东营凹陷沙三段烃源岩生烃模式研究  

Research on hydrocarbon - generating mode of Es_3 source rocks in Dongying Sag.

作　　者：张守春[1] 

机构地区：[1]胜利油田有限公司地质科学研究院

出　　处：《油气地质与采收率》2005年第4期49-51,i0005,i0006,共4页Petroleum Geology and Recovery Efficiency

摘　　要：为了进一步明确分散有机质(一般烃源岩)与有机质富集层(优质烃源岩)生烃过程的差异,采用东营凹陷沙三段中、下亚段烃源岩岩心进行生排烃模拟实验。结合地质剖面分析,认为沙三段中、下亚段烃源岩的生烃特征有明显的不同。沙三段中亚段主要生烃阶段为Ro大于0.5%;沙三段下亚段在Ro为0.4%-0.5%时可生成少量低熟油,当Ro大于0.5%时进入成熟阶段,具有较高的油气产率。沙三段下亚段烃源岩比中亚段明显具有更高的生烃潜力,且生烃区间较大。这取决于其特定的沉积环境所形成的烃源岩在有机质类型、富集程度等方面的差异。In order to study the different hydrocarbon generating process of dispersed organic matters （common source rocks） and organic - rich sediments （high - quality source rocks）, hydrocarbon generation and expulsion experiments were made by source rock cores of lower and middle Es3 from Dongying Sag directly. Combined with geologic profile analysis, it is considered that hydrocarbon -generating characteristics of the two source rocks were different to a great extent. Middle Es3 source rocks greatly generated hydrocarbon when Ro 〉0.5%.Lower Es3 source rocks generated a small amount of low - mature oil when Ro was 0.4% to 0.5% ; it entered mature period and had higher hydrocarbon production rate when Ro 〉 0.5%. Lower Es3 source rocks were higher in hydrocarbon generation potential than middle Es3 and had a longer hydrocarbon generation period.This depends on the source rocks difference on type and abundance degree of the organic matters formed under special sedimentary environment.

关 键 词：沙三段烃源岩 生排烃 模拟实验 生烃模式 东营凹陷 

分 类 号：TE125.2[石油与天然气工程—油气勘探]