摘要
本文利用流体包裹体分析技术,详细剖析了盐城凹陷油气储层中烃类包裹体的地球化学特征,结果表明盐城油气原始母源输入兼有水生藻类和高等植物,沉积环境以还原性占优势,水体有较高盐度,而且油气进入储层前业已成熟。油气注入史研究表明盐城油气注入至少有两期,注入时间分别约为32～34 Ma、5.5～12 Ma,且以第二期注入为主。盐城凹陷油气主要来源于古生界海相腐泥型源岩,并有少许上白垩统泰州组或浦口组的贡献。以张性为主的大断层,是油气向上注入的有效通道,属典型的下生上储成藏模式。
In this paper an advanced fluid inclusion analysis technique was used to study the geochemical characteris-tics of hydrocarbon inclusions in the Yancheng depression. The results indicate that the source inputs come from lower aquatic algae and higher plants. The sedimentary environment was reducing and the salinity of the water medium was high. The hydrocarbons had been mature before they entered into the reservoirs. The petroleum filling history shows that at least two filling processes have occurred and the latter one was most significant. The filling periods were 55-12 Ma and 32-34 Ma, respectively. The hydrocarbons of the Yancheng depres-sion mainly came from Palaeozoic marine sapropelic materials, partly from the Taizhou or Pukou formation. Ex-tensional faults are the effective migration paths.
出处
《地质学报》
EI
CAS
CSCD
北大核心
2002年第2期254-260,共7页
Acta Geologica Sinica
基金
国家攀登计划地质流体项目(编号95-预-39-3)
关键词
盐城凹陷
油气包裹体
均一温度
生物标志物
流体历史分析
江苏
Yancheng depression
hydrocarbon inclusion
homogenization temperature
biomarker
fluid history analysis
