低位楔形三角洲砂体岩性尖灭线地震响应特征探索
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摘要
低位三角洲砂体在油气成藏中具有储集条件好、近油源、临近断裂疏导体系和储盖配置好等多个有利条件,近年来渤海油田的勘探实践也证明了低位三角洲砂体是渤海隐蔽油气藏勘探的一个重要领域。从低位楔形三角洲砂体的形成条件分析入手,重点剖析了旅大4-2油田典型低位楔形三角洲砂体的剖面和平面特征,并通过楔形模型正演以及多个低位楔形三角洲砂体的实例分析,探讨了低位域楔形三角洲砂体岩性尖灭线的地震响应特征,提出了"调谐尖灭带"的概念,应用该技术有效地刻画了JX1-2北上倾尖灭型油气藏的岩性尖灭线。"调谐尖灭带"概念完善了少井条件下隐蔽圈闭地震描述技术,为描述类似低位楔形三角洲砂体岩性尖灭线提供了可靠的理论基础,具有很强的可操作性。
Lowstand-tract delta sandst one have many favorable advantages in the oil and gas reservoir conditions:good reservoir,close to oil source,close to the fracture system and better reservoir cap configured etc.The Bohai oil field prac-tice in recent years has proved that lowstand-tract delta sandstone is an important area in Bohai subtle reservoir exploration.First of all,this paper discussed the formation conditions of lowstandtract wedge-shaped delta sandstone,then analyzed the profile and surface characteristics of a typical lowstand-tract wedge-shaped delta sandstone in LD4-2 oilfield.Through the forward wedge modeling and case study of several lowstand-tract wedgeshaped delta sandstones,the author discussed the seismic response characteristics of the pinch-out line on lowstand-tract wedge-shaped delta sandstone,and proposed a new concept "Tuning pinch strip".With the application of this technolo-gy,the author effectively portrayed the lithological pinch-line of JX1-2N Stratigraphic trap.At the same time,Tuning pinch strip " concept improved the seismic descrip-tion technologies of subtle traps under less well conditions and also provides a reliable theoretical basis to describe the pinch-line of similar lowstandtract wedge-shaped delta sandstone with strong operability.
Lowstand-tract delta sandst one have many favorable advantages in the oil and gas reservoir conditions:good reservoir,close to oil source,close to the fracture system and better reservoir cap configured etc.The Bohai oil field prac-tice in recent years has proved that lowstand-tract delta sandstone is an important area in Bohai subtle reservoir exploration.First of all,this paper discussed the formation conditions of lowstandtract wedge-shaped delta sandstone,then analyzed the profile and surface characteristics of a typical lowstand-tract wedge-shaped delta sandstone in LD4-2 oilfield.Through the forward wedge modeling and case study of several lowstand-tract wedgeshaped delta sandstones,the author discussed the seismic response characteristics of the pinch-out line on lowstand-tract wedge-shaped delta sandstone,and proposed a new concept "Tuning pinch strip".With the application of this technolo-gy,the author effectively portrayed the lithological pinch-line of JX1-2N Stratigraphic trap.At the same time,Tuning pinch strip " concept improved the seismic descrip-tion technologies of subtle traps under less well conditions and also provides a reliable theoretical basis to describe the pinch-line of similar lowstandtract wedge-shaped delta sandstone with strong operability.
引文
[1]杨国臣,于炳松.层序地层学的发展现状及其学科地位与研究前沿[J].石油地质与工程,2009,23(2):1-4
[2]初丽兰,纪友亮,张瑞峰,等.饶阳凹陷马西地区近岸水下扇沉积特征及含油性[J].石油地质与工程,2009,23(3):16-20
[3]隋淑玲,谭俊敏.东营凹陷低位三角洲砂体隐蔽油气藏研究[J].油气地质与采收率,2004,11(2):25-28
[4]赖维成,周心怀,滕玉波,等.陆相层序地层研究中的几个问题的探讨[J].中国海上油气,2008,20(5):293-297
[5]赖维成,周心怀,滕玉波,等.多期三角洲叠加层序的体系域划分-以渤海海域BZ19-4区东二层序为例[J].地层学杂志,2009,33(1):82-86
[6]Widess M A.Howthinis a thin bed-[J].Geophys-ics,1973,38(46):1176-1254
[7]凌云研究小组.地震分辫率极限问题的研究[J].石油地球物理勘探,2004,39(4):435～442
[8]凌云研究小组.应用振幅的调谐作用探测地层厚度小于1/4波长地质目标[J].石油地球物理勘探,2003,38(3):268-274
[9]Alistair R Brown.Interpretation of theree-dimen-sional seismic data(Six Edition)[M].AAPG&SEG:199-212
[10]赵迎月,顾汉明,蔡成国.塔河油田三叠系砂岩储层地震正演响应特征[J].天然气工业,2008,28(6):52-55
[2]初丽兰,纪友亮,张瑞峰,等.饶阳凹陷马西地区近岸水下扇沉积特征及含油性[J].石油地质与工程,2009,23(3):16-20
[3]隋淑玲,谭俊敏.东营凹陷低位三角洲砂体隐蔽油气藏研究[J].油气地质与采收率,2004,11(2):25-28
[4]赖维成,周心怀,滕玉波,等.陆相层序地层研究中的几个问题的探讨[J].中国海上油气,2008,20(5):293-297
[5]赖维成,周心怀,滕玉波,等.多期三角洲叠加层序的体系域划分-以渤海海域BZ19-4区东二层序为例[J].地层学杂志,2009,33(1):82-86
[6]Widess M A.Howthinis a thin bed-[J].Geophys-ics,1973,38(46):1176-1254
[7]凌云研究小组.地震分辫率极限问题的研究[J].石油地球物理勘探,2004,39(4):435～442
[8]凌云研究小组.应用振幅的调谐作用探测地层厚度小于1/4波长地质目标[J].石油地球物理勘探,2003,38(3):268-274
[9]Alistair R Brown.Interpretation of theree-dimen-sional seismic data(Six Edition)[M].AAPG&SEG:199-212
[10]赵迎月,顾汉明,蔡成国.塔河油田三叠系砂岩储层地震正演响应特征[J].天然气工业,2008,28(6):52-55
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