辽河油田外围盆地元宝山凹陷烃源岩评价

EVALUATION OF YUAN BAOSHAN SAG PERIPHERY BASIN HYDROCARBON SOURCE ROCKS IN LIAOHE OILFIELD

为继续深化辽河油田外围油气勘探工作,稳定千万吨级产量规模,对元宝山凹陷烃源岩特征进行了评价。依据干酪根元素组成、岩石热解参数、沥青"A"族组成、饱和烃馏分组成等资料,对烃源岩的有机质类型分析后发现,第1有机相带有机质类型主要为Ⅲ型,第2有机相带有机质类型以Ⅰ和Ⅱ1为主,第3有机相带有机质类型为Ⅱ2和Ⅲ型。结合低熟源岩有机质丰度分级评价标准,对3种有机相带的有机碳、沥青"A"含量、总烃、生烃潜量PC以及岩石显微组分含量等丰度参数进行了研究,研究认为元宝山凹陷第1有机相带为差生油岩,第2有机相带好生油岩,第3有机相带为差—非生油岩。

In order to continue to deepen the oil-gas exploration in the peripheral area of Liaohe oilfield and sta-bilize ten-million-ton-level production scale,the characteristics of hydrocarbon source rocks in Yuanbaoshansag are evaluated. According to some data such as element composition of kerogen,rock pyrolysis parameters,composition of asphalt'A'cluster and the composition of saturated hydrocarbon fraction,through the analysis onorganic matter types of hydrocarbon source rocks,we find something as follows:The organic matter type of thefirst organic facies zone is mainly type III. The organic matter type of the second organic facies zone is mainlytype Ⅰand typeⅡ1. The organic matter type of the third the organic facies zone is type II 2 and type III. Basedon the organic matter abundance grading estimating standard of low mature source rock,this thesis does researchon some abundance parameters such as organic carbon content,asphalt'A'content,potential content of total hy-drocarbon,potential content(PC)of hydrocarbon generation and maceral content of rock in 3 kinds of organic facies zones. The research shows that the first organic facies zone of Yuanbaoshan sag is poor generating rock andthat the second organic facies zone is good generating rock and that the third organic facies zone is between poorgenerating rock and non-generating rock.