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Last Update:
March 1, 2012
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Oil and gas reserves

Proven oil and gas reserves are the estimated volumes of crude oil, natural gas and natural gas liquids that are shown by geological and engineering data with reasonable certainty to be recoverable in future years from known reserves under existing economic and operating conditions. Accordingly, reserve estimates could be materially different from the quantities of oil and natural gas that are ultimately recovered. To reduce uncertainties, Wintershall uses independent, internationally recognized reserve auditors to perform recurring reserves audits of its major oil and gas fields.

The tables below show the estimated net quantities as of December 31, 2010 and 2011, of the company’s proven oil and gas reserves and proven developed oil and gas reserves as well as changes in estimated proven reserves as a result of production and other factors.

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Oil 2011

 

 

 

 

 

 

Germany

Rest of Europe

Russia, Caspian Sea region

North Africa, Middle East

South America

Total

Proven developed and undeveloped oil reserves as of January 1, millions of barrels (MMbbl)

54

4

9

268

27

362

Revisions and other changes

14

3

17

Extensions and discoveries

5

5

Purchase/sale of reserves

32

32

Production

7

2

1

10

3

23

Proven reserves as of December 31

61

10

40

258

24

393

Minority interests

118

118

Proven reserves after minority interests

61

10

40

140

24

275

Thereof at-equity companies

8

8

Proven reserves after minority interests and at-equity companies

61

10

32

140

24

267

Minority interests in production

5

5

Proven developed reserves as of December 31

43

3

21

237

19

323

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Gas 2011

 

 

 

 

 

1

The natural gas volumes can be converted with the factor 6 BSCF per MMBOE (Million Barrel Oil Equivalent).

 

Germany

Rest of Europe

Russia, Caspian Sea region

North Africa, Middle East

South America

Total

Proven developed and undeveloped gas reserves as of January 1, Billion Standard Cubic Feet (BSCF)1

249

101

3,645

195

1,210

5,400

Revisions and other changes

7

26

2

30

65

Extensions and discoveries

20

20

Purchase/sale of reserves

428

428

Production

31

37

314

5

143

530

Proven reserves as of December 31

225

110

3,761

190

1,097

5,383

Minority interests

93

93

Proven reserves after minority interests

225

110

3,761

97

1,097

5,290

Thereof at-equity companies

3,335

3,335

Proven reserves after minority interests and at-equity companies

225

110

426

97

1,097

1,955

Minority interests in production

3

3

Proven developed reserves as of December 31

199

100

3,501

153

895

4,848

  Download (Download XLS xls, 19 kB)

Oil 2010

 

 

 

 

 

 

Germany

Rest of Europe

Russia, Caspian Sea region

North Africa, Middle East

South America

Total

Proven developed and undeveloped oil reserves as of January 1, millions of barrels (MMbbl)

54

3

11

274

30

372

Revisions and other changes

6

3

 

23

1

33

Extensions and discoveries

Purchase/sale of reserves

Production

6

2

2

29

4

43

Proven reserves as of December 31

54

4

9

268

27

362

Minority interests

123

123

Proven reserves after minority interests

54

4

9

145

27

239

Thereof at-equity companies

9

9

Proven reserves after minority interests and at-equity companies

54

4

145

27

230

Minority interests in production

14

14

Proven developed reserves as of December 31

42

3

9

246

22

322

  Download (Download XLS xls, 20 kB)

Gas 2010

 

 

 

 

 

 

Germany

Rest of Europe

Russia, Caspian Sea region

North Africa, Middle East

South America

Total

1

The natural gas volumes can be converted with the factor 6 BSCF per MMBOE (Million Barrel Oil Equivalent).

Proven developed and undeveloped gas reserves as of January 1, Billion Standard Cubic Feet (BSCF)1

278

101

3,562

202

1,317

5,460

Revisions and other changes

5

38

391

13

29

476

Extensions and discoveries

5

5

Purchase/sale of reserves

Production

34

43

308

20

136

541

Proven reserves as of December 31

249

101

3,645

195

1,210

5,400

Minority interests

96

96

Proven reserves after minority interests

249

101

3,645

99

1,210

5,304

Thereof at-equity companies

3,645

3,645

Proven reserves after minority interests and at-equity companies

249

101

99

1,210

1,659

Minority interests in production

9

9

Proven developed reserves as of December 31

223

80

3,517

158

1,007

4,985

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