川西坳陷上三叠统须家河组砂体分布预测
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摘要
以高分辨率层序地层学理论和技术方法为指导,通过基准面旋回结构、叠加样式的沉积动力学分析,结合地表露头、钻井岩心、测井、地震资料的综合研究,将上三叠统须家河组划分为4个长期层序、14个中期层序。以地震反射为约束,建立了四川盆地及川西坳陷长、中期基准面旋回层序地层格架。采用层序-岩相古地理编图方法,以长、中期基准面旋回上升、下降相域为单元编制四川盆地、川西坳陷岩相古地理图。在三维地震区内,以短期旋回为单元,建立高分辨率层序地层格架。以长期和中期层序界面、湖泛面为单元建立地震低频模型,以此为约束条件进行地震岩性反演和编制短期旋回小层砂体厚度图和沉积微相图。在此基础上详细讨论了典型小层砂体的纵横向分布与基准面旋回升、降变化和湖进、湖退的关系,预测有利砂岩储层纵、横向分布规律。
Guided by the high-resolution sequence stratigraphy theories and methods,the authors divided the Upper Triassic Xujiahe Formation into 4 long-term sequences and 14 medium-term sequences through sedimentary dynamics analysis of the structures of base level cycle and superimposition patterns and combining comprehensive study of outcrops,coring,logging and seismic data.A sequence stratigraphy framework of the long-term and medium-term cyclic sequences in Sichuan Basin and West Sichuan depression was also constructed under constrain of seismic reflection.Directed by the method of lithofacies paleogeographical mapping,they compiled lithofacies-paleogeographical maps for Sichuan Basin and West Sichuan depression with the elevating and falling fa-cies tracts of long-term and middle-term base level cycle as the mapping units,established high-resolution stratigraphic framework with short-term cycle as unit in 3D seismic survey area.Taking the sequence interface and lake flooding interface of long-term and middle-term cycle as the unit,they also set up low-frequency model and then used it to perform seismic lothological inversion and map sandbodies thickness and sedimentary microfacies of short-term cyclic sequences.Finally,they discussed the relationship between the sandstone distribution and base-level cycle variation and lacustrine ingression and regression,and predicted the vertical and horizontal distributions of potential sand reservoirs.
Guided by the high-resolution sequence stratigraphy theories and methods,the authors divided the Upper Triassic Xujiahe Formation into 4 long-term sequences and 14 medium-term sequences through sedimentary dynamics analysis of the structures of base level cycle and superimposition patterns and combining comprehensive study of outcrops,coring,logging and seismic data.A sequence stratigraphy framework of the long-term and medium-term cyclic sequences in Sichuan Basin and West Sichuan depression was also constructed under constrain of seismic reflection.Directed by the method of lithofacies paleogeographical mapping,they compiled lithofacies-paleogeographical maps for Sichuan Basin and West Sichuan depression with the elevating and falling fa-cies tracts of long-term and middle-term base level cycle as the mapping units,established high-resolution stratigraphic framework with short-term cycle as unit in 3D seismic survey area.Taking the sequence interface and lake flooding interface of long-term and middle-term cycle as the unit,they also set up low-frequency model and then used it to perform seismic lothological inversion and map sandbodies thickness and sedimentary microfacies of short-term cyclic sequences.Finally,they discussed the relationship between the sandstone distribution and base-level cycle variation and lacustrine ingression and regression,and predicted the vertical and horizontal distributions of potential sand reservoirs.
引文
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2郑荣才,尹世民,彭军.基准面旋回结构与叠加样式的沉积动力学分析[J].沉积学报,2000,19(3):369~375
3郑荣才,彭军,吴朝容.陆相盆地基准面旋回的级次划分和研究意义[J].沉积学报,2001,19(2):249~255
4郑荣才,吴朝容.西部凹陷深层沙河街组生储盖组合的层序分析[J].成都理工学院学报,1999,26(4):348~356
5叶泰然,郑荣才.川西坳陷须二段层序地层特征及储层预测[J].天然气工业,2004,24(11):45~48
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7高红灿,郑荣才,叶泰然,等.德阳须家河组四段沉积相特征和砂体分布规律[J].沉积与特提斯地质,2007,27(2):66~73
8叶黎明,陈洪德,胡晓强,等.川西前陆盆地须家河期高分辨率层序格架与古地理演化[J].地层学杂志,2006,30(1):87~95
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10高红灿.四川盆地上三叠统须家河组层序-岩相古地理及砂体分布研究[D].成都:成都理工大学,2007
11高志勇,韩国猛,张丽华.河流相沉积中的准层序———以四川中部须家河组为例[J].石油与天然气地质,2007,28(1):59~68
12邢焕清,姜在兴,王亚青,等.川西前陆盆地上三叠统须家河组二段可容空间转换系统的成因与演化[J].石油与天然气地质,2004,25(4):519~523
13杨克明,叶军,吕正祥.川西坳陷上三叠统须家河组天然气分布及成藏特征[J].石油与天然气地质,2004,25(5):501~505
14何鲤.四川盆地上三叠统地震地层划分对比方案[J].石油与天然气地质,1989,10(4):439~446
15郑荣才,朱如凯,翟文亮,等.川西类前陆盆地晚三叠世须家河期构造演化及层序充填样式[J].中国地质,2008,35(2):246~255
16郑荣才,柯光明,文华国,等.高分辨率层序分析在河流相砂体等时对比中的应用[J].成都理工大学学报,2004,31(6):641~647
17冯增昭.单因素分析多因素综合作图法———定量岩相古地理重建[J].古地理学报,2004,6(1):3~19
18王金琪.安县构造运动[J].石油与天然气地质,1990,11(3):223~234
19王金琪.龙门山印支运动主幕辨析———再论安县构造运动[J].四川地质学报,2003,23(2):65~69
20郑荣才,魏钦廉,叶泰然,等.川西坳陷中段须四段钙屑砂岩储层特征及有利区块预测[J].成都理工大学学报(自然科学版),2007,34(5):489~496
2郑荣才,尹世民,彭军.基准面旋回结构与叠加样式的沉积动力学分析[J].沉积学报,2000,19(3):369~375
3郑荣才,彭军,吴朝容.陆相盆地基准面旋回的级次划分和研究意义[J].沉积学报,2001,19(2):249~255
4郑荣才,吴朝容.西部凹陷深层沙河街组生储盖组合的层序分析[J].成都理工学院学报,1999,26(4):348~356
5叶泰然,郑荣才.川西坳陷须二段层序地层特征及储层预测[J].天然气工业,2004,24(11):45~48
6李绍虎,吴冲龙,王华,等.四川须家河组层序地层格架与天然气成藏的关系[J].石油与天然气地质,1998,19(2):146~151
7高红灿,郑荣才,叶泰然,等.德阳须家河组四段沉积相特征和砂体分布规律[J].沉积与特提斯地质,2007,27(2):66~73
8叶黎明,陈洪德,胡晓强,等.川西前陆盆地须家河期高分辨率层序格架与古地理演化[J].地层学杂志,2006,30(1):87~95
9高红灿,郑荣才,柯光明,等.川东北前陆盆地须家河组层序-岩相古地理特征[J].沉积与特提斯地质,2005,25(3):38~45
10高红灿.四川盆地上三叠统须家河组层序-岩相古地理及砂体分布研究[D].成都:成都理工大学,2007
11高志勇,韩国猛,张丽华.河流相沉积中的准层序———以四川中部须家河组为例[J].石油与天然气地质,2007,28(1):59~68
12邢焕清,姜在兴,王亚青,等.川西前陆盆地上三叠统须家河组二段可容空间转换系统的成因与演化[J].石油与天然气地质,2004,25(4):519~523
13杨克明,叶军,吕正祥.川西坳陷上三叠统须家河组天然气分布及成藏特征[J].石油与天然气地质,2004,25(5):501~505
14何鲤.四川盆地上三叠统地震地层划分对比方案[J].石油与天然气地质,1989,10(4):439~446
15郑荣才,朱如凯,翟文亮,等.川西类前陆盆地晚三叠世须家河期构造演化及层序充填样式[J].中国地质,2008,35(2):246~255
16郑荣才,柯光明,文华国,等.高分辨率层序分析在河流相砂体等时对比中的应用[J].成都理工大学学报,2004,31(6):641~647
17冯增昭.单因素分析多因素综合作图法———定量岩相古地理重建[J].古地理学报,2004,6(1):3~19
18王金琪.安县构造运动[J].石油与天然气地质,1990,11(3):223~234
19王金琪.龙门山印支运动主幕辨析———再论安县构造运动[J].四川地质学报,2003,23(2):65~69
20郑荣才,魏钦廉,叶泰然,等.川西坳陷中段须四段钙屑砂岩储层特征及有利区块预测[J].成都理工大学学报(自然科学版),2007,34(5):489~496
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