复杂断块油气田的高精度地震采集技术
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摘要
东濮凹陷断块小,构造复杂。经过30多年的勘探开发,如何保持老油区的持续稳产显得尤为重要。弄清复杂断块的成像对于提高钻井成功率、提高采收率都能起到至关重要的作用。针对中原油田复杂断块的高精度地震成像工作,从叠前成像的角度出发,用变面元方法实现了高密度采样的效果,形成了一套高精度表层调查、高密度均匀采样等适合东濮凹陷特点的高精度地震采集技术。经过在马厂、桥口、濮卫等地区的实际应用,取得了显著的勘探效果。
The features of Dongpu Depression were small fault blocks and complex structures.It has experienced oil exploration and development for more than 30 years,therefore how to keep steady oil production in the mature oilfields was critical important.It was critical to clarify the imaging of complex fault blocks for improving the drilling success rate and oil recovery rate.In allusion to the high precision imaging for complex fault blocks in Zhongyuan Oilfield,from the aspect of pre-stack imaging,high-density sampling result was achieved by the means of bin fractionation.A series of high precision seismic acquisition techniques like high accurate surface investigation and high density and uniform sampling were formed.Finally excellent exploration success rate is obtained after it is used in Machang,Qiaokou and Puwei Areas.
The features of Dongpu Depression were small fault blocks and complex structures.It has experienced oil exploration and development for more than 30 years,therefore how to keep steady oil production in the mature oilfields was critical important.It was critical to clarify the imaging of complex fault blocks for improving the drilling success rate and oil recovery rate.In allusion to the high precision imaging for complex fault blocks in Zhongyuan Oilfield,from the aspect of pre-stack imaging,high-density sampling result was achieved by the means of bin fractionation.A series of high precision seismic acquisition techniques like high accurate surface investigation and high density and uniform sampling were formed.Finally excellent exploration success rate is obtained after it is used in Machang,Qiaokou and Puwei Areas.
引文
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[2]钱荣均.关于地震采集空间密度和均匀性分析[J].石油地球物理勘探,2007,42(2):235～243.
[3]Gijs J O V.3-D seismic survey design[A].Geophysical References Series No.12[C].Tulsa:Society of Exploration Geophysi-cists,2002.
[4]Timothy H K,Panos G K,Saudi A,et al.A new era in land seismic:the near surface challenge[A].SEG Houston 2009Interna-tional Exposition and Annual Meeting[C].Houston,2009-10-25～30.
[5]商建瓴,潘文峰,李套山,等.常规与面元细分三维观测系统浅析[J].石油地球物理勘探,1997,32(5):709～716.
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