Evaluation of Intersect for polymer flood full field simulations - - PowerPoint PPT Presentation

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Nov 27, 2023 423 likes •593 views

Evaluation of Intersect for polymer flood full field simulations Konstantin MONASTYREV Adolfo HENRIQUEZ Senior adviser Senior adviser Petoro AS Petoro AS Stavanger Norway Stavanger Norway Presentation overview Information about the

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Evaluation of Intersect for polymer flood full field simulations

Konstantin MONASTYREV Senior adviser Petoro AS Stavanger Norway Adolfo HENRIQUEZ Senior adviser Petoro AS Stavanger Norway

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Presentation overview

Information about the oil field
Business case of early polymer injection
Reservoir simulation challenge
Setup of INTERSECT evaluation
Results of INTERSECT evaluation
Way forward
Q&A

2 INTERSECT evaluation – early polymer injection on Norwegian continental shelf

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Polymer injection from day one

Green field
2 main formations –

– High perm upper and low perm lower – Most of STOIIP in upper formation

Permeability contrast

– 10-15 fold

Pressure support

– Weak to non present aquifer – Undersaturated oil with low GOR

Unfavorable mobility ratio = 5
Development concept

– Mixed, platform plus subsea

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Polymer injection is new method for

NCS

EOR – how to get optimum well

pattern?

Costs of implementation are high

– Need to have a strong business case – Implementation is time critical

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Targeting remaining oil in the field

Water injection Polymer injection

RF

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Detailed full field simulation is a key

Run times > 1 week for desired

resolution

ECLIPSE Parallel or Multiple

Realisation runs or LGRs won’t help!

Sector model or coarse model?
Risk of decision delay

– Decision based on «simplified problem study»

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Elapsed model run time with different grid resolution

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New simulation technology for new oil field

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ECLIPSE and INTERSECT give similar results

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INTERSECT ECLIPSE

Water flood simulation

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Addressing behavior difference

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IX has E300 defaults IX with E100 switch (new feature*)

Reservoir pressure difference Field oil production rate Field oil production rate

INTERSECT ECLIPSE

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ECLIPSE INTERSECT

y = 4069,4x3 - 716,54x2 + 106,68x + 0,3964 R² = 0,9999

2 4 6 8 10 12 14 16 0,05 0,1 0,15 0,2

viscosity(cp) Polymer concentration(wt%)

Polynomial fit of the experimental data (FP5115 VHM)

Polymer injection in INTERSECT

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Agreement of results for polymer injection

Good agreement between

ECLIPSE and INTERSECT

Different formulation for polymer

adsorption in INTERSECT

– ECLIPSE vs rock mass – INTERSECT vs water mass

Good agreement for polymer

adsorption using some tuning

– Adequate results with different adsorption rates

INTERSECT evaluation – early polymer injection on Norwegian continental shelf 10 Oil production rate

Polymer production rate

Polymer adsorption cummulative

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New technology saves run time

Coarse model with polymer:

– 9h vs 15h serial – 0,5h vs 2h @ max parallel

Detailed model with polymer:

– 6.1 M cells, 30x30m grid – 5.5h vs > 1 week @ max parallel

Effective handing of LGRs

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Polymer concentration in detailed FFM

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INTERSECT shows better scalability

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refined 5x5 sector model with polymer injection

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Great potential for business case

ptimisation

Polymer concentration development in detailed and coarse gridded regions

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Way forward and recommendations

INTERSECT is mature reservoir

modeling technology

Petoro is considering use of

INTERSECT for future studies where speed and scalability of INTERSECT will be critical:

– EOR studies – Geological scale simulation – Replacement of «reservoir coupling» model with full field grid

INTERSECT is not a «silver bullet»
it is tool for complex problems:

– ECLIPSE is still a tool of choice for conventional models!

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INTERSECT parallel run domains

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Questions

Valuable contributors to the project

Adolfo Henriquez (project owner – Petoro)
Hamid Nasiri (EOR expert – Petoro)
Taoufik Manai (Schlumberger)
Alexander Shadchnev (Schlumberger)
Alan Thompson (Schlumberger)

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