应用生烃动力学法研究川东上二叠统烃源岩生烃史  

Study on Hydrocarbon-Generating History of Hydrocarbon Source Rock in Upper Permain E. Sichuan Basin with Hydrocarbon-Generating Kinetics

作　　者：徐立恒[1] 陈践发[1] 卢双舫[2] 马广宇[1] 李吉君[2] 

机构地区：[1]中国石油大学资源信息学院,北京102249 [2]大庆石油学院地球科学学院,黑龙江大庆163318

出　　处：《吉林大学学报（地球科学版）》2008年第4期594-599,共6页Journal of Jilin University：Earth Science Edition

基　　金：中石化资助项目(G0800-06-ZS-138)

摘　　要：现今川东上二叠统烃源岩生烃史研究具有局限性。首先,没有对上二叠统Ⅰ-Ⅱ1型灰岩生油、Ⅲ型泥岩的生气史分开评价;其次,海相镜质组反射率通过拟合公式换算成镜质体反射率评价烃源岩成熟度具有局限性。针对上述不足,笔者通过热模拟实验,利用化学动力学方法,标定出两类源岩生油、生气的动力学参数,并结合川东地区的埋藏史及热史,模拟出源岩有机质的成烃转化率曲线。研究表明:上二叠统灰岩、泥岩有机质在距今200 Ma和190 Ma分别进入了生油、生气门限,而在距今170 Ma和140 Ma生烃结束。In the Eastern Sichuan Basin the study of hydrocarbon-generating history of the Upper Permian source rocks has not well done up to now. Firstly, the hydrocarbon-generating history are not separately evaluated for Ⅰ -Ⅱ 1 limestone and Ⅲ mudstone. Secondly, there are limitations in the evaluation of source rock maturity when conversing vitrinite group reflectance of marine facies to vitrinite reflectance by fitting formula. Trying to solve the problems above, we demarcated two kinds of dynamic parameters for oil-generating and gas-generating of source rocks by thermal modeling and chemical dynamic methods. Combined with thermal history and burial history of the Eastern Sichuan Basin, we fitted out a transformation ratio curve of oil-generation. The study shows that organic material from limestone and mudstone of the Upper Permian reached oil and gas threshold in 200 Ma and 109 Ma, and stopped oil-generaing in 170 Ma and 140 Ma.

关 键 词：川东 烃源岩 生烃史 镜质体 生烃动力学 

分 类 号：P618.13[天文地球—矿床学]