILORED TO SPECIFIC NEEDS

The OPera power hub can be designed in different

variants, such as a logistical hub, a centralized CO2

removal unit, or part of offshore LNG production.

Chllngsth OP concp

Min bnfisKy fus

avilbl dck spc cn b usd o dd oil pocssing

quipmn.

7/29/2019 DNV Opera

14/16

key features


addiionl vnu fom nul gs sls houghh ducion of gs consumpion offsho.

Fing up vlubl dck spc on conncd plfoms,fo incsd oil poducion, high dundncy, impovd sfy,fuu i-ins o oh vlu cing us.

Cn b ilod o spcific nds.

700 MW combind cyclpow pln.

rducd nd fo bckup pow cpciy.

132 kV submin cbls in closd loopconfiguion povids dundn conncions.

7/29/2019 DNV Opera

15/16

Chllngsth OP concp

Min bnfisKy fus

Impovd opionl logisics.

HoUstoN1400 rvllo DKy, tX 77449USaPhon: +1 281 396 1000

osLoVisvin 1NO-1322 HvikNowyPhon: +47 67 57 99 00

rIo De JaNeIroru S dSmbo,111/12 Floo20050006 rio d jnioBzilPhon: +55 21 3722 7232

oP [email protected]: +1 832-495-9467

DNV oFFICes

7/29/2019 DNV Opera

16/16

Det Norske Veritas as

NO-1322 Hvik, NorwayI Tel: +47 67 57 99 00 IFax: +47 67 57 99 11www.dnv.cm

Det Norske Veritas AS. Design and layout: Coor Media 1202-067. Animations p 6, 8-12, 14: Designimations. Print: Coor Media. Photo: Cover: Getty Images/ Wolcott Henry, p 2: Getty Images/Paul Avis, p 4: DNV/Knut Vadseth

tHis is DNV

DNV is a global provider of services for managing risk, helping customersto safely and responsibly improve their business performance. Our corecompetence is to identify. assess and advise on risk management. DNV isan independent foundation with presence in more than 100 countries.

DNV Opera

Documents

Transcript of DNV Opera