摘要
为确定中拐地区二叠系佳木河组油气藏的充注时间和成藏期次,利用LinkamTHMS600型冷热台和LabRam-010型激光拉曼光谱仪,采用流体包裹体和拉曼测试技术,对储层沸石和方解石中流体包裹体样品进行测试分析。拉曼测试结果显示,佳木河组中主要存在盐水包裹体、CO2包裹体、低饱和烃包裹体和富含CH4包裹体4种包裹体类型;均一温度和冰点均具有明显的双峰特点,均一温度第1峰值为60~80℃,第2峰值为110~120℃;公式法计算的包裹体盐度主要分布在0.73%~3.86%和5.76%~9.2%2个区间,说明至少存在2期流体活动。在包裹体测试资料基础上,结合埋藏史、构造演化史和烃源岩演化史最终确定佳木河组主要的成藏期次有2期:三叠纪末早侏罗世(228~206Ma);旱白垩世(145~112Ma)。
For the purpose of ascertaining the time of gas charging and the formation period of gas reservoirs of Permian Jiamuhe Formation in Zhongguai area of Junggar Basin, fluid inclusion samples from this field were tested and analyzed using the more advanced testing apparatus and techniques. The results show that the fluid inclusions of this area mainly include brine inclusion, hydrocarbon-bearing CO2 inclusion, lowly saturated hydrocarbon-rich liquid hydrocarbon inclusion and CH4-rich gaseous hydrocarbon inclusion. The homogenization temperature and salinity of the fluid conclusion both have two special peaks, and the peaks of homogenization temperature are 60 80℃ and 100-120℃. Use formula of calculation method inclusions salinity is mainly distributed in 0.73%- 3.86% and 5.76%-9.2%,which shows at least 2 times of fluid ac- tivities. The main accumulation period of Jiamuhe Formation has 2 periods on the base of inclusion test data and the burial history,tectonic evolution history and thermal evolution of source rocks, from the Late Tri- assic to Early Jurassic (228-206Ma) and Early Cretaceous (145 112Ma).
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2013年第5期931-939,共9页
Natural Gas Geoscience
基金
国家科技重大专项(编号:2009ZX05009-002)资助
关键词
中拐地区
流体包裹体
拉曼测试
均一温度
成藏期次
Zhongguai area
Fluid inclusions
Raman test
Homogenization temperature
Accumulation periods