New opportunities identification in mature field

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TABLE OF CONTENTS

INDEX OF TABLES.......................................................................................................................iv

INDEX OF FIGURES.......................................................................................................................v

SYMBOLS ANDABBREVIATIONS............................................................................................vii

ACKNOWLEGMENT......................................................................................................................ix

EXECUTIVE SUMMARY..………………………………………………………………………..x

1. GENERALITY…………………………………………………….………………………….….1

1.1 Field Location……………………………………………………………………………….…..1

1.2 Geological Information………………….………………….…………………………………...2

1.3Reservoir Data…………………………………………………………………………………...2

2. FIELD HISTORY OVERVIEW………..….……………………………………………………..3

2.1 Current Well Status….…………….……..……………………………………………………….3

2.2 Field Production History……...……………..…………………………..………….………….....4

3. WELL REVIEW AND ANALYSIS .........................................…….…………….……………..5

3.1 Current Well Performance..............................................................................................................5

3.2 Threat/Opportunity Summary…………………………………………….………………………29

3.3 Selected Candidates for Intervention and Initial Oil Rate.................................................…..….30

4. RESERVES CALCULATIONS…………….…….…………………………………………......31

4.1 Volumetric Calculation Method.…………...…………………………………………………....31

4.2 MaterialBalance Method .............................................................................................................31

4.3 Reservoir Simulation Method………………………………………………..…………………..31

4.4 Decline Curve Analysis Method..……………………………......……………………………....32

5. DECLINE CURVE ANALYSIS .......................................…………………………………......33

5.1 Low Case....................................................................................................................................33

5.2 Mid Case…………………………………………………………………………………….....34

5.3 High Case…………………………………………………………………………………...….36

5.4 Field Recovery Factor ................................................................................................................37

5.5 Field ProductionForecast.............................................................................................………..38

6. CONCLUSIONS ...................................................………………………………………….….39

7. RECOMMENDATIONS .............................................................................................................39

8. BIBLIOGRAPHY……………………………………………………………………….……....40

index of tablesTABLE 1. Reservoir Data…………………………………………………………………....2

Table 2. Producer wells………………………………………….………………………..3

TABLE 3. WELL CANDIDATE SELECTION........ ..…..………………..…………..……….….29

Table 4. SELECTED CANDIDATES FOR INTERVENTION..…..……………….…………..30

Table 5. LOW CASE PRODUCTION FORECAST.......…………....……………………..…...34

Table 6. MID CASE PRODUCTION FORECAST.……………………..……………………..35

Table 7. HIGHCASE PRODUCTION FORECAST...………………..………….……………..37

table 8. FIELD RECOVERY FACTOR............………………………………………………..37

index of figures

fig.1 iMBONDEIRO field Geographic Location …….…...……….……………….….1

fig.2. field production history ………….……...…..…….…………………………….4

fig.3 IMB-1 Performance.………….………..……………...……………………………….5

fig.4 lOG OF IMB-1…..………………. …………………..……………………………………..6

Fig.5WELLBORE DIAGRAM OF IMB -1..….……………….…………………………..…….7

fig.6 IMB -3 Performance…………….…….……………………………..……………...…8

fig.7 LOG OF IMB -3…………………………….…………………..………….……..……….…9

fig.8 WELLBORE DIAGRAM OF IMB -3 ……….………..……………….……….…..……....10

fig.9 IMB -4 Performance……………………………………………..…………………....11

fig.10 COWC LOG ON IMB -4………..……….………………………...……………..……….12

fig.11. WELLBORE DIAGRAM OF IMB...
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