酒泉盆地酒西坳陷原油油源  

The origin and source of crude oils in the Jiuxi depression,Jiuquan Basin

作　　者：陈建平[1,2,3] 陈建军 倪云燕[1,2,3] 范铭涛 廖凤蓉 魏军 韩永科[1] Chen Jianping;Chen Jianjun;Ni Yunyan;Fan Mingtao;Liao Fengrong;Wei Jun;Han Yongke(PetroChina Research Institute of Petroleum Exploration & Development,Beijing 100083,China;State Key Laboratory of Enhanced Oil Recovery,Beijing 100083,China;CNPC Key Laboratory of Petroleum Geochemistry,Beijing 100083,China;PetroChina Yumen Oilfield Company,Ganshu Jiuquan 735000,China)

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]提高石油采收率国家重点实验室,北京100083 [3]中国石油天然气集团公司油气地球化学重点实验室,北京100083 [4]中国石油玉门油田公司,甘肃酒泉735000

出　　处：《石油学报》2019年第7期761-776,共16页Acta Petrolei Sinica

基　　金：中国石油天然气股份有限公司科技重大专项课题(2013E-3301)资助

摘　　要：酒泉盆地酒西坳陷目前已发现的原油主要分布在青西凹陷和南部凸起,可分为3种不同类型,油源分别为青西凹陷青南次凹下白垩统不同层段的烃源岩。第1类原油为低成熟原油,油源主要为低成熟的下白垩统下沟组上段烃源岩,下沟组中段上部烃源岩可能也有一定的贡献;第2类原油为中等成熟原油,油源主要为下沟组中段烃源岩,下沟组下段上部烃源岩可能也有部分贡献;第3类原油为高成熟原油,油源为下沟组下段和赤金堡组烃源岩。青南次凹中部柳沟庄油田中-浅层的原油主要为第2类原油,少量为第1类原油,油源分别为青南次凹中部下沟组中段和下沟组上段烃源岩;青南次凹中部深层的原油为第3类原油,油源为青南次凹中部深层的下沟组下段和赤金堡组烃源岩。青南次凹南部的窟窿山构造带和北部的柳北构造带的原油属于第3类原油,油源分别为青南次凹南部和北部下沟组下段与赤金堡组烃源岩。南部凸起的鸭儿峡-老君庙-石油沟构造带的原油属于第2类原油,油源为青南次凹中部下沟组中段烃源岩。青南次凹的下沟组中段、下沟组下段和赤金堡组是酒西坳陷的主力烃源层。The crude oil that has been discovered in the Jiuxi depression,Jiuquan Basin is mainly distributed in the Qingxi sag and the southern uplift.There are three types of crude oils with different maturities in the Jiuxi depression;they are originated from the source rocks of different layers of the Lower Cretaceous in Qingnan subsag of the Qingxi sag.The first type is the low-maturity crude oil.It is mainly from the low-maturity source rocks of the Upper Member of Lower Cretaceous Xiagou Formation,and the upper source rocks of the Middle Member of Xiagou Formation also have a certain contribution to it.The second type is the medium-maturity crude oil,mainly from the source rocks of the Middle Member of Xiagou Formation,partially contributed by the upper source rocks of the Lower Member of Xiagou Formation.The third type is the high-maturity crude oil,originated from the source rocks of the Lower Member of Xiagou Formation and the Chijinpu Formation.The medium-shallow reservoir of the Liugouzhuang oilfield in the central part of Qingnan subsag is dominated by the second type of crude oil,accompanied with a small amount of the first type,which are derived from the source rocks of the Middle Member and Upper Member of Xiagou Formation in the central part of Qingnan subsag.The deep reservoir in the central part of Qingnan subsag is dominated by the third type of crude oil,derived from the source rocks of the Lower Member of Xiagou Formation and the Chijinpu Formation in the deep layer of the central part of Qingnan subsag.The Kulongshan tectonic belt in the south and the Liubei tectonic belt in the north are dominated by the third type crude oil,derived from the source rocks of the Lower Member of Xiagou Formation and the Chijinpu Formation in the southern and northern part of Qingnan subsag,respectively.The Yaerxia-Laojunmiao-Shiyougou tectonic belt is dominated by the second type of crude oil,derived from the source rocks of the Middle Member of Xiagou Formation in the central part of Qingnan subsag.The Middle Member a

关 键 词：酒泉盆地 酒西坳陷 原油 生物标志物 油源对比 

分 类 号：TE122.1[石油与天然气工程—油气勘探]