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川东大池干井构造带池55井失利因素分析 预览

Analysis of Failure Factors of Chi 55 Well in Dachi Dry Well Structural Belt
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摘要 以川东大池干井构造带池55井为例,先运用实际的钻井资料对其进行了构造恢复。然后结合已有的速度资料,建立了工区合理的地质构造模型。最后利用成熟的Tesseral软件对川东大池干井构造带池55井进行了模型正演分析并与实际的地震剖面进行了比较,得出其失利的原因:由于二叠系下统底界倒转带的存在,二叠系上统底界和二叠系下统底界的地层厚度在地震剖面上发生急剧增厚的现象;二叠系下统底界在地震剖面上表现的高点位置与其地腹实际高点位置发生了较大的偏移,二叠系下统底界在地震剖面上表现的高点位置不是其地腹真实的高点位置;其地腹真实的高点位置在地震剖面上应该是二叠系上统底界和二叠系下统底界之间地层厚度开始增大的转折点位置。 Taking Chi 55 Well in Dachi Dry Well structural belt of Eastern Sichuan as an example,the actual drilling data are used to restore the structure,and a reasonable geological structure model is established based on the existing velocity data.The model forward analysis is carried out by using mature Tesseral software and compared with the actual seismic profile:Because of the existence of bottom boundary inversion zone of the lower Permian,the thickness of the bottom boundary of the upper Permian and the lower Permian has increased sharply in seismic profiles;the high point position of the lower Permian bottom boundary in seismic section is greatly offset from the actual high point position of its hinterland,and the high point position of the lower Permian bottom boundary in seismic section is not the real high point position of its hinterland;the real high point in the hinterland should be the turning point where the thickness of the stratum begins to increase between the bottom boundary of the upper Permian and the bottom boundary of the lower Permian.
作者 王身建 陈琦 刘青 WANG Shenjian;CHEN Qi;LIU Qing(Guangdong University of Petrochemical Technology,Maoming 525000,China;Guangdong Unconventional Energy Engineering Technology Research Center,Maoming 525000,China)
出处 《广东石油化工学院学报》 2019年第1期15-18,共4页 Journal of Maoming College
基金 广东石油化工学院人才引进项目(702-650127,702-517174).
关键词 川东地区 大池干井 模型正演 高点偏移 地层增厚 厚度转折点 East Sichuan area Dachi dry well model forward height offset formation thickening thickness turning point
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