摘要
除页岩气之外,桑植石门复向斜常规天然气也应值得关注,通过野外观察及实验分析,对桑植石门复向斜的烃源岩沉积环境、类型及分布、烃源岩的地球化学特征研究后得出:本区烃源岩主要发育于上震旦统-下寒武统中,分布面积广且厚度大,包括碳酸盐岩、泥质岩。上震旦统烃源岩有机质类型为腐泥型,有机碳含量高,有机质演化处于高成熟-过成熟阶段,综合评价中等烃源岩。下寒武统烃源岩有机质类型为腐泥型,演化程度也处于过成熟阶段,综合评价为好的烃源岩,2个层位均处于生气阶段或者生气阶段的末期。应用有机碳法得出桑植-石门复向斜区的天然气总资源量为0.457 44~0.479 81×10^(12) m^3,中间值为0.468 625×10^(12) m^3,应用地质类比法得出本区常规天然气的资源量为0.457 5~0.501 8×10^(12) m^3,中间值为0.479 6×10^(12) m^3。
Apart from shale gas, natural gas should be worthy of attention in Sangzhi-Shimen synclinorium.Through fields observation and analysis of the experiment, sedimentary environment, source rock types and distribution of the geochemical characteristics of source rocks research concluded that the source rocks of Neo-proterozoic to Early Paleozoic Era in Sangzhi-Shimen synclinorium were mainly developed in upper Sinian to lower Cambrian.The source rocks include carbonate rock, shale, and in a large thickness with wide area of distribution.The type of organic matter of the source rocks in upper Sinian are sapropelic and transitional type, the organic carbon content is high and organic matter evolution remains at high maturity to overmature stage, so the comprehensive evaluation are moderate source rocks.The source rocks in lower Cambrian is sapropelic.The organic matter evolution remains at mature stage, the comprehensive evaluation of the source rocks is good.Comprehensive analysis of this two horizon is that they are all in gas generation or the terminal stage of gas generation.Preliminary analysis is that the most favorable area for source rock development in Zhangjiajie-Sangzhi-West of Cili in the Sangzhi-Shimen synclinorium.
作者
杨幸起
张琳婷
刘春红
张洁
张立明
YANG Xing-qin ZHANG Lin-ting LIU Chun-hong ZHANG Jie ZHANG Li-ming(College of Mining Engineering, North China University of Science and Technology, Tangshan Hebei 063210, China Residual Oil-Enhanced Oil Recovery Laboratory, Tangshan Hebei 063210, China)
出处
《华北理工大学学报（自然科学版）》
CAS
2017年第2期10-15,共6页
Journal of North China University of Science and Technology：Natural Science Edition
基金
湖南省国土资源厅软科计划资助项目(2010-12)
关键词
地质学
桑植-石门复向斜
新元古-早古生代
烃源岩特征
geology
Sangzhi-Shimen synclinorium
neoproterozoic to early paleozoic era
source rock characteristics
