川中地区须五段—须六段浅水三角洲沉积特征与模式
|
摘要
针对川中地区须五段—须六段,在大量露头观察、岩心描述基础上,结合测井和地震分析,认为研究区为典型的浅水三角洲。根据煤岩产状、砂岩中植物颈干与碎片、河道底部冲刷程度、滞留沉积类型、层理类型等特征将浅水三角洲划分为上三角洲平原、下三角洲平原、三角洲前缘及前三角洲4种亚相。并在此基础上,建立了两种浅水三角洲模式:一种为以须五段为代表的低物源供给浅水三角洲沉积模式;另一种为以须六段为代表的高物源供给浅水辫状河三角洲沉积模式。低物源供给型的下三角洲平原发育的煤是良好烃源岩,高物源供给型的下三角洲平原分流河道及决口沉积为优质储层发育相带,两者匹配,构成良好的生储组合,是岩性油气藏勘探的重点区块。
The 5th-6th interval,of the upper part of Xujiahe Formation,in Central Sichuan Basin,is the main studying stratum in this paper.Based on many outcrops,cores,logging and seismic data,Xujiahe Formation is one typical kind of shallow-water delta.According to the characteristics of coal rocks,plant stems,leaves,channel scouring,lags,and the stratification,shallow-water delta could be divided into four kinds of subfacies.They are upper delta plain,lower delta plain,delta front and prodelta.Two types of models for shallow-water deltas are summarized in this paper.The first is of low supply,i.e.the 5th interval.The second is of high supply,i.e.the 6th interval.Coal rocks on the lower delta plain of the delta with low supply are good source rocks.Sandstones of distributary channel and crevasse splay on the lower delta plain of delta with high supply are the favorite reservoirs.Favorable generating-reserving assemblages could be found on the lower delta plain of shallow-water delta,which is the major exploration zone for lithological reservoirs.
The 5th-6th interval,of the upper part of Xujiahe Formation,in Central Sichuan Basin,is the main studying stratum in this paper.Based on many outcrops,cores,logging and seismic data,Xujiahe Formation is one typical kind of shallow-water delta.According to the characteristics of coal rocks,plant stems,leaves,channel scouring,lags,and the stratification,shallow-water delta could be divided into four kinds of subfacies.They are upper delta plain,lower delta plain,delta front and prodelta.Two types of models for shallow-water deltas are summarized in this paper.The first is of low supply,i.e.the 5th interval.The second is of high supply,i.e.the 6th interval.Coal rocks on the lower delta plain of the delta with low supply are good source rocks.Sandstones of distributary channel and crevasse splay on the lower delta plain of delta with high supply are the favorite reservoirs.Favorable generating-reserving assemblages could be found on the lower delta plain of shallow-water delta,which is the major exploration zone for lithological reservoirs.
引文
[1]Postma G.An analysis of the variation in delta architecture[J].Terra Nova,1990,2(2):124-130.
[2]Donaldson A C.Pennsylvanian sedimentation of central Appala-chians[J].Special Papers of the Geological Society of America,1974,148(5):47-48.
[3]Coleman J M,Prior D B.Deltaic environments of deposition[M]//Scholle P A,Sprarlng D.Sandstone Depositional Envi-ronments.AAPG Memoir.Tulsa,Okla:American Association ofPetroleum Geologists,1982,31:139-178.
[4]邹才能,赵文智,张兴阳,等.大型敞流坳陷湖盆浅水三角洲与湖盆中心砂体的形成与分布[J].地质学报,2008,82(6):813-825.
[5]龙国清,郑俊峰,黄郑,等.宝浪油田侏罗系三工河组浅水辫状河三角洲沉积模式研究[J].河南石油,2002,16(2):4-6.
[6]王家豪,姚光庆,赵彦超.浅水辫状河三角洲发育区短期基准面旋回划分及储层宏观特征分析[J].沉积学报,2004,22(1):87-94.
[7]谢辉.浅水粗粒辫状河三角洲沉积微相特征与油气产能的关系——以焉耆盆地宝浪油田为例[J].地球科学与环境学报,2004,26(4):37-40.
[8]加东辉,吴小红,赵利昌,等.渤中25-1南油田浅水三角洲各微相粒度特征分析[J].沉积与特提斯地质,2005,25(4):87-94.
[9]楼章华,袁笛,金爱民.松辽盆地北部浅水三角洲前缘砂体类型特征与沉积动力学过程分析[J].浙江大学学报,2004,31(2):211-215.
[10]郭英海,刘焕杰,李壮福,等.晋中北山西组浅水三角洲沉积特征及聚煤作用[J].中国矿业大学学报,1995,24(1):64-70.
[11]李增学,魏久传,李守春.鲁西河控浅水三角洲沉积体系及煤聚集规律[J].煤田地质与勘探,1995,23(2):7-12.
[12]薛庆远.山东腾南矿区山西组浅水三角洲的沉积构成和聚煤特征[J].中国矿业大学学报,1995,24(2):43-51.
[13]何义中,陈洪德,张锦泉.鄂尔多斯盆地中部石炭—二叠系两类三角洲沉积机理探讨[J].石油与天然气地质,2001,22(1):68-71.
[14]郑超,李宝芳.秦岭北麓晚二叠世平顶山段辫状河—辫状三角洲沉积体系及其构造涵义[J].现代地质,2003,17(4):415-420.
[15]张金亮,王宝清.四川盆地中西部上三叠统沉积相[J].西安石油学院学报,2000,15(2):1-6.
[16]侯方浩,蒋裕强,方少仙,等.四川盆地上三叠统香溪群组二段和四段砂岩沉积模式[J].石油学报,2005,26(2):30-37.
[17]童崇光.四川盆地构造演化与油气聚集[M].北京:地质出版社,1992:20-21.
[2]Donaldson A C.Pennsylvanian sedimentation of central Appala-chians[J].Special Papers of the Geological Society of America,1974,148(5):47-48.
[3]Coleman J M,Prior D B.Deltaic environments of deposition[M]//Scholle P A,Sprarlng D.Sandstone Depositional Envi-ronments.AAPG Memoir.Tulsa,Okla:American Association ofPetroleum Geologists,1982,31:139-178.
[4]邹才能,赵文智,张兴阳,等.大型敞流坳陷湖盆浅水三角洲与湖盆中心砂体的形成与分布[J].地质学报,2008,82(6):813-825.
[5]龙国清,郑俊峰,黄郑,等.宝浪油田侏罗系三工河组浅水辫状河三角洲沉积模式研究[J].河南石油,2002,16(2):4-6.
[6]王家豪,姚光庆,赵彦超.浅水辫状河三角洲发育区短期基准面旋回划分及储层宏观特征分析[J].沉积学报,2004,22(1):87-94.
[7]谢辉.浅水粗粒辫状河三角洲沉积微相特征与油气产能的关系——以焉耆盆地宝浪油田为例[J].地球科学与环境学报,2004,26(4):37-40.
[8]加东辉,吴小红,赵利昌,等.渤中25-1南油田浅水三角洲各微相粒度特征分析[J].沉积与特提斯地质,2005,25(4):87-94.
[9]楼章华,袁笛,金爱民.松辽盆地北部浅水三角洲前缘砂体类型特征与沉积动力学过程分析[J].浙江大学学报,2004,31(2):211-215.
[10]郭英海,刘焕杰,李壮福,等.晋中北山西组浅水三角洲沉积特征及聚煤作用[J].中国矿业大学学报,1995,24(1):64-70.
[11]李增学,魏久传,李守春.鲁西河控浅水三角洲沉积体系及煤聚集规律[J].煤田地质与勘探,1995,23(2):7-12.
[12]薛庆远.山东腾南矿区山西组浅水三角洲的沉积构成和聚煤特征[J].中国矿业大学学报,1995,24(2):43-51.
[13]何义中,陈洪德,张锦泉.鄂尔多斯盆地中部石炭—二叠系两类三角洲沉积机理探讨[J].石油与天然气地质,2001,22(1):68-71.
[14]郑超,李宝芳.秦岭北麓晚二叠世平顶山段辫状河—辫状三角洲沉积体系及其构造涵义[J].现代地质,2003,17(4):415-420.
[15]张金亮,王宝清.四川盆地中西部上三叠统沉积相[J].西安石油学院学报,2000,15(2):1-6.
[16]侯方浩,蒋裕强,方少仙,等.四川盆地上三叠统香溪群组二段和四段砂岩沉积模式[J].石油学报,2005,26(2):30-37.
[17]童崇光.四川盆地构造演化与油气聚集[M].北京:地质出版社,1992:20-21.
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