塔里木盆地东河塘石炭系障壁岛后冲溢扇研究
- 收稿日期:
1996-05-10
- 刊出日期:
1997-03-10
摘要: 本文充分运用地质、测井、地震资料，对塔里木盆地东河塘石炭系障岛壁岛后冲溢扇进行了研究。从岩性特征、结构、沉积构造、垂向层序、地球物理、沉积背景、古地理条件等几个方面，详细阐述了冲溢扇的沉积特征。概括总结了冲溢扇的沉积模式，并对冲溢扇含油气性进行了论述，指出冲溢扇沉积特征研究不仅可以丰富沉积学理论，而且为寻找上倾尖灭油气藏提供了新的领域。
Study on the Carboniferous Washover Fan Behind Barrier lsland In Donghetang of Tarim Basin
- University of Petroleum Beijing 102200
- Received Date:
1996-05-10
- Publish Date:
1997-03-10
Abstract: In recent 20 years, while having payed attention to studying the modern barrier island sedimentarysystems, reople have made some researches on sedimentary characteristics of washover fans associatedwith barrier island and pointed out that there are many washover fans in ancient barrier island sedimen-tart' sequences, which opens up a new field for oil- gas exploration. Directed by modern sedimentary the-ory, authors studied the Carborriferous washover fans ind barrier island in the Donghetang area of theTarim basin by full uses of geological, logging and seismic data. The washover fan can be divided intosandstone type and limestone type. The former consists of siltstone,fine sandstone and brown mudstonewith graded and parrallel beddings. In the sandstone, quartz and chert content is 8070一9070，there aresome normal and multicrystal oolites in it. The latter is made up of brecciated tearing debris, fine silt andquartz, chert, coarse silt, which are associated with grey brown siltstone and grey green arenaceous lime-stone vertically. Grain probability curves of the washover fan almost are characterized by two segmentswith high content of suspension substance which is up to 30%.The thickness of sandstone typewashover fan vertical sedimentary structure sequence, which can be describedas“Bouma sequence AE,AAA and ABE'，i s 40-60 cm. The washover fan of limestone type shows massive structure as a whole,and there developed limestone brecciated with various sizeand shape, suspending among lime mud andsilty sand, and sedimentary thickness is about 1 m, which ismud. Affected by storm factor, tempestuous current carryingassociated with normal tidal flat lagoona great deal of basinal debris passed overbarrier island and formed washover fans extended toward lagoon about 1 kilometer in length and about10 square kilometerin area in atidal flat lagoon environment at the back of barrier island. The washoverhas good reservoir potential and pinches out quickly laterally, therefore, it‘s favorable for formidip pinch一outoil- gas po of w hi ch has been found in the Carboniferous stfata in the Lunnan area of the Tarim basin.
朱筱敏, 王贵文, 谢庆宾. 塔里木盆地东河塘石炭系障壁岛后冲溢扇研究[J]. 沉积学报, 1997, 15(1): 43-47.
| 引用本文: |
朱筱敏, 王贵文, 谢庆宾. 塔里木盆地东河塘石炭系障壁岛后冲溢扇研究[J]. 沉积学报, 1997, 15(1): 43-47.
|
Zhu Xiaomin, Wang Guiwen, Xie Qingbin. Study on the Carboniferous Washover Fan Behind Barrier lsland In Donghetang of Tarim Basin[J]. Acta Sedimentologica Sinica, 1997, 15(1): 43-47.
| Citation: |
Zhu Xiaomin, Wang Guiwen, Xie Qingbin. Study on the Carboniferous Washover Fan Behind Barrier lsland In Donghetang of Tarim Basin[J]. Acta Sedimentologica Sinica, 1997, 15(1): 43-47.
|
点击查看大图
下载:
