Tabular disclosure of the aggregate change in the standardized measure of discounted future net cash flows relating to proved oil and gas reserves and oil and gas subject to purchases under long-term agreements in which the enterprise participates in the operation of the properties on which oil and gas is located or otherwise serves as the producer.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Form 20-F
-Number Part II
-Section Item 18
-Subparagraph (Instruction 2)
-Publisher SEC

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 932
-SubTopic 235
-Name Accounting Standards Codification
-Section 55
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477916/932-235-55-7

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 932
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 34
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477215/932-235-50-34

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 932
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 35A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477215/932-235-50-35A

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 932
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 35
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477215/932-235-50-35

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 34
-SubTopic 235
-Topic 932
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477215/932-235-50-34

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