摘要
准噶尔盆地东部三台、北三台原油普遍遭受了生物降解作用。通过对原油中生物标记化合物的研究,发现北10井原油具有随埋深增加生物降解程度逐渐加强的特征;台35井原油(J_2t)具有两期原油相互混染现象。综合研究认为,这些生物降解原油均为地质历史时期的产物。结合该区地质发展及凹陷中生油层的热演化情况,推测该区至少经历过两次以上的油气聚集过程。
Grude oil from Santai,north Santai,east Junggar basin,had subjected to biodegradation in general.By a study of bio-markers in the crude oil,it is found that crude oil from well Bei-10 has a chalacteristics of increased degree of biogradation with the depth of burial,While oil fromwell Tai-35 has a feature of mixing of crude oil generated in two different geological sta- ges.It is believed by a comprehensive study that these biogradated oil are the products developed in the geological history.A combination of these with the geological history and the thermal evolution of the source forma- tions in this depression,gives a prediction that at least two stage of accumu- lation of oil and gas had been occured in this region.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
1991年第5期31-37,83,共8页
Petroleum Exploration and Development
