急求石油论文摘要翻译，十分感谢 保证加分

Based on the investigation and study of natural gas at home and abroad on the basis of type, first proposed and possession of the abandoned gas conditions: waste production and pressure from the determination. Research at home and abroad in the calculation method used natural gas reserves on the basis of combined revenue of China's accounting system, comparative analysis of various common economic recoverable reserves calculation. And in accordance with actual production data, the use of the method, which opted for cash flow method based on economic recoverable reserves example, the final consideration in natural gas prices and other risk factors, based on comparative analysis of its natural gas reserves of the impact.
Key words: waste production, exhaust pressure gas reservoir types, economic recoverable reserves