尼日尔三角洲深水区地震模糊区成因及与油气成藏的关系
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摘要
根据尼日尔三角洲深水区地震剖面上模糊区的位置和特征,将地震模糊区分成六类。通过分析地震模糊区的成因机理及其与油气成藏的关系,认为前三类皆为采集处理原因造成,第四类为浅层气泄露造成,第五类为层间小型泥火山爆发所致,第六类为泥火山,海底强振幅下的局部地层模糊,与深部构造、油气有关。在油气田的实际评价过程中,泥火山破坏构造和储层,但由于其规模小、脉动式喷发,自封能力强,对油气资源量的评价影响不大。
The seismic chaotic areas in the deep water regions of Niger Delta have been divided into six types on the basis of the seismic chaotic location and characteristics in seismic profiles.Through analysis about formation mechanism of seismic chaotic and the relationship with HC accumulation,it is believed that the former three kinds seismic chaotic were caused by seismic data acquisition and processing,the fourth type was caused by shallow gas leakage,the fifth type seismic chaotic was caused by the small mud volcano penetrating the strata.The sixth was caused by mud volcano.The local strata ambiguity under sea floor strong amplitude is related with deep structures as well as oil & gas.During the actual evaluation of oil & gas fields,mud volcano has little effect on the size of oil and gas fields because the mud volcano were small in size,and impulse erupted,although they had destroyed the structures and reservoirs.
The seismic chaotic areas in the deep water regions of Niger Delta have been divided into six types on the basis of the seismic chaotic location and characteristics in seismic profiles.Through analysis about formation mechanism of seismic chaotic and the relationship with HC accumulation,it is believed that the former three kinds seismic chaotic were caused by seismic data acquisition and processing,the fourth type was caused by shallow gas leakage,the fifth type seismic chaotic was caused by the small mud volcano penetrating the strata.The sixth was caused by mud volcano.The local strata ambiguity under sea floor strong amplitude is related with deep structures as well as oil & gas.During the actual evaluation of oil & gas fields,mud volcano has little effect on the size of oil and gas fields because the mud volcano were small in size,and impulse erupted,although they had destroyed the structures and reservoirs.
引文
[1]韩文明,邓运华,于水,等.尼日尔三角洲深水勘探研究面临的挑战及其对策[J].地质学报,2012,86(4):671-678.
[2]Graue K.Mud Volcanoes in Deepwater Nigeria[J].Marine and PetroleumnGeology,2000,17(8):959-974.
[3]Guliyev IS.A review of mud volcanism[M].Azerbaijan Academy of Sciences,Institute of Geology,Azerbaijan,65pp, 1992.
[4]Linda S Smith-Rouch.Oligocene-Miocene Maykop/Diatom Total Petroleum System of the South Caspian Basin Province, Azerbaijian,Iran,and Turkmenistan[M].U.S.Geological Survey Bulletin 2201-I,2006.
[2]Graue K.Mud Volcanoes in Deepwater Nigeria[J].Marine and PetroleumnGeology,2000,17(8):959-974.
[3]Guliyev IS.A review of mud volcanism[M].Azerbaijan Academy of Sciences,Institute of Geology,Azerbaijan,65pp, 1992.
[4]Linda S Smith-Rouch.Oligocene-Miocene Maykop/Diatom Total Petroleum System of the South Caspian Basin Province, Azerbaijian,Iran,and Turkmenistan[M].U.S.Geological Survey Bulletin 2201-I,2006.
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