Workflow for Finding Bypassed Reserves in Mature Assets Real Time Integration of Simulation, Seismic Interpretation, and Geophysics Best Answers Possible

Workflow for Finding Bypassed Reserves in Mature Assets

Real Time Integration of Simulation , Seismic Interpretation, and Geophysics

Best Answers Possible Simulation matches dynamics Geology matches statics and dynamics

Integration of Seismic, Geoscience and Reservoir Simulation Almost Never Applied

Not Practical Work flow in each disciplines historically takes

months to years Answers needed in weeks to months to add

value

A good answer on time is better than a perfect answer too late

Reality Today

Data Analysis System Requirements Easy to Use Windows Based Mapping/Simulation

Packages

Designed for all engineers Not just the expert

Easy integration of geology Apprentice mapping package

Interpretations for simulator in hours

User friendly simulation analysis system Merlin - easy to use windows based pre / post

processor Quick results

Mapping Package FeaturesDigitize maps with mouse or

tablet

Import wizard to import maps from other programs

Mapping Package Features

Flexible gridding

Mapping Package Features

Data Analysis System Features

PVT/Kr correlations

Waterflood pattern models in minutes

Place horizontal and vertical well trajectories with the mouse



Contour maps and cross sections


3-D fences and fields

Data Analysis System FeaturesTernary colors

Evaluation of Mature Asset with Quantitative 3-D Seismic

Gemini Solutions, Inc..

Objective:

in partnership with Energy Outpostassess drilling prospects for the Mature Gulf Of Mexico Prospect

Introduction:

5 major sands investigated: Sand 1, Sand 2, Sand 3,Sand 4, Sand 5

Highly faulted and compartmentalized environment:a total of 52 reservoirs/fault blocks

24 reservoirs/fault blocks with production historyand 29 wells/completions

A total of 64 independent reservoirs/fault blocksinitialized and simulated to arrive at final results.

Introduction (cont.):

Reservoir models initialized on the basis of:

- structure, gross thickness, net thickness, and porosity maps developed by Energy Outpost

- available reservoir data from property/prospects files (PVT, well test, completion data, etc.)

- assumption of relative permeability, and permeability

All sands simulated on identical 53x46x3 variable size grid

Introduction (cont.):

Reservoir history match performed for every fault blockwith production history, within the focus area.

Reservoir history match results resolved with EnergyOutpost interpretations (iterative process of model definition and enhancement).

Final models used to approximate hydrocarbons in placefor prospect areas, and to approximate recovery.

Sand 1 Sand Model Structure Map

Sand 1 Sand Model Net Thickness Map

Sand 1 Sand Model Region Definition Map

1

2

3

4

56

78

Sand 1 Sand Model Well History Match

Sand 1 Sand Model Saturation map at initialization

Sand 1 Sand Model Results of modeling

1

2

3

4

5

6

78

Region InitializationData

OOIP,MMstb

OGIP, Bscf Cum. OilProduction,

Mstb

Cum. GasProduction

MMscf

ProductionPeriod,

daysDeveloped

7 Field data 0 3.27 - 2954 -Total

Developed0 3.27

Prospects1 WOC 0.17 0.07 95 49 8813 GWC 0 2.38 0 1834 6385 GWC 0 3.19 0 2573 8816 GWC 0 2.56 0 1974 547

TotalProspects

0.16 8.20 95 6430 -

6.4 BCF reserves in

compartments 3, 5, 6




1

23

4

56

7

8

9

10

11

12

13 1415

Sand 2 Sand Model Well history match

Sand 2 Sand Model Oil Saturation map at initialization

Simulation Identified

Leaking Faults

Sand 2 Sand Model Gas Saturation map at initialization


1

23

4

56

7

8

9

1011

12131415


OOIP,MMstb


Mstb

Cum. GasProduction

MMscf

ProductionPeriod,

daysDeveloped

1 Field data 0.41 1.90 51 124 -2 Field data 4.08 2.50 1194 724 -3 Field data 0.08 0.09 22 40 -4 Field data 1.45 2.44 291 807 -5 Field data 0.51 0.56 171 415 -6 Field data 1.02 0.80 197 198 -7 Field data 2.49 1.49 1119 656 -8 Field data 0.23 2.37 7 1483 -9 Field data 0.18 0.33 16 259 -

10(1-5X) Field data 0.58 0.54 162 265 -Total

Developed11.03 13.02

ProspectsWOC

Initialized11 WOC 0.50 0.30 291 251 79012 WOC 0.78 0.47 234 364 160013 WOC 0.28 0.17 86 130 608

Total WOCinitialized

1.56 0.93 611 745 -

ProspectsGWC

Initialized11 GWC 0 0.75 0 703 18212 GWC 0 1.18 0 1013 243

Total GWCinitialized

0 1.93 0 1716 -

ProspectsInitialized

ByReference

14 Region 13 0.81 0.48 161 296 45614 Region 4 0.48 0.41 92 342 273

3.1 BCF reserves in 4

compartments




1

2

3

4

5

6

7

8

9

10

11

12

13

1415 16

17

Sand 3 Sand Model Oil Saturation map at initialization

Sand 3 Sand Model Gas Saturation map at initialization


1

23

4

5

6

7

8

9

10

11

12

1314 15 16

17


OOIP,MMstb


Mstb

Cum. GasProduction

MMscf

ProductionPeriod,

daysDeveloped

1 Field data 2.57 1.54 715 980 -2 Field data 2.32 1.40 1096 653 -3 Field data 6.63 3.98 1786 944 -4 Field data 0.15 3.10 0 2648 -5 Field data 0.71 0.63 232 389 -6 Field data 0.63 0.40 201 108 -7 Field data 1.26 0.76 331 190 -8 Field data 0.02 1.15 0 792 -

TotalDeveloped

14.29 12.96

ProspectsWOC

Initialized9 WOC 0.78 0.47 154 252 851

11 WOC 4.24 2.55 1352 1984 280312 WOC 1.52 0.91 443 705 94214 WOC 0.48 0.29 138 218 57815 WOC 0.34 0.20 120 163 365


7.36 4.42 2207 3322 -

ProspectsGWC

Initialized9 GWC 0 1.17 0 866 273

11 GWC 0 6.39 0 5667 82012 GWC 0 2.29 0 1996 395


0 9.85 0 8529 -


ByReference

13 Region 6 0.63 0.38 173 295 42613 Region 4 0.06 0.44 0 389 91

11.5 BCF , 2.2 MMBO reserves

in 8 compartments




1

2

3

4

5

6

7

8

9

1011 12

13 14 15

16

17



Sand 4 Sand ModelResults of modeling

1

2

3

4

5

6

7

8 9

10 11 12

13 1415

1617


OOIP,MMstb


Mstb

Cum. GasProduction

MMscf

ProductionPeriod,

daysDeveloped

1 Field data 0.80 1.04 295 562 -2 Field data 2.20 1.98 353 304 -3 Field data 0.09 0.12 10 23 -4 Field data 0.99 1.50 371 857 -5 Field data 2.15 1.94 772 545 -

TotalDeveloped

6.23 6.58

ProspectsWOC

Initialized6 WOC 0.43 0.39 243 345 14297 WOC 0.48 0.43 127 323 6698 WOC 0.27 0.25 98 212 578

10 WOC 0.08 0.07 21 56 12216 WOC 0.07 1.01 0 903 213


1.33 2.15 489 1839 -

ProspectsGWC

Initialized6 GWC 0 0.76 0 860 2737 GWC 0 0.84 0 817 2438 GWC 0 0.48 0 430 91


0 2.08 0 2107 -


ByReference

9 Region 2 0.01 0.01 - - -11 Region 10 0.23 0.21 60 169 33413 Region 16 0.01 0.46 0 414 12214 Region 16 0.01 0.52 0 453 12215 Region 16 0.02 0.64 0 559 122

TotalInitialized

ByReference

0.28 1.84 60 1595 -

3.8 BCF , 1.33 MMBO reserves

in 5 compartments

Summary of resultsRegion OOIP,

MMstbOGIP, Bscf Cum. Oil

Production,Mstb

Cum. GasProduction

MMscfProspects

WOCInitialized

PL1-1 0.17 0.07 95 49PL1-5A 1.56 0.93 611 745PL1-5B 7.36 4.42 2207 3322PL1-6A 1.33 2.15 489 1839PL1-6M 0.90 0.90 365 742


11.32 8.47 3766 6697

ProspectsGWC

InitializedPL1-1 0 8.20 0 6430

PL1-5A 0 1.93 0 1716PL1-5B 0 9.85 0 8529PL1-6A 0 2.08 0 2107PL1-6M 0 1.68 0 1503


0 23.74 0 20285


ByReference

PL1-1 0 0 0 0PL1-5A 0.81 0.48 161 296PL1-5B 0.63 0.38 173 295PL1-6A 0.28 1.84 440 2735PL1-6M 0 0 0 0

TotalInitialized

ByReference(*)

1.72 2.70 774 3326

(*) Prospect initialized by reference is counted as the better of the two for the region, if two initializations are in this category for the same region.

27 BCF , 3.8 MMBO new reserves in 5

horizons

Conclusions:

1. Integration of quick simulation and geoscience interpretations allowed significant new reserves to be identified in a mature asset approaching the economic limit

• Neither discipline could have identified all of these reserves

• 64 fault compartments

* history matched multiple times only in weeks

• Maps generated quickly

* days to weeks – not months to years

Documents

Workflow for Finding Bypassed Reserves in Mature Assets Real Time Integration of Simulation, Seismic Interpretation, and Geophysics Best Answers Possible