准噶尔盆地克百断裂下盘二叠系砂砾岩的沉积模式

doi:10.11743/ogg20090611

Abstract

Abstract:

This paper aims at developing a sedimentary model of the Permian sandy conglomerate in the footwall of the Kebai Fault in the Junggar Basin,which can provide a reference for predicting good reservoirs.Sedimentary features of the sandy conglomerate in the study area are examined through core observation,thin section analysis and scanning electron microscope analysis.Tectonic settings and depositional conditions are taken into consideration and logging data are also consulted.The depositional environments of the sandy conglomerate in the study area can be divided into two types,namely above-water and underwater environments.Overall,the main feeder channels are large in water volume,and stable and continuous in water flow.Physical properties of the sandy conglomerate reservoirs differ greatly in different depositional environments,and the best occurs in underwater distributary channel on fan delta front.The control of shoreline on reservoir physical property is highlighted,while the distinction between alluvial fan margin and fan delta plain is obscured.A sedimentary model with alluvial fan-fan delta-lacustrine facies integrated is proposed and 3 sedimentary facies and 8 sedimentary subfacies are identified in the study area.

Key words: sandy conglomerate, sedimentary model, Permian, Kebai Fault, Junggar Basin

CLC Number:

TE122.1

Zhang Shuncun, Chen Lihua, Zhou Xinyan, Jiang Huan, Shi Ji'an, Jia Fanjian, Wu Zhixiong. Sedimentary model of the Permian sandy conglomerate in the footwall of the Kebai Fault,the Junggar Basin[J]. Oil & Gas Geology, 2009, 30(6): 740-746,753.

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Sedimentary model of the Permian sandy conglomerate in the footwall of the Kebai Fault,the Junggar Basin

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