摘要
对千米桥古潜山高蜡凝析油C12 —C35 液态烃馏分进行精细的化学组成剖析 ,是开展准确的油源研究之基础。原油地球化学特征分析表明 ,受凝析油形成过程中的化合物分馏效应影响 ,常规甾、萜烷含量甚微且分布面貌已不同程度失真 ;凝析油具有相对富集的重排补身烷和较高的苯并 [e]芘及单峰的系列等特征性分布指纹 ,可以作为油源研究的基础。单体烃碳同位素、馏分碳同位素等的油 油对比表明 ,板深 4、7、8井奥陶系凝析油与板深 35井沙三段轻质油等第三系原油具有可比性 ,应为同源产物 ;无论是馏分碳同位素、单体烃碳同位素还是生物标志物等的油 岩对比均表明 ,板深 4、7、8井奥陶系凝析油与板深 7井、板深 35井沙三段泥岩具有母源成因联系 ,沙三段是千米桥古潜山油藏的油源层。图 5表 4参 1
Intensive researches on the chemical component of the C 12 -C 35 liquid fraction of high waxy condensate associated oil in Qianmiqiao buried hill reservoir have been conducted. This is important to proceed the oil source correlation. In the light of carbon isotope analysis the crude oil is originated from humic type organic matter. Owing to influences of fractionation effect in the procedure of condensate oil formation, Hopane and Sterane had lost their normal distribution features which could not be used to analyze the mature stage and correlate the source; condensate associated oil has relatively concentrated rearranged drimane, high Benzopyrene and single chrysene which can be the basis of choosing the oil source correlation indexes. The oil oil correlation by the monometric hydrocarbon and fractional carbon isotope reveals that the Ordovician condensate oil in Qianmiqiao buried hill reservoir is similar to some Tertiary crude oil such as the light crude oil in Es 3 from Well Banshen 35 and the crude oil in Es 2 from Well Ban G5 and Well Bai 21 4 et al., they should be the products of the same source. The oil rock correlation by the monometric hydrocarbon and fractional carbon isotope and molecular biomarkers indicates that the condensate oils have the original relationship of mother material with the 3rd Member of Shahejie Formation mudstone which is reviewed as the effective hydrocarbon source rock of the condensate oil in the Qianmiqiao buried hill reservoir.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2001年第4期17-21,共5页
Petroleum Exploration and Development
关键词
黄骅坳陷
奥陶系
古潜山构造
凝析油气藏
油源
Huanghua depression, Qianmiqiao, Buried hill reservoir, gas condensate, Geochemical characteristic, Oil source correlation
