摘要
辽西金羊盆地是中国北方侏罗系发育最完备地区之一,其主要烃源岩层系北票组为油气勘探关注的重点层位。利用实测剖面、钻井岩心观察及地球化学分析等资料,分析北票组沉积环境与烃源岩成因。结果表明:研究区滨浅湖亚相可识别泥质浅湖、砂质浅湖及湖沼沉积,辫状河三角洲沉积环境主要发育河口坝、水下分流河道和水下分流河道间沉积微相;半深湖成因的暗色泥岩为研究区优质烃源岩层系,湖沼型的暗色炭质泥岩次之;盆地边缘的浅湖及水下分流河道间沉积的暗色泥岩厚度较薄,有机质丰度较低,生烃潜力不大,为中等-劣质烃源岩;优质烃源岩成因模式主要为形成于滨浅湖亚相湖沼环境的含煤层系及形成于半深湖深水成因的烃源岩。该结果为金羊盆地北票组油气资源潜力评价提供地质依据。
Jinyang Basin located in North China is one of the areas with best developed Jurassic strata.Beipiao Formation is the focus of oil and gas exploration in Jinyang Basin,basin as it serves as the main source rock.The sedimentary environment and source rock genesis of Beipiao Formation are analyzed by means of measured section,core observation and geochemical analysis.The results show that the littoral shallow lake subfacies in the study area can identify muddy shallow lake,sandy shallow lake and limnetic deposit,the braided river delta subfacies mainly include estuary bar,underwater distributary channel and inter channel sedimentary microfacies.The dark mudstone in the semi deep lake is the high quality source rock in this area,followed by the carbonaceous mudstone formed in the lake marsh.The dark mudstones deposited in shallow lakes and underwater distributary channels at the edge of the basin are medium to poor source rocks with thin thickness,low organic matter abundance and low hydrocarbon generation potential.The high-quality source rocks of Beipiao Formation in Jinyang Basin are mainly composed of carbonaceous mudstones formed in limnetic environment of shore shallow lake subfacies and dark mudstones formed in deep water of semi deep lake subfacies.The results provide a geological basis for the evaluation of oil and gas resource potential of Beipiao Formation in Jinyang Basin.
作者
孙守亮
张涛
刘淼
李永飞
陈树旺
张健
唐友军
孙求实
SUN Shouliang;ZHANG Tao;LIU Miao;LI Yongfei;CHEN Shuwang;ZHANG Jian;TANG Youjun;SUN Qiushi(Shenyang Center of Geological Survey,China Geological Survey,Shenyang,Liaoning110000,China;School of Earth Environmentand Water Resources,Yangtze University,Wuhan,Hubei 430100,China)
出处
《东北石油大学学报》
CAS
北大核心
2019年第6期1-12,I0001,共13页
Journal of Northeast Petroleum University
基金
国家自然科学基金项目(41790451)
中国地质调查局项目(DD20160167)
中国地质调查局项目(DD20190097)
中国地质调查局项目(DD20190098)
关键词
烃源岩成因
沉积环境
北票组
侏罗系
金羊盆地
辽宁西部
genesis of source rock
sedimentary environment
Beipiao Formation
Jurassic
Jinyang Basin
Western Liaoning
