塔里木盆地麦盖提斜坡罗斯2井奥陶系油气藏的TSR作用:来自分子标志物的证据  

Effect of TSR on the crude oil in Ordovician reservoirs of Well Luosi-2 from Maigaiti Slope,Tarim Basin: Evidences from molecular markers

作　　者：马安来[1,2] 金之钧 朱翠山[3] 顾忆[4] 李慧莉[1] 路清华[4] Ma Anlai;Jin Zhijun;Zhu Cuishan;Gu Yi;Li Huili;Lu Qinghua(Petroeum Exploration and Production Research Institute,SINOPEC,Beijing,100083;State Key Laboratory of Organic Geochemistry,Guangzhou,Guangdong 510640,China;College of Resources and Environment,Yangtze University,Wuhan,Hubei 430100,China;Wuxi Research Institute of Petroleum Geology Petroleum Exploration and Production Research Institute,SINOPEC,Wuxi,Jiangsu 214126,China)

机构地区：[1]中国石化石油勘探开发研究院,北京100083 [2]有机地球化学国家重点实验室,广东广州510640 [3]长江大学资源学院,湖北武汉430100 [4]中国石化石油勘探开发研究院无锡石油地质研究所,江苏无锡214126

出　　处：《石油与天然气地质》2018年第4期730-737,748,共9页Oil & Gas Geology

基　　金：国家自然科学基金项目(41772153);有机地球化学国家重点实验室开放基金项目(SKLOG-201702);国家科技重大专项(2017ZX05005-002);中石化科技部项目(P16090;P17049-1)

摘　　要：采用内标物色谱质谱方法,对罗斯2井原油中金刚烷系列、二苯并噻吩系列和硫代金刚烷系列进行了定量分析。罗斯2井原油中金刚烷系列化合物含量、4-甲基双金刚烷+3-甲基双金刚烷含量分别为10 818,331μg/g,表明原油经历了较强的裂解作用,裂解比例达到90%左右。金刚烷指标表明原油成熟度在1.6%以上。罗斯2井原油可以检测到完整的硫代单金刚烷、硫代双金刚烷和硫代三金刚烷系列,硫代金刚烷、硫代单金刚烷、硫代双金刚烷和硫代三金刚烷含量分别为192,160,26和6μg/g。高含量的硫代金刚烷表明罗斯2井原油的TSR强度大于绝大多数塔中地区下奥陶统鹰山组原油。TSR作用导致罗斯2井原油具有较高含量的二苯并噻吩,含量为8 201μg/g,使得原油二苯并噻吩/菲比值(DBT/P)增加,导致C_0-/C_1-DBTs和C_1-/C_2-DBTs比值增加。The study made a quantitative analysis of diamondoid,dibenzothiophenes and thiadiamondoid series in the crude oil from Well Luosi-2 via the GC-MS method with internal standards.The concentrations of diamondoid and 4-+3-methyldiamantane(4-+3-MD)are 10818 and 331 g/g in the study area,suggesting that the crude oil suffered serious cracking and the proportion of cracking oil is up to about 90%.The diamondoid indexes show that the maturity of crude oil from Well Luosi-2 is above 1.6%R c.Complete thiaadamantane,thiadiamantane,thiatriamantane series were detected from the Well Luosi-2 crude oil,with the contents of thiadiamondoid,thiaadamantane,thiadiamantane,thiatriamantane being 192,160,26 and 6μg/g respectively.The high concentration of thiadiamondoid is a sign that the degree of thermochemical sulfate reduction(TSR)of oil from Well Luosi-2 is higher than that of most crude oil from the Lower Ordovician Yingshan Formation in Tazhong uplift.TSR results in the higher DBTs,about 8 201μg/g,in the oil from Well Luosi-2,and in turn the higher ratios of DBT/P,C 0-/C 1-DBT and C 1-/C 2-DBT.

关 键 词：硫代金刚烷 金刚烷 二苯并噻吩 硫酸盐热化学还原反应(TSR) 罗斯2井 塔里木盆地 

分 类 号：TE135[石油与天然气工程—油气勘探]