摘要
塔里木盆地英吉苏凹陷目前所揭示原油分子碳同位素分布呈现明显二阶段模式,显示该地区具两期成藏特征:一期为以龙口1井为代表的正常原油成藏,油源主要与下奥陶统沉积有关(以英东2井4171-4175m地层为对比源岩);另一期为以英南2井为代表的高演化凝析油气成藏,其轻烃组成可能属于干酪根高演化阶段产物,而非原油裂解成因。
A two-stage mode of stable carbon isotopic profile of n-alkanes from crude oil in the Yingjisu sag of Tarim basin has been revealed, featuring a two-phase hydrocarbon accumulation process to date in this region. The first phase is related to the peak oil generation and accumulation of Lower Ordovician source rocks and exemplified by Well Longkou-1. The second phase is characterized by the highly matured condensate reservoirs exemplified by Well Yingnan-2. The distribution of light hydrocarbons in condensates shows that it is possibly derived from the high evolution stage of kerogen rather than from crude cracking.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2007年第3期324-326,共3页
Xinjiang Petroleum Geology
基金
国家973项目
中国西部典型叠合盆地多重烃源灶形成演化及其有效性(2006CB202303)资助
