丽水—椒江凹陷月桂峰组地震—沉积响应及烃源岩特征
|
摘要
丽水—椒江凹陷月桂峰组属古新世早期沉积,为凹陷主力烃源岩层。依据地震反射波的振幅、连续性、内部结构和外部形态等特征,在月桂峰组识别出6种主要的地震相类型:中高频弱振幅连续平行—亚平行席状相、低频强振幅较连续亚平行席状相、变振幅连续—较连续前积相、中振幅较连续—断续楔状相、中强振幅杂乱相和中弱振幅较连续充填相。然后再结合研究区钻井资料及区域构造背景,进行地震相—沉积相分析。结果表明:研究区月桂峰组是断陷型湖泊沉积环境,主要发育扇三角洲、水下扇、三角洲、湖泊等多种沉积相类型。进而结合钻井岩样分析,得出月桂峰组湖相泥岩属中—好烃源岩,主要发育于丽东次凹、丽西次凹中北部和椒江凹陷的中央洼陷带,有效烃源岩厚度可达1 000余米,面积总共为4 974.8km2。优选了处于源岩中心或邻近源岩中心的凹中隆及斜坡构造带作为下一步勘探工作的重点目标区域,为今后的勘探工作提出了有益的建议。
The Yueguifeng Formation as a main source rock in the Lishui-Jiaojiang sag is formed in the early Paleocene.Based on features of amplitude,continuity and internal structure of seismic reflection wave as well as its external shape,six seismic facies types for the Yueguifeng Formation in Lishui-Jiaojiang sag are identified as follows:Medium-high frequency weak amplitude high continuity subparallel or parallel sheet facies,weak frequency high amplitude medium continuity subparallel sheet facies,variable amplitude medium-high continuity progradation facies,medium amplitude weak-medium continuity wedge facies,medium-high amplitude disorderly facies,and weak-medium amplitude medium continuity filling facies.According to areal distribution,drilling and regional structural background,seismic facies is transferred into sedimentary facies by seismic interpretation.The results show that the Yueguifeng Formation was deposited in the rift lacustrine environment,associated with fan delta,subsea apron,delta and lacustrine faicies.In combination with core sample measurement,we consider that the lacustrine mudstone of Yueguifeng Formation is good and general quality source rock,mainly distributed in the central area of Lishui east subprime sag,north-central of Lishui east subprime sag and Jiaojiang sag,with thickness more than 1 000m and area about 4 974.8km2.We identity some favorable areas in the uplift and slope structural belt nearby the source rock center as the important target regions in the further.Some beneficial advices are proposed for further exploration.
The Yueguifeng Formation as a main source rock in the Lishui-Jiaojiang sag is formed in the early Paleocene.Based on features of amplitude,continuity and internal structure of seismic reflection wave as well as its external shape,six seismic facies types for the Yueguifeng Formation in Lishui-Jiaojiang sag are identified as follows:Medium-high frequency weak amplitude high continuity subparallel or parallel sheet facies,weak frequency high amplitude medium continuity subparallel sheet facies,variable amplitude medium-high continuity progradation facies,medium amplitude weak-medium continuity wedge facies,medium-high amplitude disorderly facies,and weak-medium amplitude medium continuity filling facies.According to areal distribution,drilling and regional structural background,seismic facies is transferred into sedimentary facies by seismic interpretation.The results show that the Yueguifeng Formation was deposited in the rift lacustrine environment,associated with fan delta,subsea apron,delta and lacustrine faicies.In combination with core sample measurement,we consider that the lacustrine mudstone of Yueguifeng Formation is good and general quality source rock,mainly distributed in the central area of Lishui east subprime sag,north-central of Lishui east subprime sag and Jiaojiang sag,with thickness more than 1 000m and area about 4 974.8km2.We identity some favorable areas in the uplift and slope structural belt nearby the source rock center as the important target regions in the further.Some beneficial advices are proposed for further exploration.
引文
[1]Jiang Liang,Li Baohua,Zhong Shilan,et al.Yueguifeng For-mation,a new stratigraphic uint in the Taipei depression ofthe continental shelf,the East China Sea[J].Journal of Stra-tigraphy,2003,27(3):210-215.[姜亮,李保华,钟石兰,等.东海陆架盆地台北坳陷新地层单位——月桂峰组[J].地层学杂志,2003,27(3):210-215.]
[2]Chen Zhiyong.Analysis of hydrocarbon potential and selec-tion of exploration prospect of Lishui and Jiaojiang sags[J].China Offshore Oil and Gas:Geology,1997,11(6):451-458.[陈志勇.丽水、椒江凹陷油气潜力分析和勘探突破口的选择[J].中国海上油气:地质,1997,11(6):451-458.]
[3]Zhang Shengli,Xia Bin.Characters of tectonic evolution of theLishui-Jiaojiang sag and oil accumulation[J].Oil&Gas Geol-ogy,2005,16(3):324-328.[张胜利,夏斌.丽水—椒江凹陷构造演化特征与油气聚集[J].天然气地球科学,2005,16(3):324-328.]
[4]Ge Heping,Chen Zhiyong,Fang Laifu,et al.A discussion onhydrocarbon accumulation periods in Lishui sag,East ChinaSea basin[J].China Offshore Oil and Gas:Geology,2003,17(1):44-50.[葛和平,陈志勇,方来富,等.丽水凹陷油气成藏期次探讨[J].中国海上油气:地质,2003,17(1):44-50.]
[5]Jia Juntao,Zheng Hongbo.Formation and tectonic evolutionof the East China Sea[J].Marine Geology Letters,2010,26(1):1-5.[贾军涛,郑洪波.东海的形成与构造演化[J].海洋地质动态,2010,26(1):1-5.]
[6]Zheng Qiugen,Zhou Zuyi,Cai Liguo,et al.Meso-Cenozoic tec-tonic setting and evolution of East China Sea shelf basin[J].Oil and Gas Geology,2005,26(2):197-201.[郑求根,周祖翼,蔡立国,等.东海陆架盆地中新生代构造背景及演化[J].石油与天然气地质,2005,26(2):197-201.]
[7]Jiang Liang,Li Baohua,Zhong Shilan,et al.Biostratigraphyand paleoenvironment of the Yueguifeng Formation in theTaipei depression of the continental shelf basin of the EastChina Sea[J].Marine Geology and Quaternary Geology,2004,24(1):37-42.[姜亮,李保华,钟石兰,等.东海陆架盆地台北坳陷月桂峰组生物地层及古环境[J].海洋地质与第四纪地质,2004,24(1):37-42.]
[8]Vails C K.Sequence Stratigraphic Principle:Integrated Analy-sis of Sea Level Changes[M].Beijing:Petroleum IndustryPress,1993.[韦尔斯C K.层序地层学原理:海平面变化综合分析[M].北京:石油工业出版社,1993.]
[9]Huang Feng,Li Zhirong,Liao Ling,et al.Sedimentary faciesanalysis using seismic data[J].Computing Techniques for Ge-ophysical and Geochemical Exploration,2003,25(3):197-201.[黄锋,李志荣,廖玲,等.利用地震资料进行沉积相分析[J].物探化探计算技术,2003,25(3):197-201.]
[10]Friedman G M,Saunders J E.Principles of Sedimentology[M].Beijing:Science Press,1987.[弗里德曼G M,桑德斯JE.沉积学原理[M].北京:科学出版社,1987.]
[11]Feng Zengzhao,Zhao Chenglin.Sedimentary Petrology[M].Beijing:Petroleum Industry Press,1993.[冯增昭,赵澄林.沉积岩石学[M].北京:石油工业出版社,1993.]
[12]Liu Dianhe,Li Fengjie,Zheng Rongcai,et al.Sedimentary fa-cies feature of Paleogene lower Ganchaigou Formation in thewest segment,north edge of Qaidam basin[J].Oil&Gas Ge-ology,2009,20(6):847-853.[刘殿鹤,李凤杰,郑荣才,等.柴北缘西段古近系下干柴沟组沉积相特征分析[J].天然气地球科学,2009,20(6):847-853.]
[13]Ji Lidan,Gu Jiayu,Zhao Liang,et al.Sedimentary facies andreservoir properties of the Shushanhe Formation in easternWushi sag,Xinjiang[J].Oil&Gas Geology,2009,20(6):884-889.[季丽丹,顾家裕,赵亮,等.新疆乌什凹陷东部舒善河组沉积相及其储集性能研究[J].天然气地球科学,2009,20(6):884-889.]
[14]Jin Jiuqiang,Song Jianguo.Control of plate tectonics over evo-lution of petroliferous basins and characteristic of oil and gasdistribution in China[J].Oil&Gas Geology,2005,26(1):2-8.[靳久强,宋建国.中国板块构造对含油气盆地演化和油气分布特征的控制[J].石油与天然气地质,2005,26(1):2-8.]
[15]Jia Chengye,Xia Bin,Wang He,et al.Characteristic of tecton-ic evolution and petroleum geology in Lishui sag,East ChinaSea basin[J].Natural Gas Geoscience,2006,17(3):397-401.[贾成业,夏斌,王核,等.东海陆架盆地丽水凹陷构造演化及油气地质分析[J].天然气地球科学,2006,17(3):397-401.]
[16]Chen Zhiyong,Wu Peikang,Wu Zhixuan.Petroleum geologyand exploration potential of Lishui sag[J].China Offshore Oiland Gas:Geology,2000,14(6):384-391.[陈志勇,吴培康,吴志轩.丽水凹陷石油地质特征及勘探前景[J].中国海上油气:地质,2000,14(6):384-391.]
[2]Chen Zhiyong.Analysis of hydrocarbon potential and selec-tion of exploration prospect of Lishui and Jiaojiang sags[J].China Offshore Oil and Gas:Geology,1997,11(6):451-458.[陈志勇.丽水、椒江凹陷油气潜力分析和勘探突破口的选择[J].中国海上油气:地质,1997,11(6):451-458.]
[3]Zhang Shengli,Xia Bin.Characters of tectonic evolution of theLishui-Jiaojiang sag and oil accumulation[J].Oil&Gas Geol-ogy,2005,16(3):324-328.[张胜利,夏斌.丽水—椒江凹陷构造演化特征与油气聚集[J].天然气地球科学,2005,16(3):324-328.]
[4]Ge Heping,Chen Zhiyong,Fang Laifu,et al.A discussion onhydrocarbon accumulation periods in Lishui sag,East ChinaSea basin[J].China Offshore Oil and Gas:Geology,2003,17(1):44-50.[葛和平,陈志勇,方来富,等.丽水凹陷油气成藏期次探讨[J].中国海上油气:地质,2003,17(1):44-50.]
[5]Jia Juntao,Zheng Hongbo.Formation and tectonic evolutionof the East China Sea[J].Marine Geology Letters,2010,26(1):1-5.[贾军涛,郑洪波.东海的形成与构造演化[J].海洋地质动态,2010,26(1):1-5.]
[6]Zheng Qiugen,Zhou Zuyi,Cai Liguo,et al.Meso-Cenozoic tec-tonic setting and evolution of East China Sea shelf basin[J].Oil and Gas Geology,2005,26(2):197-201.[郑求根,周祖翼,蔡立国,等.东海陆架盆地中新生代构造背景及演化[J].石油与天然气地质,2005,26(2):197-201.]
[7]Jiang Liang,Li Baohua,Zhong Shilan,et al.Biostratigraphyand paleoenvironment of the Yueguifeng Formation in theTaipei depression of the continental shelf basin of the EastChina Sea[J].Marine Geology and Quaternary Geology,2004,24(1):37-42.[姜亮,李保华,钟石兰,等.东海陆架盆地台北坳陷月桂峰组生物地层及古环境[J].海洋地质与第四纪地质,2004,24(1):37-42.]
[8]Vails C K.Sequence Stratigraphic Principle:Integrated Analy-sis of Sea Level Changes[M].Beijing:Petroleum IndustryPress,1993.[韦尔斯C K.层序地层学原理:海平面变化综合分析[M].北京:石油工业出版社,1993.]
[9]Huang Feng,Li Zhirong,Liao Ling,et al.Sedimentary faciesanalysis using seismic data[J].Computing Techniques for Ge-ophysical and Geochemical Exploration,2003,25(3):197-201.[黄锋,李志荣,廖玲,等.利用地震资料进行沉积相分析[J].物探化探计算技术,2003,25(3):197-201.]
[10]Friedman G M,Saunders J E.Principles of Sedimentology[M].Beijing:Science Press,1987.[弗里德曼G M,桑德斯JE.沉积学原理[M].北京:科学出版社,1987.]
[11]Feng Zengzhao,Zhao Chenglin.Sedimentary Petrology[M].Beijing:Petroleum Industry Press,1993.[冯增昭,赵澄林.沉积岩石学[M].北京:石油工业出版社,1993.]
[12]Liu Dianhe,Li Fengjie,Zheng Rongcai,et al.Sedimentary fa-cies feature of Paleogene lower Ganchaigou Formation in thewest segment,north edge of Qaidam basin[J].Oil&Gas Ge-ology,2009,20(6):847-853.[刘殿鹤,李凤杰,郑荣才,等.柴北缘西段古近系下干柴沟组沉积相特征分析[J].天然气地球科学,2009,20(6):847-853.]
[13]Ji Lidan,Gu Jiayu,Zhao Liang,et al.Sedimentary facies andreservoir properties of the Shushanhe Formation in easternWushi sag,Xinjiang[J].Oil&Gas Geology,2009,20(6):884-889.[季丽丹,顾家裕,赵亮,等.新疆乌什凹陷东部舒善河组沉积相及其储集性能研究[J].天然气地球科学,2009,20(6):884-889.]
[14]Jin Jiuqiang,Song Jianguo.Control of plate tectonics over evo-lution of petroliferous basins and characteristic of oil and gasdistribution in China[J].Oil&Gas Geology,2005,26(1):2-8.[靳久强,宋建国.中国板块构造对含油气盆地演化和油气分布特征的控制[J].石油与天然气地质,2005,26(1):2-8.]
[15]Jia Chengye,Xia Bin,Wang He,et al.Characteristic of tecton-ic evolution and petroleum geology in Lishui sag,East ChinaSea basin[J].Natural Gas Geoscience,2006,17(3):397-401.[贾成业,夏斌,王核,等.东海陆架盆地丽水凹陷构造演化及油气地质分析[J].天然气地球科学,2006,17(3):397-401.]
[16]Chen Zhiyong,Wu Peikang,Wu Zhixuan.Petroleum geologyand exploration potential of Lishui sag[J].China Offshore Oiland Gas:Geology,2000,14(6):384-391.[陈志勇,吴培康,吴志轩.丽水凹陷石油地质特征及勘探前景[J].中国海上油气:地质,2000,14(6):384-391.]
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心