南海北部潮汕坳陷海区海底地震仪调查实验
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摘要
潮汕坳陷被认为是一个具有良好油气前景的中生代残留沉积坳陷,其中生代地层也被新近的钻井证实。为研究其盆地深部构造,"十五"863课题跨越该区进行了深地质调查。调查采用5台国产海底地震仪记录深部地震资料。处理结果显示本次调查清楚地记录到了来自地壳内部和Moho面的震相,这是国产海底地震仪在南海地区的首次成功实践。海底地震仪记录揭示沿测线的地壳在南海形成过程中减薄程度较低,中生代地层速度较高,代表致密的岩石,这些因素可能不利于油气的储集,需要在勘探中避开。
Chaoshan Sag has been regarded as a prospective relic Mesozoic sedimentary sag in the South China Sea.Recent drilling confirms the existence of the Mesozoic group.In one field experiment,five sets of ocean-bottom seismometers assembled by Chinese scientists have been deployed successfully to explore the deep geological structure of the basin.The ocean-bottom seismic data show clear phases from inner crust and Moho discontinuity.The data also reveal that the crust over the Chaoshan Sag thins less compared with the neighboring areas in the northern South China Sea,and the seismic velocity of the Mesozoic formation increases considerably,which implies high consolidation of sedimentary rocks,not prone to petroleum accumulation.Such case should be avoided in future exploration of petroleum.
Chaoshan Sag has been regarded as a prospective relic Mesozoic sedimentary sag in the South China Sea.Recent drilling confirms the existence of the Mesozoic group.In one field experiment,five sets of ocean-bottom seismometers assembled by Chinese scientists have been deployed successfully to explore the deep geological structure of the basin.The ocean-bottom seismic data show clear phases from inner crust and Moho discontinuity.The data also reveal that the crust over the Chaoshan Sag thins less compared with the neighboring areas in the northern South China Sea,and the seismic velocity of the Mesozoic formation increases considerably,which implies high consolidation of sedimentary rocks,not prone to petroleum accumulation.Such case should be avoided in future exploration of petroleum.
引文
[1]TAYLOR B,HAYES D E.The tectonic evolution of the South China Sea Basin[J]//HAYES D E.The tectonic and geologic evolution of Southeast Asian Seas and Islands.Geophys Monogr Ser,1980,23.AGU,Washington D C:89—104.
[2]KUDRASS H R,WIEDICKE M,CEPECK P,et al.Pre-Quaternary rocks dredged from the South China Sea(Reed Bankarea)and Sulu Sea,during Sonne Cruises in 1982—83 andtheir significance for the plate tectonic reconstructions[J].Marineand Petroleum Geology,1986,3:19—30.
[3]曹昌桂,翁荣南,杨肇穆,等.台南盆地中生界油气潜能研究与应用[J].Mining&Metalluge,1992,36(1):32—45.
[4]苏乃容,曾麟,李平鲁.珠江口盆地东部中生代凹陷地质特征[J].中国海上油气:地质,1995,9(4):228—236.
[5]郝沪军,林鹤鸣,杨梦雄.潮汕坳陷中生界—油气勘探的新领域[J].中国海上油气:地质,2001,15(3):157—163.
[6]陈隽,郝沪军,林鹤鸣.潮汕坳陷地震资料的改善及中生界构造的新发现[J].中国海上油气:地质,2002,l6(4):271—278.
[7]杨少坤,林鹤鸣,郝沪军.珠江口盆地东部中生界海相油气勘探前景[J].石油学报,2002,23(5):28—33.
[8]HAO HUJUN,ZHANG XIANGTAO,YOU HONGQING,et al.Characteristics and Hydrocarbon Potential of Mesozoic Strata in Eastern Pearl River Mouth Basin,Northern South China Sea[J].Journal of Earth Science,2009,20(1):117—123.
[9]王嘹亮,程日辉,李飞,等.南海北部陆缘中生代沉积层序、对比和油气地质意义[J].吉林大学学报:地球科学版,2009,39(2):176—182.
[10]王嘹亮,张志荣,阎贫等.潮汕坳陷地壳结构探测初步成果[J].南海地质研究,2004,15:62—67.
[11]游庆瑜,刘福田,冉崇荣.MCI微功耗宽频带数字地震仪[J].地球物理学报,2003,46(3):347—354.
[12]CERVENY V,MOLOTKOV I A,PSENCIK I.Ray method inseismology[M].Prague:Charles University Press,1997.
[13]ZELT C A,SMITH R B.Seismic traveltime inversion for 2-Dcrustal velocity structure[J].Geophysical Journal International,1992,108:16—34.
[14]阎贫.海底地震仪记录中的横波[J].石油物探,2000,39(2):117—123.
[15]孟令顺,杜晓娟,刘万崧,等.中国南海北部潮汕坳陷NHC-1测线及邻区重磁场特征与地壳结构[J].吉林大学学报:地球科学版,2006,36(5):851—855.
[16]邵磊,尤洪庆,郝沪军,等.南海东北部中生界岩石学特征及沉积环境[J].地质评论,2007,53(2):164—169.
[17]吴国瑄,王汝建,郝沪军,等.南海北部海相中生界发育的微体化石证据[J].海洋地质与第四纪地质,2007,27(1):79—85.
[2]KUDRASS H R,WIEDICKE M,CEPECK P,et al.Pre-Quaternary rocks dredged from the South China Sea(Reed Bankarea)and Sulu Sea,during Sonne Cruises in 1982—83 andtheir significance for the plate tectonic reconstructions[J].Marineand Petroleum Geology,1986,3:19—30.
[3]曹昌桂,翁荣南,杨肇穆,等.台南盆地中生界油气潜能研究与应用[J].Mining&Metalluge,1992,36(1):32—45.
[4]苏乃容,曾麟,李平鲁.珠江口盆地东部中生代凹陷地质特征[J].中国海上油气:地质,1995,9(4):228—236.
[5]郝沪军,林鹤鸣,杨梦雄.潮汕坳陷中生界—油气勘探的新领域[J].中国海上油气:地质,2001,15(3):157—163.
[6]陈隽,郝沪军,林鹤鸣.潮汕坳陷地震资料的改善及中生界构造的新发现[J].中国海上油气:地质,2002,l6(4):271—278.
[7]杨少坤,林鹤鸣,郝沪军.珠江口盆地东部中生界海相油气勘探前景[J].石油学报,2002,23(5):28—33.
[8]HAO HUJUN,ZHANG XIANGTAO,YOU HONGQING,et al.Characteristics and Hydrocarbon Potential of Mesozoic Strata in Eastern Pearl River Mouth Basin,Northern South China Sea[J].Journal of Earth Science,2009,20(1):117—123.
[9]王嘹亮,程日辉,李飞,等.南海北部陆缘中生代沉积层序、对比和油气地质意义[J].吉林大学学报:地球科学版,2009,39(2):176—182.
[10]王嘹亮,张志荣,阎贫等.潮汕坳陷地壳结构探测初步成果[J].南海地质研究,2004,15:62—67.
[11]游庆瑜,刘福田,冉崇荣.MCI微功耗宽频带数字地震仪[J].地球物理学报,2003,46(3):347—354.
[12]CERVENY V,MOLOTKOV I A,PSENCIK I.Ray method inseismology[M].Prague:Charles University Press,1997.
[13]ZELT C A,SMITH R B.Seismic traveltime inversion for 2-Dcrustal velocity structure[J].Geophysical Journal International,1992,108:16—34.
[14]阎贫.海底地震仪记录中的横波[J].石油物探,2000,39(2):117—123.
[15]孟令顺,杜晓娟,刘万崧,等.中国南海北部潮汕坳陷NHC-1测线及邻区重磁场特征与地壳结构[J].吉林大学学报:地球科学版,2006,36(5):851—855.
[16]邵磊,尤洪庆,郝沪军,等.南海东北部中生界岩石学特征及沉积环境[J].地质评论,2007,53(2):164—169.
[17]吴国瑄,王汝建,郝沪军,等.南海北部海相中生界发育的微体化石证据[J].海洋地质与第四纪地质,2007,27(1):79—85.
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