塔里木盆地塔中孤立台地北缘上奥陶统良里塔格组精细沉积建模
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摘要
通过对大量露头和岩心资料的分析,塔中孤立台地北缘上奥陶统良里塔格组识别出滩、障积礁、灰泥丘、藻席、潮下低能带五种沉积微相。并按照沉积能量由高到低的顺序,建立起高频沉积组合,它们分别是:滩—礁组合、滩—礁—丘组合、滩—丘组合、粒屑滩组合、滩—席组合、丘—席组合、藻席组合、低能带—藻席组合,进而在层序格架内分析了这八种高频沉积组合在时空上的演化规律。在此基础上,结合地震资料以及前人研究成果,将该区精细刻画为四种加积型镶边台地沉积模式:1)断控型窄陡镶边台地,以塔中261井区为代表;2)断控型宽陡镶边台地,以塔中62井区为代表;3)沉积型宽陡镶边台地,以塔中82井区为代表;4)沉积型宽缓镶边台地,以塔中45井区为代表。断控型的台地边缘能量相对较高,有利于礁滩体的发育,沉积型台地边缘能量相对较低,礁滩体欠发育。这四种模式的建立为该区下一步的储层预测和油气藏开发提供了有价值的参考。
By analysing abundant crop and core data,Lianglitage Formation of Upper Ordovician in the northern margin of isolated platform has been identified five micro-faces which are bank,bafflereef,algae mat,subtidal low energy zone.According to the high-low order of depositional energy,it constructs high frequency sedimentary group(reef-bank,reef-band-mound,bank-mound,grainstone bank,bank-algae mat,mound-algae mat,algae mat,low energy zone-algae mat)and analyses this eight depositional group evolution rule under the sequence framework.On this basis,synthesizing seismic data and research result of predecessors,it is divided into four aggradating rimmed-shelf sedimentary models delicately:1)fault-controlling narrow and sharp rimmed platform,taking Tazhong 261 area for example;2)fault-controlling wide and sharp rimmed platform,taking Tazhong 621 area for example;3)depositing wide and sharp rimmed platform,taking Tazhong 82 area for example;4)depositing wide and gentle rimmed platform,taking Tazhong 452 area for example.Fault-controlling platform margin has high energy,which is beneficial for reef-beach complex growth.These established models provide a valuable reference for Lianglitage Formation's exploration.
By analysing abundant crop and core data,Lianglitage Formation of Upper Ordovician in the northern margin of isolated platform has been identified five micro-faces which are bank,bafflereef,algae mat,subtidal low energy zone.According to the high-low order of depositional energy,it constructs high frequency sedimentary group(reef-bank,reef-band-mound,bank-mound,grainstone bank,bank-algae mat,mound-algae mat,algae mat,low energy zone-algae mat)and analyses this eight depositional group evolution rule under the sequence framework.On this basis,synthesizing seismic data and research result of predecessors,it is divided into four aggradating rimmed-shelf sedimentary models delicately:1)fault-controlling narrow and sharp rimmed platform,taking Tazhong 261 area for example;2)fault-controlling wide and sharp rimmed platform,taking Tazhong 621 area for example;3)depositing wide and sharp rimmed platform,taking Tazhong 82 area for example;4)depositing wide and gentle rimmed platform,taking Tazhong 452 area for example.Fault-controlling platform margin has high energy,which is beneficial for reef-beach complex growth.These established models provide a valuable reference for Lianglitage Formation's exploration.
引文
[1]赵宗举,等.塔里木盆地塔中—巴楚地区上奥陶统良里塔格组高频层序研究.塔里木油田公司研究报告,2007
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10赵宗举,吴兴宁,潘文庆,等.奥陶系岩相古地理研究[J].2009(待刊)
11顾家裕,张兴阳,罗平,等.塔里木盆地奥陶系台地边缘生物礁、滩发育特征[J].石油与天然气地质,2005,26(3):277-283
12陈景山,王振宁,代宗仰,等.塔中地区中上奥陶统台地镶边体系分析[J].古地理学报,1999,1(2):8-17
13谢晓安,吴奇之,卢华复,等.塔里木盆地古尚待构造格架与沉积特征[J].沉积学报,1997,15(1):152-155
14刘胜,杨海军,李新生等.塔中地区早奥陶世沉积特征沉积演化分析[J].新疆石油地质,2000,21(1):54-57
15张振生,李明杰,刘杜平.塔中低凸起的形成和演化[J].石油勘探与开发,2002,29(1):28-31
16贾承造.中国塔里木盆地构造特征与油气[M].北京:石油工业出版社,1997
17范国章,赵宗举,周进高,等.塔中Ⅰ号坡折带奥陶系凝析气田勘探中的古地貌学方法[J].海相油气地质,2006,11(2):52-56
18邬光辉,李启明,张宝收,等.塔中Ⅰ号断裂坡折带构造特征及勘探领域[J].石油学报,2005,26(1):27-30
1许荣华,张玉泉,谢应雯,等.西昆仑山北部早古生代构造—岩浆带的发现[J].地质科学,1994,29(4):313-328
2邓万明.喀喇昆仑西昆仑地区蛇绿岩的地质特征及其大地构造意义[J].岩石学报,1995,11(增刊):98-111
3高俊,汤耀庆,赵民,等.新疆南天山蛇绿岩的地质地球化学特征及形成环境初探[J].岩石学报,1995,11(增刊):85-97
4高长林,崔可锐,钱一雄,等.天山微板块构造与塔北盆地[M].北京:地质出版社,1995:1-158
5汤耀庆,高俊,赵民,等.西南天山蛇绿岩和蓝片岩[M].北京:地质出版社,1995:1-210
6张传禄,韩宇春,罗平.塔中地区中上奥陶统沉积相[J].古地理学报,2001,3(1):35-44
7朱日祥,杨振宇,吴汉宁,等.中国主要地块显生宙古地磁视极移曲线与地块运动[J].中国科学:D辑,1998,28(增刊):1-16
8Scotese C R.Paleogeographic Atlas:Paleomap Project Progress Report No.90-0497[M].Department of Geology,University of Texas at Ar-lington,Arlington,1997:45
9方大钧,沈忠岳,谈晓东,等.塔里木盆地显生宙古地磁与板块运动学[M].杭州:浙江大学出版社,2006:1-364
10赵宗举,吴兴宁,潘文庆,等.奥陶系岩相古地理研究[J].2009(待刊)
11顾家裕,张兴阳,罗平,等.塔里木盆地奥陶系台地边缘生物礁、滩发育特征[J].石油与天然气地质,2005,26(3):277-283
12陈景山,王振宁,代宗仰,等.塔中地区中上奥陶统台地镶边体系分析[J].古地理学报,1999,1(2):8-17
13谢晓安,吴奇之,卢华复,等.塔里木盆地古尚待构造格架与沉积特征[J].沉积学报,1997,15(1):152-155
14刘胜,杨海军,李新生等.塔中地区早奥陶世沉积特征沉积演化分析[J].新疆石油地质,2000,21(1):54-57
15张振生,李明杰,刘杜平.塔中低凸起的形成和演化[J].石油勘探与开发,2002,29(1):28-31
16贾承造.中国塔里木盆地构造特征与油气[M].北京:石油工业出版社,1997
17范国章,赵宗举,周进高,等.塔中Ⅰ号坡折带奥陶系凝析气田勘探中的古地貌学方法[J].海相油气地质,2006,11(2):52-56
18邬光辉,李启明,张宝收,等.塔中Ⅰ号断裂坡折带构造特征及勘探领域[J].石油学报,2005,26(1):27-30
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