辽西金羊盆地羊D1井油气充注成藏特征:来自流体包裹体显微荧光光谱的证据  

Hydrocarbon charging characteristics of YD1 well in Jinyang Basin,western Liaoning Province:Evidences from microscopic fluorescence spectroscopy study in fluid inclusions

作　　者：孙守亮[1] 陈树旺[1] 李永飞[1] 张涛[1] 孙月成 孙求实[1] 郜晓勇[1] SUN Shou-liang;CHEN Shu-wang;LI Yong-fei;ZHANG Tao;SUN Yue-cheng;SUN Qiu-shi;GAO Xiao-yong(Shenyang Center of Geological Survey,China Geological Survey,Shenyang 110032,China)

机构地区：[1]中国地质调查局沈阳地质调查中心,辽宁沈阳110032

出　　处：《地球化学》2020年第1期84-94,共11页Geochimica

基　　金：中国地质调查项目(DD20190098,DD20160167);国家自然科学基金(41790451)。

摘　　要：通过流体包裹体岩相学及显微荧光光谱方法,详细分析了辽西金羊盆地羊D1井的油气充注特征。羊D1井髫髻山组检测到大量黄色、黄绿色、蓝绿色荧光油包裹体及黑灰色纯气相包裹体。通过宿主矿物及同期盐水包裹体均一温度统计分析,认为羊D1井油气充注可划分出4个幕次。另外,羊D1井有机包裹体微束荧光光谱呈现出两种不同的光谱谱型形态及结构,认为羊D1井至少存在两个油源。主峰波长在530.9~535.0nm之间的油源,随着成熟度的增加,分3幕充注成藏。主峰波长在491.2~491.6nm之间的油源,为1幕充注。对比羊D1井及邻区牛D1井原油生物标志物及微束荧光光谱特征,推测前一油源来自中、新元古界,并在早期充注,随后遭破坏改造、降解形成沥青;后一油源来自下侏罗统北票组。The hydrocarbon charging characteristics of the YD1 well in the Jinyang Basin of the western Liaoning Province were analyzed in detail by fluid inclusion petrography and microscopic fluorescence spectra.Numerous inclusions with yellow,yellow-green,and blue-green fluorescent color as well as pure gas inclusions with a dark grey color were detected in the samples from the Tiaojishan Formation(J2 t)in the YD1 well.The homogeneous temperature of the host minerals and coeval brine inclusions results indicate four charging episodes of the YD1 well.In addition,the micro-beam fluorescence spectra of the hydrocarbon inclusions exhibit two different spectrum patterns and structures,indicating that there are at least two different sources of the hydrocarbons in the YD1 well.The oil source with the main peak wavelength ranges from 530.9 to 535.0 nm was charged in three episodes and a sequence of increasing maturation level.Whereas,the oil source with the main peak wavelength ranges from 491.2 to 491.6 nm was charged in a single episode.By coupling the biomarker and micro-beam X-ray fluorescence characteristics of the crude oil from YD1 well and the ND1 well in the adjacent area,we can deduce that the former oil source is derived from Mesoproterozoic source rocks,charged at an early stage,and then destroyed and degraded to bitumen;the latter oil source is derived from the Middle Jurassic Beipiao Formation.

关 键 词：油气充注 成藏特征 荧光光谱 流体包裹体 羊D1井 金羊盆地 

分 类 号：P593[天文地球—地球化学]