宣东地区下花园组地层页岩气源岩有机地化特征分析

Analysis of Organic Geochemistry Characteristics of Gas Source Rocks from Xiahuayuan Formation in Xuandong Area

有机地化特征是评价页岩气赋存地质条件的重要依据。通过采集宣东地区ZK1、ZK3、张页1井下花园组暗色泥页岩样品,对其进行有机地化特征分析研究,并进行页岩气有机地化特征分析评价。结果表明:宣东地区下花园组地层显微组分以惰质组和镜质组为主体,干酪根类型为Ⅲ型;TOC含量较高,平均为3.873%;Ro平均为1.44%,Tmax平均491℃,属于高成熟湿气阶段。下花园组地层生烃潜力良好,研究结果为今后宣东地区页岩气源岩特征分析提供了基础。

Organic geochemstry is an important basis for evaluating the geological conditions of shale gas occurrence.The dark mud shale samples of the Xiahuayuan formation of ZK1,ZK3 and ZY 1 are collected to analyze and evaluate the organic geochemical characteristics of shale gas.The results show that the macerals of xiahuayuan formation in Xuandong area are mainly inerter formation and vitreous formation,the kerogen type is mainly type III;TOC is high,averaging 3.873%;the average of Ro is 1.44%,and the average Tmax is 491℃,the maturity belongs to stage of high mature moisture.The xiahuayuan formation has a good hydrocarbon generation potential and the research results provide a basis for the analysis of the characteristics of shale gas in Xuandong area inthe future.