东海盆地西湖凹陷烃源岩成熟度厘定——FAMM分析的证据

发布时间：2018-04-15 22:21

本文选题：镜质体反射率 + 多组分荧光变化技术　；参考：《石油实验地质》2017年03期

【摘要】：镜质体反射率是评价烃源岩有机质成熟度的主要指标之一,已有研究表明,镜质体反射率(Ro)除受控于有机质热演化程度外,还受烃源岩有机质类型等因素的影响,镜质体富氢程度制约镜质体反射率的抑制程度,影响了Ro测值的准确性。多组分荧光变化(FAMM)技术可有效解决镜质体反射率的抑制问题。利用FAMM技术和镜质体反射率分析方法,对取自东海盆地西湖凹陷9口钻井的10件平湖组烃源岩样品进行了成熟度分析,结果显示样品的镜质体反射率存在不同程度的抑制,抑制校正值介于0.01%~0.25%,个别样品稍有增强现象。根据FAMM分析结果,以TWT1井为例,厘定了该井区平湖组烃源岩的成熟度,认为TWT1井区平湖组烃源岩的现今成熟度应处于0.90%~1.41%,而不是实测镜质体反射率分析结果显示的0.77%~1.21%。研究结果有助于合理评价平湖组烃源岩生烃潜力及油气资源潜力。
[Abstract]:Vitrinite reflectance is one of the main indexes to evaluate the maturity of organic matter in source rocks. It has been shown that vitrinite reflectance (RoA) is affected not only by the thermal evolution of organic matter, but also by the types of organic matter in source rocks.The degree of hydrogen enrichment in vitrinite restricts the inhibition of vitrinite reflectance and affects the accuracy of Ro measurement.Multicomponent fluorescence change (FAMMM) technique can effectively solve the problem of vitrinite reflectance suppression.Using FAMM technique and vitrinite reflectance analysis method, 10 samples of Pinghu formation source rock from 9 wells in Xihu sag in the East China Sea basin were analyzed for maturity. The results showed that the vitrinite reflectance of the samples was inhibited to some extent.The inhibition correction value was between 0.01 and 0.25, with a slight enhancement in individual samples.Based on the results of FAMM analysis and taking well TWT1 as an example, the maturity of the source rocks of Pinghu formation in this well area is determined. It is considered that the present maturity of the source rocks of Pinghu formation in TWT1 well area should be 0.901.41, rather than 0.77g / 1.21, as shown by the results of vitrinite reflectance analysis.The results are helpful to evaluate the hydrocarbon generation potential and hydrocarbon resource potential of source rocks in Pinghu formation.
【作者单位】：中国石化石油勘探开发研究院无锡石油地质研究所;
【基金】：中国石化科技部项目“西湖凹陷平湖组油气资源评价与区带优选”(G5800-13-ZS-KJB028)资助
【分类号】：P618.13

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