摘要
临清坳陷东部中新生代爆发了大规模的火山活动,其形成与华北东部燕山期、喜山期的板块俯冲而引发的裂陷活动有关。利用钻井和物探资料对火成岩的标定和描述,分析了不同层段火成岩的空间分布情况,并探讨了火成岩与油气成藏的关系。分析表明:火成岩能提供热源,促进有机质生烃;发育气孔和微裂缝,能作为有效储层;火成岩的侵入和喷发刺穿了沉积盖层,为深源层油气的向上运移提供通道;在一定条件下,火成岩亦可作为区域盖层对油气起到遮挡作用而形成圈闭;多期热源的叠加可能对先前形成的油气结构和储集性能产生破坏作用。
A massive volcanic activity prevailed in Meso-Cenozoic in the eastern Linqing Depression,due to the tectonic rifting caused by plate subduction in the Yanshan and Himalayan periods in the eastern part of North China.In this paper,drilling and geophysical data are collected to calibrate and describe the igneous rocks,and to define the distribution pattern of different layers of igneous rocks.The relationship between the igneous rocks and oil-gas accumulation is also discussed.The results show that the igneous rock is the source of heat which can promote hydrocarbon generation.The vesicular and crevasse developed around the igneous rock can act as the effective reservoir.The igneous rock intrusion and eruption,which pierced the sedimentary cover,can provide channel for oil and gas migration,and igneous rocks can become a regional cap to prevent oil-gas escape to form traps under certain conditions.However,the superposition of the multiphase heat will damage oil-gas structures and reservoir properties on other side.
出处
《海洋地质前沿》
2015年第5期30-34,共5页
Marine Geology Frontiers
基金
国家油气重大专项"华北上古生界油气资源战略选区"(2009GYXQ17)
关键词
临清坳陷东部
火成岩
油气成藏
eastern Linqing Depression
igneous rock
oil-gas accumulation
