塔里木盆地塔东2井稠油地球化学研究  

GEOCHEMISTRY OF THE HEAVY OILS FROM WELL TD2 IN TARIM BASIN,NW CHINA

作　　者：马安来[1] 张水昌[2] 张大江[2] 梁狄刚[2] 王飞宇[1] 

机构地区：[1]石油大学 [2]中国石油天然气股份有限公司勘探开发研究院,北京100083

出　　处：《地质科技情报》2004年第4期59-63,共5页Geological Science and Technology Information

基　　金：国家"九五"科技攻关项目(99-111-01-03)

摘　　要：运用棒色谱、碳同位素、色谱、色谱—质谱、色谱—质谱—质谱、流体包裹体技术研究了塔里木盆地中央隆起带东段的TD2井寒武系储层中的稠油。该稠油具有w(Pr)/w(Ph)高,伽马蜡烷、24-降胆甾烷、C28甾烷、甲藻甾烷、三芳甲藻甾烷、4-甲基-24-乙基胆甾烷及芳构化甾烷含量均高的特点,地质分析与油源对比结果表明原油来源于寒武系。原油中含有25-降藿烷系列,指示原油曾发生过生物降解作用,芳烃馏分中存在大量的菲、蒽、苯并蒽、苯并荧蒽、芘等化合物及流体包裹体均一化温度均表明原油曾经历过热蚀变作用。流体包裹体均一化温度和埋藏史的分析表明TD2井的原油是在450～440Ma间形成的。Heavy oil,acquired in the Cambrian reservoir from well TD2, located in the east of the central uplift in Tarim Basin, NW China,is studied by using TLC-FID, carbon isotope, GC, GC-MS, GC-MS-MS, fluid inclusion technologies.The oil with the w(Pr)/w(Ph) value of 1.32 is rich in gammacerane, 24-norcholestane,dinosterane, triaromatic dinosterane,4-methyl-24-ethylcholestane,and 4-methyl-24-ethyl triaromatic cholestane. The geology analysis and oil-source correlation show the heavy oil has close genetic relationship with the Cambrian source rocks,while the 25-norhopane of the oils indicate that the oil could have been biodegraded.A large amount of the phenanthrene, fluoranthene, benzoanthracene, benzofluoranthene, pyrene and the homogenization temperature of the fluid inclusion suggest the oil had suffered thermal alteration. Combined with the burial history of well TD2, the homogenization temperature of the fluid inclusion indicate the reservoir formed during 450—440 Ma period.

关 键 词：油源对比 成藏史 稠油 生物降解 热蚀变 塔里木盆地 

分 类 号：TE122.1[石油与天然气工程—油气勘探]