HJ断层的地震解释及其意义
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摘要
HJ断层位于冀中拗陷RY凹陷北部,是控制HJ洼陷的东边界正断层,长期以来解释为"一刀切",即纵切基底至新近系。综合研究地震时间剖面、水平切片后发现,HJ断层并不是"一刀切",而是被4条横断层切割为几段。结合储层分布特征,文中提出了一种特殊的油藏模式———断缝带油气藏,太古界花岗片麻岩上部是良好裂缝储层,盖层是覆于太古界花岗片麻岩储层之上的以泥岩为主的古近系砂泥岩段,断面是供油渠道。因此断缝带油气藏具备相应的生、储、盖等成藏条件,可以成为油气勘探的新目标。
HJ normal fault is located in the northern part of RY sag in Jizhong depression controlling the eastern boundary of HJ depression.It was interpreted as an "across the board" fault for long time,which slit to the basement till Neogene.After a joint study of seismic time sections and horizontal slices,we have found that HJ is not an "across the board" fault,but is cut into segments by four transverse faults.Combining reservoir distribution characteristics,we consider it as a special reservoir mode,viz.fractured reservoir.Good fractured reservoir develops in the upper part of the Archean granite gneiss,its cap rock is Paleogene mudstone shale section covered on the Archean granite gneiss,and the fault section is oil supply channels.Therefore,with the corresponding source rock,reservoir,cap rock and other conditions,fractured reservoir can become a new oil and gas exploration target.
HJ normal fault is located in the northern part of RY sag in Jizhong depression controlling the eastern boundary of HJ depression.It was interpreted as an "across the board" fault for long time,which slit to the basement till Neogene.After a joint study of seismic time sections and horizontal slices,we have found that HJ is not an "across the board" fault,but is cut into segments by four transverse faults.Combining reservoir distribution characteristics,we consider it as a special reservoir mode,viz.fractured reservoir.Good fractured reservoir develops in the upper part of the Archean granite gneiss,its cap rock is Paleogene mudstone shale section covered on the Archean granite gneiss,and the fault section is oil supply channels.Therefore,with the corresponding source rock,reservoir,cap rock and other conditions,fractured reservoir can become a new oil and gas exploration target.
引文
[1]刘秋生.东濮凹陷的断层解释.石油地球物理勘探,1989,24(2):187～199Liu Qiu-sheng.The interpretation of faults in Dongpudepression.OGP,1989,24(2):187～199
[2]刘秋生.再谈东濮凹陷的断层解释.石油地球物理勘探,1990,25(6):700～711Liu Qiu-sheng.Afurther exposition of fault interpreta-tion in the Dongpu depression.OGP,1990,25(6):700～711
[3]斯麦霍夫E M[苏].裂缝性油气储集层勘探的基本理论与方法.北京:石油工业出版社,1985
[4]张志让,王兆峰,张梅华,汤金彪.利用三维叠前地震资料预测火成岩储层裂缝分布.石油地球物理勘探,2010,45(1):92～98Zhang Zhi-rang,Wang Zhao-feng,Zhang Mei-hua andTang Jin-biao.Application of 3Dseismic pre-stack datain prediction of fracture distribution for igneous rockreservoir.OGP,2010,45(1):92～98
[2]刘秋生.再谈东濮凹陷的断层解释.石油地球物理勘探,1990,25(6):700～711Liu Qiu-sheng.Afurther exposition of fault interpreta-tion in the Dongpu depression.OGP,1990,25(6):700～711
[3]斯麦霍夫E M[苏].裂缝性油气储集层勘探的基本理论与方法.北京:石油工业出版社,1985
[4]张志让,王兆峰,张梅华,汤金彪.利用三维叠前地震资料预测火成岩储层裂缝分布.石油地球物理勘探,2010,45(1):92～98Zhang Zhi-rang,Wang Zhao-feng,Zhang Mei-hua andTang Jin-biao.Application of 3Dseismic pre-stack datain prediction of fracture distribution for igneous rockreservoir.OGP,2010,45(1):92～98
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