渤海湾盆地沾化凹陷页岩油形成影响因素分析

Analysis of Influence Factors of Shale Oil Formation in Zhanhua Depression of Bohai Bay Basin

根据沾化凹陷沙河街组三段泥页岩有机地球化学参数分析,研究区以生油为主。通过对沾化凹陷构造运动史、断层活动时间、岩浆活动的研究以及烃源岩生烃门限;结合页岩油的勘探情况,结果表明沾化凹陷沙河街组三段泥页岩生烃潜力巨大,并且泥页岩裂缝发育,油气运移发生在构造运动和岩浆侵入停止之后,油气可运移到泥页岩裂缝储层中,从而预示着沾化凹陷具有形成页岩油的良好地质条件,勘探潜力巨大。

According to the organic geochemical analysis of the third member of the Shahejie Formation mud shale,oil was mainly generated by the source rock in Zhanhua Depression,Bohai Bay Basin.The oil generation potential of the third member of the Shahejie Formation shale was great.Based on the analysis of tectonic movement,the time of fault activity,hydrocarbon generation threshold determination of the source rock,and shale oil exploration situation,the research results have shown that the third member of the Shahejie Formation shale oil generation potential was great and the mud shale fracture developed.Hydrocarbon migrated after tectonic movement and magma intrusion stopped,and migrated to the mud shale fractured reservoir.The geological condition is conducive to shale oil and mud shale has a great exploration potential in Zhanhua Depression.