摘要
盆地性超高压油藏的形成,必须受控于盆地特殊的地质背景。阿塞拜疆境内的Kura盆地,位于里海西缘,是夹持于大、小高加索山脉之间的山间裂谷盆地。在古特提斯海的封闭过程中,土耳其板块俯冲至西徐亚板块之下,在地表形成拉张裂陷的地质背景。盆地发育中表现出大套的第四系泥岩沉积,虽然区域储层顶部出现过两次沉积间断,但间断时间均较短,未造成油藏泄压,加之再次下沉的深度未超过储层的原沉积深度,最终形成盆地性的超高压油藏。
The formation of overpressured reservoir as a whole basin must depend on the special geology background of basin.The Kura basin which is located in Azerbaijan of west Caspian is clamped between the big Caucasia and small Caucasia.After Turkey plate subducted below Xixueya plate in the process of Tethys closing,the pull-apart geology background had formed.The basin subsided so cosmically that led to deposite the thick mudstone of Quaternary.Ahhough there were two-times hiatuses,the period was short and the reservoir pressure didn＇t escape.Furthermore,the depth subsided again didn＇t excess the original depth,which resuited in the formation of overpressured reservoir.
出处
《中外能源》
CAS
2006年第6期24-27,共4页
Sino-Global Energy
