摘要
针对松辽盆地齐家古龙凹陷北部青一段页岩油顶部的互层型河道砂体,首先通过井震分析、对比,明确了河道砂体井震响应特征,利用小时窗地震切片扫描技术识别了青一段顶部河道整体呈现鸟足状外形特征。然后利用波形指示波阻抗反演技术精细刻画青一段顶部两期河道内部砂体分布特征,分析认为河道北部砂体相对更发育。最后通过成藏条件综合分析,认为本区油藏类型是构造背景控制下的岩性油藏,表现为“一砂一藏”、在构造高部位富集成藏的模式。基于该模式优选4口钻探目标,为该地区页岩油互层型河道砂岩油藏规模勘探开发奠定了基础。
For interbedded channel sandstone on top of the shale oil of Qing1 member in the north of Qijia-Gulong Depression in Songliao Basin,firstly,the characteristics of logging and seismic response of channel sand bodies are clarified through well and seismic data comparison.Then,the bird-footshaped channels at the top of the Qing1 member are identified by using small time window scanning technique based on seismic slices.After that,the waveform indicated impedance inversion technique is used to finely depict the spatial distribution characteristics of the two-stage channel sand bodies at the top of the Qing1 member.The depiction reveals that the impedance inside the channels changes abruptly,and it is low in the south away from the source area and high in the north near the source area.The analysis shows that the sand bodies north of the channels are relatively more developed.Finally,through a comprehensive analysis of reservoir forming conditions,it is considered that the reservoir type in this area is lithologic oil reservoirs under the control of structural background.The reservoir model is characterized by“one sand body,one reservoir”and enrichment at high structural positions.With this model,four well targets are optimized,which lays a foundation for large-scale exploration and development of the interbedded channel sandstone reservoirs of shale oil in this area.
作者
党虎强
胡晓丹
孟阳
赵婧
阎振华
李想
DANG Huqiang;HU Xiaodan;MENG Yang;ZHAO Jing;YAN Zhenhua;LI Xiang(Geological Research Center,GRI,BGP Inc.,CNPC,Zhuozhou,Hebei 072750,China)
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2022年第S02期130-133,230-231,共6页
Oil Geophysical Prospecting
关键词
页岩油
互层型河道砂岩
地震切片
波阻抗反演
成藏模式
shale oil
interbedded channel sandstone
seismic slice
impedance inversion
reservoir model
