伊通盆地岔路河断陷重力流沉积特征及油气勘探意义
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摘要
伊通盆地岔路河断陷始新统中发育大量水下重力流沉积,根据重力流发育位置及沉积特征,可划分为浅水浊流沉积、深水浊流沉积、水下滑塌沉积和水下泥石流沉积4种类型。通过对本区区域地质背景、钻井岩性、测井和地震等资料的综合研究,认为水下滑塌和水下泥石流沉积为再搬运和再沉积作用的产物,常与断裂相伴生;但浅水及深水浊流沉积常发育在前扇三角洲部位,大部分是由阵发性水下分流河道水流事件形成的,部分属于滑塌浊流二次沉积成因。油气勘探成果表明,研究区水下浊积砂体的储集物性普遍较好,并已有油气勘探突破,证实位于二号断层下降盘的梁家构造带和万昌构造带周缘的深水浊积砂体和浅水浊积砂体有着良好的油气勘探前景。
Lots of subaqueous gravity flow sedimentary bodies were developed in the Eocene strata of Chaluhe Fault Depression,the Yitong Basin.Based on the study of distribution and sedimentary character of gravity flow,four sedimentary types can be recognized: shallow-water and deep-water turbidity current deposits,underwater slide deposits and underwater debris flow deposits.Through the comprehensive analysis of regional geological background,drilling lithology,well loggings and seismic data,it is suggest that underwater slide deposits and underwater debris flow deposits were formed in re-transported and redeposition,which were usually associated with faults.Shallow-water and deepwater turbidity current deposits were developed in the pre-fan delta,and mostly related to the paroxysmal water flow event due to subaqueous distributary channel,and partially to the slump turbidity current redeposition.Based on the oil-gas exploration results,it shows that the turbidity sand-body has developed well reservoir capability and has a successful oil-gas exploration.It has been proved that shallow-water and deep-water turbidite sand bodies have good potentials for oil and gas exploration in this region,which are in Liangjia structural belt of the down-thrown side of the No.2 fault and in the periphery of Wanchang structural belt.
Lots of subaqueous gravity flow sedimentary bodies were developed in the Eocene strata of Chaluhe Fault Depression,the Yitong Basin.Based on the study of distribution and sedimentary character of gravity flow,four sedimentary types can be recognized: shallow-water and deep-water turbidity current deposits,underwater slide deposits and underwater debris flow deposits.Through the comprehensive analysis of regional geological background,drilling lithology,well loggings and seismic data,it is suggest that underwater slide deposits and underwater debris flow deposits were formed in re-transported and redeposition,which were usually associated with faults.Shallow-water and deepwater turbidity current deposits were developed in the pre-fan delta,and mostly related to the paroxysmal water flow event due to subaqueous distributary channel,and partially to the slump turbidity current redeposition.Based on the oil-gas exploration results,it shows that the turbidity sand-body has developed well reservoir capability and has a successful oil-gas exploration.It has been proved that shallow-water and deep-water turbidite sand bodies have good potentials for oil and gas exploration in this region,which are in Liangjia structural belt of the down-thrown side of the No.2 fault and in the periphery of Wanchang structural belt.
引文
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9王居峰,郑和荣,苏法卿.东营凹陷中带沙河街组三段浊积体储层特征类型与成因[J].石油与天然气地质,2004,25(5):53~57
10邓宏文,王红亮,王居峰等.层序地层构成与层序控砂、控藏的自相似特征:以三角洲—浊积扇体系为例[J].石油与天然气地质,2004,25(5):16~20
11李思田.含能源盆地沉积体系:中国内陆和近海主要沉积体系类型的典型分析[M].武汉:中国地质大学出版社,1996.107~116
12 Shanmugam G.50 Years of the turbidite paradigm(1950s-1990s):Deep-water processes and facies models—a criticalperspective[J].Marine and Petroleum Geology,2000,17:285~342
13 Galloway W E.Siliciclastic slope and base-of-slope depositionalsystem:component facies,stratigraphic architecture,and classifi-cation[J].AAPG Bulletin,1998,82(4):569~595
14 Middleton G,Hampton M A.Subaqueous sediment transportand deposition by sediment gravity flows[A].Stanley D J,ed.Marine Sediment Transport and Environmental Manage-ment[C].NewYork:Wiley,1976.197~218
2高延新,吴崇筠.辽河盆地大湾河油层湖底扇沉积特征[J].沉积学报,1985,3(4):83~94
3赖生华,麻建明,孙来喜.断陷湖盆层序演化对储集体成因类型及构型的控制[J].石油实验地质,2005,27(4):360~364
4赖婉琦,顾家裕.渤海湾含油气盆地中的浊积岩[J].沉积学报,1980,(17):799~801
5李祯,温显端,周慧堂等.鄂尔多斯盆地东缘中生代延长组浊流沉积的发现与意义[J].现代地质,1995,9(1):99~107
6李文厚,周立发,符俊辉等.库车坳陷上三叠统的浊流沉积及石油地质意义[J].沉积学报,1997,15(1):20~24
7温志新,王红漫,陈春强等.南襄盆地泌阳凹陷南部陡坡带隐蔽油气藏形成与分布[J].石油实验地质,2006,28(2):117~121
8李顺明.低密度浊流的沉积成因及控制因素:以东营凹陷广利油田纯化镇组为例[J].油气地质与采收率2005,12(4):33~35
9王居峰,郑和荣,苏法卿.东营凹陷中带沙河街组三段浊积体储层特征类型与成因[J].石油与天然气地质,2004,25(5):53~57
10邓宏文,王红亮,王居峰等.层序地层构成与层序控砂、控藏的自相似特征:以三角洲—浊积扇体系为例[J].石油与天然气地质,2004,25(5):16~20
11李思田.含能源盆地沉积体系:中国内陆和近海主要沉积体系类型的典型分析[M].武汉:中国地质大学出版社,1996.107~116
12 Shanmugam G.50 Years of the turbidite paradigm(1950s-1990s):Deep-water processes and facies models—a criticalperspective[J].Marine and Petroleum Geology,2000,17:285~342
13 Galloway W E.Siliciclastic slope and base-of-slope depositionalsystem:component facies,stratigraphic architecture,and classifi-cation[J].AAPG Bulletin,1998,82(4):569~595
14 Middleton G,Hampton M A.Subaqueous sediment transportand deposition by sediment gravity flows[A].Stanley D J,ed.Marine Sediment Transport and Environmental Manage-ment[C].NewYork:Wiley,1976.197~218
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