Revenue Recognition and Natural Gas Imbalances

The Company follows the sales method of accounting for revenue recognition and natural gas imbalances, which recognizes over and under lifts of natural gas when sold, to the extent sufficient natural gas reserves or balancing agreements are in place.Natural gas, natural gas liquids and oil sales volumes are not significantly different from the Company’s share of production.

Financing Costs, net

Net long-term debt financing costs of $5.9 million (net of $4.0 million accumulated amortization) and $4.8 million (net of $1.8million accumulated amortization) were capitalized and included in other assets as of December 31, 2007 and 2006, respectively,and are being amortized using the effective yield method over the term of the loans through July 2010 for the Second Lien CreditFacility and through May 2010 for the Senior Secured Revolving Credit Facility.

Supplemental Cash Flow Information

The Statement of Cash Flows for the year ended December 31, 2007 does not include the adjustment of the investment in Pinnacle of $5.4 million, net of tax. The Statement of Cash Flows for the year ended December 31, 2006 does not include the acquisition of $55,000 of oil and gas properties in exchange for the Company’s common stock and the capitalization of stock-based compensation associated with the adoption of SFAS 123(R) of $1.7 million, net of tax. The Statement of Cash Flows for the year ended December 31, 2005 does not include interest paid-in-kind of $1.3 million, the net exercise of 80,000 warrants forcommon stock and the acquisition of $2.0 million of oil and gas properties in exchange for the Company’s common stock.

Financial Instruments

The Company's financial instruments consist of cash, receivables, payables and long-term debt. The carrying amount of cash, receivables and payables approximates fair value because of the short-term nature of these items. The carrying amounts of long-term debt approximate fair value as these borrowings bear interest at variable interest rates.

Stock-Based Compensation

In June of 1997, the Company established the Incentive Plan of Carrizo Oil & Gas, Inc. (the “Incentive Plan”), which authorizes the granting of stock options and stock awards to directors, employees and independent contractors. The Company recognized the following stock-based compensation expenses for the years ended December 31:

Stock Options Prior to January 1, 2006, the Company accounted for stock-based compensation utilizing the intrinsic value method as permitted under Accounting Principles Board (“APB”) Opinion No. 25, “Accounting for Stock Issued to Employees.” APB Opinion No. 25 recognized compensation expense only when the market price on the grant date exceeded the option exercise price. In February 2000, the Company repriced certain employee and director stock options and accounted for these repriced stock options in accordance with Financial Accounting Standards Board (“FASB”) Interpretation No. 44 “Accounting for Certain Transactions involving Stock-Based Compensation – An Interpretation of APB No. 25,” (“FIN 44”) which prescribes the variable plan accounting treatment for repriced stock options. Under variable plan accounting, compensation expense is adjusted for increases or decreases in the fair market value of the Company’s common stock to the extent that the market value exceeds the exercise price of the option until the options are exercised, forfeited, or expire unexercised. Under these accounting guidelines,the Company recognized $2.1 million of stock-based compensation expense for the year ended December 31, 2005.

Effective January 1, 2006, the Company adopted Statement of Financial Accounting Standards (“SFAS”) No. 123 (revised 2004), “Share-Based Payment” (“SFAS No. 123(R)”), which requires companies to measure all stock-based compensation awards using the fair value method and record such expense in the financial statements over the vesting period of the options, which is generally three years. The Company implemented SFAS No. 123(R) using the modified prospective transition method.

The Company recognizes compensation expense for all unvested options outstanding as of January 1, 2006, options issued after January 1, 2006, and those options that are subsequently modified, repurchased or cancelled. The compensation expense isbased on the grant-date fair value of the options and expensed over the vesting period. The Company did not restate prior periods to reflect the impact of adopting the new standard. As part of the adoption of SFAS No. 123(R), the Company stopped recording stock-based compensation expense associated with the February 2000 repriced options mentioned above and the liability