COMPARISONS OF GEOCHEMICAL METHODS FOR ASSESSMENT OF HYDROCARBON-GENERATING POTENTIAL
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摘要: 在Rock-Eval热解法、H/C比及加水热模拟实验3种烃源岩生烃潜力评价方法对比的基础上,对塔里木盆地满加尔坳陷低成熟侏罗系煤岩进行了生烃评价。对比结果表明,H/C比值与加水热解实验法评价结果较接近,生烃量分别为9.62和9.72 mg/g,而Rock-Eval热解法得到的生烃潜力为32.75 mg/g,远高于其他两种评价结果。Rock-Eval热解法得到的是烃源岩的最大排烃量,而H/C比与加水热模拟实验法获得的是烃源岩的有效排烃量。因此,在对烃源岩的生烃评价中要根据实际需求选择不同的评价方法。
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关键词:
- Rock-Eval热解法 /
- H/C比值 /
- 加水热模拟实验 /
- 生烃评价 /
- 塔里木盆地
Abstract: In this context,on the basis of comparison of three geochemical methods for assessment of source rocks,Rock-Eval pyrolysis,H/C ratio and hydrous pyrolysis,the hydrocarbon-generating potential of the low-mature coal in the Manjiaer sag,Tarim Basin,was determined.The compared results show that the potential of hydrocarbon-generating obtained by H/C ratio is similar with that by hydrous pyrolysis.The yields of hydrocarbon-generation based on the methods of H/C ratio and hydrous pyrolysis are 9.62 and 9.72 mg/g,respectively.In contrast,the yield of hydrocarbon formation is 32.75 mg/g by using method of Rock-Eval pyrolysis,higher than those obtained by the other two methods.It is provided the maximum yield of hydrocarbon generation for Rock-Eval pyrolysis,whereas the effective expelling of hydrocarbons will be obtained by H/C ratios and hydrous pyrolysis.Therefore,it would be necessary for hydrocarbon source assessment to use the geochemical method based on the special regions and aims.-
Key words:
- Rock-Eval pyrolysis /
- H/C ratio /
- hydrous pyrolysis /
- hydrocarbon-generating assessment /
- Tarim Basin
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