阿曼Daleel油田下白垩统Shuaiba组上段碳酸盐岩沉积相模式

下白垩统Shuaiba组上段（USH）是阿曼北部Daleel油田的主力产油层。随着勘探开发的深入，系统研究USH的沉积体系的内部构成、空间配置，建立沉积相模式，弄清有利储集体分布规律变得迫切必要。本文在地质、地震、古生物资料的基础上，采用沉积体系分析方法，对USH段的岩相组合和沉积环境做了详细研究，识别出了该段D层有滩间洼地(水深10～50 m)和浅滩(水深0～10 m)两种亚相，并在E1层的滩间洼地亚相发现了风暴沉积。研究了各亚相的沉积特征和沉积条件，建立了研究区下白垩系上Shuaiba组的沉积模式:区域浅海开阔台地背景上的伴有风暴沉积的障壁碳酸盐岩滩间洼地沉积模式。

Sedimentary Facies Model on Carbonate Rock in the Upper Shuaiba Member of Lower Cretaceous in Daleel Field, Oman

The Upper Shuaiba Member(USH) is the main force pay bed in the Daleel oil field. Based on the data of geology, seicmic and paleo-biology, the litho-facies assemblage and sedimentary environment in the USH were studied. Intershoal lows sub-facies (where the water depth is 10-50m) and shallow shoal sub-facies( where the water depth is not more than 10m) were extinguished in the layer D, and storm deposit was found in the layer E1, in which intershoal lows sub-facies also developed. The feature of the sedimentary sub-facies and the sedimentary condition were summarized and studied, and the sedimentary model was set up in the paper that the intershoal lows on carbonate rocks were developed under the background of broad land in shallow sea, where storm events usually occurred in the lower Cretaceous in the area.