冲绳海槽天然气水合物综合异常特征及成藏地质条件
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摘要
从冲绳海槽的地质条件来看,该区有利于天然气水合物的稳定存在,从沉积厚度和沉积速率来看,位于冲绳海槽盆地西侧的陆架前缘坳陷最有利于有机质的保存和转化,可以为冲绳海槽水合物的形成提供充足气源。通过对冲绳海槽区域地质条件和地球化学异常的综合分析以及地震特殊处理资料的精细解释,认为冲绳海槽南段很可能更适宜水合物的形成和聚集,因而可能会有很好的远景。
The average water depth more than 1 000 m is advantageous to keep gas hydrate stable in the Okinawa Trough. According to sedimentary thickness and sedimention rate, Lujiaqianyuan depression lying to the west of the Okinawa Trough is the most favorable to preservation and transformation of organic matter, so the depression could provide enough gas for gas hydrate to form. Through integrated consideration of regional geological conditions and geochemical anomalies as well as special processing and interpreting of seismic data, we think that the south part of the Okinawa Trough is probably more suitable to form and accumulate gas hydrate, therefore, the south part probably has good perspective.
The average water depth more than 1 000 m is advantageous to keep gas hydrate stable in the Okinawa Trough. According to sedimentary thickness and sedimention rate, Lujiaqianyuan depression lying to the west of the Okinawa Trough is the most favorable to preservation and transformation of organic matter, so the depression could provide enough gas for gas hydrate to form. Through integrated consideration of regional geological conditions and geochemical anomalies as well as special processing and interpreting of seismic data, we think that the south part of the Okinawa Trough is probably more suitable to form and accumulate gas hydrate, therefore, the south part probably has good perspective.
引文
① 许薇龄 ,柴利根 ,乐俊英 ,等 .东海地质构造特征 .地质矿产部海洋地质综合研究大队 , 1 985.
①曾久岭 ,钱建中 ,谢仁海 .东海地质构造和地壳结构及其演化研究报告 . 2 0 0 1 .
[1] 周祖翼,廖宗廷,金性春,等.冲绳海槽———孤后背景下大陆张裂的最高阶段[J].海洋地质与第四纪地质,2001,21(1):51—55.[ZHOUZu yi,LIAOZong ting,JINXing chun,etal.OkinawaTrough:Thehigheststageofcontinentaltensionriftinginback arcsetting[J].MarineGeology＆QuaternaryGeology,2001,21(1):51—55.]
[2] 王万春.智利三岔点附近气水合物带底部的游离气[C].天然气水合物专辑,1998,9(3 4):61—65.[WANGWan chun.ThefreegasbeneathgashydratezonearoundtheChiletriplepointjunction[C].GasHydratesCollection,1998,9(3 4):61—65.]
[3] 肖国林.冲绳海槽盆地地震相、沉积特征与油气潜能分析[J].海洋地质与第四纪地质,1995,15(增刊):124—131.[XIAOGuo lin.Studyontheseismicfacies,sedimentaryfeaturesandhydrocarbonpotentialinOkinawaTroughBasin[J].MarineGeology＆QuaternaryGeology,1995,15(Suppl.):124—131.]
[4] 李培英,王永吉,刘振夏.冲绳海槽年代地层与沉积速率[J].中国科学(D辑),1999,29(1):50—55.[LIPei ying,WANGYong ji,LIUZhen xia.ChronostratigraphyandsedimentationrateinOkinawaTrough[J].ScienceinChina(SeriesD),1999,29(1):50—55.]
[5] 潘志良,石斯器.冲绳海槽沉积物及其沉积作用的研究[J].海洋地质与第四纪地质,1986,6(1):17—29.[PANZhi liang,SHISi qi.StudyonsedimentsandsedimentationinOkinawaTrough[J].MarineGeology＆QuaternaryGeology,1986,6(1):17—29.]
[6] 李凤业,史玉兰,何丽娟,等.冲绳海槽晚更新世以来沉积速率的变化与沉积环境的关系[J].海洋与湖沼,1999,30(5):540—545.[LIFeng ye,SHIYu lan,HELi juan,etal.RelationshipbetweenthevariationsinsedimentationratesandsedimentationenvironmentsintheOkinawaTroughsincethelatePleistocene[J].OceanologiaetLimnologiaSinica,1999,30(5):540-545.]
[7] 孟宪伟,刘保华,石学法,等.冲绳海槽中段西陆坡下缘天然气水合物存在的可能性分析[J].沉积学报,2000,18(4):629—633.[MENGXian wei,LIUBao hua,SHIXue fa,etal.PossibilityofgashydrateoccurringintheWesternLowerSlopeofMidOkinawaTrough[J].ActaSedimentologicaSinica,2000,18(4):629—633.]
[8] KvenvoldenKA.Comparisionofmarinegashydrateinsedimentsofanactiveandpassivecontinentalmargin[J].MarinePetrol.Geol.,1985,2:65—70
[9] 李学伦,李桂群,林振宏,等.冲绳海槽构造活动的差异性及其非同步发展[J].青岛海洋大学学报,1991,21(4):111—121.[LIXue lun,LIGui qun,LINZhen hong,etal.Thedifferencesoftectonicmovementandtheirnon synchronousdevelopment[J].JournalofOceanUniversityofQingdao,1991,21(4):111—121.]
[10] 龚建明.海底地貌与天然气水合物的关系[J].海洋地质动态,2000,16(11):12—14.[GONGJian ming.Therelationshipofseafloormorphologyandgashydrate[J].MarineGeologyLetters,2000,16(11):12—14.]
[11] KvenvoldenKA,McMenaminMA.Hydrocarbongasesinsedimentoftheshelf,slope,andbasinoftheBeringSea[J].Geochim.CosmochimActa,1980,44:1145—1150.
[12] 卢振权,龚建明,吴必豪,等.东海天然气水合物的地球化学标志与找矿远景[J].海洋地质与第四纪地质,2003,23(3):77—81.[LUZhen quan,GONGJian ming,WUBi hao,etal.GeochemicalperspectiveofgashydrateintheEastChinaSea[J].MarineGeology＆QuaternaryGeology,2003,23(3):77—81.]
[13] 侯增谦,张绮玲.冲绳海槽现代活动热水区CO2 烃类流体:流体包裹体证据[J].中国科学(D辑),1998,28(2):142—148.[HOUZeng qian,ZHANGQi ling.CO2 hydrocarbonfluidsoftheJadehydrothermalfieldintheOkinawaTrough:fluidinclusionevidence[J].ScienceinChina(SeriesD),1998,28(2):142—148.]
[14] 张光学.世界海域水合物地震调查研究综述[J].海洋地质,2001(1):1—18.[ZHANGGuang xue.Summaryonthegashydrateseismicinvestigationandstudyintheworld[J].MarineGeology,2001(1):1—18.]
[15] 杨文达,陆文才.东海陆坡冲绳海槽天然气水合物初探[J].海洋石油,2000(4):23—28.[YANGWen da,LUWen cai.PreliminarystudyongashydrateinthecontinentalslopeandOkinawaTroughintheEastChinaSea[J].OffshoreOil,2000(4):23—28.]
[16] 方银霞,金翔龙,杨树锋.冲绳海槽西北边坡天然气水合物的初步研究[J].海洋学报,2000,22(增刊):49—52.[FANGYin xia,JINXiang long,YANGShu feng,etal.GashydratestudyofthenorthwestslopemarginoftheOkinawaTrough[J].ActaOceanologicaSinica,2000,22(Suppl.):49—52.]
[17] 龚建明,刘守全,许红,等.天然气水合物的聚积与断层的关系[J].地球科学,2001,26(增刊):18—21.[GONGJianming,LIUShou quan,XUHong,etal.Therelationshipbetweenfaultsandtheaccumulationofgash
①曾久岭 ,钱建中 ,谢仁海 .东海地质构造和地壳结构及其演化研究报告 . 2 0 0 1 .
[1] 周祖翼,廖宗廷,金性春,等.冲绳海槽———孤后背景下大陆张裂的最高阶段[J].海洋地质与第四纪地质,2001,21(1):51—55.[ZHOUZu yi,LIAOZong ting,JINXing chun,etal.OkinawaTrough:Thehigheststageofcontinentaltensionriftinginback arcsetting[J].MarineGeology＆QuaternaryGeology,2001,21(1):51—55.]
[2] 王万春.智利三岔点附近气水合物带底部的游离气[C].天然气水合物专辑,1998,9(3 4):61—65.[WANGWan chun.ThefreegasbeneathgashydratezonearoundtheChiletriplepointjunction[C].GasHydratesCollection,1998,9(3 4):61—65.]
[3] 肖国林.冲绳海槽盆地地震相、沉积特征与油气潜能分析[J].海洋地质与第四纪地质,1995,15(增刊):124—131.[XIAOGuo lin.Studyontheseismicfacies,sedimentaryfeaturesandhydrocarbonpotentialinOkinawaTroughBasin[J].MarineGeology＆QuaternaryGeology,1995,15(Suppl.):124—131.]
[4] 李培英,王永吉,刘振夏.冲绳海槽年代地层与沉积速率[J].中国科学(D辑),1999,29(1):50—55.[LIPei ying,WANGYong ji,LIUZhen xia.ChronostratigraphyandsedimentationrateinOkinawaTrough[J].ScienceinChina(SeriesD),1999,29(1):50—55.]
[5] 潘志良,石斯器.冲绳海槽沉积物及其沉积作用的研究[J].海洋地质与第四纪地质,1986,6(1):17—29.[PANZhi liang,SHISi qi.StudyonsedimentsandsedimentationinOkinawaTrough[J].MarineGeology＆QuaternaryGeology,1986,6(1):17—29.]
[6] 李凤业,史玉兰,何丽娟,等.冲绳海槽晚更新世以来沉积速率的变化与沉积环境的关系[J].海洋与湖沼,1999,30(5):540—545.[LIFeng ye,SHIYu lan,HELi juan,etal.RelationshipbetweenthevariationsinsedimentationratesandsedimentationenvironmentsintheOkinawaTroughsincethelatePleistocene[J].OceanologiaetLimnologiaSinica,1999,30(5):540-545.]
[7] 孟宪伟,刘保华,石学法,等.冲绳海槽中段西陆坡下缘天然气水合物存在的可能性分析[J].沉积学报,2000,18(4):629—633.[MENGXian wei,LIUBao hua,SHIXue fa,etal.PossibilityofgashydrateoccurringintheWesternLowerSlopeofMidOkinawaTrough[J].ActaSedimentologicaSinica,2000,18(4):629—633.]
[8] KvenvoldenKA.Comparisionofmarinegashydrateinsedimentsofanactiveandpassivecontinentalmargin[J].MarinePetrol.Geol.,1985,2:65—70
[9] 李学伦,李桂群,林振宏,等.冲绳海槽构造活动的差异性及其非同步发展[J].青岛海洋大学学报,1991,21(4):111—121.[LIXue lun,LIGui qun,LINZhen hong,etal.Thedifferencesoftectonicmovementandtheirnon synchronousdevelopment[J].JournalofOceanUniversityofQingdao,1991,21(4):111—121.]
[10] 龚建明.海底地貌与天然气水合物的关系[J].海洋地质动态,2000,16(11):12—14.[GONGJian ming.Therelationshipofseafloormorphologyandgashydrate[J].MarineGeologyLetters,2000,16(11):12—14.]
[11] KvenvoldenKA,McMenaminMA.Hydrocarbongasesinsedimentoftheshelf,slope,andbasinoftheBeringSea[J].Geochim.CosmochimActa,1980,44:1145—1150.
[12] 卢振权,龚建明,吴必豪,等.东海天然气水合物的地球化学标志与找矿远景[J].海洋地质与第四纪地质,2003,23(3):77—81.[LUZhen quan,GONGJian ming,WUBi hao,etal.GeochemicalperspectiveofgashydrateintheEastChinaSea[J].MarineGeology＆QuaternaryGeology,2003,23(3):77—81.]
[13] 侯增谦,张绮玲.冲绳海槽现代活动热水区CO2 烃类流体:流体包裹体证据[J].中国科学(D辑),1998,28(2):142—148.[HOUZeng qian,ZHANGQi ling.CO2 hydrocarbonfluidsoftheJadehydrothermalfieldintheOkinawaTrough:fluidinclusionevidence[J].ScienceinChina(SeriesD),1998,28(2):142—148.]
[14] 张光学.世界海域水合物地震调查研究综述[J].海洋地质,2001(1):1—18.[ZHANGGuang xue.Summaryonthegashydrateseismicinvestigationandstudyintheworld[J].MarineGeology,2001(1):1—18.]
[15] 杨文达,陆文才.东海陆坡冲绳海槽天然气水合物初探[J].海洋石油,2000(4):23—28.[YANGWen da,LUWen cai.PreliminarystudyongashydrateinthecontinentalslopeandOkinawaTroughintheEastChinaSea[J].OffshoreOil,2000(4):23—28.]
[16] 方银霞,金翔龙,杨树锋.冲绳海槽西北边坡天然气水合物的初步研究[J].海洋学报,2000,22(增刊):49—52.[FANGYin xia,JINXiang long,YANGShu feng,etal.GashydratestudyofthenorthwestslopemarginoftheOkinawaTrough[J].ActaOceanologicaSinica,2000,22(Suppl.):49—52.]
[17] 龚建明,刘守全,许红,等.天然气水合物的聚积与断层的关系[J].地球科学,2001,26(增刊):18—21.[GONGJianming,LIUShou quan,XUHong,etal.Therelationshipbetweenfaultsandtheaccumulationofgash
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