摘要
本文在辽河盆地地质、地球化学资料综合分析的基础上,根据Magara的思想,提出了一种用面积法估算排烃效率的新方法。该方法是建立在对化学动力学定律及充分的排烃依据的认识之上的。文中阐述了有机质丰度、干酪根类型、地温及流体压力等项参数的变化特征并将其作为判定排烃的依据;初步找出了影响排烃效率的几个重要因素。此法在辽河盆地的应用效果表明:它是一种能够综合反映地层多种影响因素的、切实可行的评价初次运移效率的方法。
Based on the geolgoical and geochemical data of the west Liaohe depressionDamintun depression and the east Liaohe depression in Liaohe bagin.a new method
has been presented,which calculates expulsion efficiency with AD-the area difference between normal hydrocarbon ratio trend and surplus hydrocarbon ratio curve. The method is estabished upon dynamochemical laws and sufficient bases of expelled hydrocarbon that include characteristics of the changes in such parameters as the content of organic carbon, the type of kerogen, the geotherm and the fluid pressures. And several important factors affecting the expulsion efficiency have been discussed in this paper.
Liaohe basin is used as example. There are three conclusions as follows: 1. The two types of normal hydrocarbon ratio: index-parabola and index; 2.The two types of expulsion zones: single expulsion zone, two or three expulsion zones; 3. The expulsion efficiency of Liaohe basin. 20%<φ<30%.
出处
《地球科学(中国地质大学学报)》
EI
CAS
CSCD
北大核心
1989年第3期259-269,共11页
Earth Science-Journal of China University of Geosciences
关键词
排烃效率
初次运移
生油岩
expulsion efficiency, reverse zone of hydrocarbon ratio, normal hydrocarbon ratio trend, surplus hydrocarbon ratio curve, Liaohe basin