霸县洼槽下第三系沙三段烃源岩生烃潜力研究

Hydrocarbon Generation Potential of the Es_3 Source Rocks in Baxian Sag

根据相关分析化验资料,从有机质丰度、类型、热演化程度3个方面,对霸县洼槽沙三段烃源岩生烃潜力进行了评价,并进一步分析了其资源潜力。研究结果表明:高有机质丰度烃源岩主要分布在沙三中、沙三下亚段,综合评价为好烃源岩,沙三上亚段为中等烃源岩;烃源岩有机质类型以II型为主;烃源岩整体处于低成熟-成熟热演化阶段,具有良好的生烃潜力。生烃史模拟表明,兴隆1井沙三段烃源岩在沙二段沉积末期进入成熟门限,现阶段霸县洼槽沉积中心沙三段烃源岩处于成熟-高成熟热演化阶段,而斜坡带主要处于低成熟-成熟热演化阶段。

Based on related analytical data,the hydrocarbon generation potential of Es3 source rocks in Baxian Sag was evaluated from the aspects of organic matter abundance,its type and thermal evolution process,and its source potential was further analyzed.The result reveals that the source rocks with high organic matter abundant are mostly distributed in the middle and lower parts of Es3 and integral evaluation indicates that they are good source rocks Es4 formations,and the grade are good source rocks.The grade of Es3 is medium source rock.The organic matter is mainly of Ⅱ type,and source rocks are at low maturity-maturity stage,they have good hydrocarbon generation potential These manifest that the resource potential of source rocks is high.The result of the hydrocarbon generation history simulation indicates that the Es3 source rocks in Well Xinglong 1 are in the maturity threshold in the Es2 sedimentation period.And now,the Es3 source rocks in the center of the Baxian Sag is at maturity-high maturity stage and slope of it is low maturity-maturity evolution stage.