准噶尔盆地侏罗系辫状河三角洲沉积特征
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摘要
辫状河三角洲是陆相沉积盆地重要的油气储集类型和今后油气勘探的重点对象。综合分析岩心、测井与地震资料,认为准噶尔盆地侏罗系三工河组发育的辫状河三角洲处于沉积坡度较缓的、沉积水体较浅的沉积背景,该辫状河三角洲不断地由盆地北侧边缘向盆地中央方向远距离前积,沉积了砂砾质的、发育大型交错层理和间断正韵律的、具有典型前积地震反射的进积型辫状河三角洲,进而论述了该三角洲的亚相和微相沉积特征以及有利的地层岩性圈闭勘探地区。
Braided river delta is an important reservoir type in continental sedimentary basins and the potential exploration target for the future.Core,log,and geophysical data indicate that the braided river delta in the Jurassic Sangonghe Formation of Junggar basin was deposited in an environment with gentle slope and shallow water.As a result of continuous progradation from the north to the center of the basin,arenaceous-conglomeritic deposits in the delta showed typical progradational seismic reflectance signatures,large cross bedding,and non-continuous positive rhythm.Its characteristics of sedimentary subfacies and microfacies as well as the favorable areas for exploration of lithologic traps are also discussed in this paper.
Braided river delta is an important reservoir type in continental sedimentary basins and the potential exploration target for the future.Core,log,and geophysical data indicate that the braided river delta in the Jurassic Sangonghe Formation of Junggar basin was deposited in an environment with gentle slope and shallow water.As a result of continuous progradation from the north to the center of the basin,arenaceous-conglomeritic deposits in the delta showed typical progradational seismic reflectance signatures,large cross bedding,and non-continuous positive rhythm.Its characteristics of sedimentary subfacies and microfacies as well as the favorable areas for exploration of lithologic traps are also discussed in this paper.
引文
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13赵澄林,朱筱敏.沉积岩石学[M].北京:石油工业出版社,2001.229~386
14 Zelilidis A,Piper D J W,Kontopoulos N.Sedimentation and basinevolution of the Oligocene-Miocene Mesohellenic basin,Greece[J].AAPG Bulletin,2002,86(1):161-182
15 Reading H G.Sedimentary environments:process,facies and stra-tigraphy[M].Cambridge:Blackwell Science,1996.172-209
16 Dela A L.Sedimentation in a low accommodation setting:nonma-rine(Cretaceous)Mannville and marine(Jurassic)Ellis groups,Manyberries field,southeastern Alberta[J].AAPG Bulletin,2005,88(10):1 391-1 418
2何登发,张义杰,王绪龙.准噶尔盆地大油气田勘探方向[J].新疆石油地质,2004,25(2):117~121
3张越迁,张年富.准噶尔盆地腹部油气勘探回顾与展望[J].新疆石油地质,1998,21(2):67~70
4邱楠生,杨海波,王绪龙.准噶尔盆地构造-热演化特征[J].地质科学,2002,37(4):423~429
5张满郎,张琴,朱筱敏.准噶尔盆地侏罗系层序地层划分探讨[J].石油实验地质,2000,22(3):236~240
6朱筱敏,康安,张琴,等.准噶尔盆地东北缘侏罗系含煤岩系层序地层和隐蔽圈闭[J].石油与天然气地质,2002,23(2):121~126
7徐志诚.准噶尔盆地侏罗系地层与岩性油气藏形成条件及勘探前景[J].油气地质与采收率,2005,12(5):27~29
8刘豪,王英民.准噶尔盆地坳陷湖盆坡折带在非构造圈闭勘探中的应用[J].石油与天然气地质,2004,25(4):422~427
9张年富,齐雪峰,王英民,等.准噶尔盆地侏罗系Ⅲ层序底界上下砂体预测与有利区评价[J].石油与天然气地质,2002,23(2):145~149
10高新生,赵霞飞,李天明,等.准噶尔盆地西部侏罗系层序地层特征[J].石油与天然气地质,2001,22(2):165~168
11孙枢.中国沉积学的今后发展:思考与建议[J].地学前缘,2005,12(2):3~10
12薛良清,Galloway W E.扇三角洲、辫状河三角洲与三角洲体系的分类[J].地质学报,1991,65(2):41~53
13赵澄林,朱筱敏.沉积岩石学[M].北京:石油工业出版社,2001.229~386
14 Zelilidis A,Piper D J W,Kontopoulos N.Sedimentation and basinevolution of the Oligocene-Miocene Mesohellenic basin,Greece[J].AAPG Bulletin,2002,86(1):161-182
15 Reading H G.Sedimentary environments:process,facies and stra-tigraphy[M].Cambridge:Blackwell Science,1996.172-209
16 Dela A L.Sedimentation in a low accommodation setting:nonma-rine(Cretaceous)Mannville and marine(Jurassic)Ellis groups,Manyberries field,southeastern Alberta[J].AAPG Bulletin,2005,88(10):1 391-1 418
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