汤原断陷天然气特征  

CHARACTERISTICS OF THE NATURAL GAS IN TANGYUAN FAULT DEPRESSION

作　　者：任军虎[1] 王世辉[1] 陈春瑞[1] 金玮[1] 

机构地区：[1]大庆油田有限责任公司勘探开发研究院

出　　处：《大庆石油地质与开发》2014年第3期14-19,共6页Petroleum Geology & Oilfield Development in Daqing

基　　金：中国石油天然气股份有限公司重大专项“大庆油田原油4000×10~4t持续稳产关键技术研究”(2011E-1204)

摘　　要：从天然气组分、同位素分布、储层流体包裹体及自生伊利石定年等方面分析了汤原断陷的天然气特征.研究认为：断陷西部、中部以生物气和生物热催化过渡带气为主,断陷东部以油型气为主,同时存在非烃气,断陷中部存在少量非烃气混入气、油型气,且有2口井发现了生物乙烷气;含烃包裹体丰度较高,且西部高于中部及东部;储集层流体包裹体盐水均一化温度分布呈双峰态,断陷可能经历了2期油气充注,均一化温度值东部高于中部及西部;储层自生伊利石K-Ar同位素年龄为14.6～10.5 Ma,成藏时间为富锦组沉积时期.From the viewpoints of the compositions, isotope distribution, reservoir fluid inclusions, K-Ar dating of the authigenic illite and so on, the characteristics of the natural gas in Tangyuan Fault Depression are analyzed. The study results show that the biogas and bio-thermal catalytic transitional belt gas have absolutely predominance in the west and middle of the depression, so does the oil type gas in the east, at the same time, non-hydrocarbon gas also exists in the east. There are the mixed gas with a small amount of non-hydrocarbon gas and oil type in the middle, and moreover the biogenic ethane is found in two wells; the abundance of the hydrocarbon inclusion is greatly high, and furthermore more higher in the west than that in the middle and east ; the distribution of the fluid inclusion homogenization temperature shows bimodal state, this means that there are two phases of the oil and gas filling for the depression, and the eastern uniform temperature is higher than that in the center and west; K-Ar iso- tope age of reservoir authigenic illite is 14. 6-10. 5 Ma, this means that the time of the hydrocarbon accumulation belongs to the sedimentary period of Fujin Formation.

关 键 词：汤原断陷 天然气特征 碳同位素 生物乙烷 流体包裹体 

分 类 号：TE353[石油与天然气工程—油气田开发工程]