渤海湾盆地黄骅坳陷乌马营地区断盖配置对上古生界天然气向孔店组运移的控制  

Control of fault-caprock configuration on the migration of the Upper Paleozoic natural gasto Kongdian Formation in Wumaying area, Huanghua Depression, Bohai Bay Basin

作　　者：蒋飞 付广[1] 张姣 王浩然[1] JIANG Fei;FU Guang;ZHANG Jiao;WANG Haoran(College of Earth Science,Northeast Petroleum University,Daqing 163318,China)

机构地区：[1]东北石油大学地球科学学院,黑龙江大庆163318

出　　处：《天然气地球科学》2024年第6期938-948,共11页Natural Gas Geoscience

基　　金：黑龙江省自然科学基金联合引导项目(编号:LH2022D010);东北石油大学人才引进科研启动经费资助项目(编号:1305021805)联合资助。

摘　　要：渤海湾盆地黄骅坳陷乌马营地区孔店组气藏的发现,带来了天然气成藏层系的新突破,开辟了新的勘探领域。为探究孔店组天然气富集规律和资源潜力,推动黄骅坳陷古近系气藏的勘探,以天然气供给为核心,利用井震资料,通过定量表征方式,研究乌马营地区断盖配置对上古生界煤系烃源岩生成的天然气向孔店组运移的控制作用。结果表明:①输导断层为天然气向孔店组垂向运移提供通道,且断层在成藏期活动速率大于3.6 m/Ma的部位是优势输导通道;②孔三段—中生界盖层的断盖配置垂向封闭性控制天然气运聚层位,盖层断接厚度小于34 m的部位垂向渗漏,有利于天然气穿过盖层向孔店组运移;③断层输导与断盖配置封闭性共同控制天然气向孔店组的供给部位,且断层优势输导通道与断盖配置垂向渗漏区的重叠部位是天然气向孔店组运移的有利部位。The discovery of gas reservoirs in the Kongdian Formation in Wumaying area of Huanghua Depres⁃sion of Bohai Bay Basin brought a new breakthrough in natural gas accumulation layers and opened up a new ex⁃ploration field.To reveal the natural gas accumulation pattern and resource potential of the Kongdian Forma⁃tion,and to promote the exploration of the Paleogene gas reservoirs in the Huanghua Depression,the control⁃ling effects of fault-caprock configuration in the Wumaying area on natural gas migration from the coal source rock of the Upper Paleozoic to the Kongdian Formation was quantitatively studied with the focus on the supply of natural gas,by using well-seismic data.The results show that:(1)Transportation faults provide channels for the vertical migration of natural gas to the Kongdian Formation,and position where fault activity rate during the accumulation period is greater than 3.6 m/Ma is the dominant conduit.(2)The fault-caprock configuration sealing of the third member of Kongdian Formation-Mesozoic Erathem caprocks controls the migration and accu⁃mulation layers of natural gas.Vertical leakage occurs in area where caprock faulted-contact thickness is less than 34 m,which is favorable for the migration of natural gas through the caprock to the Kongdian Formation.(3)Fault transmission and fault-caprock configurations sealing jointly control the supply of natural gas to the Kongdian Formation,and the overlap between fault’s dominant conduits and the vertical leakage zones of faultcaprock configuration is a favorable site for natural gas migration to the Kongdian Formation.

关 键 词：天然气 输导断层 盖层 断盖配置 煤系烃源岩 孔店组 黄骅坳陷 

分 类 号：TE122.1[石油与天然气工程—油气勘探]