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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Asset Retirement Obligations

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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Proved Oil and Gas Property

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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Unproved Oil and Gas Property

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Lease area in which a working interest is owned.

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Fractional interest owned based on working interests or other economic arrangements of lease area.

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Number of divestitures

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Number Of Planned Divestitures

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations.

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