标题:
沾化凹陷罗家地区沙三下亚段页岩地球化学特征及其评价Geochemical Characteristics of Shale in the Es3L of Shahejie Formation in Luojia Area of Zhanhua Sag and Its Evaluation
作者:
李航, 陈波, 李一贤
关键字:
有机质丰度, 有机质类型, 有机质成熟度, 沙三下亚段, 沾化凹陷Organic Abundance, Organic Type, Organic Maturity, Es3L of Shahejie Formation, Zhanhua Sag
期刊名称:
《Journal of Oil and Gas Technology》, Vol.38 No.3, 2016-09-30
摘要:
通过对有机质丰度、有机质类型、有机质成熟度的特征进行详细研究，综合分析了沙三下亚段(Es3L)页岩地球化学特征并对其进行了评价。研究结果表明，在有机质丰度上，Es3L页岩总有机碳质量分数(w(TOC))和氯仿沥青“A”(w(“A”))质量分数均较高，是页岩油的主要富集层位；在有机质类型上，有机质显微组分和热解烃质量分数w(S2)~w(TOC)线性回归均表明Es3L页岩有机质类型为I型，具有较好的生油潜力；在有机质成熟度上，镜质体反射率和最高热解峰温均表明Es3L页岩中的有机质处于成熟阶段，正在大量生油。
The geochemical characteristics of shales in Es3L of Zhanhua Depression were studied and evaluated through analyzing the abundance, type and maturity of the organic matter in detail. Study indicates that the Es3L shales provide main accommodation for oil, which is evidenced by high mass factors of w(TOC) and chloroform bitumen w(“A”). The Es3L shales are dominated by Type I Organic Matter; they are high oil-generating potential, which is evidenced by the microscopic components and the w(TOC) linear regression for w(S2) (pyrolysis hydrocarbon). The organic matter of the Es3L shales is so mature that they can generate a large volume of oils, which is illustrated by the vitrinite reflectance and the highest thermal pyrolysis peak temperature.