马东地区地层圈闭成藏条件的再认识  

THE RE-RECOGNITION OF STRATIGRAPHIC TRAP ACCUMULATION IN MADONG AREA

作　　者：尹太举[1] 张昌民[1] 汪立群[2] 陈琰[2] 杨明林[1] 

机构地区：[1]长江大学油气资源与勘探技术教育部重点实验室,湖北荆州434023 [2]青海油田研究院,甘肃敦煌736202

出　　处：《西南石油大学学报（自然科学版）》2008年第3期29-32,共4页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家自然科学基金(40602013,40572078);教育部博士点基金项目(20060489002)

摘　　要：马东1井的钻探使得对柴达木盆地尕丘凹陷周缘的成藏潜力有了新的认识,也为本区进行地层油气藏勘探提供了经验教训。该井由于油源不足、圈闭落实较差而未达到预期的钻探目标。新的研究表明,尕丘凹陷烃源岩不发育、厚度小、分布局限,大大制约了圈闭的有效性。所钻圈闭顶板封堵性较差,有效性较低,且处于由路乐河组中部泥岩为底板的完全由下第三系地层构成的更为可靠的地层圈闭之外缘,因而其圈闭也存在较大的不确定性。该圈闭因油源不足而难于成藏,地层圈闭目标应转向马海西缘和北缘油气运移通道上的有利油气捕获部位。The drilling of Madong well-1 results in new recognition of hydrocarbon accumulation potential around Guqiu sag,Jungger basin and gives lessons and experience to stratigraphic hydrocarbon exploration in the area.The expected drilling mission is not reached duo to inadequate hydrocarbon source and poorly identified traps.Recent research indicates there are only under developed hydrocarbon source rocks thin thickness and localized distribution in the sag,which greatly confines the sufficiency of the traps.The cap rocks of penetrated traps are of poor sealing capacity and sufficiency,there are severe uncertainty of the traps.Formation of the reservoirs for the traps will be hard due to inadequate hydrocarbon source,explorative targets for stratigraphic traps should turn to the favorable hydrocarbon capturing areas in migrating channels in south and north rims of Mahai.

关 键 词：地层圈闭 井位部署 成藏评价 勘探前景 尕丘凹陷 柴达木盆地 

分 类 号：TE122.3[石油与天然气工程—油气勘探]