西沙海槽研究区天然气水合物地球化学勘探及成藏模式研究
摘要
依据ODP204航次1250C站位钻井样品酸解烃数据结果,以及作者在南海西沙海槽研究区天然气水合物地球化学现场勘查中得到的多种烃类指标数据、异常点上微量甲烷碳同位素数值等资料,对海洋水合物地球化学勘探的依据和研究区气态烃异常特征、气体成因、天然气水合物成藏模式等相关问题进行了研究探讨。结果表明:气态烃指标地球化学异常主要分布在工区北部斜坡地带,并与BSR等地震标志及深部断裂关系密切;西沙海槽研究区海底沉积物气态烃甲烷以热解成因为主,但也有混合成因;推测该区天然气水合物为断层渗滤综合成藏模式。研究成果比较合理地解释了BSR分布和海底沉积物甲烷局部异常并非完全一致的原因;评价预测了该区天然气水合物有利勘探目标。成果为该区天然气水合物勘探、天然气水合物成因机制研究和天然气水合物远景预测,提供了地球化学方面的证据。
The paper relies on the acidolysis hydrocarbon results of samples obtained from leg ODP 204,1250C site.We have analysed data from several sites and investigated the patterns of gas hydrate deposits in the area,and the origin of the gas hydrate. The results of this research show that the geochemical anomalies of gaseous hydrocarbon indicatrix are mainly distributed in the southern slope of the area studied. This is closely related to the seismic BSR marker and to the development of the ruptures; and that the cause of formation of submarine sedimentary gaseous hydrocarbon methane in the Xisha ocean trough is mainly ascribed to pyrolysis. We discuss the fault-filtering and comprehensive formation pattern of the gas hydrate, which reasonably explains the inconsistency of the BSR zone with the high value anomaly zone of seabed methane, and predicts some favorable prospecting areas. The results also provide the geochemical evidence for the exploration of the gas hydrate, and shed light on the cause of its formation.
The paper relies on the acidolysis hydrocarbon results of samples obtained from leg ODP 204,1250C site.We have analysed data from several sites and investigated the patterns of gas hydrate deposits in the area,and the origin of the gas hydrate. The results of this research show that the geochemical anomalies of gaseous hydrocarbon indicatrix are mainly distributed in the southern slope of the area studied. This is closely related to the seismic BSR marker and to the development of the ruptures; and that the cause of formation of submarine sedimentary gaseous hydrocarbon methane in the Xisha ocean trough is mainly ascribed to pyrolysis. We discuss the fault-filtering and comprehensive formation pattern of the gas hydrate, which reasonably explains the inconsistency of the BSR zone with the high value anomaly zone of seabed methane, and predicts some favorable prospecting areas. The results also provide the geochemical evidence for the exploration of the gas hydrate, and shed light on the cause of its formation.
引文
[1] JIANG Guosheng,WANG Da,TANG Fenglin, et al.Ex ploitation andExploration ofGasHydrate[M].Wuhan:ChinaUniversity ofGeosciencesPress,2002(inChinese).
[2] ZHANG G X,HUANG Y X,CHEN B Y.Seismology forMarineGasHydrate[M].Beijing:OceanPress,2003( inChinese).
[3] SONG Haibin.GeophysicalResearches onGasHydrates[M].Beijing:OceanPress,2003(inChinese).
[4] SUN Chunyan,NIU Binhua,WEN Pengfei, et al.An inte grated study method for exploration of gas hydrate reservoirsin marine areas[J].ChineseJournal ofGeophysics,2004,47(6):10761085(inChinese).
[5] ZHU Youhai,WU Bihao,LU Zhenquan.The prospectingfor gas hydrate offshore[J].MineralDeposits,2001,122(5):610(inChinese).
[6] WANG Hongyu,SUN Chunyan,HUANG Yongyang,et al.Rapid gaseous hydrocarbon test and prospecting for gas hy drate resources in theXishaTroughSouthChinaSea[J].Ge oscience,2002,16(2):180186(inChinese).
[7] EDWARDS R N.On the resource evaluation of marine gas hydrate deposits using seafloor compliance methods[J].JGeophysicsRes,1997,131:751766.
[8] SUN Chunyan,HUANG Xinwu,ZHANG Mingyu, et al.Gas hydrate and its geophysical recognition studies[J].Geo science,2003,17(2):195201(inChinese).
[9] SUN Chunyan,WANG Hongyu,NIU Binhua.Geochemicalinvestigation of gas hydrate atXishaOceanTrough[J ].EarthScience,2004,29(2):135140(inChinese).
[10] SUN Chunyan,WANG Hongyu,NIU Binhua.Applicationsof on site detection system for the oil and gas resources in o ceans[J].Geology andProspecting,2003,39(6):4952(inChinese).
[11] WANG Weixu,SUN Chunyan,NIU Binhua.Investigationto on site detection system for gaseous hydrocarbon withhigh sensitivity be used to explore gas and oil in sea[J].EarthScience—Journal ofChinaUniversity ofGeosciences,2004,29(2):163168(inChinese).
[12] SONG Haibin,MATSUBAYASHI Osamu,YANG Shengx iong, et al.Geophysical researches on marine gas hydrates(Ⅱ)[J].Progress inGeophysics,2001,16(3):110118(inChinese).
[13] SONG Haibin,MATSUBAYASHI Osamu,WU Nengyou,et al.Geophysical researches on marine gas hydrates(I)[J].Progress inGeophysics,2001,16(2):118126( inChi nese).
[14] SUN Chunyan,HUANG Xinwu,NIU Binhua.Gas hydrateand its geophysical recognition studies[J].Geoscience,2003,17(3):337344(inChinese).
[15] SUN Chunyan,ZHANG Mingyu,NIU Binhua.Micromodelsof gas hydrate and their velocity estimation methods[J ].EarthScienceFrontiers,2003,10(1):191198( inChi nese).
[16] SUN Chunyan,ZHANG Mingyu,NIU Binhua.Modeling ofseismic blanking zone or gas hydrate[J ].EarthScienceFrontiers,2002,10(1):199204(inChinese).
[1] 蒋国盛,王达,汤凤林,等.天然气水合物的勘探与开发[M].武汉:中国地质大学出版社,2002.
[2] 张光学,黄永样,陈邦彦.海域天然气水合物地震学[M].北京:海洋出版社,2003.
[3] 宋海斌.天然气水合物的地球物理研究[M].北京:海洋出版社,2003.
[4] 孙春岩,牛滨华,文鹏飞,等.海上E区天然气水合物地质、地震、地球化学特征综合研究与成藏远景预测[J].地球物理学报,2004,47(6):10761085.
[5] 祝有海,吴必豪,卢振权.中国近海天然气水合物找矿前景[J].矿床地质,2001,122(5):610.
[6] 王宏语,孙春岩,黄永样,等.海上气态烃快速测试与西沙海槽天然气水合物资源勘查[J].现代地质,2002,16(2):180186.
[8] 孙春岩,黄新武,章明昱,等.天然气水合物及其地球物理识别方法的研究进展[J].现代地质,2003,17(2):195201.
[9] 孙春岩,王宏语,牛滨华.西沙海槽天然气水合物地球化学勘探[J].地球科学,2004,29(2):135140.
[10] 孙春岩,王维熙,牛滨华.气态烃快速探测系统在海洋油气资源勘探中的应用[J].地质与勘查,2003,39(6):4952.
[11] 王维熙,孙春岩,牛滨华.海洋油气勘探中高灵敏度气态烃现场探测系统的研制[J].地球科学,2004,29(2):163168.
[12] 宋海斌,松林修,杨胜雄,等.海洋天然气水合物的地球物理研究(II)[J].地球物理学进展,2001,16(3):110118.
[13] 宋海斌,松林修,吴能友,等.海洋天然气水合物的地球物理研究(I)[J].地球物理学进展,2001,16(2):118126.
[14] 孙春岩,黄新武,牛滨华.天然气水合物地震似海底反射现象AVO正演模型研究[J].现代地质,2003,17(3):337344.
[15] 孙春岩,章明昱,牛滨华.天然气水合物微观模式及其速度参数估算方法研究[J].地学前缘,2003,10(1):191198.
[16] 孙春岩,章明昱,牛滨华.天然气水合物地震空白带现象正演模型研究[J].地学前缘,2002,10(1):199204.
[2] ZHANG G X,HUANG Y X,CHEN B Y.Seismology forMarineGasHydrate[M].Beijing:OceanPress,2003( inChinese).
[3] SONG Haibin.GeophysicalResearches onGasHydrates[M].Beijing:OceanPress,2003(inChinese).
[4] SUN Chunyan,NIU Binhua,WEN Pengfei, et al.An inte grated study method for exploration of gas hydrate reservoirsin marine areas[J].ChineseJournal ofGeophysics,2004,47(6):10761085(inChinese).
[5] ZHU Youhai,WU Bihao,LU Zhenquan.The prospectingfor gas hydrate offshore[J].MineralDeposits,2001,122(5):610(inChinese).
[6] WANG Hongyu,SUN Chunyan,HUANG Yongyang,et al.Rapid gaseous hydrocarbon test and prospecting for gas hy drate resources in theXishaTroughSouthChinaSea[J].Ge oscience,2002,16(2):180186(inChinese).
[7] EDWARDS R N.On the resource evaluation of marine gas hydrate deposits using seafloor compliance methods[J].JGeophysicsRes,1997,131:751766.
[8] SUN Chunyan,HUANG Xinwu,ZHANG Mingyu, et al.Gas hydrate and its geophysical recognition studies[J].Geo science,2003,17(2):195201(inChinese).
[9] SUN Chunyan,WANG Hongyu,NIU Binhua.Geochemicalinvestigation of gas hydrate atXishaOceanTrough[J ].EarthScience,2004,29(2):135140(inChinese).
[10] SUN Chunyan,WANG Hongyu,NIU Binhua.Applicationsof on site detection system for the oil and gas resources in o ceans[J].Geology andProspecting,2003,39(6):4952(inChinese).
[11] WANG Weixu,SUN Chunyan,NIU Binhua.Investigationto on site detection system for gaseous hydrocarbon withhigh sensitivity be used to explore gas and oil in sea[J].EarthScience—Journal ofChinaUniversity ofGeosciences,2004,29(2):163168(inChinese).
[12] SONG Haibin,MATSUBAYASHI Osamu,YANG Shengx iong, et al.Geophysical researches on marine gas hydrates(Ⅱ)[J].Progress inGeophysics,2001,16(3):110118(inChinese).
[13] SONG Haibin,MATSUBAYASHI Osamu,WU Nengyou,et al.Geophysical researches on marine gas hydrates(I)[J].Progress inGeophysics,2001,16(2):118126( inChi nese).
[14] SUN Chunyan,HUANG Xinwu,NIU Binhua.Gas hydrateand its geophysical recognition studies[J].Geoscience,2003,17(3):337344(inChinese).
[15] SUN Chunyan,ZHANG Mingyu,NIU Binhua.Micromodelsof gas hydrate and their velocity estimation methods[J ].EarthScienceFrontiers,2003,10(1):191198( inChi nese).
[16] SUN Chunyan,ZHANG Mingyu,NIU Binhua.Modeling ofseismic blanking zone or gas hydrate[J ].EarthScienceFrontiers,2002,10(1):199204(inChinese).
[1] 蒋国盛,王达,汤凤林,等.天然气水合物的勘探与开发[M].武汉:中国地质大学出版社,2002.
[2] 张光学,黄永样,陈邦彦.海域天然气水合物地震学[M].北京:海洋出版社,2003.
[3] 宋海斌.天然气水合物的地球物理研究[M].北京:海洋出版社,2003.
[4] 孙春岩,牛滨华,文鹏飞,等.海上E区天然气水合物地质、地震、地球化学特征综合研究与成藏远景预测[J].地球物理学报,2004,47(6):10761085.
[5] 祝有海,吴必豪,卢振权.中国近海天然气水合物找矿前景[J].矿床地质,2001,122(5):610.
[6] 王宏语,孙春岩,黄永样,等.海上气态烃快速测试与西沙海槽天然气水合物资源勘查[J].现代地质,2002,16(2):180186.
[8] 孙春岩,黄新武,章明昱,等.天然气水合物及其地球物理识别方法的研究进展[J].现代地质,2003,17(2):195201.
[9] 孙春岩,王宏语,牛滨华.西沙海槽天然气水合物地球化学勘探[J].地球科学,2004,29(2):135140.
[10] 孙春岩,王维熙,牛滨华.气态烃快速探测系统在海洋油气资源勘探中的应用[J].地质与勘查,2003,39(6):4952.
[11] 王维熙,孙春岩,牛滨华.海洋油气勘探中高灵敏度气态烃现场探测系统的研制[J].地球科学,2004,29(2):163168.
[12] 宋海斌,松林修,杨胜雄,等.海洋天然气水合物的地球物理研究(II)[J].地球物理学进展,2001,16(3):110118.
[13] 宋海斌,松林修,吴能友,等.海洋天然气水合物的地球物理研究(I)[J].地球物理学进展,2001,16(2):118126.
[14] 孙春岩,黄新武,牛滨华.天然气水合物地震似海底反射现象AVO正演模型研究[J].现代地质,2003,17(3):337344.
[15] 孙春岩,章明昱,牛滨华.天然气水合物微观模式及其速度参数估算方法研究[J].地学前缘,2003,10(1):191198.
[16] 孙春岩,章明昱,牛滨华.天然气水合物地震空白带现象正演模型研究[J].地学前缘,2002,10(1):199204.
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