沉积与特提斯地质2018，Vol.38Issue(1)：96-102,7.
柴西油砂山地区油砂有机地球化学特征研究
Organic geochemical signatures of the oil sands from the Youshashan area,western Qaidam Basin,Qinghai
摘要
Abstract
The oil sands resources are interpreted as the significant unconventional oil and gas resources in China. The emphasis of the present paper is placed on the chromatographic analysis and mass spectrographic analysis of eight pieces of oil sands samples from the Upper Ganchaigou Formation (N 1 )in the Youshashan area in order to examine ancient sedimentary environments,maturity and origin of parent matter types. The results in this study show that the saturated hydrocarbons range between 0. 53 and 0. 81,indicating higher oil contents. The m(Pr)/ m (Ph)ratios vary from 0. 43 to 0. 26,with an average of 0. 32 (8),indicating a relatively deep-water and highly reducing environment of the source rocks. The parameters for oil sands evolution m[C 31αβ22S / 22(S + R)]and m [C 32αβ22S / 22(S + R)]are more than 0. 5 or 0. 6,indicating that all the eight oil sands samples are maturated oil sands samples and subjected to biodegradation. The triangular diagram of the parameters of steranes C27 ,C 28 and C29 indicate that the parent matter types of the oil sands belong to the lower aquatic organisms mixed with higher plants. The oil sands in the study area have higher contents of saturated hydrocarbons,wider outcropped area and greater thickness,and thus may be considered highly prospective for the unconventional oil and gas resources.关键词
油砂/地球化学/母质类型/沉积环境/成熟度Key words
Oil sands/ geochemistry/ parent type/ sedimentary environment/ maturity分类
能源科技引用本文复制引用
宋红莎,韩梅梅,曹占元,张晓宝,陈文磊..柴西油砂山地区油砂有机地球化学特征研究[J].沉积与特提斯地质,2018,38(1):96-102,7.基金项目
中国科学院2012年度"西部之光"人才计划支持项目"马海地区深层构造特征及油气藏成因类型研究"(1308RJZA310)和甘肃省重点实验室专项(1309RTSA041)联合资助 （1308RJZA310）
