论文部分内容阅读
依据天然气组分特征可以判别煤型气和油型气这两种极端类型天然气的母质转化程度 ,但对于既有煤型气又有油型气或介于煤型气和油型气之间的天然气则不适用。在前人判别煤型气和油型气母质类型和转化程度公式的基础上 ,建立了既适用于煤型气又适用于油型气母质来源的统一的判别公式。用这一公式判别出柴达木盆地北部断块第三系天然气来源于侏罗系煤系地层 ,西部坳陷天然气来源于第三系 A- 类母质烃源岩。
Based on the characteristics of natural gas components, the conversion degree of parent material of two extreme types of natural gas such as coal-type gas and oil-type gas can be distinguished, but for both coal-type gas and oil-type gas or between coal-type gas and oil-type gas Natural gas does not apply. On the basis of the predecessors’determination of the type and conversion degree of coal gas and oil gas, a unified discriminant formula is established for both the coal gas and the gas source. Using this formula, we can conclude that the Tertiary natural gas in the northern Qaidam basin is derived from the Jurassic coal system strata. The natural gas in the western depression is derived from the Tertiary A-type parent source rock.