摘要
众所周知,对于油气资源的预测工作来说,探讨有机质的演化史具有极其重要的意义。近几年来,关于这一问题的定量研究方法在国内外均有所报道。其中较有影响的方法之一是由(1969,1971)提出并经 Waples(1980)充实的时间-温度指数(TTI)法。
Abstract
The mature process of organic matters in the middle part of the 3rd mem-ber of Shahejie Formation (Es),the major source rock in Dongying depres-sion,is described in terms of residual carbon.The threshold of maturity(ca.2,400m in depth and 100℃),climax of oil generation(ca.3,100m in depth and 124℃)and the limits of major oil generation zone(the depth for the upper limit is equal to the threshold of maturity,the lower limit being about 3,700m,with temperature 147℃)are confirmed by calculation at the centre of Lijin seg in Dongying depression.At present,this centric part has entered into the end stage of oil generation,and it seems there is no more potential for petroleum generation.The result of calculation fits well with geochemical study,and the enrich.ment and properties of oil and gas,thus proved that this method works effec-tively in the area studied,and that it could be another manner in quantita-tire assessment of oil and gas resources.
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