鄂尔多斯盆地陇东地区长8油层组物源分析  

Provenance analysis of Chang 8 oil-bearing formation in Longdong area,Ordos Basin

作　　者：肖玲 胡榕[3] 周树勋 陈文龙[5,6] 李涛[5,6] XIAO Ling;HU Rong;ZHOU Shuxun;CHEN Wenlong;LI Tao(School of Earth Science and Engineering,Xi'an Shiyou University,Xi'an 710065,China;Shaanxi Provincial Key Laboratory of Oil and Gas Accumulation Geology,Xi'an Shiyou University,Xi'an 710065,China;Shaanxi 139 Coalfield Geology and Hydrogeology Co.,Ltd.,Weinan 714000,China;PetroChina Changqing Oilfield Company,Xi'an 710018,China;Exploration and Development Research Institute,PetroChina Changqing Oilfield Company,Xi'an 710018,China;Oilfield Development Division,PetroChina Changqing Oilfield Company,Xi'an 710018,China)

机构地区：[1]西安石油大学地球科学与工程学院,西安710065 [2]西安石油大学陕西省油气成藏地质学重点实验室,西安710065 [3]陕西省一三九煤田地质水文地质有限公司,陕西渭南714000 [4]中国石油长庆油田分公司,西安710018 [5]中国石油长庆油田分公司勘探开发研究院,西安710018 [6]中国石油长庆油田分公司油田开发事业部,西安710018

出　　处：《桂林理工大学学报》2024年第2期194-203,共10页Journal of Guilin University of Technology

基　　金：国家科技重大专项(2016ZX05056)。

摘　　要：鄂尔多斯盆地陇东地区延长组沉积物来源,尤其是西部物源争议较大。为探究陇东地区延长组中长8油层组的物源,对陇东地区周缘母岩的特征、碎屑岩中轻重矿物和岩屑组合特征,以及古水流和稀土元素对比分析,对研究区长8油层组的物源进行了总结。结果表明:研究区长8油层组轻矿物、岩屑、重矿物物源分区表现出较好的一致性;油层组受多个物源控制,主要为西南和东北物源,次要为西北、西部和南部物源,各个物源在樊家川-华池-安置农场一带汇聚;延长期沉积走廊与鄂尔多斯盆地具有一定的连通性,西部物源供给以河西走廊源区为主,海源古隆起为辅,二者叠加影响。There is a significant controversy over the source of sediments from Yanchang Formation in Longdong area of Ordos Basin,especially in western region.To explore the provenance of Chang 8 oil-bearing formation,comparitive analysis of the characterization of the peripheral native rocks in Longdong area,the distribution characteristics of light minerals,rock debris,heavy mineral,as well as ancient water flow,rare earth elements comparison are studied.The results show that the provenance zoning of light minerals,rock fragment,and heavy minerals in Chang 8 oil-bearing formation in Longdong area shows good consistency.The Chang 8 oil-bearing formation is controlled by multiple provenances,the primary provenances are the southwest and northeast provenances,and the secondary provenance is the northwest,west,and south provenance.Each provenance converges near the area of Fanjiachuan-Huachi-Anzhi farm.The Hexi Corridor area of Yanchang Formation has a certain connectivity with Ordos Basin.The western provenance supply is dominated by the source area of Hexi Corridor,supplemented by Haiyuan ancient uplift,and the two are superimposed.

关 键 词：物源分析 长8油层组 陇东地区 鄂尔多斯盆地 

分 类 号：TE132.1[石油与天然气工程—油气勘探]