不同烃源岩实验评价方法的对比

COMPARISONS OF GEOCHEMICAL METHODS FOR ASSESSMENT OF HYDROCARBON-GENERATING POTENTIAL

刘全有 刘文汇 王晓锋 王万春

Liu Quanyou Liu Wenhui Wang Xiaofeng Wang Wanchun

中国石油天然气股份有限公司 勘探开发研究院, 北京 100083 2. 中国石油化工股份有限公司 石油勘探开发研究院, 北京 100083 3. 中国科学院 兰州油气研究中心, 兰州 730000

Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China 2. Exploration & Production Research Institute, SINOPEC, Beijing 100083, China 3. Key Laboratory of Gas Geochemistry, Chinese Academy of Sciences, Lanzhou, Gans

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。

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.

https://doi.org/10.11781/sysydz200701088