陕北斜坡东南部H地区长7烃源岩特征

Evaluation of Chang7 Source Rock in H Area in the Southeast of Northern Shanxi Slope

通过有机岩石学和有机地球化学相互结合综合分析的方法开展对陕北斜坡东南部H地区长7烃源岩评价研究。结果表明,长7烃源岩形成于水体较深、盐度不高、水体分层不明显、还原的沉积环境,为有机质高度富集的优质油源岩;有机质类型以腐泥-腐植型为主;干酪根以Ⅱ型干酪根为主,其均已进入成熟期。

By the comprehensive analysis method combining the organic petrology and the organic geochemistry, evaluation study was carried out on Chang7 source rock in H area in the southeast of Northern Shanxi Slope. The result shows that, the Chang7 source rock was formed under the reductive sedimentary condition with deep water body, low salinity and indistinct delaminating water body, it was high quality oil source rock with organic matter enrichment; the organic matter of the source was mainly sapropel-humic type; the kerogen was type II,and the organic matter has been in maturation evolution stage.