摘要
断溶体为塔里木盆地奥陶系一种重要的碳酸盐岩储集体,是油气勘探开发的重要目标之一。根据断溶体形成机理,结合实际岩石物理参数,设计断溶体正演模型,通过正演模拟得到断溶体地震反射特征。正演结果表明,断溶体以大型走滑断裂为核心,形成"花束"状地震反射;大型走滑断裂处同相轴"错断",断溶体缝洞型储层表现为单个"串珠"状反射或强、弱"串珠"反射群等特征。正演模拟结果与实际地震资料吻合较好,证明了设计的断溶体模型较为可靠,可以指导地震剖面上断溶体的识别。
The fault-karst reservoir is a kind of the Ordovician carbonate reservoirs in the Tarim Basin,which is also one of the important targets for the hydrocarbon exploration and development.According to the formation mechanism of fault-karst reservoir combined with real petrophysical parameters,a seismic model of faultkarst reservoir is built,and seismic reflection characteristics of fault-karst reservoir are obtained with seismic forward modeling.The seismic modeling results show that the fault-karst reservoir is centered on large-scale strike-slip faults,forming a bouquet-like seismic reflection.The large-scale strike-slip faults show faultedfracture on seismic events.Fault-karst fracture-cavity reservoirs show single bead-like reflection,strong or weak bead-like reflection groups.The seismic modeling results agree well with seismic data,which proves that the built fault-karst reservoir model is reliable and can help the identification of fault-karst reservoirs on seismic sections.
作者
马乃拜
金圣林
杨瑞召
孟令彬
王力
胡永蓁
MA Naibai;JIN Shenglin;YANG Ruizhao;MENG Linghin;WANG Li;HU Yongzhen(Research Institute of Exploration and Production,Northwest Oilfield Branch Co. , SINOPEC, Urumqi,Xinjiang 830011, China;School of Geosciences and Survey Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China)
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2019年第2期398-403,I0009-I0010,共7页
Oil Geophysical Prospecting
基金
国家重点研发计划项目"井-地联合CO2运移及封存监测技术研究及设备研制"(2018YFB0605603)资助
关键词
顺北地区
断溶体
正演模拟
大型走滑断裂
“串珠”状反射
Shunbei area
fault-karst reservoir
forward modeling
large-scale strike-slip fault
bead-like reflection
